An underground motor control system

Abstract

The present invention provides a downhole motor control system. The motor is arranged in an oil and gas well, and a well pipe is arranged in the oil and gas well. The downhole motor control system includes a control terminal and a debugging device; the debugging device is arranged at a position corresponding to the motor in the well pipe. The debugging device includes a microcontroller, a driving unit, and a first information acquisition device. The first information acquisition device is electrically connected to the microcontroller, and the microcontroller is electrically connected to the motor through the driving unit; a valve is arranged at a position on the side wall of the well pipe corresponding to the first information acquisition device. The present invention has the advantages of realizing wireless control of the downhole motor, being able to flexibly control the operation of the downhole motor, and reducing the manufacturing and production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas exploitation, and particularly relates to a downhole motor control system. Background Art

[0002] The efficient, low-cost operation and control technology of downhole motors has always been an important technical problem faced by oil drilling tools. Since oil wells are very deep and the pipe diameters are very small, it is difficult to achieve direct mechanical triggering. Therefore, a wired cable connection method is currently used, which has disadvantages such as high transmission cost, easy corrosion, and inflexible control. Summary of the Invention

[0003] The main purpose of the present invention is to provide a downhole motor control system, which realizes wireless control of the downhole motor, can flexibly control the operation of the downhole motor, and reduces the production and manufacturing costs.

[0004] The present invention provides a downhole motor control system. The motor is arranged in an oil and gas well, and a well pipe is arranged in the oil and gas well. The downhole motor control system includes a control terminal and a debugging device;

[0005] The debugging device is arranged at a position corresponding to the motor in the well pipe. The debugging device includes a microcontroller, a driving unit, and a first information acquisition device. The first information acquisition device is electrically connected to the microcontroller, and the microcontroller is electrically connected to the motor through the driving unit;

[0006] A valve is arranged on the side wall of the well pipe at a position corresponding to the first information acquisition device. The control terminal controls the opening amount of the valve by changing the pressure pulse of the fluid in the well pipe, thereby changing the pressure at a position corresponding to the valve in the well pipe;

[0007] The first information acquisition device real-time collects the pressure information at a position corresponding to the valve in the well pipe and sends it to the microcontroller. The microcontroller operates or sleeps according to the information collected by the first information acquisition device, and the microcontroller can control the operation of the motor when it is operating.

[0008] Preferably, the debugging device further includes an AD chip, and the first information acquisition device is electrically connected to the microcontroller through the AD chip.

[0009] Preferably, the number of the motors is at least two, and at least two motors are arranged at intervals in sequence along the extending direction of the well pipe. The number of the debugging devices is equal to the number of the motors and is connected in one-to-one correspondence.

[0010] Preferably, a valve is provided at a position on the side wall of the well pipe corresponding to the first information collection device in the debugging device. The number of the valves is equal to the number of the first information collection devices and they are connected in one-to-one correspondence.

[0011] Preferably, the debugging device further includes a second information collection device which is arranged at a position corresponding to the debugging device and is electrically connected to the microcontroller;

[0012] The second information collection device collects in real time the formation parameters at its corresponding position in the oil and gas well and sends the formation parameters to the microcontroller. When the microcontroller is in an operating state, the microcontroller can control the motor to work according to the received formation parameters.

[0013] Preferably, the debugging device further includes a signal conditioning device, and the second information collection device is electrically connected to the microcontroller through the signal conditioning device.

[0014] Preferably, the debugging device further includes the memory electrically connected to the microcontroller;

[0015] The memory stores preset values of the formation parameters. The microcontroller compares the received formation parameters with the preset values in the memory and controls the motor to work according to the comparison result.

[0016] Preferably, a fluid driving device is further included. The fluid driving device is communicated with the well pipe and is electrically connected to the control terminal, so that the control terminal can control the fluid driving device to inject fluid into the well pipe or extract the fluid in the well pipe to change the pressure pulse in the well pipe.

[0017] Preferably, a third information collection device is further included;

[0018] When the valve is provided on the side wall of the well pipe, the motor is electrically connected to the valve, so that the valve can adjust the opening amount of the valve under the control of the microcontroller to change the pressure pulse of the fluid in the well pipe;

[0019] The third information collection device is arranged in the upper port of the well pipe and is electrically connected to the control terminal. The third information collection device collects in real time the pressure pulse signal of the fluid in the well pipe and sends it to the control terminal.

[0020] The downhole motor control system provided by the present invention adopts the technical solution that the control terminal controls the opening amount of the valve by changing the pressure pulse of the fluid in the well pipe, thereby changing the pressure at the position corresponding to the valve in the well pipe, and the first information acquisition device collects the pressure information at the position corresponding to the valve in the well pipe in real time and sends it to the microcontroller. The microcontroller operates or sleeps according to the information collected by the first information acquisition device. When the microcontroller is operating, it can control the motor to work, realizing wireless control of the downhole motor, which can not only flexibly control the operation of the downhole motor, but also reduce the production and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and form a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0022] Figure 1 is a schematic structural diagram of an embodiment of the downhole motor control system of the present invention;

[0023] Figure 2 is Figure 1 a schematic diagram of the debugging device in

[0024] In the figure: 1 - motor; 2 - oil and gas well; 3 - well pipe; 31 - valve; 4 - control terminal; 5 - debugging device; 51 - microcontroller; 52 - driving unit; 53 - first information acquisition device; 54 - AD chip; 55 - second information acquisition device; 56 - signal conditioning device; 57 - memory; 6 - driving device; 7 - third information acquisition device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the specific embodiments and corresponding drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Such as Figure 1 and Figure 2As shown in the figure, a downhole motor control system is provided. The motor 1 is disposed in the oil and gas well 2, and a well pipe 3 is arranged in the oil and gas well 2. The downhole motor control system includes a control terminal 4 and a debugging device 5. The debugging device 5 is disposed at a position corresponding to the motor 1 in the well pipe 3. The debugging device 5 includes a microcontroller 51, a driving unit 52, and a first information acquisition device 53. The first information acquisition device 53 is electrically connected to the microcontroller 51, and the microcontroller 51 is electrically connected to the motor 1 through the driving unit 52. A valve 31 is arranged at a position on the side wall of the well pipe 3 corresponding to the first information acquisition device 53. The control terminal 4 controls the opening amount of the valve 31 by changing the pressure pulse of the fluid in the well pipe 3, thereby changing the pressure at the position corresponding to the valve 31 in the well pipe 3. The first information acquisition device 53 collects the pressure information at the position corresponding to the valve 31 in the well pipe 3 in real time and sends it to the microcontroller 51. The microcontroller 51 operates or sleeps according to the information collected by the first information acquisition device 53. When the microcontroller 51 is operating, it can control the motor 1 to work. By adopting such a technical solution, wireless control of the motor 1 inside the oil and gas well 2 can be realized through the control terminal 4 on the ground, which can not only flexibly control the downhole motor to work, but also, compared with the prior art, does not require cable distribution to the downhole, thereby reducing the manufacturing and production costs.

[0027] In actual work, the number of motors 1 is at least two. At least two motors 1 are arranged at intervals in sequence along the extending direction of the well pipe 3. The number of debugging devices 5 is equal to the number of motors 1 and they are connected in one-to-one correspondence. That is to say, each motor 1 is respectively arranged at different layers in the oil and gas well 2. At this time, the number of valves 31 on the side wall of the well pipe 3 is equal to the number of the first information acquisition devices 53 and they are connected in one-to-one correspondence. When in use, when the control terminal 4 controls the fluid in the pipe 3 to generate a pressure pulse signal and issues command data in a certain format, the command contains the address number corresponding to the debugging device 5 at a certain layer. In this way, the microcontroller 51 in the corresponding debugging device 5 is activated and maintained in an operating state, and the microcontrollers 51 in the debugging devices 5 at the sub-target layers are in a sleep (low power consumption) state.

[0028] Further, as Figure 2 shown, the debugging device 5 further includes an AD chip 54. The first information acquisition device 53 is electrically connected to the microcontroller 51 through the AD chip 54. In this way, after the first information acquisition device 53 collects the pressure information, it first sends the information to the AD chip 54. After amplification and comparison processing, binary data is obtained and sent to the microcontroller to analyze the specific command meaning.

[0029] Specifically, as Figure 2As shown in the figure, the debugging device 5 further includes a second information acquisition device 55. The second information acquisition device 55 is arranged at a position corresponding to the debugging device 5 and is electrically connected to the microcontroller 51. The second information acquisition device 55 continuously acquires formation parameters at its corresponding position in the oil and gas well 2 and sends the formation parameters to the microcontroller 51. When the microcontroller 51 is in an operating state, the microcontroller 51 can control the motor 1 to work according to the received formation parameters. The number of the second information acquisition devices 55 can be more than two, and the formation parameters can be specific values such as temperature and pressure. Further, as Figure 2 shown in the figure, the debugging device 5 further includes a signal conditioning device 56. The second information acquisition device 55 is electrically connected to the microcontroller 51 through the signal conditioning device 56. In this way, after the second information acquisition device 55 acquires the formation parameters, it first sends the formation parameters to the signal conditioning device 56. After amplification and comparison processing, binary data is obtained and sent to the microcontroller to analyze the specific command meaning.

[0030] In actual production, the debugging device 5 further includes a memory 57 electrically connected to the microcontroller 51. Before installing the debugging device 5, the debugging device 5 can be connected to a computer on the ground so that the preset values of the formation parameters can be stored in the memory 57 through the computer, and at the same time, the debugging device 5 is debugged. After the debugging device 5 is installed underground, the microcontroller 51 compares the received formation parameters with the preset values in the memory 57 and controls the motor 1 to work according to the comparison result.

[0031] Specifically, as Figure 1 shown in the figure, it further includes a fluid driving device 6. The fluid driving device 6 is communicated with the well pipe 3 and is electrically connected to the control terminal 4, so that the control terminal 4 can control the fluid driving device 6 to inject fluid into the well pipe 3 or extract the fluid in the well pipe 3 to change the pressure pulse in the well pipe 3. The fluid driving device 6 can be a hydraulic pump, but is not limited thereto, and can also be any other device that can achieve the purpose of the invention.

[0032] As an implementable mode, as Figure 1 shown in the figure, it further includes a third information acquisition device 7. When a valve 31 is arranged on the side wall of the well pipe 3, the motor 1 is electrically connected to the valve 31, so that the valve 31 can adjust the opening amount of the valve 31 under the control of the microcontroller 51 to change the pressure pulse of the fluid in the well pipe 3. The third information acquisition device 7 is arranged in the upper port of the well pipe 3 and is electrically connected to the control terminal 4. The third information acquisition device 7 continuously acquires the pressure pulse signal of the fluid in the well pipe 3 and sends it to the control terminal 4. The control terminal 4 can analyze the received pressure pulse signal and display it, so that the operator can monitor the working state and operation environment underground in real time.

[0033] The above embodiments enable the present invention to achieve wireless control of downhole motors, which can not only flexibly control the operation of downhole motors, but also reduce the production and manufacturing costs.

[0034] The above description is only for the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. An underground motor control system, wherein the motor (1) is arranged in an oil and gas well (2), and a well pipe (3) is arranged in the oil and gas well (2), and is characterized in that: It includes a control terminal (4) and a debugging device (5); The debugging device (5) is arranged at a position corresponding to the motor (1) in the well pipe (3). The debugging device (5) includes a microcontroller (51), a driving unit (52) and a first information acquisition device (53). The first information acquisition device (53) is electrically connected to the microcontroller (51), and the microcontroller (51) is electrically connected to the motor (1) through the driving unit (52); A valve (31) is arranged on the side wall of the well pipe (3) at a position corresponding to the first information acquisition device (53). The control terminal (4) controls the opening amount of the valve (31) by changing the pressure pulse of the fluid in the well pipe (3), thereby changing the pressure at the position corresponding to the valve (31) in the well pipe (3); The first information acquisition device (53) continuously acquires the pressure information at the position corresponding to the valve (31) in the well pipe (3) and sends it to the microcontroller (51). The microcontroller (51) operates or sleeps according to the information acquired by the first information acquisition device (53). When the microcontroller (51) is operating, it can control the motor (1) to work; Wherein, The number of the motors (1) is at least two. At least two motors (1) are arranged at intervals in sequence along the extending direction of the well pipe (3). The number of the debugging devices (5) is equal to the number of the motors (1) and they are connected in one-to-one correspondence; The debugging device (5) further includes a second information acquisition device (55). The second information acquisition device (55) is arranged at a position corresponding to the debugging device (5) and is electrically connected to the microcontroller (51); The second information acquisition device (55) continuously acquires the formation parameters at the corresponding position in the oil and gas well (2) and sends the formation parameters to the microcontroller (51). When the microcontroller (51) is in an operating state, the microcontroller (51) can control the motor (1) to work according to the received formation parameters.

2. The underground motor control system according to claim 1, characterized in that: The debugging device (5) further includes an AD chip (54). The first information acquisition device (53) is electrically connected to the microcontroller (51) through the AD chip (54).

3. The underground motor control system according to claim 1, characterized in that: A valve (31) is arranged on the side wall of the well pipe (3) at a position corresponding to the first information acquisition device (53) in the debugging device (5). The number of the valves (31) is equal to the number of the first information acquisition devices (53) and they are connected in one-to-one correspondence.

4. The underground motor control system according to claim 1, characterized in that: The debugging device (5) further includes a signal conditioning device (56), and the second information acquisition device (55) is electrically connected to the microcontroller (51) through the signal conditioning device (56).

5. The downhole motor control system according to claim 1, wherein: The debugging device (5) further includes a memory (57) electrically connected to the microcontroller (51); The memory (57) stores preset values of the formation parameters, and the microcontroller (51) compares the received formation parameters with the preset values in the memory (57) and controls the operation of the motor (1) according to the comparison result.

6. The downhole motor control system according to any one of claims 1 to 4, wherein: It further includes a fluid driving device (6), the fluid driving device (6) is communicated with the well pipe (3) and electrically connected to the control terminal (4), so that the control terminal (4) can control the fluid driving device (6) to inject fluid into the well pipe (3) or extract the fluid in the well pipe (3) to change the pressure pulse in the well pipe (3).

7. The downhole motor control system according to claim 6, wherein: It further includes a third information acquisition device (7); When the valve (31) is provided on the side wall of the well pipe (3), the motor (1) is electrically connected to the valve (31), so that the valve (31) can adjust the opening amount of the valve (31) under the control of the microcontroller (51) to change the pressure pulse of the fluid in the well pipe (3); The third information acquisition device (7) is arranged in the upper port of the well pipe (3) and electrically connected to the control terminal (4), and the third information acquisition device (7) real-time collects the pressure pulse signal of the fluid in the well pipe (3) and sends it to the control terminal (4).

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