AU2021418328A1

AU2021418328A1 - Turbine fracturing system, controlling method thereof, controlling apparatus and storage medium

Info

Publication number: AU2021418328A1
Application number: AU2021418328A
Authority: AU
Inventors: Xiaolei JI; Zhuqing Mao; Jianwei Wang; Jihua Wang; Peng Zhang; Rikui Zhang
Original assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Current assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Priority date: 2021-06-02
Filing date: 2021-06-17
Publication date: 2023-01-05
Also published as: CA3126779C; CA3126779A1; WO2022252294A1

Abstract

A turbine fracturing system, comprising: N turbine fracturing apparatuses, wherein each of the N turbine fracturing apparatuses comprises a turbine engine, and N is an integer greater than or equal to 2; a fuel gas supply apparatus connected to N turbine engines, wherein the fuel gas supply apparatus is configured to supply fuel gas and distribute the fuel gas to the N turbine engines as gaseous fuel; and a fuel liquid supply apparatus connected to at least one of the N turbine engines and configured to supply liquid fuel to at least one of the N turbine fracturing apparatuses in a case that at least one of a flow rate and a pressure of the fuel gas decreases.

Description

TURBINE FRACTURING SYSTEM, CONTROLLING METHOD THEREOF, CONTROLLING APPARATUS AND STORAGE MEDIUM CROSS-REFERNECE TO RELATED APPLICATIONS

[0001] For all purposes, the present application claims priority to Chinese patent application No. 202110612965.6, fled on June 2, 2021 under the title of "TURBINE

FRACTURING SYSTEM, CONTROLLING METHOD THEREOF, CONTROLLING

APPARATUS AND STORAGE MEDIUM" and Chinese patent application No.

202121227483.0, fled on June 2, 2021 under the title of "TURBINE FRACTURING

SYSTEM", the entire disclosures of which are incorporated herein by reference as part of the

present application.

TECHNICAL FIELD

[0002] Embodiments of the present disclosure relate to a turbine fracturing system and

a controlling method thereof, a controlling apparatus and a computer-readable storage medium.

BACKGROUND

[0003] In a hydraulic fracturing system using a turbine engine to drive a plunger pump,

the plunger pump is driven by the turbine engine. The turbine engine may use diesel oil or

natural gas as a fuel. The use of natural gas has considerable cost advantage, so fuel gas is

mostly used in actual production.

SUMMARY

[0004] According to first aspect of the present disclosure, it is provided a turbine

fracturing system, comprising: N turbine fracturing apparatuses, wherein each of the N turbine

fracturing apparatuses comprises a turbine engine, and N is an integer greater than or equal to

2; a fuel gas supply apparatus connected to N turbine engines, wherein the fuel gas supply

apparatus is configured to supply fuel gas and distribute the fuel gas to the N turbine engines

as gaseous fuel; and a fuel liquid supply apparatus connected to at least one of the N turbine

engines and configured to supply liquid fuel to at least one of the N turbine engines in a case that at least one of a flow rate and a pressure of the fuel gas decreases.

[0005] In at least one embodiment, the turbine fracturing system further comprises a measurement and control apparatus, the measurement and control apparatus comprising a data acquisition device and a data processing device. The data acquisition device is in signal connection with the fuel gas supply apparatus, and configured to acquire first fuel gas data of the fuel gas and send the first fuel gas data to the data processing device. The data processing device comprises a comparison and determination circuit and a control circuit. The comparison and determination circuit is in signal connection with the data acquisition device, the comparison and determination circuit is configured to compare the first fuel gas data with a first threshold value and determine whether the first fuel gas data is smaller than the first threshold value; the first fuel gas data comprises the at least one of the pressure and the flow rate of the fuel gas, and the first threshold value comprises at least one of afirst pressure threshold value corresponding to the pressure and a first flow rate threshold value corresponding to the flow rate. The control circuit is in signal connection with the comparison and determination circuit, the control circuit is configured to select the at least one of the N turbine engines and generate a first fuel switching signal in response to the first fuel gas data being smaller than the first threshold value. The first fuel switching signal is used for switching the gaseous fuel of the at least one of the N turbine engines into liquid fuel.

[0006] In at least one embodiment, the turbine fracturing system further comprises a fuel liquid storage device which is arranged on the turbine fracturing apparatus and connected with the turbine engine, and the fuel liquid supply apparatus supplies the liquid fuel to the at least one of the N turbine engines through the fuel liquid storage device. Each of the N turbine fracturing apparatuses further comprises a local control device in signal connection with the turbine engine. The control circuit is further configured to send the first fuel switching signal to the local control device which is in signal connection with the at least one of the N turbine engines as selected. The local control device is configured to switch the gaseous fuel of the at least one of the N turbine engines as selected to the liquid fuel according to the first fuel switching signal; the liquid fuel is supplied by the fuel liquid storage device connected to the at least one of the N turbine engines as selected.

[00071 In at least one embodiment, the turbine fracturing system further comprises a fuel gas delivery device connected with the turbine engine, and the fuel gas supply apparatus supplies the gaseous fuel to the turbine engine through the fuel gas delivery device. The local control device comprises a local control circuit and a switching circuit; the local control circuit is configured to receive the first fuel switching signal and control the switching circuit to realize switching from the gaseous fuel to the liquid fuel. The switching circuit is respectively connected to the fuel liquid storage device and the fuel gas delivery device which are arranged on a same turbine fracturing apparatus, and is configured to switch from the fuel gas delivery device to the fuel liquid storage device under a control of the local control circuit.

[0008] In at least one embodiment, the at least one of the N turbine engines as selected comprises a turbine engine with a longest operational time; the turbine engine with the longest

operational time satisfies at least one of the following three conditions: a current liquid amount

of the liquid fuel stored in the turbine engine is the largest; a load of the turbine engine is the

smallest; and a ratio of the current liquid amount of the liquid fuel stored in the turbine engine

to the load of the turbine engine is the highest.

[0009] In at least one embodiment, the data acquisition device is further configured to acquire second fuel gas data of the fuel gas and send the second fuel gas data to the data

processing device, and the second fuel gas data comprises a change rate of the first fuel gas

data. The comparison and determination circuit is further configured to compare the second

fuel gas data with a change rate threshold value and send a comparison result to the control

circuit. The control circuit is further configured to adjust a total displacement of the turbine

fracturing system according to the comparison result.

[0010] In at least one embodiment, the change rate of the first fuel gas data comprises

a reduction rate of the first fuel gas data, and the change rate threshold value comprises a

reduction rate threshold value of the first fuel gas data. The comparison and determination

circuit is further configured to compare the second fuel gas data with the reduction rate

threshold value of the first fuel gas data and determine whether the second fuel gas data is

greater than or equal to the reduction rate threshold value of the first fuel gas data. The control

circuit is further configured to generate a first displacement reduction signal for reducing the

total displacement of the turbine fracturing system in response to the second fuel gas data being

greater than or equal to the reduction rate threshold value of the first fuel gas data.

[0011] In at least one embodiment, the fuel liquid supply apparatus comprises N fuel liquid storage devices which are arranged on the N turbine fracturing apparatuses in one-to

one correspondence and connected with the N turbine engines in one-to-one correspondence.

The data acquisition device is further configured to acquire a current total liquid amount of the

liquid fuels stored in all the N fuel liquid storage devices and send the current total liquid

amount to the data processing device. The comparison and determination circuit is further

configured to compare the current total liquid amount with a total liquid amount threshold value

and determine whether the current total liquid amount is smaller than the total liquid amount

threshold value. The control circuit is further configured to generate a second displacement

reduction signal for reducing the total displacement of the turbine fracturing system in response

to the current total liquid amount being smaller than the total liquid amount threshold value.

[0012] In at least one embodiment, the comparison and determination circuit is further

configured for: determining whether a turbine engine having switched to the liquid fuel is

existed, in response to the first fuel gas data being greater than or equal to thefirst threshold

value; and comparing the first fuel gas data and a second threshold value and determining

whether the first fuel gas data is greater than or equal to the second threshold value, in response

to the turbine engine having switched to the liquid fuel being existed, wherein the second

threshold value is greater than the first threshold value. The control circuit is further configured

to generate a second fuel switching signal for switching the liquid fuel of the turbine engine

having switched to the liquid fuel back to the gaseous fuel in response to the first fuel gas data

being greater than or equal to the second threshold value.

[00131 In at least one embodiment, the control circuit is further configured to acquire a

total number M of the turbine engines having switched to the liquid fuel, wherein M is a

positive integer smaller than N; the control circuit is further configured to select a turbine

engine with the shortest operational time among M turbine engines and generate the second

fuel switching signal for switching the liquid fuel of the turbine engine with the shortest

operational time back to the gaseous fuel. The turbine engine with the shortest operational time

satisfies at least one of the following three conditions: a current liquid amount of the liquid fuel

stored in the turbine engine is the smallest; a load of the turbine engine is the largest; and a

ratio of the current liquid amount of the liquid fuel stored in the turbine engine to the load of the turbine engine is the lowest.

[0014] According to second aspect of the present disclosure, it is provided a controlling method of a turbine fracturing system, comprising: acquiring first fuel gas data of fuel gas, wherein the fuel gas is distributed to N turbine engines and used as gaseous fuel of the N turbine engines, and N is an integer greater than or equal to 2; determining whether at least one of a flow rate and a pressure of the fuel gas decreases according to the first fuel gas data; and supplying liquid fuel to the at least one ofN turbine engines in response to a decrease in the at least one of the flow rate and the pressure of the fuel gas.

[0015] In at least one embodiment, the determining whether the at least one of the flow rate and the pressure of the fuel gas decreases according to the first fuel gas data comprises: comparing the first fuel gas data with afirst threshold value, and determining whether the first fuel gas data is smaller than the first threshold value; the first fuel gas data comprises the at least one of the pressure and the flow rate of the fuel gas, and thefirst threshold value comprises at least one of afirst pressure threshold value corresponding to the pressure and a first flow rate threshold value corresponding to the flow rate. The supplying the liquid fuel to the at least one of the N turbine engines in response to the decrease in the at least one of the flow rate and the pressure of the fuel gas comprises: selecting the at least one of the N turbine engines and switching the gaseous fuel of the at least one of the N turbine engines to the liquid fuel in response to the first fuel gas data being smaller than thefirst threshold value.

[0016] In at least one embodiment, the selecting the at least one of the N turbine engines and the switching the gaseous fuel of the at least one of the N turbine engines to the liquid fuel in response to the first fuel gas data being smaller than thefirst threshold value comprises: selecting a turbine engine with the longest operational time among the N turbine engines, and switching the gaseous fuel of the turbine engine with the longest operational time to the liquid fuel. The turbine engine with the longest operational time satisfies at least one of the following three conditions: a current liquid amount of the liquid fuel stored in the turbine engine is the largest; a load of the turbine engine is the smallest; and a ratio of the current liquid amount of the liquid fuel stored in the turbine engine to the load of the turbine engine is the highest.

[00171 In at least one embodiment, the controlling method of the turbine fracturing system further comprises: determining whether the gaseous fuels of all the N turbine engines are switched to liquid fuels.

[00181 In at least one embodiment, the controlling method of the turbine fracturing system further comprises: acquiring second fuel gas data of the fuel gas in response to the gaseous fuels of all the N turbine engines being switched to liquid fuels, wherein the second fuel gas data comprises a change rate of the first fuel gas data; comparing the second fuel gas data with a change rate threshold value; and adjusting a total displacement of the turbine fracturing system according to a comparison result.

[0019] In at least one embodiment, the change rate of the first fuel gas data comprises a reduction rate of the first fuel gas data, and the change rate threshold value comprises a reduction rate threshold value of the first fuel gas data. The comparing the second fuel gas data with the change rate threshold value comprises: comparing the second fuel gas data with the reduction rate threshold value of the first fuel gas data, and determining whether the second fuel gas data is greater than or equal to the reduction rate threshold value of the first fuel gas data. The adjusting the total displacement of the turbine fracturing system according to the comparison result comprises: reducing the total displacement of the turbine fracturing system in response to the second fuel gas data being greater than or equal to the reduction rate threshold value of the first fuel gas data.

[0020] In at least one embodiment, the controlling method of the turbine fracturing system further comprises: acquiring a current total liquid amount of liquid fuels stored in all the N turbine engines in response to the gaseous fuels of all the N turbine engines being switched to the liquid fuels; comparing the current total liquid amount with a total liquid amount threshold value; and adjusting the total displacement of the turbine fracturing system according to a comparison result.

[0021] In at least one embodiment, the comparing the current total liquid amount with the total liquid amount threshold value comprises: comparing the current total liquid amount with the total liquid amount threshold value, and determine whether the current total liquid amount is smaller than the total liquid amount threshold value. The adjusting the total displacement of the turbine fracturing system according to the comparison result comprises: reducing the total displacement of the turbine fracturing system in response to the current total liquid amount being smaller than the total liquid amount threshold value.

[00221 In at least one embodiment, the comparing the current total liquid amount with the total liquid amount threshold value comprises: comparing the current total liquid amount

with the total liquid amount threshold value, and determining whether the current total liquid

amount is smaller than the total liquid amount threshold value; and the adjusting the total

displacement of the turbine fracturing system according to the comparison result comprises:

adjusting the total displacement of the turbine fracturing system according to the comparison

result.

[0023] In at least one embodiment, the controlling method of the turbine fracturing system further comprises: determining whether a turbine engine having switched to the liquid

fuel is existed, in response to the first fuel gas data being greater than or equal to the first

threshold value; comparing the first fuel gas data and a second threshold value and determining

threshold value is greater than the first threshold value; and switching the liquid fuel of the

turbine engine having switched to the liquid fuel back to the gaseous fuel in response to the

first fuel gas data being greater than or equal to the second threshold value.

[0024] According to third aspect of the present disclosure, it is provided a controlling apparatus, comprising: a processor; and a memory, wherein a computer-executable code is

stored in the memory, and the computer-executable code is configured to execute the above

mentioned controlling method of the turbine fracturing system when executed by the processor.

[0025] According to fourth aspect of the present disclosure, it is provided a computer readable storage medium stored with a computer-executable code, wherein the computer

executable code causes a processor to execute the above-mentioned controlling method of the

turbine fracturing system when executed by the processor.

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to clearly illustrate the technical solution of the embodiments of the

disclosure, the drawings of the embodiments will be briefly described in the following; it is

obvious that the described drawings are only related to some embodiments of the disclosure

and thus are not limitative of the disclosure.

[00271 Fig. 1A is a schematic diagram of a turbine fracturing system provided according to an embodiment of the present disclosure;

[0028] Fig. 1B is a schematic diagram of a turbine fracturing system provided according to another embodiment of the present disclosure;

[0029] Fig. 2 is a schematic diagram of a turbine fracturing apparatus provided according to an embodiment of the present disclosure;

[0030] Fig. 3 is a schematic diagram of a measurement and control apparatus provided according to an embodiment of the present disclosure;

[0031] Fig. 4 is a flowchart of a controlling method of a turbine fracturing system provided according to an embodiment of the present disclosure;

[0032] Fig. 5 is a flowchart of a controlling method of a turbine fracturing system provided according to another embodiment of the present disclosure;

[0033] Fig. 6 is a flowchart of a controlling method of a turbine fracturing system provided according to yet another embodiment of the present disclosure;

[0034] Fig. 7 is a flowchart of a controlling method of a turbine fracturing system provided according to still another embodiment of the present disclosure;

[0035] Fig. 8 is a schematic diagram of a controlling apparatus provided according to an embodiment of the present disclosure; and

[0036] Fig. 9 is a schematic diagram of a storage medium provided according to an

embodiment of the present disclosure.

DETAILED DESCRIPTION

[00371 In order to make objects, technical details and advantages of the embodiments of the disclosure apparent, the technical solutions of the embodiments will be described in a

clearly and fully understandable way in connection with the drawings related to the

embodiments of the disclosure. Apparently, the described embodiments are just a part but not

all of the embodiments of the disclosure. Based on the described embodiments herein, those

skilled in the art can obtain other embodiment(s), without any inventive work, which should

be within the scope of the disclosure.

[0038] Unless otherwise defined, all the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terms "first," "second," etc., which are used in the description and the claims of the present disclosure, are not intended to indicate any sequence, amount or importance, but distinguish various components. The terms "comprises," "comprising,"

"includes," "including," etc., are intended to specify that the elements or the objects stated

before these terms encompass the elements or the objects and equivalents thereof listed after

these terms, but do not preclude the other elements or objects. The phrases "connect",

"connected", etc., are not intended to define a physical connection or mechanical connection,

but may include an electrical connection, directly or indirectly. "On," "under," "right," "left"

and the like are only used to indicate relative position relationship, and in the case that the

position of the object which is described is changed, the relative position relationship may be

changed accordingly.

[00391 At present, in gas turbine engines, in addition to compressed natural gas (CNG), liquefied natural gas (LNG) can also be used. There are many ways to supply the natural gas,

for example, it can be delivered to a turbine engine by a CNG tanker via a CNG pressure

regulating apparatus, or by an LNG tanker via an LNG gasification conveying apparatus, etc.

In the case that switching the tankers, it may, sometimes, involve the problem of insufficient

natural gas at the supply side. In such case, operators are required to manually switch the fuel

depending on field conditions of well sites. If a manual switching operation fails or is not done

timely, it may not only result in the turbine fracturing apparatus unable to continue working

(e.g., shutting down), but also cannot guarantee the operation safety of operators.

[0040] At least one embodiment of the present disclosure provides a turbine fracturing system, the turbine fracturing system includes: N turbine fracturing apparatuses, each of the N

turbine fracturing apparatuses includes a turbine engine, and N is an integer greater than or

equal to 2; a fuel gas supply apparatus connected to N turbine engines, the fuel gas supply

engines and configured to supply liquid fuel to the at least one of the N turbine engines in a

case that at least one of a flow rate and a pressure of the fuel gas decreases.

[0041] In the turbine fracturing system provided by at least one embodiment of the present disclosure, in the case that at least one of the flow rate and pressure of the fuel gas decreases, the fuel liquid supply apparatus supplies liquid fuel to at least one of the N turbine fracturing apparatuses. That is, in the case that the fuel gas supplied by the fuel gas supply apparatus is insufficient, the fuel liquid supply apparatus can be controlled to automatically supply liquid fuel to the turbine engine, so that the normal operation of the N turbine fracturing apparatuses can be ensured and the turbine fracturing system can maintain a normal displacement output. Moreover, because the switching from gaseous fuel to liquid fuel is automatically completed, the operation safety of operators is improved and the labor intensity of manual operation is reduced.

[0042] In the embodiment of the present disclosure, the "flow rate" refers to the amount of fluid (liquid or gas) flowing through the effective cross-section of a closed pipeline or open

channel per unit time, also known as instantaneous flow rate. When the amount of fluid is

expressed by volume, it is called volume flow rate; when the amount of fluid is expressed by

mass, it is called mass flow rate. For example, the "gas flow rate" refers to the volume of gas

flowing through the flow section per unit time under a certain pressure and a certain

temperature.

[0043] In the embodiment of the present disclosure, the fuel supplied to the turbine engine includes combustible gaseous fuel (fuel gas for short) or combustible liquid fuel (fuel

liquid for short). For example, the fuel gas includes compressed natural gas (CNG). For

example, the fuel liquid includes diesel oil, bio-fuel oil or liquefied natural gas (LNG), etc.

[0044] In the embodiment of the present disclosure, by acquiring relevant status data of the fuel gas output from the fuel gas supply apparatus, such as the pressure and/or flow rate

of the fuel gas, the supply status of the fuel gas can be determined, and then the automatic

switching from gaseous fuel to liquid fuel can be realized according to the supply status.

[0045] Hereinafter, the present disclosure will be explained by several specific embodiments. In order to keep the following description of the embodiments of the present

disclosure clear and concise, detailed descriptions of known functions and known components

may be omitted. In the case that any component of an embodiment of the present disclosure

appears in more than one figure, the component may be denoted by the same reference numeral

in each of the figures.

[00461 Fig. 1A is a schematic diagram of a turbine fracturing system provided according to an embodiment of the present disclosure. As shown in Fig. 1A, the turbine

fracturing system 1 includes N turbine fracturing apparatuses A, a fuel gas supply apparatus 10,

and a fuel liquid supply apparatus 20, wherein N is an integer greater than or equal to 2. For

example, the N turbine fracturing apparatuses are turbine fracturing apparatuses Al, A2.... An.

Each of the turbine fracturing apparatuses A includes a turbine engine 100. In the embodiment

of the present disclosure, the turbine fracturing apparatus is a vehicle-mounted or a semi-trailer

mounted or a skid-mounted apparatus. For example, the turbine fracturing apparatus includes

a turbine fracturing trailer. For example, the turbine fracturing apparatus includes a turbine

fracturing trailer group composed of a plurality of turbine fracturing trailers.

[00471 For example, the turbine fracturing apparatus A further includes a plunger pump 101, and the turbine engine 100 is connected with the plunger pump 101 so that kinetic energy

generated by the turbine engine 100 is transmitted to the plunger pump 101. In an example, the

turbine fracturing apparatus A may further include a reduction gearbox and a transmission

mechanism (not shown) disposed between the turbine engine 100 and the plunger pump 101.

An output end of the turbine engine 100 is connected with the reduction gearbox; and the

reduction gearbox and the plunger pump 101 are in transmission connection there-between

through the transmission mechanism. Compared with the traditional fracturing device by using

diesel engine as power source, the plunger pump is driven by the turbine engine which has

large power-volume ratio and small occupied area, thus greatly reducing the number of

fracturing apparatuses and the occupied area of the entire fracturing system.

[0048] As shown in Fig. 1A, a fuel gas supply apparatus 10 is connected to the N

turbine engines and is configured to supply fuel gas and distribute the fuel gas to the N turbine

engines as gaseous fuel.

[0049] Fig. 2 is a schematic diagram of a turbine fracturing apparatus provided according to an embodiment of the present disclosure.

[0050] As shown in Figs. 1A and 2, for example, the turbine fracturing system 1 further

includes a fuel gas delivery device 103. The fuel gas delivery device 103 is connected to the

turbine engine 100. The fuel gas supply apparatus 10 supplies the gaseous fuel to the turbine

fracturing apparatus A through the fuel gas delivery device 103. That is, one end of the fuel gas delivery device 103 is connected with the fuel gas supply apparatus 10, and the other end is connected with the turbine fracturing apparatus 100. In this way, in the case that the fuel gas in the fuel gas supply apparatus 10 is reduced, the gaseous fuel delivered to the turbine engine

100 can be controlled by controlling the fuel gas delivery device 103 on the turbine fracturing

apparatus A (for example, switching from gaseous fuel to liquid fuel).

[0051] For example, the fuel gas delivery device includes a delivery pipeline. The delivery pipeline includes, for example, a main pipeline and a plurality of branch pipelines

connected with the main pipeline; one end of the main pipeline is communicated with the fuel

gas supply apparatus 10, and the other end is communicated with the plurality of branch

pipelines; and each of the branch pipelines is communicated with one of the turbine engines.

In this way, the fuel gas supply apparatus 10 can distribute the fuel gas to the N turbine engines.

[0052] In an embodiment of the present disclosure, the fuel gas supply apparatus 10 is, for example, a CNG tanker, and the number of CNG tankers may be one or more. For example,

the fuel gas supply apparatus 10 delivers the fuel gas to N turbine engines through N fuel gas

delivery devices 103 in one-to-one correspondence, which can prevent the gas from leaking

during the delivery process of gas so as to improve the safety.

[0053] Optionally, a CNG pressure regulating device is further arranged between the CNG tanker and the fuel gas delivery device 103, and natural gas is delivered from the CNG

tanker to the turbine engine 100 after the pressure of the natural gas is regulated by the CNG

pressure regulating device. In this way, the pressure of the fuel gas can be conveniently adjusted

according to demands of actual production.

[0054] For example, the number of fuel gas delivery devices 103 is N, and the N fuel

gas delivery devices 103 are connected with the N turbine engines 100 in one-to-one

correspondence. It can be understood that the N fuel gas delivery devices shown in Fig. 1A are

merely illustrative, and the number of the fuel gas delivery devices 103 can be larger or smaller

than N. For example, in the case that the number of the fuel gas delivery devices 103 is smaller

than N, each of the fuel gas delivery devices 103 can supply gaseous fuel to two or more turbine

engines 100 simultaneously. In the embodiment of the present disclosure, an example in which

N fuel gas delivery devices 103 are adopted is preferable, because it's beneficial to realize

independent control of gaseous fuel to the N turbine engines 100.

[0055] For example, the fuel liquid supply apparatus 20 is connected to at least one of the N turbine engines and is configured to supply liquid fuel to at least one of the N turbine

fracturing apparatuses A in the case that at least one of the flow rate and pressure of the fuel

gas decreases. In the case that at least one of the flow rate and pressure of the fuel gas decreases,

the flow rate and/or pressure of the gaseous fuel delivered to the plurality of fuel gas delivery

devices 103 would be reduced correspondingly, and if liquid fuel is not supplied, the problem

of apparatus shutdown is likely to occur. In the embodiment of the present disclosure, by

utilizing the fuel liquid supply apparatus 20 to supply liquid fuel to at least one of the N turbine

fracturing apparatuses A, the above-mentioned problem of apparatus shutdown can be avoided,

and the normal operation of the turbine fracturing apparatuses A can be effectively ensured.

[0056] For example, as shown in Figs. 1A and 2, the turbine fracturing system 1 further includes a fuel liquid storage device 102, which is arranged on the turbine fracturing apparatus

A and connected to the turbine engine 100. The fuel liquid supply apparatus 20 supplies the

liquid fuel to the turbine engine through the fuel liquid storage device 102. That is, one end of

the fuel liquid storage device 102 is connected with the fuel liquid supply apparatus 20, and

the other end is connected with the turbine engine 100.

[00571 In the embodiment of the present disclosure, the fuel liquid supply apparatus 20 is, for example, a diesel vehicle, and the number of the diesel vehicle may be one or more. For

example, the fuel liquid supply apparatus 20 can be connected with the fuel liquid storage

device 102 through a fuel liquid delivery device, which can prevent from liquid leakage during

the liquid delivery so as to improve the safety.

[0058] For example, the number of the fuel liquid storage devices 102 is N, and the N

fuel liquid storage devices 102 are connected with the N turbine engines 100 in one-to-one

correspondence. It can be understood that the N fuel liquid storage devices 102 shown in Fig.

1A are merely illustrative, and the number of the fuel liquid storage devices 102 can be larger

or smaller than N. For example, in the case that the number of the fuel liquid storage devices

102 is smaller than N, each of the fuel liquid storage devices 102 can supply liquid fuel to two

or more turbine engines 100 simultaneously. In the embodiment of the present disclosure, an

example in which N fuel liquid storage devices 102 are adopted is preferable because it's

beneficial to realize independent control of liquid fuel to the N turbine engines 100.

[0059] Fig. lB is a schematic diagram of a turbine fracturing system provided according to another embodiment of the present disclosure. Compared with the turbine

fracturing system of Fig. 1A, an independent fuel liquid supply apparatus 20 is not provided in

Fig. 1B; instead, the fuel liquid supply apparatus 20 includes a fuel liquid storage device 102

provided on each of the turbine fracturing apparatuses A. That is, the fuel liquid supply

apparatus 20 includes N fuel liquid storage devices 102, and the N fuel liquid storage devices

102 are connected with N turbine engines in one-to-one correspondence. Since each of the fuel

liquid storage devices 102 stores fuel liquid, the fuel liquid can be supplied to the corresponding

turbine fracturing apparatus A thereof

[0060] In the case that the turbine fracturing apparatus A is a turbine fracturing trailer, the fuel liquid storage device 102 can move along with the turbine fracturing trailer so as to

continuously supply fuel liquid to the turbine engine 100 while moving, which is more suitable

for the use of the turbine fracturing apparatus in different occasions.

[0061] Fig. 3 is a schematic diagram of a measurement and control apparatus provided

according to an embodiment of the present disclosure. The measurement and control apparatus

in Fig. 3 can be applied to both the turbine fracturing system in Fig. 1A and the turbine

fracturing system in Fig. 1B. Hereinafter, the measurement and control apparatus applied to the

turbine fracturing system of Fig. 1A will be described as an example.

[0062] For example, as shown in Figs. 1A and 3, the turbine fracturing system 1 further

includes a measurement and control apparatus 30. For example, the measurement and control

apparatus 30 includes a data acquisition device 110 and a data processing device 120. The data

acquisition device 110 is in signal connection with the fuel gas supply apparatus 10. The data

acquisition device 110 is configured to acquire first fuel gas data of the fuel gas and send the

first fuel gas data to the data processing device 120.

[0063] For example, one end of the data acquisition device 110 is connected with the fuel gas supply apparatus 10, and the other end is in signal connection with the data processing

device 120. In this way, the fuel gas output by the fuel gas supply apparatus 10 can be acquired

by the data acquisition device 110 in real time to generate the first fuel gas data, and then the

data acquisition device 110 sends the first fuel gas data as acquired to the data processing device

120.

[00641 For example, the first fuel gas data includes at least one of pressure and flow rate of the fuel gas. That is, the data acquisition device 110 may be configured to acquire only

the pressure of the fuel gas, or only the flow rate of the fuel gas, or both the pressure and the

flow rate. A person skilled in the art can determine the data type of the fuel gas to be acquired

according to actual needs, which is not specifically limited by the embodiments of the present

disclosure.

[00651 For example, the data acquisition device 110 includes a component for measuring the pressure of the fuel gas, such as a pressure sensor. In another example, the data

acquisition device 110 includes a component for measuring the flow rate of the fuel gas, such

as a gas flowmeter. It can be understood that the components for measuring the pressure or the

flow rate of the fuel gas are not specifically limited in the embodiments of this disclosure, and

any components that can realize the above-mentioned measurement function can be applied to

the embodiments of this application.

[0066] For example, as shown in Fig. 3, the data processing device 120 includes a

comparison and determination circuit 121 and a control circuit 122. The comparison and

determination circuit 121 is connected to the data acquisition device 110. The comparison and

determination circuit 121 is configured to compare the first fuel gas data with a first threshold

value and determine whether the first fuel gas data is smaller than the first threshold value. For

example, the first threshold value includes at least one of a first pressure threshold value

corresponding to the pressure and a first flow rate threshold value corresponding to the flow

rate.

[00671 For example, the comparison and determination circuit includes a comparison

circuit. Optionally, the comparison and determination circuit further includes an amplifier, a

filter, an analog-to-digital converter, etc., so as to better compare and process the fuel gas data

as acquired. For example, the control circuit includes a controller.

[0068] For example, in the case that the first fuel gas data is gas pressure, the

comparison and determination circuit 121 is configured to compare the gas pressure with a first

pressure threshold value. For example, in the case that the first fuel gas data is gas flow rate,

the comparison and determination circuit 121 is configured to compare the gas flow rate with

a first flow rate threshold value. For example, in the case that the first fuel gas data includes both gas pressure and gas flow rate, the comparison and determination circuit 121 is configured to compare the gas pressure with the first pressure threshold value and compare the gas flow rate with the first flow rate threshold value.

[00691 In this way, after comparing the first fuel gas data with thefirst threshold value, it can be determined whether the first fuel gas data is smaller than thefirst threshold value,

thereby confirming whether the flow rate or pressure of the fuel gas output from the fuel gas

supply apparatus 10 is decreased. In actual operation, because the accuracy of flow detection

may be better and more intuitive than that of pressure detection, it is preferable to set the first

fuel gas data as gas flow rate and compare the gas flow rate with thefirst gas threshold value.

[00701 For example, the first pressure threshold value includes 90% to 95% of a standard pressure, and the first flow rate threshold value includes 90% to 95% of a standard

flow rate. Further, the first pressure threshold value is 95% of the standard pressure, and the

first flow rate threshold value is 95% of the standard flow rate. In actual production, the

standard pressure and standard flow rate refer to design parameters of the pressure or flow rate

of the fuel gas adopted in the field of hydraulic fracturing. The first pressure threshold value

can be regarded as an alarm pressure range of the turbine fracturing apparatus. No matter

whether the pressure or the flow rate is utilized, if the lower limit of the threshold value is set

to be small (for example, 80%), it would cause a switching failure; and if the upper limit of the

threshold value is set to be great (for example, 98%), it would have no buffering space and may

cause frequent switching, which goes against a normal and stable operation of the apparatus.

Therefore, it is preferable to use 90% to 95% of the standard pressure as the gas pressure, and/or,

to use 90% to 95% of the standard flow rate as the gas flow rate.

[00711 For example, as shown in Fig. 3, the comparison and determination circuit 121 sends the comparison result to the control circuit 122. The control circuit 122 is in signal

connection with the comparison and determination circuit 121. The control circuit 122 is

configured to select at least one of the N turbine engines 100 and generate afirst fuel switching

signal in response to the first fuel gas data being smaller than thefirst threshold value. The first

fuel switching signal is used for switching the gaseous fuel of at least one of the N turbine

engines 100 to liquid fuel.

[0072] In case of a fuel gas supply shortage occurred in the well site, the data acquisition device 110 sends the first fuel gas data detected in real time to the comparison and determination circuit 121. Then, the comparison and determination circuit 121 sends the comparison result to the control circuit 122. The control circuit 122 automatically generates a first fuel switching signal for switching gaseous fuel to liquid fuel according to the comparison result (i.e., the first fuel gas data is smaller than thefirst threshold value), thereby further ensuring the normal operation of the turbine fracturing apparatus in the switching process and improving the operation safety of operators.

[0073] In the case where the first fuel gas data is the gas pressure, by way of example, if the gas pressure is smaller than thefirst pressure threshold value, the control circuit 122 selects one of the N turbine engines 100 (for example, the turbine engine 100 on the turbine fracturing apparatus Al) and generates a first fuel switching signal corresponding to the selected turbine engine 100. The first fuel switching signal is used for instructing the selected turbine engine 100 to switch from gaseous fuel to liquid fuel. It can be understood that the control circuit 122 can select two or more turbine engines 100 for fuel switching, and the embodiments of the present disclosure are not intended to limit the number of turbine engines 100 to be switched.

[0074] For example, as shown in Figs. 1A and 2, each of the turbine fracturing apparatuses A further includes a local control device 104. For example, the local control device 104 is arranged on the turbine fracturing apparatus A, one end of the local control device 104 is in signal connection with the data processing device 120 and the other end is in signal connection with the turbine engine 100.

[00751 For example, the control circuit 122 of the data processing device 120 is further configured to send the first fuel switching signal to the local control device 104 which is in signal connection with the at least one turbine engine 100 as selected.

[0076] For example, as shown in Fig. 3, the data processing device 120 further includes a communication circuit 123. The local control device 104 includes a local communication circuit 133, as shown in Fig. 2. The communication circuit 123 and the local communication circuit 133 can realize signal or data transmission there-between through wired or wireless communication. The wired communication includes but is not limited to Ethernet, serial communication, etc. The wireless communication includes but is not limited to infrared, bluetooth, WiFi, GPRS, ZigBee, RFID (radio frequency identification), 4G mobile communication, 5G mobile communication and other communication protocols.

[0077] In the case that the control circuit 122 of the measurement and control apparatus generates the first fuel switching signal, the measurement and control apparatus 30 can transmit the first fuel switching signal to the local control device 104 which is in signal connection with the selected turbine engine 100, by using the communication circuit 123 and the local communication circuit 133. The local control device 104 is configured to switch the gaseous fuel of the selected turbine engine 100 to liquid fuel according to the first fuel switching signal. Compared with the manual switching of gaseous fuel to liquid fuel by operators, the above-described process not only realizes automatic switching but also avoids apparatus shutdown, thereby ensuring the safety of operators and saving considerable manpower and material costs.

[0078] For example, as shown in Fig. 1A, each of the turbine fracturing apparatuses A is provided with the fuel liquid storage device 102; in order to control the supply of liquid fuel conveniently, the liquid fuel supplied to the selected turbine engine 100 can be provided by the fuel liquid storage device 102 on the same turbine fracturing apparatus A as the selected turbine engine 100, that is, by the fuel liquid storage device 102 connected to the selected turbine engine 100.

[00791 For example, as shown in Fig. 2, the local control device 104 further includes: a local control circuit 131 in signal connection with the local communication circuit 133; and a switching circuit 132 in signal connection with the local control circuit 131. The local control circuit 131 is configured to receive the first fuel switching signal and control the switching circuit 132 to realize switching from the gaseous fuel to the liquid fuel. For example, the switching circuit 132 includes a selector switch.

[0080] For example, as shown in Fig. 2, a first end E l of the switching circuit 132 is in signal connection with the local control circuit 131. A second end E2 and a third end E3 are respectively connected to the fuel liquid storage device 102 and the fuel gas delivery device 103 provided on the same turbine fracturing apparatus A. Under the control of the local control circuit 131, the switching circuit 132 can switch the fuel gas delivery device 103 to the fuel liquid storage device 102. In an example, the second end E2 and the third end E3 of the switching circuit 132 include a first control valve and a second control valve respectively connected to the fuel liquid storage device 102 and the fuel gas delivery device 103. By opening the first control valve and closing the second control valve at the same time, the fuel of the turbine engine can be switched from gaseous fuel to liquid fuel. For example, by gradually opening the first control valve and gradually closing the control valve, a smooth switching can be ensured, and the switching time lasts for about 15 seconds.

[0081] In the embodiment of the present disclosure, in order to allow the turbine fracturing apparatus to operate for a longer time after switching, when selecting a turbine

engine to be switched, the turbine engine with the longest operational time can be selected for

switching, thus further avoiding the shutdown of the turbine fracturing apparatus caused by

insufficient fuel supply after switching.

[0082] For example, the at least one turbine engine 100 as selected includes the turbine

engine 100 with the longest operational time. The turbine engine 100 with the longest

operational time satisfies at least one of the following three conditions: a) the current liquid

amount of liquid fuel stored in the turbine engine 100 is the largest; B) the load of the turbine

engine 100 is the smallest; and c) the ratio of the current liquid amount of liquid fuel stored in

the turbine engine 100 to the load of the turbine engine 100 is the highest.

[0083] In the well site, an "oil amount-load ratio" is a result of the current amount of

liquid oil being divided by the current load. If the oil amount-load ratio is relatively high, it

means that the apparatus can run for a long time under the current oil amount of liquid oil; on

the contrary, the running time is shorter. Therefore, among the above three conditions, it is

preferable to select the turbine engine 100 satisfying the condition c) for fuel switching.

[0084] As mentioned above, in the case that the first fuel gas data falls below the first threshold value due to insufficient fuel gas supply, the turbine engine on at least one turbine

fracturing apparatus can be selected to switch the fuel thereof from gaseous fuel to liquid fuel.

If the first fuel gas data continues to drop and drop speed is fast, the normal operation of the

turbine fracturing trailer group may not be guaranteed even if the fuel is switched to liquid fuel.

At this time, it is possible to adjust the total displacement of the turbine fracturing system 1.

The embodiment of the present disclosure also provides two ways of automatically adjusting

the displacement, which will be described separately below.

[00851 In another embodiment of the present disclosure, the data acquisition device 110 is further configured to acquire second fuel gas data of the fuel gas and send the second fuel gas data to the data processing device 120. For example, the second fuel gas data includes a change rate of the first fuel gas data. The comparison and determination circuit 121 is further configured to compare the second fuel gas data with a change rate threshold value and send a comparison result to the control circuit 122. The control circuit 122 is further configured to adjust the total displacement of the turbine fracturing system 1 according to the comparison result.

[0086] Generally, the total displacement of the turbine fracturing system refers to the preset displacement of the turbine fracturing trailer group. In the actual well site, the turbine fracturing trailer group includes N turbine fracturing apparatuses, so the preset displacement of the turbine fracturing trailer group is equal to the sum of the preset displacements of the N turbine fracturing apparatuses.

[00871 For example, the change rate of the first fuel gas data includes a reduction rate of the first fuel gas data, and the change rate threshold value includes a reduction rate threshold value of the first fuel gas data. The comparison and determination circuit 121 is further configured to compare the second fuel gas data with the reduction rate threshold value of the first fuel gas data, and determine whether the second fuel gas data is greater than or equal to the reduction rate threshold value of the first fuel gas data. For example, the reduction rate of the first fuel gas data includes at least one of a reduction rate of gas flow rate and a reduction rate of gas pressure.

[0088] For example, in the case that the second fuel gas data is greater than or equal to the reduction rate threshold value of the first fuel gas data, the control circuit 122 is further configured to generate a first displacement reduction signal for reducing the total displacement of the turbine fracturing system 1 in response to the second fuel gas data being greater than or equal to the reduction rate threshold value of the first fuel gas data. Then, the control circuit 122 sends the first displacement reduction signal to the local control device 104 on each of the turbine fracturing apparatuses A. The local control device 104 adjusts the displacement of the corresponding turbine fracturing apparatus, thereby reducing the total displacement of the turbine fracturing system 1.

[00891 In the above embodiments of the present disclosure, the turbine control system can automatically adjust the total displacement of the turbine fracturing system in real time according to the fuel gas supply status, thereby further ensuring the normal and stable operation of the turbine fracturing trailer group. For example, the total displacement of the turbine fracturing system refers to the preset displacement of the turbine fracturing system.

[0090] For example, in the case that the preset displacement decreases, the turbine fracturing system will redistribute the displacement of each of the turbine fracturing apparatuses in the turbine fracturing system according to the new preset displacement value. For example, the automatic allocation of the turbine fracturing system follows the principle of load balancing, that is, the displacement of the apparatus with higher load is preferentially reduced.

[0091] For example, the reduction rate threshold value includes a reduction rate preset value per unit time. In one example, the reduction rate threshold value is 5% to 15% of the reduction rate preset value per unit time, for example, 10%. For example, in the case that the reduction rate of gaseous fuel per unit time is higher than 10% of the preset value, the turbine control system will reduce the total displacement of the turbine fracturing system according to the reduction rate to prevent the sudden drop of the gas supply system from affecting the operation.

[0092] In another embodiment of the present disclosure, as shown in Fig. 1A, the data acquisition device 110 is in signal connection with each of the N fuel liquid storage devices 102. The data acquisition device 110 is further configured to acquire the current total liquid amount of liquid fuels stored in all the N fuel liquid storage devices 102 and send the current total liquid amount to the data processing device 120. As shown in Fig. 1A, for example, N fuel liquid storage devices 102 are arranged on the N turbine fracturing apparatuses A in one to-one correspondence, and are connected to the turbine engines 100 in one-to-one correspondence. The comparison and determination circuit 121 is further configured to compare the current total liquid amount with the total liquid amount threshold value, and determine whether the current total liquid amount is smaller than the total liquid amount threshold value. In the case that the current total liquid amount is smaller than the total liquid amount threshold value, the control circuit 122 is further configured to generate a second displacement reduction signal for reducing the total displacement of the turbine fracturing system 1 in response to the current total liquid amount being smaller than the total liquid amount threshold value.

[0093] In the above embodiments of the disclosure, the turbine control system can automatically adjust the total displacement of the turbine fracturing system in real time according to the current storage status of liquid fuel, thereby further ensuring the normal and stable operation of the turbine fracturing trailer group.

[0094] As described in the previous embodiments, in the case that the preset displacement is reduced, the turbine fracturing system will redistribute the displacement of each of the turbine fracturing apparatuses in the turbine fracturing system according to the new preset displacement value. For example, the automatic allocation of the turbine fracturing system follows the principle of load balancing, that is, the displacement of the apparatus with higher load is preferentially reduced.

[0095] In one example, the total liquid amount threshold value is 10% to 50% of the total liquid amount preset value, for example, 20%. For example, in the case that the current total liquid amount is smaller than 20% of the total liquid amount preset value, the turbine control system will reduce the total displacement of the turbine fracturing system to prevent the sudden drop of the gas supply system from affecting the operation.

[0096] The above embodiments describe the process that the turbine engine automatically switches from gaseous fuel to liquid fuel in the case that the gas supply status of fuel gas changes from sufficiency to insufficiency. In the case that the gas supply status of fuel gas changes from insufficiency to sufficiency, the turbine fracturing system of the embodiment of the present disclosure can also control the turbine engine to automatically switch from liquid fuel back to gaseous fuel.

[00971 In another embodiment of the present disclosure, the comparison and determination circuit 121 is further configured to determine whether a turbine engine 100 switched to the liquid fuel is existed, in response to the first fuel gas data being greater than or equal to the first threshold value. In the case that the turbine engine 100 switched to the liquid fuel is existed, the comparison and determination circuit 121 is further configured to determine whether the first fuel gas data is greater than or equal to a second threshold value in response to the turbine engine 100 switched to the liquid fuel being existed, wherein the second threshold value is greater than the first threshold value. The control circuit 122 is further configured to generate a second fuel switching signal for switching the liquid fuel of the turbine engine 100 back to the gaseous fuel in response to the first fuel gas data being greater than or equal to the second threshold value. For example, the second threshold value is approximately equal to the standard pressure or the standard flow rate.

[00981 In the above embodiments of the present disclosure, in the case that the gas supply status of fuel gas changes from insufficiency to sufficiency, the turbine fracturing system can control the turbine engine to automatically switch from liquid fuel back to gaseous fuel. It not only ensures the normal operation of the turbine fracturing apparatus but also improves the operation safety of operators and reduces the operation intensity.

[0099] For example, the control circuit 122 is further configured to obtain the total number M of the turbine engines 100 having been switched to the liquid fuel, wherein M is a positive integer smaller than N. The control circuit 122 is further configured to select the turbine engine 100 with the shortest operational time among the M turbine engines 100 and generate the second fuel switching signal for switching the liquid fuel of the turbine engine 100 with the shortest operable time back to gaseous fuel.

[00100] For example, the turbine engine 100 with the shortest operational time satisfies at least one of the following three conditions: al) the current liquid amount of liquid fuel stored in the turbine engine 100 is the smallest; BI) the load of the turbine engine 100 is the largest; and c I) the ratio of the current liquid amount of liquid fuel stored in the turbine engine 100 to the load of the turbine engine 100 is the lowest.

[00101] In the above process of switching from liquid fuel back to gaseous fuel, the turbine engine 100 with the shortest operational time is selected firstly for switching, which can make the switching process smoother and ensure that other apparatus(es) with higher oil amount-load ratio can work normally. In the case that the gas supply status of the fuel gas continues to be sufficient, other apparatus(es) can be further selected to switch the oil fuel as used, until all the turbine fracturing apparatuses are switched to gaseous fuel.

[00102] In one example, the turbine control system determines the gas supply status depending on the gas pressure. In the case that the gas pressure is lower than 95% of the standard pressure, the turbine control system automatically selects the apparatus with the highest oil amount-load ratio for fuel switching, that is, converting the gaseous fuel into liquid fuel. In the case that the gas pressure is higher than 10% of the standard pressure, which means that the current gas supply pressure is sufficient, the turbine fracturing system will select the apparatus with lowest oil amount-load ratio to switch the oil fuel, that is, switching the liquid fuel to gaseous fuel until it is all gaseous fuel.

[001031 In another example, the turbine control system determines the gas supply status depending on the gas flow rate. In the case that the gas flow rate is lower than 95% of the

standard flow rate, the turbine control system automatically selects the apparatus with the highest oil amount-load ratio for fuel switching, that is, converting gaseous fuel into liquid fuel. In the case that the gas flow rate is equal to or close to the standard flow rate, which means that the current gas supply pressure is sufficient, the turbine fracturing system will select the apparatus with lowest oil amount-load ratio to switch the oil fuel, that is, switching the liquid fuel to gaseous fuel until it is all gaseous fuel.

[00104] At least one embodiment of the present disclosure further provides a controlling method of a turbine fracturing system.

[00105] Fig. 4 is a flowchart of a controlling method of a turbine fracturing system provided according to an embodiment of the present disclosure. For example, as shown in Fig. 4, the controlling method of the turbine fracturing system includes:

[001061 Step SI, acquiring first fuel gas data of fuel gas, wherein the fuel gas is distributed to N turbine engines and used as gaseous fuel of the N turbine engines, and N is an integer greater than or equal to 2;

[001071 Step S2, determining whether at least one of a flow rate and a pressure of the fuel gas decreases according to the first fuel gas data; and

[00108] Step S3, supplying liquid fuel to at least one ofN turbine fracturing apparatuses in response to a decrease of the at least one of the flow rate and pressure of the fuel gas.

[00109] In the controlling method of the turbine fracturing system provided by the above embodiments, in the case that at least one of the flow rate and pressure of the fuel gas decreases, liquid fuel is supplied to at least one of the N turbine fracturing apparatuses. That is, in the case that the fuel gas supplied by the fuel gas supply apparatus is insufficient, the fuel liquid supply apparatus can be controlled to automatically supply liquid fuel to the turbine engine, so that the normal operation of the N turbine fracturing apparatuses can be ensured and the turbine fracturing system can maintain the normal displacement output. Moreover, because the switching from gaseous fuel to liquid fuel is automatically completed, the operation safety of operators is improved and the labor intensity of manual operation is reduced.

[00110] Fig. 5 is a flowchart of a controlling method of a turbine fracturing system provided according to another embodiment of the present disclosure. For example, as shown

in Fig. 5, the step S2 includes:

[00111] Step S201: comparing the first fuel gas data with a first threshold value, and determining whether the first fuel gas data is smaller than the first threshold value.

[00112] In this case, for example, the step S3 includes:

[00113] Step S301: selecting at least one of the N turbine engines, and switching the gaseous fuel of the at least one of the N turbine engines to liquid fuel, in response to the first

fuel gas data being smaller than the first threshold value.

[00114] For example, the first fuel gas data includes at least one of pressure and flow rate of the fuel gas, and thefirst threshold value includes at least one of afirst pressure threshold

value corresponding to the pressure and a first flow rate threshold value corresponding to the

flow rate.

[00115] In the embodiment of the present disclosure, the specific definition of the first

pressure threshold value and the first flow rate threshold value can refer to the relevant

description in the previous embodiment, and will not be repeated here.

[00116] Further, for example, step S301 includes:

[001171 Step S3011: selecting the turbine engine with the longest operational time among the N turbine engines, and switching the gaseous fuel of the turbine engine with the

longest operational time to the liquid fuel. For example, the turbine engine with the longest

amount of liquid fuel stored in the turbine engine is the largest; b) the load of the turbine engine

is the smallest; and c) the ratio of the current liquid amount of liquid fuel stored in the turbine

engine to the load of the turbine engine is the highest.

[00118] As mentioned above, in the case that the gas supply is insufficient and the first fuel gas data drops below the first threshold value, the turbine engine on at least one turbine fracturing apparatus can be selected to switch the fuel from gaseous fuel to liquid fuel. If the fuel gas continues to drop and the drop speed is fast, the normal operation of the turbine fracturing trailer group may not be guaranteed even if the fuel is switched to liquid fuel. At this time, it is possible to adjust the total displacement of the turbine fracturing system 1. The embodiment of the present disclosure also provides two ways of automatically adjusting the displacement, which will be described separately below.

[00119] For example, as shown in Fig. 5, the controlling method of the turbine fracturing system further includes:

[00120] Step S4, determining whether the gaseous fuels of all the N turbine engines are switched to liquid fuels.

[00121] Fig. 6 is a flowchart of a controlling method of a turbine fracturing system provided according to another embodiment of the present disclosure. For example, as shown in Fig. 6, the controlling method of the turbine fracturing system further includes:

[00122] Step S5, acquiring second fuel gas data of the fuel gas in response to the gaseous fuels of all the N turbine engines having been switched to liquid fuels, wherein the second fuel gas data includes a change rate of the first fuel gas data;

[00123] Step S6, comparing the second fuel gas data with a change rate threshold value; and

[00124] Step S7, adjusting a total displacement of the turbine fracturing system according to a comparison result.

[00125] For example, the change rate of the first fuel gas data includes a reduction rate of the first fuel gas data, and the change rate threshold value includes a reduction rate threshold value of the first fuel gas data.

[00126] In this case, as shown in Fig. 5, the step S6 includes:

[001271 Step S601, compare the second fuel gas data with the reduction rate threshold value of the first fuel gas data, and determining whether the second fuel gas data is greater than or equal to the reduction rate threshold value of the first fuel gas data.

[00128] In this case, as shown in Fig. 5, the step S7 includes:

[00129] Step S701, reducing the total displacement of the turbine fracturing system in response to the second fuel gas data being greater than or equal to the reduction rate threshold value of the first fuel gas data.

[001301 In the above embodiments of the present disclosure, the controlling method of the turbine control system can automatically adjust the total displacement of the turbine fracturing system in real time according to the gas supply status of the fuel gas, thereby further ensuring the normal and stable operation of the turbine fracturing trailer group.

[001311 Fig. 7 is a flowchart of a controlling method of a turbine fracturing system provided according to another embodiment of the present disclosure. For example, as shown in Fig. 7, the controlling method of the turbine fracturing system further includes:

[00132] Step S5', acquiring a current total liquid amount of liquid fuels stored in all the N turbine engines in response to the gaseous fuels of all the N turbine engines having switched to liquid fuels;

[00133] S6', comparing the current total liquid amount with a total liquid amount threshold value; and

[00134] S7', adjusting a total displacement of the turbine fracturing system according to a comparison result.

[00135] In this case, as shown in Fig. 5, the step S6' includes:

[00136] Step S611, comparing the current total liquid amount with a total liquid amount threshold value, and determining whether the current total liquid amount is smaller than the total liquid amount threshold value.

[001371 In this case, as shown in Fig. 5, the step S7' includes:

[00138] Step S711, reducing the total displacement of the turbine fracturing system in response to the current total liquid amount being smaller than the total liquid amount threshold value.

[00139] In the above embodiments of the present disclosure, the controlling method of the turbine fracturing system can automatically adjust the total displacement of the turbine fracturing system in real time according to the current storage status of the liquid fuel, thereby further ensuring the normal and stable operation of the turbine fracturing trailer group.

[00140] In the case that adjusting the total displacement of the turbine fracturing system by adopting any of the above-described ways, for example, as shown in Fig. 5, the controlling method further includes:

[00141] Step S8, redistributing a displacement of each of the turbine fracturing apparatuses in the turbine fracturing system according to a new preset displacement value. For the specific allocation mode, reference may be made to the description of the previous embodiments, which will not be repeated here.

[00142] The above embodiments describe the process that the turbine engine automatically switches from gaseous fuel to liquid fuel in the case that the gas supply status of the fuel gas changes from sufficiency to insufficiency. In the case that the gas supply status of the fuel gas changes from insufficiency to sufficiency, the turbine fracturing system of the embodiment of the present disclosure can also control the turbine engine to automatically switch from liquid fuel back to gaseous fuel.

[00143] For example, as shown in Fig. 5, the controlling method of the turbine fracturing system further includes:

[00144] Step S31, determining whether a turbine engine switched to the liquid fuel is existed, in response to the first fuel gas data being greater than or equal to the first threshold value;

[00145] Step S32, comparing the first fuel gas data and a second threshold value and determining whether the first fuel gas data is greater than or equal to the second threshold value, in response to the turbine engine switched to the liquid fuel being existed;

[00146] Step S33, switching the liquid fuel of the turbine engine back to the gaseous fuel in response to the first fuel gas data being greater than or equal to the second threshold value.

[001471 In the above embodiments of the disclosure, in the case that the gas supply status of the fuel gas changes from insufficiency to sufficiency, the controlling method of the turbine fracturing system can control the turbine engine to automatically switch from liquid fuel back to gaseous fuel. It not only ensures the normal operation of the turbine fracturing apparatus, but also improves the operation safety of operators and reduces the operation intensity.

[00148] Further, for example, the step S31 further includes:

[00149] acquiring the total number M of the turbine engine(s) having been switched to liquid fuel, wherein M is a positive integer smaller than N.

[00150] Further, for example, the step S33 includes:

[00151] selecting a turbine engine with the shortest operational time among the M turbine engines, and switching the liquid fuel of the turbine engine with the shortest operational

time back to gaseous fuel. For example, the turbine engine with the shortest operational time

satisfies at least one of the following three conditions: al) the current liquid amount of liquid

fuel stored in the turbine engine is the smallest; bI) the load of the turbine engine is the largest;

and c I) the ratio of the current liquid amount of liquid fuel stored in the turbine engine to the

load of the turbine engine is the lowest.

[00152] In the above process of switching from liquid fuel back to gaseous fuel, the turbine engine 100 with the shortest operational time is selected for switching, which can make

the switching process smoother and ensure that other apparatus(es) with higher oil amount

load ratio can work normally. In the case that the gas supply status of fuel gas continues to be

sufficient, other apparatus(es) can be selected to switch oil fuel as used until all the turbine

fracturing apparatuses are switched to gaseous fuel.

[001531 At least one embodiment of the present disclosure further provides a controlling apparatus, including:

[00154] a processor; and

[00155] a memory, wherein a computer-executable code is stored in the memory, and

the computer-executable code is configured to execute the controlling method of the turbine

fracturing system according to any of the previous embodiments when executed by the

processor.

[001561 Fig. 8 is a structural diagram of a controlling apparatus provided by at least one

embodiment of the present disclosure. For example, the controlling apparatus 400 of the turbine

fracturing system shown in Fig. 8 is suitable for implementing the controlling method of the

turbine fracturing system provided by the embodiment of the present disclosure. The

controlling apparatus 400 of the turbine fracturing system can be a terminal device such as a

personal computer, a notebook computer, a tablet computer and a mobile phone, and can also

be a workstation, a server, a cloud service and the like. It should be noted that the controlling

apparatus 400 of the turbine fracturing system shown in Fig. 8 is merely illustrative, and is not

intended to impact any limitation on the function(s) and application scope of the embodiments of the present disclosure.

[00157] As shown in Fig. 8, the controlling apparatus 400 of the turbine fracturing system may include a processing device (e.g., a central processor, a graphics processor, etc.) 410, which may execute various appropriate actions and processes according to a program stored in a read only memory (ROM) 420 or a program loaded from a storage device 480 into a random access memory (RAM) 430. In the RAM 430, various programs and data required for the operation of the controlling apparatus 400 of the turbine fracturing system are also stored. The processing device 410, the ROM 420, and the RAM 430 are connected to each other through a bus 440. An input/output (I/O) interface 450 is also connected to the bus 440.

[00158] Generally, the following devices can be connected to the I/O interface 450: an input device 460 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, and the like; an output device 470 including, for example, a liquid crystal display (LCD), a speaker, a vibrator and the like; a storage device 480 including, for example, a magnetic tape, a hard disk and the like; and a communication device 490. The communication device 490 may allow the controlling apparatus 400 of the turbine fracturing system to communicate with other electronic devices in a wired or wireless manner, to exchange data. Although Fig. 8 shows a controlling apparatus 400 of the turbine fracturing system including various devices, it should be understood that it is not required to implement or have all the illustrated devices, and the controlling apparatus 400 of the turbine fracturing system may alternatively implement or have more or fewer devices.

[00159] For example, according to an embodiment of the present disclosure, the controlling method of the above-described turbine fracturing system can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product including a computer program carried on a non-transient computer readable medium, and the computer program includes program codes for executing the above described controlling method of the turbine fracturing system. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 490, or installed from the storage device 480, or installed from the ROM 420. When the computer program is executed by the processing device 410, the functions defined in the controlling method of the turbine fracturing system provided by the embodiment of the present disclosure can be executed.

[001601 At least one embodiment of the present disclosure also provides a computer readable storage medium on which a computer executable code is stored, when executed by a processor, the computer executable code causes the processor to execute the controlling method of the turbine fracturing system described in any of the previous embodiments.

[001611 Fig. 9 is a schematic diagram of a storage medium provided according to an embodiment of the present disclosure. As shown in Fig. 9, a storage medium 500 stores a computer program executable code 501 non-temporarily. For example, when the computer program executable code 501 is executed by a computer, one or more steps in the controlling method of the turbine fracturing system according to the above can be executed.

[00162] For example, the storage medium 500 can be applied to the controlling apparatus 400 of the above-mentioned turbine fracturing system. For example, the storage medium 500 may be the memory 420 in the controlling apparatus 400 of the turbine fracturing system shown in Fig. 8. For example, the relevant description of the storage medium 500 can refer to the corresponding description of the memory 420 in the controlling apparatus 400 of the turbine fracturing system shown in Fig. 8, and will not be repeated here.

[00163] In the above embodiments of the present disclosure, the turbine fracturing system and the controlling method thereof, the controlling apparatus and the computer-readable storage medium have at least the following technical effects: 1) the fuel can be automatically switched by monitoring the gas supply status of the fuel gas, thus reducing the labor intensity of manual operation and ensuring operation safety; 2) the displacement of the turbine fracturing system can be adjusted more quickly, with low cost and high safety; 3) an automatic operation can be realized, and the problem of shutting down the entire trailer group caused by untimely switching can be avoided.

[00164] In the present disclosure, the following should be noted:

[00165] (1) The accompanying drawings involve only the structure(s) in connection with the embodiment(s) of the present disclosure, and other structure(s) can be referred to common design(s).

[00166] (2) In case of no conflict, features in one embodiment or in different embodiments can be combined as a new embodiment.

[001671 What is described above is related to the exemplary embodiments of the disclosure only, but the protection scope of the present disclosure is not limited to this. Any ordinary person skilled in the art can easily construct changes or substitutions within the technical scope disclosed in the present disclosure, and these changes or substitutions shall be encompassed by the protection scope of this disclosure. Accordingly, the protection scope of the disclosure should be defined by the accompanying claims.

Claims

WHAT IS CLAIMED IS:

1. A turbine fracturing system, comprising:

N turbine fracturing apparatuses, wherein each of the N turbine fracturing apparatuses

comprises a turbine engine, and N is an integer greater than or equal to 2;

a fuel gas supply apparatus connected to N turbine engines, wherein the fuel gas supply

as gaseous fuel; and

a fuel liquid supply apparatus connected to at least one of the N turbine engines and

configured to supply liquid fuel to at least one of the N turbine fracturing apparatuses in a case

that at least one of a flow rate and a pressure of the fuel gas decreases.

2. The turbine fracturing system according to claim 1, further comprising a measurement

and control apparatus, the measurement and control apparatus comprising a data acquisition

device and a data processing device, wherein:

the data acquisition device is in signal connection with the fuel gas supply apparatus, and

configured to acquire first fuel gas data of the fuel gas and send the first fuel gas data to the

data processing device; and

the data processing device comprises:

a comparison and determination circuit in signal connection with the data

acquisition device, wherein the comparison and determination circuit is configured to

compare the first fuel gas data with a first threshold value and determine whether the first

fuel gas data is smaller than the first threshold value; the first fuel gas data comprises the

at least one of the pressure and the flow rate of the fuel gas, and thefirst threshold value

comprises at least one of a first pressure threshold value corresponding to the pressure

and a first flow rate threshold value corresponding to the flow rate; and

a control circuit in signal connection with the comparison and determination circuit,

wherein the control circuit is configured to select the at least one of the N turbine engines

and generate a first fuel switching signal in response to the first fuel gas data being

smaller than the first threshold value; the first fuel switching signal is used for switching the gaseous fuel of the at least one of the N turbine engines into liquid fuel.

3. The turbine fracturing system according to claim 2, wherein:

the turbine fracturing system further comprises a fuel liquid storage device which is

arranged on the turbine fracturing apparatus and connected with the turbine engine, and the

fuel liquid supply apparatus supplies the liquid fuel to the at least one of the N turbine engines

through the fuel liquid storage device;

each of the N turbine fracturing apparatuses further comprises a local control device in

signal connection with the turbine engine;

the control circuit is further configured to send the first fuel switching signal to the local

control device which is in signal connection with the at least one of the N turbine engines as

selected; and

the local control device is configured to switch the gaseous fuel of the at least one of the

N turbine engines as selected to the liquid fuel according to the first fuel switching signal; the

liquid fuel is supplied by the fuel liquid storage device connected to the at least one of the N

turbine engines as selected.

4. The turbine fracturing system according to claim 3, wherein:

the turbine fracturing system further comprises a fuel gas delivery device connected with

the turbine engine, and the fuel gas supply apparatus supplies the gaseous fuel to the turbine

engine through the fuel gas delivery device;

the local control device comprises a local control circuit and a switching circuit;

the local control circuit is configured to receive the first fuel switching signal and control

the switching circuit to realize switching from the gaseous fuel to the liquid fuel;

the switching circuit is respectively connected to the fuel liquid storage device and the

fuel gas delivery device which are arranged on a same turbine fracturing apparatus, and is

configured to switch from the fuel gas delivery device to the fuel liquid storage device under a

control of the local control circuit.

5. The turbine fracturing system according to claim 2, wherein: the at least one of the N turbine engines as selected comprises a turbine engine with a longest operational time; the turbine engine with the longest operational time satisfies at least one of the following three conditions: a current liquid amount of the liquid fuel stored in the turbine engine is the largest; a load of the turbine engine is the smallest; and a ratio of the current liquid amount of the liquid fuel stored in the turbine engine to the load of the turbine engine is the highest.

6. The turbine fracturing system according to claim 2, wherein:

the data acquisition device is further configured to acquire second fuel gas data of the fuel

gas and send the second fuel gas data to the data processing device, and the second fuel gas

data comprises a change rate of the first fuel gas data;

the comparison and determination circuit is further configured to compare the second fuel

gas data with a change rate threshold value and send a comparison result to the control circuit;

and

the control circuit is further configured to adjust a total displacement of the turbine

fracturing system according to the comparison result.

7. The turbine fracturing system according to claim 6, wherein:

the change rate of the first fuel gas data comprises a reduction rate of the first fuel gas

data, and the change rate threshold value comprises a reduction rate threshold value of the first

fuel gas data;

gas data with the reduction rate threshold value of the first fuel gas data and determine whether

the second fuel gas data is greater than or equal to the reduction rate threshold value of the first

fuel gas data; and

the control circuit is further configured to generate a first displacement reduction signal

for reducing the total displacement of the turbine fracturing system in response to the second

fuel gas data being greater than or equal to the reduction rate threshold value of the first fuel

gas data.

8. The turbine fracturing system according to claim 2, wherein:

the fuel liquid supply apparatus comprises N fuel liquid storage devices which are

arranged on the N turbine fracturing apparatuses in one-to-one correspondence and connected

with the N turbine engines in one-to-one correspondence;

the data acquisition device is further configured to acquire a current total liquid amount

of the liquid fuels stored in all the N fuel liquid storage devices and send the current total liquid

amount to the data processing device;

the comparison and determination circuit is further configured to compare the current total

liquid amount with a total liquid amount threshold value and determine whether the current

total liquid amount is smaller than the total liquid amount threshold value; and

the control circuit is further configured to generate a second displacement reduction signal

for reducing the total displacement of the turbine fracturing system in response to the current

total liquid amount being smaller than the total liquid amount threshold value.

9. The turbine fracturing system according to any one of claims 2 to 8, wherein:

the comparison and determination circuit is further configured for:

determining whether a turbine engine having switched to the liquid fuel is existed,

in response to the first fuel gas data being greater than or equal to thefirst threshold value;

and

comparing the first fuel gas data and a second threshold value and determining

whether the first fuel gas data is greater than or equal to the second threshold value, in

response to the turbine engine having switched to the liquid fuel being existed, wherein

the second threshold value is greater than the first threshold value, and

the control circuit is further configured to generate a second fuel switching signal for

switching the liquid fuel of the turbine engine having switched to the liquid fuel back to the

gaseous fuel in response to the first fuel gas data being greater than or equal to the second

threshold value.

10. The turbine fracturing system according to claim 9, wherein: the control circuit is further configured to acquire a total number M of the turbine engines having switched to the liquid fuel, wherein M is a positive integer smaller than N; the control circuit is further configured to select a turbine engine with the shortest operational time among M turbine engines and generate the second fuel switching signal for switching the liquid fuel of the turbine engine with the shortest operational time back to the gaseous fuel; and the turbine engine with the shortest operational time satisfies at least one of the following three conditions: a current liquid amount of the liquid fuel stored in the turbine engine is the smallest; a load of the turbine engine is the largest; and a ratio of the current liquid amount of the liquid fuel stored in the turbine engine to the load of the turbine engine is the lowest.

11. A controlling method of a turbine fracturing system, comprising: acquiring first fuel gas data of fuel gas, wherein the fuel gas is distributed to N turbine engines and used as gaseous fuel of the N turbine engines, and N is an integer greater than or equal to 2; determining whether at least one of a flow rate and a pressure of the fuel gas decreases according to the first fuel gas data; and supplying liquid fuel to the at least one of the N turbine fracturing apparatuses in response to a decrease in the at least one of the flow rate and the pressure of the fuel gas.

12. The controlling method of the turbine fracturing system according to claim 11, wherein the determining whether the at least one of the flow rate and the pressure of the fuel gas decreases according to the first fuel gas data comprises: comparing the first fuel gas data with afirst threshold value, and determining whether the first fuel gas data is smaller than the first threshold value; the first fuel gas data comprises the at least one of the pressure and the flow rate of the fuel gas, and thefirst threshold value comprises at least one of afirst pressure threshold value corresponding to the pressure and a first flow rate threshold value corresponding to the flow rate; wherein the supplying the liquid fuel to the at least one of the N turbine fracturing apparatuses, in response to the decrease in the at least one of the flow rate and the pressure of the fuel gas comprises: selecting the at least one of the N turbine engines and switching the gaseous fuel of the at least one of the N turbine engines to the liquid fuel in response to the first fuel gas data being smaller than the first threshold value.

13. The controlling method of the turbine fracturing system according to claim 12,

wherein the selecting the at least one of the N turbine engines and the switching the

gaseous fuel of the at least one of the N turbine engines to the liquid fuel in response to the first

fuel gas data being smaller than thefirst threshold value comprises:

selecting a turbine engine with the longest operational time among the N turbine engines,

and switching the gaseous fuel of the turbine engine with the longest operational time to the

liquid fuel; wherein the turbine engine with the longest operational time satisfies at least one of the

following three conditions:

a current liquid amount of the liquid fuel stored in the turbine engine is the largest;

a load of the turbine engine is the smallest; and

a ratio of the current liquid amount of the liquid fuel stored in the turbine engine to the

load of the turbine engine is the highest.

14. The controlling method of the turbine fracturing system according to claim 11, further

comprising:

determining whether the gaseous fuels of all the N turbine engines are switched to liquid

fuels.

15. The controlling method of the turbine fracturing system according to claim 14, further

comprising:

acquiring second fuel gas data of the fuel gas in response to the gaseous fuels of all the N

turbine engines being switched to liquid fuels, wherein the second fuel gas data comprises a change rate of the first fuel gas data; comparing the second fuel gas data with a change rate threshold value; and adjusting a total displacement of the turbine fracturing system according to a comparison result.

16. The controlling method of the turbine fracturing system according to claim 15,

wherein the change rate of the first fuel gas data comprises a reduction rate of the first fuel

gas data, and the change rate threshold value comprises a reduction rate threshold value of the

first fuel gas data;

wherein the comparing the second fuel gas data with the change rate threshold value

comprises:

comparing the second fuel gas data with the reduction rate threshold value of the first fuel

gas data, and determining whether the second fuel gas data is greater than or equal to the

reduction rate threshold value of the first fuel gas data; and

wherein the adjusting the total displacement of the turbine fracturing system according to

the comparison result comprises:

reducing the total displacement of the turbine fracturing system in response to the second

gas data.

17. The controlling method of the turbine fracturing system according to claim 14, further

comprising:

acquiring a current total liquid amount of liquid fuels stored in all the N turbine engines

in response to the gaseous fuels of all the N turbine engines being switched to the liquid fuels;

comparing the current total liquid amount with a total liquid amount threshold value; and

adjusting the total displacement of the turbine fracturing system according to a

comparison result.

18. The controlling method of the turbine fracturing system according to claim 17,

wherein the comparing the current total liquid amount with the total liquid amount threshold value comprises: comparing the current total liquid amount with the total liquid amount threshold value, and determining whether the current total liquid amount is smaller than the total liquid amount threshold value; wherein the adjusting the total displacement of the turbine fracturing system according to the comparison result comprises: adjusting the total displacement of the turbine fracturing system according to the comparison result.

19. The controlling method of the turbine fracturing system according to claim 12, further

comprising:

determining whether a turbine engine having switched to the liquid fuel is existed, in

response to the first fuel gas data being greater than or equal to thefirst threshold value;

comparing the first fuel gas data and a second threshold value and determining whether

the first fuel gas data is greater than or equal to the second threshold value, in response to the

turbine engine having switched to the liquid fuel being existed, wherein the second threshold

value is greater than the first threshold value; and

switching the liquid fuel of the turbine engine having switched to the liquid fuel back to

the gaseous fuel in response to the first fuel gas data being greater than or equal to the second

threshold value.

20. A controlling apparatus, comprising:

a processor; and

a memory, wherein a computer-executable code is stored in the memory, and the

computer-executable code is configured to execute the controlling method of the turbine

fracturing system according to any one of claims 11 to 19 when executed by the processor.

21. A computer-readable storage medium stored with a computer-executable code,

wherein the computer-executable code causes a processor to execute the controlling method of

the turbine fracturing system according to any one of claims 11 to 19 when executed by the processor.