CN117027702A - Underground sleeve valve measurement and control system - Google Patents
Underground sleeve valve measurement and control system Download PDFInfo
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- CN117027702A CN117027702A CN202311115582.3A CN202311115582A CN117027702A CN 117027702 A CN117027702 A CN 117027702A CN 202311115582 A CN202311115582 A CN 202311115582A CN 117027702 A CN117027702 A CN 117027702A
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- 238000005259 measurement Methods 0.000 title claims abstract description 32
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 36
- 230000006698 induction Effects 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 81
- 239000010720 hydraulic oil Substances 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 2
- 230000005672 electromagnetic field Effects 0.000 claims description 2
- 239000010729 system oil Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 7
- 230000001960 triggered effect Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 27
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 13
- 239000002002 slurry Substances 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
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Abstract
The application discloses a measurement and control system of a downhole sleeve valve, which comprises a piston for driving a valve plate and a hydraulic control system for driving the piston; the hydraulic control system comprises a motor pump valve assembly, a hydraulic control driving electromagnetic valve assembly, a hydraulic control oil return electromagnetic valve assembly and a balance piston oil bag assembly; the motor pump valve assembly comprises a motor and a hydraulic pump connected with the motor; the system also comprises a battery pack, a processor, an electromagnetic induction coil and a vibration sensor, wherein the electromagnetic induction coil and a ground start-stop pump sequence signal are respectively connected with a hydraulic control system signal; the application can trigger the valve plate to open and close in two ways, wherein the hydraulic control system is triggered by the ground start-stop pump sequence signal to push the piston to open and close the valve plate; the hydraulic control system is triggered by the induction signals of the electromagnetic induction coils to push the piston to open and close the valve plate, and the two triggering modes improve the triggering success rate; the valve plate is opened and closed without being limited by the performance of a ground mud pump and the pressure of a liquid column at the bottom of the well, and the opening and closing sensitivity of the valve plate is improved.
Description
Technical Field
The application relates to the technical field of oil and gas field under-balanced drilling, in particular to a downhole casing valve measurement and control system capable of realizing overall-process under-balanced drilling.
Background
In the underbalanced drilling implementation process, namely drilling and tripping operation, the underbalanced state which is relatively stable in the well is always maintained, and the underbalanced drilling implementation method is important for reservoir protection and drilling safety. The whole process of underbalanced drilling is to maintain the underbalanced state of the bottom of the well in the whole drilling, well completion testing and tripping processes so as to achieve the purposes of finding and protecting the reservoir. In the whole process of underbalanced drilling operation, the bottom hole pressure is kept smaller than the stratum pressure in the drilling and tripping operation process.
At present, two methods for realizing overall process underbalanced drilling in the field of petroleum drilling are available: one is to use a snubbing unit and the second is to use a downhole casing valve. The method for realizing the whole process of underbalanced drilling by using the downhole casing valve is briefly described as follows: when the wellhead is pressurized in the process of tripping and the drill bit is positioned below the downhole casing valve, a rotary control head and a special choke manifold are matched to be used at the wellhead Shi Huiya, so that dynamic control of the pressure of a shaft is realized; when the drill bit is lifted above the underground sleeve valve, the underground sleeve valve is closed by the ground control device to seal the shaft, the wellhead is not pressurized at the moment, and the conventional drilling lifting operation is implemented after the rotary control head is disassembled. When the drill bit is in close proximity to the downhole casing valve, the seat seal wellhead rotating control head is connected with the kelly, the small-displacement pump is opened to hold pressure to assist in opening the downhole casing valve to open a well, and the kelly is removed after the well is opened to carry out the drill operation; the tripping process is matched with the use of a rotary control head and a special choke manifold to apply back pressure at a wellhead so as to realize dynamic control of the pressure of a shaft.
With the increasing development of drilling engineering, under the conditions that oil and gas reservoirs are more difficult to develop and geological conditions are more complex, the common underbalanced drilling operation cannot reach an underbalanced state during well completion, well logging and tripping, and the purpose of effectively protecting an oil and gas layer cannot be achieved.
It can be seen that conventional downhole casing valves for underbalanced drilling have been difficult to adapt to the current state of drilling engineering, and have not achieved an underbalanced condition in application, and have not been effective in protecting the hydrocarbon reservoir. Moreover, the valve plate of the underground sleeve valve is opened and closed by adopting slurry pressure in the prior art, so that the valve plate of the underground sleeve valve is opened and closed by the performance of a ground slurry pump and the pressure of a liquid column at the bottom of a well, and the problem that the valve plate is not sensitive enough is solved. Therefore, a new solution is needed to solve the problems existing in the prior art.
Disclosure of Invention
The application provides a measurement and control system of an underground sleeve valve, which aims to solve the problems that the valve plate of the underground sleeve valve is limited to open and close and the reaction is not sensitive enough in the prior art.
In order to achieve the above object, the present application provides the following technical solutions:
the application provides a measurement and control system of an underground sleeve valve, which comprises a sleeve body, wherein a piston used for driving a valve plate is arranged in the sleeve body, and a hydraulic oil cavity is formed by the piston and the inner wall of a pipe cavity of the sleeve body; the side wall of the sleeve body is provided with a containing cavity, a hydraulic control system and a circuit component are arranged in the containing cavity, and a sealing cover plate is arranged at the opening of the containing cavity;
the hydraulic control system comprises a motor pump valve assembly, a hydraulic control driving electromagnetic valve assembly, a hydraulic control oil return electromagnetic valve assembly, a balance piston oil bag assembly and an oil tank; the motor pump valve assembly comprises a motor and a hydraulic pump connected with the motor, the hydraulic control driving electromagnetic valve assembly is connected with a hydraulic pump oil way and is connected with a circuit assembly through a signal, and the hydraulic control oil return electromagnetic valve assembly is connected with the circuit assembly through a signal and is connected with a balance piston oil bag assembly oil way;
the circuit assembly comprises a battery pack, an upper electric connector, a processor, a motor driving module, an electromagnetic induction coil and a vibration sensor, wherein the electromagnetic induction coil and a ground start-stop pump sequence signal are respectively connected with a hydraulic control system signal; the ground start-stop pump sequence signal triggers the hydraulic control system to push the piston to realize the opening and closing of the valve plate; the induction signal of the electromagnetic induction coil triggers the hydraulic control system to push the piston to open and close the valve plate.
In the technical scheme, one end of the piston is arranged in the piston limit sleeve, and the piston limit sleeve is arranged on the inner wall of the pipe cavity of the sleeve body; the piston moves reciprocally along the hydraulic oil cavity under the action of hydraulic oil, so as to realize the opening or closing of the valve plate.
Further, one end of the hydraulic oil cavity is provided with a high-pressure oil inlet, and the other end of the hydraulic oil cavity is provided with an oil return port; the hydraulic oil cavity is connected with an oil way of a hydraulic control system.
Further, the motor pump valve assembly further comprises an overflow valve group, the inlet end of the hydraulic pump is connected with the oil tank, the outlet end of the hydraulic pump is connected with the oil tank through the overflow valve group, and the overflow valve group comprises an overflow valve and a safety valve which are arranged in parallel.
Further, the hydraulic control driving electromagnetic valve assembly comprises a first electromagnetic valve and a second electromagnetic valve, wherein the inlet end of the first electromagnetic valve is connected with the outlet end of the hydraulic pump, the outlet end of the first electromagnetic valve is connected with the inlet end of the second electromagnetic valve and is connected with the high-pressure oil inlet, and the outlet end of the second electromagnetic valve is connected with the oil tank.
Further, the hydraulic control oil return electromagnetic valve assembly comprises a third electromagnetic valve and a fourth electromagnetic valve, wherein the inlet end of the third electromagnetic valve is connected with the outlet end of the hydraulic pump, the outlet end of the third electromagnetic valve is connected with the oil return port and the inlet end of the fourth electromagnetic valve, and the outlet end of the fourth electromagnetic valve is connected with the oil tank.
Further, the motor is connected with the processor through a high-pressure sealing connector; the processor is internally provided with an instruction receiving and motor control circuit module which is respectively connected with the power supply module, the communication module, the instruction receiving module, the output control module, the clock module and the storage module.
Further, the processor is connected with the hydraulic control driving electromagnetic valve assembly through signals and is connected with the hydraulic control oil return electromagnetic valve assembly through signals, and the processor realizes driving control of the piston through action control of the hydraulic control driving electromagnetic valve assembly and the hydraulic control oil return electromagnetic valve assembly, so that opening and closing control of the valve plate is realized.
Further, the battery pack is connected with the upper electric connector, the upper electric connector is connected with the processor, the processor controls the motor to start and stop through the motor driving module, and the motor driving module is connected with the electromagnetic induction coil; the processor is in signal connection with the electromagnetic induction coil.
Further, the sleeve body is of a columnar cylinder structure, the accommodating cavity is a strip-shaped groove cavity formed along the axial direction of the sleeve body, and the top of the strip-shaped groove cavity is sealed through the sealing cover plate; the outer wall of the sleeve body is provided with a cover plate for covering the electric connector.
Further, the circuit assembly is in signal connection with a ground control system, and the ground control system outputs a ground start-stop pump sequence signal to the circuit assembly.
Further, the electromagnetic induction coil is in signal connection with an electromagnetic sensor arranged at the drill bit, when the electromagnetic sensor detects the change of a surrounding electromagnetic field, a signal is sent to the electromagnetic induction coil, and the electromagnetic induction coil triggers the hydraulic control system after receiving the signal.
Compared with the prior art, the application has the following beneficial effects:
the application provides a measurement and control system of a downhole casing valve, which comprises a piston for driving a valve plate, a hydraulic control system for driving the piston and a circuit assembly; the hydraulic control system comprises a motor pump valve assembly, a hydraulic control driving electromagnetic valve assembly, a hydraulic control oil return electromagnetic valve assembly, a balance piston oil bag assembly and an oil tank; the motor pump valve assembly comprises a motor and a hydraulic pump connected with the motor; the circuit assembly comprises a battery pack, an upper electric connector, a processor, a motor driving module, an electromagnetic induction coil and a vibration sensor, wherein the electromagnetic induction coil and a ground start-stop pump sequence signal are respectively connected with a hydraulic control system signal. Therefore, the system for measuring and controlling the underground sleeve valve can trigger the valve plate to open and close in two modes, and firstly, the system triggers the hydraulic control system to push the piston to open and close through the ground start-stop pump sequence signal; the hydraulic control system is triggered by the induction signals of the electromagnetic induction coils to push the piston to open and close the valve plate, and the two valve plate opening and closing triggering modes improve the triggering success rate; furthermore, the valve plate is opened and closed by the hydraulic control system, so that the valve plate is not limited by the performance of a ground mud pump and the pressure of a liquid column at the bottom of the well, the problem that the valve plate is difficult to open and close by adopting the mud pressure in the prior art is solved, and the opening and closing sensitivity of the valve plate is improved; in addition, the battery pack and the power-on connector are arranged in the system, so that the problem of long-time power supply at the bottom of the well is solved. The use of the underground sleeve valve measurement and control system provided by the application can effectively control the well kick and well leakage risks in the well drilling process, and improve the well drilling efficiency and safety; by controlling the opening and closing of the valve plate, the regulation of wellhead pressure is realized, the bottom hole pressure is ensured to be always greater than wellhead pressure, and the underground underbalanced drilling is achieved, so that possible accidents are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. It should be understood that the specific shape and configuration shown in the drawings are not generally considered limiting conditions in carrying out the application; for example, those skilled in the art will be able to make routine adjustments or further optimizations for the addition/subtraction/attribution division, specific shapes, positional relationships, connection modes, dimensional proportion relationships, and the like of certain units (components) based on the technical concepts and the exemplary drawings disclosed in the present application.
FIG. 1 is a schematic diagram of the structural components of a downhole casing valve measurement and control system according to one embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of section A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of section B-B of FIG. 1;
FIG. 4 is a schematic diagram of the hydraulic control principle of the downhole casing valve measurement and control system according to the present application;
FIG. 5 is a circuit diagram of a hydraulic control system of the downhole casing valve measurement and control system provided by the application in one embodiment.
Reference numerals illustrate:
1. a sleeve body; 2. a hydraulic control system; 3. a bi-directional solenoid valve control assembly; 4. a hydraulic body; 5. a piston; 6. a piston limit sleeve; 7. a circuit assembly; 8. sealing the cover plate; 9. an electromagnetic induction coil; 10. powering on the electrical connector; 11. a battery pack; 12. a balance piston oil bladder assembly; 13. a high pressure oil inlet; 14. an oil return port; 15. a first electromagnetic valve; 16. a second electromagnetic valve; 17. a third electromagnetic valve; 18. a fourth electromagnetic valve; 19. a hydraulic pump; 20. a motor; 21. an overflow valve; 22. a safety valve; 23. a high pressure sealed connector; 24. an oil tank; 25. a processor; 26. the instruction receiving and motor control circuit module; 27. a power supply module; 28. a communication module; 29. an instruction receiving module; 30. an output control module; 31. a clock module; 32. a storage module; 33. a motor driving module; 34. an RS485 bus; 35. a vibration switch module; 36. an A/D conversion module; 37. a DC/DC module; 38. 8-core high-pressure sealing plug.
Detailed Description
The application will be further described in detail by means of specific embodiments with reference to the accompanying drawings.
In the description of the present application: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this disclosure are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on the degree of importance or order, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).
The terms such as "upper", "lower", "left", "right", "middle", etc. are generally used herein for convenience of visual understanding with reference to the drawings and are not to be construed as absolute limitations on the positional relationship of the actual product. Such changes in the relative positional relationship without departing from the technical idea of the present application are also considered as the scope of the present application.
In order to solve the problems in the prior art, the application provides a measurement and control system of an underground sleeve valve, wherein the opening and closing of a valve plate of the sleeve valve has two triggering modes: firstly, triggering a hydraulic control system to push a piston to open or close a valve plate through a ground start-stop pump sequence signal; secondly, an induction signal of electromagnetic induction at the drill bit triggers a hydraulic control system to push a piston to open or close a valve plate. The induction signals of electromagnetic induction at the drill bit are subjected to signal identification through the vibration sensor and the electromagnetic induction coil.
The ground start-stop pump sequence signal in the application is a signal for controlling the start-stop sequence of pumps in a hydraulic system on the ground, and a plurality of pumps need to be started and stopped according to a specific sequence in order to ensure the normal operation of the pumps and the balance of the system. The surface on-off pump sequence signal may be generated by a control panel or switch in the surface control system. The ground start-stop pump sequence signal is generally sent by pressing corresponding buttons or switches in a certain logic sequence according to the requirements and the running state of the system. The ground start-stop pump sequence signal plays an important role in the hydraulic system, and ensures the correct start-stop sequence of the hydraulic pump, thereby effectively managing the supply and control of hydraulic power.
The system can control the underground valve through the ground start-stop pump sequence signal or by using electromagnetic induction at the drill bit, so that the pressure of the wellhead can be adjusted to be lower than the stratum pressure, and the purpose of underground underbalanced drilling can be achieved. The use of the underground sleeve valve measurement and control system can effectively control the well kick and lost circulation risks in the well drilling process and improve the well drilling efficiency and safety. By controlling the opening and closing of the valve, the adjustment of the wellhead pressure can be realized, and the bottom hole pressure is ensured to be always greater than the wellhead pressure, so that possible accidents are avoided.
The application provides an underground sleeve valve measurement and control system which mainly comprises a sleeve body 1, a motor 20 pump valve assembly, a hydraulic control driving electromagnetic valve assembly, a hydraulic control oil return electromagnetic valve assembly, a battery and a cover plate thereof, a circuit and a cover plate thereof, an upper electric connector 10 and a cover plate thereof, a piston 5 for driving a valve plate, a piston limit sleeve 6 and the like, as shown in figure 1. The motor 20, the pump valve assembly, the hydraulic control driving electromagnetic valve assembly, the hydraulic control oil return electromagnetic valve assembly and the balance piston oil bag assembly 12 form a hydraulic control system 2, and the hydraulic control system 2 is a main component of the underground sleeve valve measurement and control system provided by the application.
In the underground casing valve measurement and control system provided by the application, a pump valve assembly of a motor 20 comprises the motor 20, a hydraulic pump 19 and an overflow valve group, and referring to fig. 4, the motor 20 is connected with the hydraulic pump 19, the inlet end of the hydraulic pump 19 is connected with an oil tank 24, the outlet end of the hydraulic pump 19 is connected with the oil tank 24 through the overflow valve group, and the overflow valve group comprises an overflow valve and a safety valve 22 which are arranged in parallel.
In order to realize automatic control, the motor 20 is connected with a processor 25 of a control device through a high-voltage sealing connector 23, a command receiving and motor 20 control circuit module is arranged in the processor 25, and a power supply module 27, a communication module 28, a command receiving module 29, an output control module 30, a clock module 31, a storage module 32 and the like which are respectively connected with the command receiving and motor 20 control circuit module signals are also arranged in the control device.
With continued reference to fig. 4, the processor 25 is respectively connected with four two-position two-way electromagnetic valves through high-pressure sealing connectors 23 in a signal manner, so as to realize electrical control of the four two-position two-way electromagnetic valves, further realize on-off and trend control of a hydraulic oil way, and finally realize opening and closing control of a valve plate through pushing a piston 5 by hydraulic oil.
The valve plate is connected with the piston 5, and the piston 5 can reciprocate along the axial direction of the sleeve body 1 under the action of high-pressure oil, so that one end of the sleeve valve forms a high-pressure oil inlet 13, and the other end forms an oil return opening 14.
Of the four two-position two-way solenoid valves, two-position two-way solenoid valves form a hydraulically driven solenoid valve assembly, and if the two-position two-way solenoid valves are respectively marked as a first solenoid valve 15 and a second solenoid valve 16, then: the inlet end of the first electromagnetic valve 15 is connected with the outlet end of the hydraulic pump 19, and the outlet end of the first electromagnetic valve 15 is connected with the inlet end of the second electromagnetic valve 16 and also connected with the high-pressure oil inlet 13; the outlet end of the second solenoid valve 16 is connected to a fuel tank 24.
The other two-position two-way electromagnetic valves form a hydraulic oil return electromagnetic valve assembly, and if the two-position two-way electromagnetic valves are respectively marked as a third electromagnetic valve 17 and a fourth electromagnetic valve 18, the two-position two-way electromagnetic valves are: the inlet end of the third electromagnetic valve 17 is connected with the outlet end of the hydraulic pump 19, the outlet end of the third electromagnetic valve 17 is connected with the oil return port 14, and is also connected with the inlet end of the fourth electromagnetic valve 18, and the outlet end of the fourth electromagnetic valve 18 is connected with the oil tank 24.
Referring to fig. 5, the circuit structure of the downhole casing valve measurement and control system provided by the application can be briefly described as follows: the battery pack 11 is connected with the upper electric connector 10, the upper electric connector 10 can be a Lei Mo plug of CN-2E-TT6 type, and 6 cables are arranged on a Lei Mo plug in the figure; two different interfaces J1, J2 are formed in the electromagnetic coil 9 circuit, where J1 represents the control signal input interface of the coil circuit and J2 represents the control signal output interface. The upper electric connector 10 is connected with a processor 25 (CPU) through an RS485 bus, the processor 25 controls the start and stop of the motor 20 through a motor 20 driving module, and the motor 20 driving module is connected with the electromagnetic induction coil 9 in a circuit and is connected with the upper electric connector 10. The processor 25 is connected with a clock module 31, a vibration switch module, a storage module 32, an A/D conversion module and four two-position two-way electromagnetic valves. The motor 20 is connected to other equipment by a high pressure seal connector 23, wherein the high pressure seal connector 23 may be an 8-core high pressure seal plug, as in fig. 5, having 8 cables.
When the underground sleeve valve measurement and control system provided by the application is used, the underground circuit is triggered to control the motor 20 of the motor 20 pump valve assembly to rotate in a ground start-stop pump sequence or electromagnetic induction mode, then the hydraulic pump 19 generates high-pressure oil, the high-pressure oil passes through the hydraulic control driving electromagnetic valve assembly, the opening and closing of the electromagnetic valve are controlled to convey the high-pressure oil to one end of the piston 5, the piston 5 is driven to move, and an oil way at the other end returns to the balance piston oil bag assembly 12 through the hydraulic control oil return electromagnetic valve assembly. In a specific application example, the system is powered by the battery pack 11 (DC 28V,11 Ah) in parallel, and a suitable battery is selected according to the working time requirement of the system, the rated current of the motor 20 and the structural size.
The above-mentioned ground start-stop pump sequence refers to that in the process of controlling wellhead pressure on the ground, different pumps are started and stopped according to a certain sequence to realize pressure regulation, and the start-stop pump sequence signal triggers a circuit assembly 7 in the downhole casing valve measurement and control system, and the circuit assembly 7 controls the hydraulic control system 2 to push the piston 5 to realize opening and closing of the valve plate. The specific configuration and manner of operation of the above-ground pump sequences may be designed according to specific drilling requirements and geological conditions, which may take into account the nature of the drilling fluid, the depth of the well, the diameter of the well, the formation type, etc., to ensure the safety and effectiveness of the downhole underbalanced drilling.
The electromagnetic induction mode is that the underground valve is controlled by using electromagnetic induction at the drill bit, in the specific installation and realization process, an electromagnetic sensor can be installed at a proper position near the drill bit and used for detecting and sensing the state of the underground valve, a bidirectional electromagnetic valve control assembly 3 in an underground sleeve valve measurement and control system is opened and closed according to external signals, the electromagnetic sensor at the drill bit is connected with a control system on the ground, and the control system on the ground receives sensor signals transmitted by the drill bit and transmits control signals to the bidirectional electromagnetic valve control assembly 3 in the underground according to requirements, so that the opening and closing control of a valve plate is realized. During operation, the status of the downhole valve may be continuously monitored by the sensor and feedback information transmitted back to the surface control system to ensure accurate control and regulation. Through the steps, the electromagnetic induction sensor at the drill bit can sense the state of the underground valve and transmit information to a surface control system. And the ground control system opens or closes the underground valve through the electromagnetic control device according to the received signal, so that the underground valve is controlled. The electromagnetic induction coil 9 circuit in the application can perform decoding, amplifying, filtering and other operations according to the signals provided by the electromagnetic sensor so as to obtain more accurate measurement results.
The structure of the downhole casing valve measurement and control system provided by the application is described in detail below.
The application provides a measurement and control system of an underground sleeve valve, which comprises a sleeve body 1, wherein a piston 5 used for driving a valve plate is arranged in the sleeve body 1, a cavity used for filling hydraulic oil is formed between the piston 5 and the inner wall of the sleeve body 1, the cavity can be divided into an oil inlet cavity and an oil return cavity, and the oil inlet cavity and the oil return cavity are respectively connected with a hydraulic control system 2; one end of the piston 5 is provided with a piston limit sleeve 6, and the piston limit sleeve 6 is arranged on the inner wall of the pipe cavity of the sleeve body 1.
A containing cavity is formed in the side wall of the sleeve body 1, a hydraulic control system 2 and a two-way electromagnetic valve control assembly 3 connected with the hydraulic control system 2 are arranged in the containing cavity, and the two-way electromagnetic valve control assembly 3 comprises a hydraulic control driving electromagnetic valve assembly and a hydraulic control oil return electromagnetic valve assembly; the accommodating cavity is also internally provided with a circuit assembly 7 and an electromagnetic induction coil 9, and the accommodating cavity is provided with a sealing cover plate 8. Referring to fig. 1, the circuit assembly 7 and the electromagnetic induction coil 9 are sealed in the accommodating cavity by a circuit cover plate, and a sealing structure is arranged on the circuit cover plate.
A battery pack 11, an upper electric connector 10 and a balance piston oil bag component 12 are also arranged in the accommodating cavity arranged on the side wall of the sleeve body 1, and a cover plate is arranged on the upper electric connector 10.
The balance piston oil bladder assembly 12 used in the present application is a device for effecting movement of the balance piston 5 in a hydraulic or pneumatic system and is comprised of the piston 5, oil bladder and associated connecting lines and control components. The general structure may comprise two interconnected oil bags, each with a piston 5, the two pistons 5 being connected by a communication conduit and being connected on both sides to a working fluid or gas supply connection, respectively. When no force or pressure is applied to the oil bag, the two pistons 5 are in an equilibrium state, and the liquid or gas in the communication pipeline is in a static state and does not flow; when a force or pressure is applied to one of the pistons 5, that piston 5 will move in a corresponding direction pushing liquid or gas into the other side of the communication channel. Because of the existence of the communication pipeline, liquid or gas can move from one piston 5 to the other piston 5, so that the two pistons 5 are balanced, unbalanced conditions in a hydraulic or pneumatic system can be prevented, and the stability and the working efficiency of the system are improved.
When the underground sleeve valve measurement and control system is triggered, the motor 20 in the motor 20 pump valve assembly rotates, the hydraulic pump 19 starts to work, high-pressure oil is provided by the traction or driving mechanism, in the hydraulic control system 2, the high-pressure oil flowing through the hydraulic control driving electromagnetic valve assembly is controlled according to the opening and closing states of the electromagnetic valve, the high-pressure oil can be conveyed to one end of the piston 5 by controlling the opening and closing states of the electromagnetic valve, so that the force is applied to move the piston 5, namely the valve plate is driven to move, the piston 5 can be driven to move under the action of hydraulic pressure, and the other side of the system can return an oil way to the balance piston oil bag assembly 12 through the hydraulic control oil return electromagnetic valve assembly. Namely, by controlling the on-off state of the solenoid valve, the flow of high-pressure oil is controlled, thereby realizing accurate control of the piston 5.
In summary, the underground sleeve valve measurement and control system provided by the application has two valve plate opening and closing triggering modes, and the triggering success rate is improved by combining the start-stop pump and electromagnetic induction; the application realizes the opening and closing of the valve plate through the hydraulic control system, and is not limited by the performance of the ground slurry pump and the pressure of the liquid column at the bottom of the well; the problem that the valve plate is difficult to open and close by adopting slurry pressure in the prior art is solved, and in addition, the battery pack and the power-on connector are arranged in the sleeve body, so that the problem of long-time power supply at the bottom of the well is solved.
Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.
The application has been described above with particularity and detail in connection with general description and specific embodiments. It should be understood that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but these conventional modifications and further innovations may also fall within the scope of the claims of the present application as long as they do not depart from the technical spirit of the present application.
Claims (8)
1. The system is characterized by comprising a sleeve body, wherein a piston used for driving a valve plate is arranged in the sleeve body, and a hydraulic oil cavity is formed by the piston and the inner wall of a pipe cavity of the sleeve body; a containing cavity is formed in the side wall of the sleeve body, a hydraulic control system and a circuit assembly are arranged in the containing cavity, and a sealing cover plate is arranged at the opening of the containing cavity;
the hydraulic control system comprises a motor pump valve assembly, a hydraulic control driving electromagnetic valve assembly, a hydraulic control oil return electromagnetic valve assembly, a balance piston oil bag assembly and an oil tank; the motor pump valve assembly comprises a motor and a hydraulic pump connected with the motor, the hydraulic control driving electromagnetic valve assembly is connected with a hydraulic pump oil way and is in signal connection with the circuit assembly, and the hydraulic control oil return electromagnetic valve assembly is in signal connection with the circuit assembly and is connected with a balance piston oil bag assembly oil way;
the circuit assembly comprises a battery pack, an upper electric connector, a processor, a motor driving module, an electromagnetic induction coil and a vibration sensor, wherein the electromagnetic induction coil and a ground start-stop pump sequence signal are respectively connected with the hydraulic control system signal; the ground start-stop pump sequence signal triggers the hydraulic control system to push the piston to open and close the valve plate; the induction signal of the electromagnetic induction coil triggers the hydraulic control system to push the piston to open and close the valve plate.
2. The downhole casing valve measurement and control system of claim 1, wherein one end of the piston is mounted in a piston limit sleeve mounted on a lumen inner wall of the casing body; the piston moves back and forth along the hydraulic oil cavity under the action of hydraulic oil to realize the opening or closing of the valve plate;
one end of the hydraulic oil cavity is provided with a high-pressure oil inlet, and the other end of the hydraulic oil cavity is provided with an oil return port; the hydraulic oil cavity is connected with the hydraulic control system oil way.
3. The downhole casing valve measurement and control system of claim 1, wherein the motor pump valve assembly further comprises an overflow valve block, an inlet end of the hydraulic pump is connected with the oil tank, an outlet end of the hydraulic pump is connected with the oil tank through the overflow valve block, and the overflow valve block comprises an overflow valve and a safety valve which are arranged in parallel.
4. The downhole casing valve measurement and control system of claim 2, wherein the pilot-operated solenoid valve assembly comprises a first solenoid valve and a second solenoid valve, an inlet end of the first solenoid valve is connected to an outlet end of the hydraulic pump, an outlet end of the first solenoid valve is connected to an inlet end of the second solenoid valve and to a high pressure oil inlet, and an outlet end of the second solenoid valve is connected to an oil tank;
the hydraulic control oil return electromagnetic valve assembly comprises a third electromagnetic valve and a fourth electromagnetic valve, wherein the inlet end of the third electromagnetic valve is connected with the outlet end of the hydraulic pump, the outlet end of the third electromagnetic valve is connected with the oil return port and the inlet end of the fourth electromagnetic valve, and the outlet end of the fourth electromagnetic valve is connected with the oil tank.
5. The downhole casing valve measurement and control system of claim 1, wherein the motor is coupled to the processor by a high pressure sealed connector; the processor is internally provided with an instruction receiving and motor control circuit module which is respectively connected with the power supply module, the communication module, the instruction receiving module, the output control module, the clock module and the storage module;
the processor is connected with the hydraulic control driving electromagnetic valve assembly through signals and is connected with the hydraulic control oil return electromagnetic valve assembly through signals, and the processor realizes driving control of the piston through action control of the hydraulic control driving electromagnetic valve assembly and the hydraulic control oil return electromagnetic valve assembly, so that opening and closing control of the valve plate is realized.
6. The downhole casing valve measurement and control system of claim 1, wherein the battery pack is connected with the upper electrical connector, the upper electrical connector is connected with the processor, the processor controls the start and stop of a motor through a motor driving module, and the motor driving module is connected with an electromagnetic induction coil; the processor is in signal connection with the electromagnetic induction coil.
7. The downhole casing valve measurement and control system according to claim 1, wherein the casing body is of a cylindrical structure, the accommodating cavity is a strip-shaped groove cavity formed along the axial direction of the casing body, and the top of the strip-shaped groove cavity is sealed by the sealing cover plate; the outer wall of the sleeve body is provided with a cover plate for covering the electric connector.
8. The downhole casing valve measurement and control system of claim 1, wherein the circuit assembly is in signal communication with a surface control system, the surface control system outputting a surface start-stop pump sequence signal to the circuit assembly;
the electromagnetic induction coil is in signal connection with an electromagnetic sensor arranged at the drill bit, when the electromagnetic sensor detects the change of a surrounding electromagnetic field, the electromagnetic sensor sends out a signal to the electromagnetic induction coil, and the electromagnetic induction coil receives the signal and triggers the hydraulic control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311115582.3A CN117027702A (en) | 2023-08-31 | 2023-08-31 | Underground sleeve valve measurement and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311115582.3A CN117027702A (en) | 2023-08-31 | 2023-08-31 | Underground sleeve valve measurement and control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117027702A true CN117027702A (en) | 2023-11-10 |
Family
ID=88628186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311115582.3A Pending CN117027702A (en) | 2023-08-31 | 2023-08-31 | Underground sleeve valve measurement and control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117027702A (en) |
-
2023
- 2023-08-31 CN CN202311115582.3A patent/CN117027702A/en active Pending
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