CN115234543A - Hydraulic monitoring system - Google Patents

Abstract

The invention provides a hydraulic monitoring system, comprising: the injection pump is connected with the oil tank, and the injection head motor is connected with the injection pump; the injection pump monitoring system comprises a first monitoring system and/or a second monitoring system, wherein the first monitoring system is used for monitoring the working condition of the injection pump, and the second monitoring system is used for monitoring the working condition of an injection head motor; and the control system, the first monitoring system and/or the second monitoring system are connected with the control system, so that the control system sends out corresponding instructions according to the signals monitored by the first monitoring system and/or the second monitoring system. Through the technical scheme provided by the invention, the technical problem that the fault of the hydraulic system is inconvenient to troubleshoot in the prior art can be solved.

Description

Hydraulic monitoring system

Technical Field

The invention relates to the technical field of coiled tubing operation hydraulic systems, in particular to a hydraulic monitoring system.

Background

At present, a coiled tubing machine in the prior art is a common operation device in an oil field at present, can complete various operations such as drilling, well repairing, well logging and the like, and is called a universal operation machine. The device mainly comprises a power part, a control part, a roller, an injection head, a well control part and the like. The completion and control of each action are mainly realized by a hydraulic system. The injection pump and the injection head hydraulic system are used for driving and controlling the operation of an injection head motor, are main driving mechanisms for the well entering and exiting of the oil pipe, and are one of the most important parts of the hydraulic system of the continuous oil pipe operating machine.

However, in the actual use process of the coiled tubing machine on site, because of more elements needing to be operated and more instruments needing to be observed, the coiled tubing machine is hung in the air by a crane during the operation of the injection head. Therefore, the fault of each element is inconvenient to remove, and great inconvenience is brought to the fault removal work.

Disclosure of Invention

The invention mainly aims to provide a hydraulic monitoring system to solve the technical problem that faults of a hydraulic system are inconvenient to check in the prior art.

In order to achieve the above object, the present invention provides a hydraulic pressure monitoring system including: the injection pump is connected with the oil tank, and the injection head motor is connected with the injection pump; the injection pump monitoring system comprises a first monitoring system and/or a second monitoring system, wherein the first monitoring system is used for monitoring the working condition of the injection pump, and the second monitoring system is used for monitoring the working condition of an injection head motor; and the control system, the first monitoring system and/or the second monitoring system are connected with the control system, so that the control system sends out corresponding instructions according to the signals monitored by the first monitoring system and/or the second monitoring system.

Further, the first monitoring system comprises: the first pressure sensor is arranged at an oil supplementing opening of the injection pump and used for detecting the pressure at the oil supplementing opening and sending a detected signal to the control system; when the pressure value detected by the first pressure sensor is smaller than a first preset pressure value, the control system sends out first instruction information; when the pressure value detected by the first pressure sensor is greater than or equal to a first preset pressure value and less than a second preset pressure value, the control system sends out second instruction information; the first preset pressure value is smaller than the second preset pressure value.

Further, the hydraulic monitoring system also comprises a first filter, and the first filter is connected with the injection pump; the first monitoring system further comprises: the first differential pressure signal transmitter is connected with the first filter and used for detecting a differential pressure signal of the first filter and transmitting the detected signal to the control system; when the differential pressure signal detected by the first differential pressure signal generator is greater than a third preset pressure value, the control system sends out third instruction information.

Further, the first monitoring system further comprises: the first temperature detection piece is arranged at an oil drainage port of the injection pump and used for detecting the temperature of the oil drainage port of the injection pump and sending a detected signal to the control system; when the temperature detected by the first temperature detection piece is greater than or equal to a first preset temperature, the control system sends out fourth instruction information; when the temperature detected by the first temperature detection piece is greater than or equal to a second preset temperature value and less than a first preset temperature value, the control system sends out fifth instruction information; wherein the first preset temperature is higher than the second preset temperature.

Further, the first monitoring system further comprises: the negative pressure sensor is arranged at an oil suction port of the injection pump and used for detecting the oil suction pressure at the oil suction port of the injection pump and sending a detected signal to the control system; when the pressure value detected by the negative pressure sensor is smaller than or equal to a fourth preset pressure value, the control system sends sixth instruction information; when the pressure value detected by the negative pressure sensor is greater than the fourth preset pressure value and less than the fifth preset pressure value, judging the size condition of the pressure value detected by the negative pressure sensor and the sixth preset pressure value; when the pressure value detected by the negative pressure sensor is smaller than a sixth preset pressure value, the control system sends seventh instruction information; when the pressure value detected by the negative pressure sensor is greater than or equal to a sixth preset pressure value, the control system sends eighth instruction information; the fourth preset pressure value is smaller than the fifth preset pressure value, and the sixth preset pressure value is larger than the fourth preset pressure value.

Further, the first monitoring system further comprises: and the second pressure sensor is arranged on the shuttle valve between the first communication port and the second communication port of the injection pump and is used for detecting the pressure of the shuttle valve and sending the detected signal to the control system.

Further, the injector head motor includes a first motor and a second motor; the first monitoring system further comprises: the third pressure sensor is arranged at a fourth communication port of the injection pump and used for detecting the pressure at the fourth communication port and transmitting a signal to the control system; the fourth pressure sensor is arranged at a fifth communication port of the injection pump and used for detecting the pressure at the fifth communication port and transmitting a signal to the control system; the second monitoring system further comprises: the first flow sensor and the second flow sensor are used for detecting the flow at two communication ports of the first motor and respectively transmitting detected signals to the control system; the third flow sensor and the fourth flow sensor are used for detecting the flow at the two communication ports of the second motor and respectively transmitting the detected signals to the control system; the control system monitors the volumetric efficiency of the injection pump according to signals detected by the third pressure sensor, the fourth pressure sensor, the first flow sensor, the second flow sensor, the third flow sensor and the fourth flow sensor; and when the volumetric efficiency of the injection pump is smaller than the preset volumetric efficiency, the control system sends ninth command information.

Further, the control system judges the loop state of the injection pump according to the signal detected by the third pressure sensor and the signal detected by the fourth pressure sensor and calculates the theoretical discharge capacity of the injection pump; the control system calculates the actual flow of the injection pump according to the loop state of the injection pump, the signal detected by the first flow sensor, the signal detected by the second flow sensor, the signal detected by the third flow sensor and the signal detected by the fourth flow sensor; the control system calculates the rotating speed of the injection pump according to the rotating speed of the engine, the speed ratio of the power takeoff and the speed ratio of the transfer case; when the loop state of the injection pump is in a well outlet state, the control system calculates the volumetric efficiency of the injection pump according to the well outlet flow of the injection pump, the rotating speed of the injection pump, the actual flow of the injection pump and the theoretical displacement of the injection pump; and when the loop state of the injection pump is the well inlet state, the control system calculates the volumetric efficiency of the injection pump according to the well inlet flow of the injection pump, the rotating speed of the injection pump, the actual flow of the injection pump and the theoretical displacement of the injection pump.

Further, the second monitoring system further comprises: the second temperature detection piece is arranged at an oil drain port of the injection head motor and is used for detecting a temperature value at the oil drain port of the injection head motor and transmitting a signal to the control system; and when the temperature value detected by the second temperature detection piece is greater than a third preset temperature value, the control system sends tenth instruction information.

Further, the second monitoring system further comprises: the rotating speed sensor is arranged at a chain wheel of the injection head motor and is used for detecting the rotating speed of the chain wheel and transmitting a signal to the control system; the control system calculates the rotating speed of the injection head according to the rotating speed value detected by the rotating speed sensor and the speed ratio of the speed reducer; and when the rotating speed of the injection head is greater than the preset rotating speed, the control system sends eleventh instruction information.

Further, the second monitoring system further comprises: the fifth pressure sensor is arranged at the switching communication port of the injection head motor and used for detecting the pressure value at the switching communication port of the injection head motor and transmitting a signal to the control system; when the pressure value detected by the fifth pressure sensor is greater than or equal to a seventh preset pressure value and less than or equal to an eighth preset pressure value, the control system calculates the displacement of the injection head motor according to the pressure value detected by the fifth pressure sensor; and when the pressure value detected by the fifth pressure sensor is greater than an eighth preset pressure value, the control system calculates the displacement of the injection head motor according to the eighth preset pressure value.

Further, the injector head motor includes a first motor and a second motor; the second monitoring system further comprises: the first flow sensor and the second flow sensor are used for detecting the flow at two communication ports of the first motor and respectively transmitting detected signals to the control system; the third flow sensor and the fourth flow sensor are used for detecting the flow at the two communication ports of the second motor and respectively transmitting the detected signals to the control system; the control system calculates the volumetric efficiency of the first motor by taking the flow of the inlet of the first motor as a first theoretical flow and the flow of the outlet of the first motor as a first actual flow; or the control system calculates to obtain a first theoretical flow according to the rotating speed of the first motor and the displacement of the first motor, obtains a first actual flow according to the well inlet and outlet states of the first motor and the data detected by the first flow sensor, the second flow sensor, the third flow sensor and the third flow sensor, and calculates the volumetric efficiency of the first motor according to the first theoretical flow and the first actual flow; and/or the control system calculates the volumetric efficiency of the second motor by taking the flow of the inlet of the second motor as a second theoretical flow and the flow of the outlet of the second motor as a second actual flow; or the control system calculates a second theoretical flow according to the rotating speed of the second motor and the displacement of the second motor, obtains a second actual flow according to the well inlet and outlet states of the second motor and the data detected by the first flow sensor, the second flow sensor, the third flow sensor and the third flow sensor, and calculates the volumetric efficiency of the first motor according to the second theoretical flow and the second actual flow.

Further, when the calculated volumetric efficiency of the first motor is lower than the preset volumetric efficiency value, the control system sends twelfth command information; and/or when the calculated volumetric efficiency of the second motor is lower than the preset volumetric efficiency value, the control system sends thirteenth command information.

Further, the hydraulic monitoring system further comprises: and the third monitoring system is used for monitoring the working condition of the oil tank so that the control system sends out a corresponding instruction according to a signal detected by the third monitoring system.

By applying the technical scheme of the invention, the control system can conveniently monitor the working condition of the injection pump according to the signal condition monitored by the first monitoring system and send out a corresponding prompt instruction according to the monitoring condition so as to conveniently troubleshoot the injection pump; the control system can be convenient for monitor the working condition of the injection head motor according to the signal condition monitored by the second monitoring system and send out a corresponding prompt instruction according to the monitoring condition so as to conveniently carry out corresponding troubleshooting on the injection head motor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a schematic diagram of a hydraulic monitoring system provided in accordance with an embodiment of the present invention;

FIG. 2 illustrates a detection logic diagram of a filter provided in accordance with an embodiment of the present invention;

FIG. 3 illustrates a logic diagram for infusion pump temperature monitoring provided in accordance with an embodiment of the present invention;

FIG. 4 illustrates a logic diagram of a control system according to a signal of the suction pressure of the injection pump according to an embodiment of the present invention;

FIG. 5 illustrates a logic diagram for the control system to calculate the rotational speed of the infusion pump provided in accordance with an embodiment of the present invention;

FIG. 6 illustrates a logic diagram of a control system according to a signal of a temperature of the first motor provided in accordance with an embodiment of the present invention;

FIG. 7 illustrates a logic diagram of a control system according to a signal of a temperature of the second motor provided in accordance with an embodiment of the present invention;

FIG. 8 illustrates a logic diagram of a control system according to a signal indicative of a rotational speed of an injector head motor, provided in accordance with an embodiment of the present invention;

FIG. 9 illustrates a logic diagram for a control system monitoring displacement of a fill head motor provided in accordance with an embodiment of the present invention;

FIG. 10 illustrates a logic diagram for the control system to calculate the efficiency of the first motor provided in accordance with an embodiment of the present invention;

FIG. 11 illustrates a logic diagram for the control system to calculate the efficiency of the second motor provided in accordance with an embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 11, an embodiment of the present invention provides a hydraulic monitoring system including a filling pump, a filling head motor, a tank, and a control system, the filling pump being connected to the tank, and the filling head motor being connected to the filling pump. The hydraulic monitoring system in this embodiment further includes a first monitoring system, or a second monitoring system, or a first monitoring system and a second monitoring system, where the first monitoring system is configured to monitor a working condition of the injection pump, and the second monitoring system is configured to monitor a working condition of the injection head motor. The first monitoring system and/or the second monitoring system are connected with the control system, so that the control system sends out corresponding prompt instructions according to signals monitored by the first monitoring system and/or the second monitoring system.

By adopting the hydraulic monitoring system provided by the embodiment, the control system can conveniently monitor the working condition of the injection pump according to the signal condition monitored by the first monitoring system and send out a corresponding prompt instruction according to the monitoring condition so as to conveniently carry out troubleshooting on the injection pump; the control system can be convenient for monitor the working condition of the injection head motor according to the signal condition monitored by the second monitoring system and send out a corresponding prompt instruction according to the monitoring condition so as to conveniently carry out corresponding troubleshooting on the injection head motor. Therefore, by adopting the hydraulic monitoring system provided by the embodiment, the fault of the hydraulic system can be conveniently checked.

Specifically, the hydraulic monitoring system in the embodiment is mainly used for coiled tubing operation.

In this embodiment, the first monitoring system includes a first pressure sensor, the first pressure sensor is disposed at an oil filling port of the injection pump, and the first pressure sensor is configured to detect a pressure at the oil filling port and send a detected signal to the control system; when the pressure value detected by the first pressure sensor is smaller than a first preset pressure value, the control system sends first instruction information, and specifically, the first instruction information is an instruction of 'damage of an oil replenishing pump'; when the pressure value detected by the first pressure sensor is greater than or equal to a first preset pressure value and less than a second preset pressure value, the control system sends out second instruction information, and specifically, the second instruction information is an instruction of 'abnormal oil supply pump state'; the first preset pressure value is smaller than the second preset pressure value. By adopting the arrangement, the working state of the oil replenishing pump can be conveniently and rapidly judged, and related investigation and maintenance work can be rapidly carried out by workers according to corresponding instructions.

Specifically, the above process corresponds to an injection pump oil supply pressure monitoring process: the measured data of a pressure sensor 03-4 (namely a first pressure sensor) arranged at the port M3 of the injection pump is transmitted into a control system, and when the measured data is lower than a B value (a first preset pressure value), a display screen pops up a window to prompt that the oil replenishing pump is damaged and the shutdown is recommended; when the value is larger than or equal to the value B and smaller than the value C (a second preset pressure value), the system judges that the state of the oil supplementing pump is abnormal and links the injection head motor efficiency, the filling filter blockage and the injection pump efficiency alarm, and provides judgment parameters for alarm. And B and C values are determined according to specifically selected elements and tests of the equipment, and data are set after the equipment is debugged before leaving the factory.

In this embodiment, the hydraulic monitoring system further includes a first filter, the first filter being connected to the charge pump; the first monitoring system further comprises a first differential pressure signal transmitter, the first differential pressure signal transmitter is connected with the first filter, and the first differential pressure signal transmitter is used for detecting a differential pressure signal of the first filter and transmitting the detected signal to the control system; when the differential pressure signal detected by the first differential pressure transmitter is greater than a third preset pressure value, the control system transmits third instruction information, specifically, the third instruction information is an 'abnormal blockage' instruction. By adopting the arrangement, whether the first filter is blocked or not can be judged conveniently and rapidly.

Specifically, the first filter has two, namely a first injection pump filter and a second injection pump filter; the first pressure difference signal transmitters are two, namely a pressure difference signal transmitter 04-2 and a pressure difference signal transmitter 04-3. Wherein the monitoring process of the first infusion pump filter is: when the differential pressure signal transmitter 04-2 arranged on the first injection pump filter is used for measurement, and an electric signal is transmitted into the control system by the differential pressure signal transmitter of the filter, and the numerical value of the hydraulic oil temperature sensor 01-1 is larger than D (a third preset pressure value), a display screen popup window prompts that the first injection pump filter is blocked and a filter element needs to be replaced. And D value is determined according to the specifically selected elements and tests of the equipment, and the set data is debugged before the equipment leaves the factory.

The monitoring process of the second infusion pump filter is as follows: the pressure difference signal generator 04-3 arranged on the filter of the second injection pump is used for measuring, when an electric signal is transmitted into the control system by the filter pressure difference signal generator and the numerical value of the hydraulic oil temperature sensor 01-1 is larger than D, a display screen pop-up window prompts that the filter of the second injection pump is blocked and the filter element is required to be replaced. And D value is determined according to the specifically selected elements and tests of the equipment, and the set data is debugged before the equipment leaves the factory.

Specifically, the present embodiment further includes a perfusion filter, and the perfusion filter monitoring process includes the following steps: the pressure difference signal generator 04-1 arranged on the perfusion filter is used for measuring, when an electric signal is transmitted into the control system by the filter pressure difference signal generator and the numerical value of the hydraulic oil temperature sensor 01-1 is larger than D (a third preset pressure value), a display screen pop-up window prompts that the perfusion filter is blocked and a filter element is required to be replaced. And D value is determined according to the specifically selected elements and tests of the equipment, and the set data is debugged before the equipment leaves the factory.

In this embodiment, the first monitoring system further includes a first temperature detection element, the first temperature detection element is disposed at the oil drain port of the injection pump, and the first temperature detection element is configured to detect a temperature at the oil drain port of the injection pump and send a detected signal to the control system; when the temperature detected by the first temperature detection piece is greater than or equal to a first preset temperature, the control system sends fourth instruction information, and specifically, the fourth instruction information is an instruction of 'shutdown inspection'; when the temperature detected by the first temperature detection piece is greater than or equal to a second preset temperature value and less than a first preset temperature value, the control system sends out fifth instruction information, and specifically, the fifth instruction information is an instruction of 'damage to the injection pump'; the first preset temperature is higher than the second preset temperature. Adopt such setting, can be convenient for through the working condition to the detection snap judgments filling pump of temperature value to send corresponding instruction according to concrete working condition, so that carry out troubleshooting.

Specifically, the temperature monitoring process of the injection pump is as follows: the measured data of a temperature sensor 01-2 (namely a first temperature detection part) arranged at an oil drainage port of the injection pump is transmitted into the control system, and when the measured data is higher than E (a first preset temperature), a display screen pops up a window to prompt that the temperature of the injection pump is too high and the injection pump is required to be stopped for inspection. When the temperature is between F (second preset temperature) and E, the system judges that the injection pump is high in temperature, and the display screen pops the window to prompt that the injection pump is damaged. And linking an oil temperature alarm to provide judgment parameters for the oil temperature alarm. E. And F value is determined according to the specifically selected elements and tests of the equipment, and the data is set after the equipment is debugged before leaving factory.

In this embodiment, the first monitoring system further includes a negative pressure sensor, the negative pressure sensor is disposed at the oil suction port of the injection pump, and the negative pressure sensor is configured to detect an oil suction pressure at the oil suction port of the injection pump and send a detected signal to the control system; when the pressure value detected by the negative pressure sensor is smaller than or equal to a fourth preset pressure value, the control system sends sixth instruction information, specifically, the sixth instruction information is an instruction of detecting whether the oil suction butterfly valve is opened; when the pressure value detected by the negative pressure sensor is greater than the fourth preset pressure value and less than the fifth preset pressure value, judging the size condition of the pressure value detected by the negative pressure sensor and the sixth preset pressure value; when the pressure value detected by the negative pressure sensor is smaller than a sixth preset pressure value, the control system sends seventh instruction information, specifically, the seventh instruction information is an instruction of 'suggesting heating of hydraulic oil'; when the pressure value detected by the negative pressure sensor is greater than or equal to a sixth preset pressure value, the control system sends eighth instruction information, specifically, the eighth instruction information is an instruction of 'please replace the oil absorption filter element'; the fourth preset pressure value is smaller than the fifth preset pressure value, and the sixth preset pressure value is larger than the fourth preset pressure value. By adopting the arrangement, the corresponding prompt operation can be conveniently carried out according to the negative pressure condition, and the fault removal and the corresponding operation are conveniently carried out.

Specifically, the injection pump oil pumping pressure monitoring process comprises the following steps: the negative pressure sensor 03-1 arranged at the oil pumping port of the injection pump measures data and transmits the data into the control system, and when the data is smaller than G (a fourth preset pressure value), the display screen pops the window to prompt that whether the oil suction butterfly valve is opened or not is checked. When the value is larger than G and smaller than H (a fifth preset pressure value), and when the oil temperature is lower than J, the oil absorption resistance is large due to low hydraulic oil temperature, and a display screen pops a window to prompt that the hydraulic oil is recommended to be heated; when the oil temperature is higher than the value J (the sixth preset pressure value), the system judges that the oil absorption filter is blocked, and the display screen pops the window to prompt that the oil absorption filter core is required to be replaced. G. And H and J values are determined according to specifically selected elements and tests of the equipment, and data are set after the equipment is debugged before leaving a factory.

In this embodiment, the first monitoring system further includes a second pressure sensor (i.e., the pressure sensor 03-5) disposed on the shuttle valve between the first communication port and the second communication port of the injection pump, and the second pressure sensor is configured to detect a pressure level of the shuttle valve and send a detected signal to the control system. By adopting the arrangement, the pressure of the lock valve can be monitored conveniently, and troubleshooting and maintenance operations are facilitated.

Specifically, the above process corresponds to an injection head driving pressure monitoring process, and specifically includes: data measured by a pressure sensor at the shuttle valve 2 port between the injection pump M1 port (first communication port) and the M2 port (second communication port) is transmitted to the control system for recording.

In this embodiment, the temperature sensor 01-1 is used to detect the temperature of the hydraulic oil tank, the temperature sensor 01-2 is used to detect the temperature at the oil outlet of the injection pump, the temperature sensor 01-3 is used to detect the temperature at the oil outlet of the first motor, and the temperature sensor 01-4 is used to detect the temperature at the oil outlet of the second motor. The level sensor 02 is used to detect the level of the hydraulic tank. The negative pressure sensor 03-1 is arranged at an oil suction port of the injection head, the pressure sensor 03-2 is arranged at a port M4 of the injection pump, the pressure sensor 03-3 is arranged at a port M5 of the injection pump, the pressure sensor 03-4 is arranged at a port M3 of the injection pump, the pressure sensor 03-5 is arranged at a port 2 of the shuttle valve between the port M1 and the port M2 of the injection pump, and the pressure sensor 03-6 is arranged at a port X of the injection head motor. The differential pressure signal generator 04-1 is arranged at the filling filter of the filling pump, the differential pressure signal generator 04-2 is arranged at the first high-pressure filter of the filling pump, the differential pressure signal generator 04-3 is arranged at the second high-pressure filter of the filling pump, the differential pressure signal generator 04-4 is arranged at the first filling head filter, and the differential pressure signal generator 04-5 is arranged at the second filling head filter. The particle size monitor 05 is arranged at the oil return manifold. The flow meter 06-1 is disposed at port a of the first motor, the flow meter 06-2 is disposed at port B of the first motor, the flow meter 06-3 is disposed at port a of the second motor, and the flow meter 06-4 is disposed at port B of the second motor. The rotating speed sensor 07-1 is arranged at the chain wheel corresponding to the first motor, and the rotating speed sensor 07-2 is arranged at the chain wheel corresponding to the second motor.

In this embodiment, the injector head motor includes a first motor and a second motor; the first monitoring system further comprises: the third pressure sensor (namely the pressure sensor 03-2) is arranged at a fourth communication port (namely the port M4) of the injection pump, and the third pressure sensor is used for detecting the pressure at the fourth communication port and transmitting a signal to the control system; the fourth pressure sensor is arranged at a fifth communication port of the injection pump, and the fourth pressure sensor (namely the pressure sensor 03-3) is used for detecting the pressure at the fifth communication port (namely the M5 port) and transmitting a signal to the control system; the second monitoring system further comprises: the flow meter comprises a first flow sensor, a second flow sensor, a third flow sensor and a fourth flow sensor, wherein the first flow sensor (namely, the flow meter 06-1) and the second flow sensor (namely, the flow meter 06-2) are used for detecting the flow at two communication ports of a first motor (namely, a port A of the first motor and a port B of the first motor) and respectively transmitting detected signals to a control system; the third flow sensor (namely the flow meter 06-3) and the fourth flow sensor (namely the flow meter 06-4) are used for detecting the flow at the two communication ports (namely the port A of the second motor and the port B of the second motor) of the second motor and respectively transmitting the detected signals to the control system; the control system monitors the volumetric efficiency of the injection pump according to signals detected by the third pressure sensor, the fourth pressure sensor, the first flow sensor, the second flow sensor, the third flow sensor and the fourth flow sensor; when the volumetric efficiency of the injection pump is less than the preset volumetric efficiency, the control system sends ninth instruction information, specifically, the ninth instruction information is an "injection pump replacement" instruction. By adopting the arrangement, the volumetric efficiency of the injection pump can be conveniently monitored through the control system, and corresponding fault judgment and maintenance can be carried out according to the monitoring result.

Specifically, the control system judges the loop state of the injection pump according to a signal detected by the third pressure sensor and a signal detected by the fourth pressure sensor and calculates the theoretical discharge capacity of the injection pump; the control system calculates the actual flow of the injection pump according to the loop state of the injection pump, the signal detected by the first flow sensor, the signal detected by the second flow sensor, the signal detected by the third flow sensor and the signal detected by the fourth flow sensor; the control system calculates the rotating speed of the injection pump according to the rotating speed of the engine, the speed ratio of the power takeoff and the speed ratio of the transfer case; when the loop state of the injection pump is the well outlet state, the control system calculates the volumetric efficiency of the injection pump according to the well outlet flow of the injection pump, the rotating speed of the injection pump, the actual flow of the injection pump and the theoretical displacement of the injection pump; when the loop state of the injection pump is in a well-entering state, the control system calculates the volumetric efficiency of the injection pump according to the well-entering flow of the injection pump, the rotating speed of the injection pump, the actual flow of the injection pump and the theoretical displacement of the injection pump. With such an arrangement, the calculation accuracy of the volumetric efficiency of the infusion pump can be facilitated to be improved.

Specifically, the process corresponds to a process for monitoring the volumetric efficiency of the injection pump, and the method specifically comprises the following steps: the injection pump is completed by a pressure sensor 03-2 arranged at a port of an injection pump M4, a pressure sensor 03-3 arranged at a port M5, flow sensors arranged at a port A of a first motor, a port B of the first motor, a port A of a second motor and a port B of the second motor, the injection pump is combined with the rotation speed of an engine, and the like.

The first step is as follows: and (4) judging the state of the injection pump loop according to the value of the pressure sensor 03-3 at the M5 port minus the value of the pressure sensor 03-2 at the M4 port, wherein the injection pump loop is out of the well when the value is a positive value, and the injection pump loop is in the well when the value is a negative value.

The second step: and calculating the displacement of the injection pump according to the values of the pressure sensors of the ports M4 and M5. The formula is as follows:

wherein the values of M5 and M4 are measured by sensors, 250 and P _{Initial value of servo control} 、ΔP _{Servo control} Are determined by the system component configuration.

The third step: and calculating the actual output flow of the injection pump. When the injection pump is in a well outlet state, the actual output flow of the injection pump is equal to the sum of the flow sensor values of the port A of the first motor and the port B of the first motor; when the well enters the well, the actual output flow of the injection pump is equal to the sum of the flow sensor values of the port B of the second motor and the port A of the second motor;

the fourth step: the rotational speed of the infusion pump is calculated. The value is equal to the product of the engine speed, the power take-off speed ratio and the transfer case speed ratio, wherein the engine speed is provided by a sensor of the engine, the power take-off speed ratio and the transfer case speed ratio are determined by system configuration, and writing is carried out before equipment testing.

The fifth step: the volumetric efficiency of the infusion pump was calculated.

The volumetric efficiency of the infusion pump is equal to the actual output flow of the pump compared to the theoretical output flow.

Volumetric efficiency eta when the injection pump is in the out-of-well condition _V The calculation formula of (a) is as follows:

η _V ＝1000×Q _{pump-out well} /n _{Pump speed} V _{Pump-out well} ；

Wherein Q is _{Pump-out well} Flow out of the well for injection, n _{Pump speed} For the rotational speed of the injection pump, V _{Pump-out well} The displacement of the pump out of the well for injection;

solvent efficiency η when the injection pump is in the well-in state _V The calculation formula of (a) is as follows:

η _V ＝1000×Q _{pumping into well} /n _{Pump speed} V _{Pumping into well} ；

Wherein Q _{Pumping into well} For the flow rate of the injection pump into the well, n _{Pump rotational speed} For the rotational speed of the injection pump, V _{Well pumping} The displacement of the injection pump into the well;

when calculated the solvent efficiency eta _V When the volume efficiency is less than J (preset volume efficiency), the system judges that the injection pump efficiency is low, and a display screen pops up a window to prompt that the injection pump needs to be replaced. Specifically, the J value is determined according to components and tests specifically selected for the device, and the data is set after the device is debugged before the device leaves the factory.

In this embodiment, the second monitoring system further includes a second temperature detecting element, the second temperature detecting element is disposed at the oil drain of the injector motor, and the second temperature detecting element is configured to detect a temperature value at the oil drain of the injector motor and transmit a signal to the control system; when the temperature value detected by the second temperature detection piece is greater than a third preset temperature value, the control system sends tenth instruction information, specifically, the tenth instruction information is an instruction of 'damage to the injection head motor'. By adopting the arrangement, troubleshooting and prompting can be conveniently carried out on the injection head motor.

Specifically, the above process corresponds to a process of monitoring the temperature of the injector head motor, and the specific process is as follows: the measured data of the temperature sensors arranged at the oil discharge port of the first motor (the oil discharge port of the first motor is the L port of the first motor) and the oil discharge port of the second motor (the oil discharge port of the second motor is the L port of the second motor) are transmitted into the control system.

When the measured temperature value of the first motor is larger than the K value (a third preset temperature value), the system judges that the first motor is damaged, and the display screen pops the window to prompt that the injection head motor is damaged and is to be checked. Meanwhile, the oil temperature is high, and the rotating speed of the injection head is alarmed, so that judgment parameters are provided for the oil temperature and the rotating speed of the injection head. When the measured temperature value at the second motor is larger than the K value (a third preset temperature value), the system judges that the second motor is damaged, and the display screen pops the window to prompt that the injection head motor is damaged and is to be checked. Meanwhile, the oil temperature is high, and the rotating speed of the injection head is alarmed, so that judgment parameters are provided for the oil temperature and the rotating speed of the injection head. The K value is determined according to the specifically selected elements and tests of the equipment, and the data is set after the equipment is debugged before leaving the factory.

In this embodiment, the second monitoring system further comprises a rotation speed sensor disposed at the sprocket of the injector head motor, the rotation speed sensor being configured to detect a rotation speed of the sprocket and transmit a signal to the control system; the control system calculates the rotating speed of the injection head according to the rotating speed value detected by the rotating speed sensor and the speed ratio of the speed reducer; and when the rotating speed of the injection head is greater than the preset rotating speed, the control system sends eleventh instruction information, specifically, the eleventh instruction information is an instruction of 'rotational speed overspeed of the injection head'. By adopting the arrangement, the rotating speed of the injection head can be monitored conveniently, and the adjustment of adaptability is facilitated.

Specifically, the above process corresponds to a process of monitoring the rotational speed of the injector motor, and the specific process is as follows: the measurement data of the rotation speed sensor arranged on the chain wheel corresponding to the first motor and the measurement data of the rotation speed sensor arranged on the chain wheel corresponding to the second motor are transmitted into the system, and the calculation is carried out by combining the inherent speed ratio of the injection head motor (wherein, the first motor is correspondingly connected with the first speed reducer, and the second motor is correspondingly connected with the second speed reducer). When the speed of the injection head is equal to the product of the rotating speed of the chain wheel and the speed ratio of the speed reducer, and the numerical value of the injection head is higher than the L value (preset rotating speed value), the system judges that the motor of the injection head is overspeed, and the display screen pops the window to prompt that the rotating speed of the injection head is required to be reduced. And simultaneously recording the rotating speed value and judging the well entering and exiting state, wherein the well entering state is determined when the sensor value is a positive value, and the well exiting state is determined when the sensor value is a negative value. And the L value is determined according to the specifically selected elements and tests of the equipment, and the data is set after the equipment is debugged before leaving the factory.

In this embodiment, the second monitoring system further comprises a fifth pressure sensor disposed at the switching communication port of the injector head motor, the fifth pressure sensor being configured to detect a pressure value at the switching communication port of the injector head motor and transmit a signal to the control system; when the pressure value detected by the fifth pressure sensor is greater than or equal to a seventh preset pressure value and less than or equal to an eighth preset pressure value, the control system calculates the displacement of the injection head motor according to the pressure value detected by the fifth pressure sensor; and when the pressure value detected by the fifth pressure sensor is greater than the eighth preset pressure value, the control system calculates the displacement of the injection head motor according to the eighth preset pressure value. By adopting the arrangement, the displacement of the injection head motor can be monitored conveniently, so that troubleshooting and follow-up maintenance operation can be carried out conveniently.

Specifically, the injection head motor displacement monitoring process is as follows: the data measured by the pressure sensor installed at the X port of the injector head motor (i.e., the switching communication port of the injector head motor for controlling the switching of the inflow and outflow directions) is transmitted into the system, and when the value is greater than or equal to 116 (which corresponds to the seventh preset pressure value here), the value is calculated to be 203 (which corresponds to the eighth preset pressure value here), and when the value is greater than 203. 116. The 203, 90, 87, 45 values are suitable for Linde HMV135 series motors. The value of the selected elements can be changed according to manufacturer samples, and the data is set after debugging before the equipment leaves the factory. For the first motor, a pressure sensor arranged at the X port of the first motor detects the pressure and transmits the pressure to the control system; for the second motor, a pressure sensor installed at the X-port of the second motor detects and transmits into the control system.

Specifically, the injector head motor includes a first motor and a second motor; the second monitoring system further comprises: the first flow sensor and the second flow sensor are used for detecting the flow at two communication ports of the first motor and respectively transmitting detected signals to the control system; the third flow sensor and the fourth flow sensor are used for detecting the flow at the two communication ports of the second motor and respectively transmitting the detected signals to the control system; the control system calculates the volumetric efficiency of the first motor by taking the flow of the inlet of the first motor as a first theoretical flow and the flow of the outlet of the first motor as a first actual flow; or the control system calculates to obtain a first theoretical flow according to the rotating speed of the first motor and the displacement of the first motor, obtains a first actual flow according to the well inlet and outlet states of the first motor and the data detected by the first flow sensor, the second flow sensor, the third flow sensor and the third flow sensor, and calculates the volumetric efficiency of the first motor according to the first theoretical flow and the first actual flow; and/or the control system calculates the volumetric efficiency of the second motor by taking the flow of the inlet of the second motor as a second theoretical flow and the flow of the outlet of the second motor as a second actual flow; or the control system calculates a second theoretical flow according to the rotating speed of the second motor and the displacement of the second motor, obtains a second actual flow according to the well inlet and outlet states of the second motor and the data detected by the first flow sensor, the second flow sensor, the third flow sensor and the third flow sensor, and calculates the volumetric efficiency of the first motor according to the second theoretical flow and the second actual flow. Adopt above-mentioned two kinds of modes, the homoenergetic is convenient for carry out accurate calculation to the volumetric efficiency of first motor, and then is convenient for monitor first motor and second motor.

In this embodiment, when the calculated volumetric efficiency of the first motor is lower than the preset volumetric efficiency value, the control system sends twelfth command information, specifically, the twelfth command information is a command of "first motor is inefficient"; and/or when the calculated volumetric efficiency of the second motor is lower than the preset volumetric efficiency value, the control system sends thirteenth command information, specifically, the thirteenth command information is a command of 'low efficiency of the second motor'. By adopting the arrangement, the efficiency of the first motor and the efficiency of the second motor can be judged conveniently according to the monitoring of the first motor and the second motor, and troubleshooting and follow-up maintenance are facilitated.

Specifically, the above process corresponds to a process of monitoring the volumetric efficiency of the injector head motor, and the specific process is as follows: the method is completed by a monitoring numerical value of the displacement of the injection head motor, a monitoring numerical value of the rotating speed of the injection head motor and numerical values of flow sensors of an A port of the first motor, a B port of the second motor, the A port of the first motor and the B port of the second motor. The motor volumetric efficiency is equal to the motor theoretical flow divided by the motor actual flow, and for the motor theoretical flow, the motor rotational speed can be multiplied by the motor displacement, and the motor theoretical flow can also be measured by a motor inlet flow sensor. There are two ways to calculate injector head motor volumetric efficiency. Specifically, when the port a of the first motor flows in as an inlet, the port B of the first motor flows out as an outlet; when the port B of the first motor flows in as an inlet, the port a of the first motor flows out as an outlet. When the port A of the second motor is used as an inlet to flow in, the port B of the second motor is used as an outlet to flow out; when the port B of the second motor flows in as an inlet, the port a of the second motor flows out as an outlet.

Injector head motor volumetric efficiency calculation method one: and (3) calculating the in-out well state judged by combining the injection head motor rotating speed monitoring link by using the value of a flow sensor at the motor inlet as the theoretical flow of the motor and the measured value of a sensor at the motor outlet as the actual flow. When the calculated result of the motor is smaller than N, the system judges that the volumetric efficiency of the motor is low, and the display screen pops the window to prompt that the efficiency of the motor of the injection head is low.

Motor volumetric efficiency calculation method two: and multiplying the motor speed by the motor displacement to obtain the motor theoretical flow. The well inlet and outlet states are judged by combining the injection head motor rotating speed monitoring link, and when the well inlet state is realized, the numerical values measured by the flow sensors at the port B of the first motor and the port A of the second motor are the corresponding theoretical flow; when in the well outlet state, the flow sensors of the A port of the first motor and the B port of the second motor measure the corresponding theoretical flow. Volumetric efficiency eta of motor _{That large volume} The calculation formula of (c) is as follows:

wherein, V _{Displacement of motor} Is motor displacement, n _{Speed of motor} Is the motor speed, Q _{Actual flow of motor} Is the actual flow rate of the motor. When the motor is a first motor, substituting corresponding data of the first motor for calculation; when the motor is the firstAnd when the motors are two, the corresponding data of the second motor are substituted for calculation.

In this embodiment, the second monitoring system further includes: a first fill head filter and a second fill head filter. Wherein, the monitoring process of the first filling head filter is as follows: the pressure difference signal generator 04-4 arranged on the first injection head filter is used for measuring, when an electric signal is transmitted into the control system by the filter pressure difference signal generator and the numerical value of the hydraulic oil temperature sensor 01-1 is larger than D, a display screen popup window prompts that the first injection head filter is blocked and a filter element is required to be replaced. And D value is determined according to the specifically selected elements and tests of the equipment, and the data is set after the equipment is debugged before leaving factory. The monitoring process of the second filling head filter is as follows: the pressure difference signal generator 04-5 arranged on the injection head filter is used for measuring, when an electric signal is transmitted into the control system by the pressure difference signal generator of the second injection head filter, and the numerical value of the hydraulic oil temperature sensor 01-1 is larger than D, a display screen popup window prompts that the second injection head filter is blocked and a filter element is required to be replaced. And D value is determined according to the specifically selected elements and tests of the equipment, and the set data is debugged before the equipment leaves the factory.

In this embodiment, the hydraulic monitoring system further includes a third monitoring system, and the third monitoring system is configured to monitor an operating condition of the oil tank, so that the control system sends a corresponding instruction according to a signal detected by the third monitoring system.

Specifically, the third monitoring system includes a third temperature sensor, and specifically the hydraulic oil temperature monitoring process is: and the measured data of a third temperature sensor arranged on the oil tank is transmitted into the control system, and the data is used for judging in other links.

In this embodiment, the third monitoring system further includes a liquid level sensor, and the oil tank liquid level monitoring process is: the measured data of a liquid level sensor arranged on the oil tank is transmitted into the control system, and when the value is lower than the A value, a display screen popup window prompts that the liquid level is low and hydraulic oil is required to be filled. And the value A is determined according to the specific configuration and test of the equipment, and the data is set after the equipment is debugged before leaving the factory.

In this embodiment, one of the port a of the infusion pump and the port B of the infusion pump is an inlet port and the other is an outlet port, the port B of the infusion pump is an outlet port if the port a of the infusion pump is an inlet port, and the port a of the infusion pump is an outlet port if the port B of the infusion pump is an inlet port. One of the port a of the first motor and the port B of the first motor is an inflow port and the other is an outflow port, the port a of the first motor is an outflow port if the port a of the first motor is an inflow port, and the port a of the first motor is an outflow port if the port B of the first motor is an inflow port. An L1 port in the injection pump is an upper oil drainage port, an L2 port in the injection pump is a lower oil drainage port, X1 and X2 ports are used for controlling whether the inflow direction and the outflow direction of the A port and the B port are switched, an M1 port is used for measuring data of the A port, an M2 port is used for measuring data of the B port, an M3 port and an M6 port are connected with an oil supplementing pump passage, and an M4 port and an M5 port are used for controlling the displacement of the injection pump through communicated ports in the inflow direction of the injection pump. The L port of the first motor is an oil drainage port of the first motor, and the L port of the second motor is an oil drainage port of the second motor.

In this embodiment, the hydraulic monitoring system further includes a brake valve, a butterfly valve, a shuttle valve, a granularity detector, and a flush valve.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the parameters of the equipment such as a flow sensor, a pressure sensor, a temperature sensor, a rotating speed sensor and the like are added to the original configuration of the injection head. The states of the injection heads are displayed to a user by arranging devices such as a pressure sensor, a temperature sensor and a granularity monitor on the coiled tubing operation vehicle and combining the devices such as an electric control display on the coiled tubing operation machine, and the device is reminded when the equipment operation is abnormal and needs maintenance. The reliability of the equipment is improved, and a user can conveniently know the state of the hydraulic system of the equipment.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (14)

1. A hydraulic monitoring system, comprising:

the injection pump is connected with the oil tank, and the injection head motor is connected with the injection pump;

the injection head monitoring system comprises a first monitoring system and/or a second monitoring system, wherein the first monitoring system is used for monitoring the working condition of the injection pump, and the second monitoring system is used for monitoring the working condition of the injection head motor;

and the first monitoring system and/or the second monitoring system are/is connected with the control system, so that the control system sends out corresponding prompt instructions according to the signals monitored by the first monitoring system and/or the second monitoring system.

2. The hydraulic monitoring system of claim 1, wherein the first monitoring system comprises:

the first pressure sensor is used for detecting the pressure at the oil supplementing opening and sending a detected signal to the control system;

when the pressure value detected by the first pressure sensor is smaller than a first preset pressure value, the control system sends out first instruction information; when the pressure value detected by the first pressure sensor is greater than or equal to a first preset pressure value and smaller than a second preset pressure value, the control system sends out second instruction information.

3. The hydraulic monitoring system of claim 1, further comprising a first filter coupled to the charge pump; the first monitoring system further comprises:

the first differential pressure signal emitter is connected with the first filter and used for detecting a differential pressure signal of the first filter and sending the detected signal to the control system;

and when the differential pressure signal detected by the first differential pressure signal transmitter is greater than a third preset pressure value, the control system transmits third instruction information.

4. The hydraulic monitoring system of claim 1, wherein the first monitoring system further comprises:

the first temperature detection piece is arranged at the oil drainage port of the injection pump and used for detecting the temperature at the oil drainage port of the injection pump and sending a detected signal to the control system;

when the temperature detected by the first temperature detection piece is greater than or equal to a first preset temperature, the control system sends out fourth instruction information; when the temperature detected by the first temperature detection piece is greater than or equal to a second preset temperature value and less than a first preset temperature value, the control system sends out fifth instruction information.

5. The hydraulic monitoring system of claim 1, wherein the first monitoring system further comprises:

the negative pressure sensor is arranged at the oil suction port of the injection pump and used for detecting the oil suction pressure at the oil suction port of the injection pump and sending a detected signal to the control system;

when the pressure value detected by the negative pressure sensor is smaller than or equal to a fourth preset pressure value, the control system sends sixth instruction information;

when the pressure value detected by the negative pressure sensor is greater than the fourth preset pressure value and less than a fifth preset pressure value, judging the magnitude condition of the pressure value detected by the negative pressure sensor and a sixth preset pressure value;

when the pressure value detected by the negative pressure sensor is smaller than a sixth preset pressure value, the control system sends seventh instruction information; and when the pressure value detected by the negative pressure sensor is greater than or equal to a sixth preset pressure value, the control system sends eighth instruction information.

6. The hydraulic monitoring system of claim 1, wherein the first monitoring system further comprises:

and the second pressure sensor is arranged on the shuttle valve between the first communication port and the second communication port of the injection pump and is used for detecting the pressure of the shuttle valve and sending a detected signal to the control system.

7. The hydraulic monitoring system of claim 1, wherein the injector head motor comprises a first motor and a second motor;

the first monitoring system further comprises: the third pressure sensor is arranged at a fourth communication port of the injection pump and is used for detecting the pressure at the fourth communication port and transmitting a signal to the control system; the fourth pressure sensor is arranged at a fifth communication port of the injection pump and is used for detecting the pressure at the fifth communication port and transmitting a signal to the control system;

the second monitoring system further comprises: the first flow sensor and the second flow sensor are used for detecting the flow at two communication ports of the first motor and respectively transmitting detected signals to the control system; the third flow sensor and the fourth flow sensor are used for detecting the flow at two communication ports of the second motor and respectively transmitting detected signals to the control system;

wherein the control system monitors volumetric efficiency of the infusion pump based on signals detected by the third pressure sensor, the fourth pressure sensor, the first flow sensor, the second flow sensor, the third flow sensor, and the fourth flow sensor; and when the volumetric efficiency of the injection pump is smaller than the preset volumetric efficiency, the control system sends ninth instruction information.

8. The hydraulic monitoring system of claim 7,

the control system judges the loop state of the injection pump according to the signal detected by the third pressure sensor and the signal detected by the fourth pressure sensor and calculates the theoretical displacement of the injection pump;

the control system calculates the actual flow of the injection pump according to the loop state of the injection pump, the signal detected by the first flow sensor, the signal detected by the second flow sensor, the signal detected by the third flow sensor and the signal detected by the fourth flow sensor;

the control system calculates the rotating speed of the injection pump according to the rotating speed of the engine, the speed ratio of the power takeoff and the speed ratio of the transfer case;

when the loop state of the injection pump is in a well outlet state, the control system calculates the volumetric efficiency of the injection pump according to the well outlet flow of the injection pump, the rotating speed of the injection pump, the actual flow of the injection pump and the theoretical displacement of the injection pump; and when the loop state of the injection pump is in a well entering state, the control system calculates the volumetric efficiency of the injection pump according to the well entering flow of the injection pump, the rotating speed of the injection pump, the actual flow of the injection pump and the theoretical displacement of the injection pump.

9. The hydraulic monitoring system of claim 1, wherein the second monitoring system further comprises:

the second temperature detection piece is arranged at an oil drain port of the injection head motor and is used for detecting a temperature value at the oil drain port of the injection head motor and transmitting a signal to the control system;

and when the temperature value detected by the second temperature detection piece is greater than a third preset temperature value, the control system sends tenth instruction information.

10. The hydraulic monitoring system of claim 1, wherein the second monitoring system further comprises:

a rotational speed sensor disposed at a sprocket of the injector head motor, the rotational speed sensor for detecting a rotational speed of the sprocket and transmitting a signal to the control system;

the control system calculates the rotating speed of the injection head according to the rotating speed value detected by the rotating speed sensor and the speed ratio of the speed reducer; and when the rotating speed of the injection head is greater than the preset rotating speed, the control system sends eleventh instruction information.

11. The hydraulic monitoring system of claim 1, wherein the second monitoring system further comprises:

the fifth pressure sensor is arranged at a switching communication port of the injection head motor and used for detecting the pressure value of the switching communication port of the injection head motor and transmitting a signal to the control system;

when the pressure value detected by the fifth pressure sensor is greater than or equal to a seventh preset pressure value and less than or equal to an eighth preset pressure value, the control system calculates the displacement of the injection head motor according to the pressure value detected by the fifth pressure sensor; and when the pressure value detected by the fifth pressure sensor is greater than the eighth preset pressure value, the control system calculates the displacement of the injection head motor according to the eighth preset pressure value.

12. The hydraulic monitoring system of claim 1, wherein the injector head motor comprises a first motor and a second motor; the second monitoring system further comprises: the first flow sensor and the second flow sensor are used for detecting the flow at two communication ports of the first motor and respectively transmitting detected signals to the control system; the third flow sensor and the fourth flow sensor are used for detecting the flow at two communication ports of the second motor and respectively transmitting detected signals to the control system;

the control system calculates the volumetric efficiency of the first motor by taking the flow rate of the inlet of the first motor as a first theoretical flow rate and the flow rate of the outlet of the first motor as a first actual flow rate; or the control system calculates a first theoretical flow according to the rotating speed of the first motor and the displacement of the first motor, obtains a first actual flow according to the well inlet and outlet states of the first motor and the data detected by the first flow sensor, the second flow sensor, the third flow sensor and the third flow sensor, and calculates the volumetric efficiency of the first motor according to the first theoretical flow and the first actual flow; and/or the presence of a gas in the gas,

the control system calculates the volumetric efficiency of the second motor by taking the flow rate of the inlet of the second motor as a second theoretical flow rate and the flow rate of the outlet of the second motor as a second actual flow rate; or the control system calculates a second theoretical flow according to the rotating speed of the second motor and the displacement of the second motor, obtains a second actual flow according to the well inlet and outlet states of the second motor and the data detected by the first flow sensor, the second flow sensor, the third flow sensor and the third flow sensor, and calculates the volumetric efficiency of the first motor according to the second theoretical flow and the second actual flow.

13. The hydraulic monitoring system of claim 12,

when the calculated volumetric efficiency of the first motor is lower than a preset volumetric efficiency value, the control system sends twelfth command information; and/or the presence of a gas in the atmosphere,

and when the calculated volumetric efficiency of the second motor is lower than a preset volumetric efficiency value, the control system sends thirteenth command information.

14. The hydraulic monitoring system of claim 1, further comprising:

and the third monitoring system is used for monitoring the working condition of the oil tank so that the control system sends out a corresponding instruction according to the signal detected by the third monitoring system.

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