Drilling fluid pulse signal pressure automatic control device and control method thereof

Abstract

The invention relates to the technical field of measurement and control instruments while drilling, in particular to a drilling fluid pulse signal pressure automatic control device and a control method thereof.The drilling fluid pulse signal pressure automatic control device comprises a body, a detection driving assembly, a fixing sleeve, a throttling sleeve, a throttling head, a direct-acting rod and a power assembly, the throttling sleeve is arranged on the inner side of the body, and the fixing sleeve is fixedly installed on the left side of the throttling sleeve; a mounting ring groove is formed in the outer side of the left portion of the body, a detection driving assembly is arranged in the mounting ring groove, the detection driving assembly can drive the fixing sleeve to move and can detect drilling fluid pulse pressure data on the inner side of the throttling sleeve, and the throttling head is in an n shape. The device is reasonable and compact in structure and convenient to use, the detection driving assembly is arranged to push the fixing sleeve and the throttling sleeve to move left and right, and the gap between the throttling sleeve and the throttling head is changed, so that the drilling fluid pulse pressure signal strength is increased or reduced, and it is ensured that the drilling fluid signal strength is constant; the device is not interfered by a shaft environment, and the influence of throttling pressure reduction caused by erosion is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of drilling-while-drilling measurement and control instruments, and is an automatic control device for drilling fluid pulse signal pressure and a control method thereof. Background Art

[0002] The drilling fluid pulse signal transmission method is the main way for the current measurement and control while drilling instruments to upload data. It is the only means for ground engineers to communicate with the underground and monitor the drilling conditions during the drilling process. The strength of the drilling fluid pulse signal largely determines the bit error rate of the ground decoding data. The drilling fluid pulsers used in the current measurement and control while drilling instruments are all determined on the ground according to fixed installation dimensions to determine the strength of the downhole pressure signal, and cannot be adjusted underground. With the increase of drilling depth and time, the drilling fluid signal weakens, resulting in the inability to decode on the ground. No signal has become the main fault problem of the current measurement and control while drilling instruments. The main reasons are as follows: First, during the drilling of deep wells and ultra-deep wells, due to the compressibility of the drilling fluid, the intrusion of fluids and bubbles in the wellbore will affect the pressure signal strength of the drilling fluid, which will weaken the pressure signal uploaded to the ground and make it impossible to decode it on the ground; second, during the drilling process, the vibration of the drill bit and drill string and the impact with the well wall will generate interference signals. A large number of interference signals are mixed with the normal drilling fluid pressure signal generated by the instrument. When the pressure signal strength is basically the same, the ground cannot decode it; third, as the well depth increases, due to the compressibility of the drilling fluid, the drilling fluid signal attenuates itself during transmission, and the pressure signal strength is too weak to be decoded normally on the ground; fourth, due to the corrosion of the drilling fluid, the pressure signal generated by the instrument drilling fluid signal generating device itself is too weak to be decoded on the ground. The above situation usually occurs due to multiple couplings. At present, reducing the throttling gap of the drilling fluid pulse device on the ground to ensure the long-term drilling fluid signal strength has become the main means for field engineers. However, since reducing the gap will increase the throttling pressure and the surface pump pressure, the drilling fluid displacement can only be reduced under the condition of a certain surface pump pressure, which brings great risks to ensuring rock carrying and safe drilling. With the exploration and development of deep and ultra-deep wells, there is an urgent need for stable and reliable instruments and safe drilling. Summary of the invention

[0003] The present invention provides a drilling fluid pulse signal pressure automatic control device and a control method thereof, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that the existing drilling fluid signal weakens and cannot be decoded on the ground.

[0004] One of the technical solutions of the present invention is achieved through the following measures: a drilling fluid pulse signal pressure automatic control device, including a main body, a detection drive component, a fixed sleeve, a throttle sleeve, a throttle head, a direct-acting rod and a power component. A throttle sleeve is provided on the inner side of the main body, and a fixed sleeve is fixedly installed on the left side of the throttle sleeve. A mounting ring groove is provided on the outer side of the left part of the main body, and a detection drive component is provided in the mounting ring groove. The detection drive component can drive the fixed sleeve to move and can detect the drilling fluid pulse pressure data inside the throttle sleeve. The throttle head is in a "J" shape, and the left part of the throttle head is located inside the throttle sleeve. A direct-acting rod is fixedly installed on the inner side of the right end of the throttle head. A power component is provided on the right part of the direct-acting rod, and the power component can push the direct-acting rod to move left and right within a fixed stroke.

[0005] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned detection drive component may include a pump, a drive motor, a battery pack, a downhole control circuit, a pressure collection circuit and a pressure sensor connected together from left to right in sequence. A cover plate capable of closing a mounting ring groove is installed on the main body. The mounting ring groove is filled with hydraulic oil. The pressure sensor collection end is connected to the inner side of the throttling sleeve. A first outer ring groove is provided on the outer side of the right end of the fixed sleeve. A split sleeve is provided on the outer side of the middle part of the fixed sleeve, which divides the first outer ring groove into a left cavity and a right cavity. A retaining ring is provided on the inner side of the main body corresponding to the left and right positions of the split sleeve, and the pump output end is connected to the first outer ring groove.

[0006] The above may include two groups of detection drive components, a split sleeve is mounted on the outer side of the middle part of the fixed sleeve, which divides the first outer ring groove into a left cavity and a right cavity, and a retaining ring is provided on the inner side of the main body corresponding to the left and right positions of the split sleeve. The output end of the pump of the first group of detection drive components is connected to the left cavity, and can control the throttling sleeve to move to the left, and the output end of the pump of the second group of detection drive components is connected to the right cavity, and can control the throttling sleeve to move to the right.

[0007] An inner ring groove may be provided on the inner side of the lower end of the fixing sleeve, the outer side of the upper end of the throttling sleeve is located in the inner ring groove, and the fixing sleeve is fixedly installed on the left side of the throttling sleeve by bolts.

[0008] The above-mentioned power assembly may include an outer cylinder and a generator. A second outer ring groove is provided on the outer side of the right end of the linear rod, and the outer cylinder is mounted on the second outer ring groove. The right end of the outer cylinder is located on the right side of the linear rod. A rotating disk, a reducer, a signal motor, a drive circuit, and a power supply circuit connected together are provided in the outer cylinder from left to right. The left side of the rotating disk and the right side of the linear rod form inclined surfaces that can cooperate with each other. Semicircular ball grooves with openings facing each other are provided on the two inclined surfaces. Balls are provided in the ball grooves. A connecting joint is connected to the right end of the outer cylinder, a wire plug joint is connected to the right end of the connecting joint, and a generator is connected to the right end of the wire plug joint.

[0009] The above-mentioned power assembly may also include a flow guide, and the flow guide is provided on the outside of the connecting joint and the wire plug joint, and a plurality of spiral blades are provided on the outside of the flow guide.

[0010] Two sealing rings may be provided at left and right intervals between the above-mentioned main body and the cover plate, a sealing ring is provided between the fixed sleeve and the main body, a sealing ring is provided between the fixed sleeve and the inner side of the split sleeve, a sealing ring is provided between the outer side of the split sleeve and the main body, a sealing ring is provided between the fixed sleeve and the throttling sleeve, two sealing rings are provided at left and right intervals between the throttling sleeve and the main body, four sealing rings are provided at left and right intervals between the linear rod and the outer cylinder, and two sealing rings are provided at left and right intervals between the reducer and the outer cylinder.

[0011] A retaining ring may be provided in the body corresponding to the left side of the fixing sleeve.

[0012] The second technical solution of the present invention is achieved through the following measures: a control method, which is carried out according to the following method. First, the surface writes the pressure control target value into the downhole control circuit according to the setting. After the instrument is put into the well, when the drilling fluid flows, the generator's wheel is driven to rotate to generate current. After being processed by the power circuit, the current is supplied to the drive circuit and the signal motor for use. The drive circuit controls the signal motor to rotate, driving the reducer and the rotating disk to rotate, pushing the direct-acting shaft and the throttle head to move left and right, changing the gap between the throttle head and the throttle sleeve, generating a downhole drilling fluid pulse signal, and the pressure sensor monitors the drilling fluid pulse in real time. When the punching pressure data is consistent with the preset value, the driving motor and pump do not work. When the downhole control circuit monitors that the drilling fluid pulse pressure data is lower than the preset pressure value, the driving motor and pump of the second group of detection driving components are controlled to work, pushing the fixed sleeve to move to the right, reducing the gap between the throttle sleeve and the throttle head, and increasing the intensity of the drilling fluid pressure pulse signal; when the downhole control circuit monitors that the drilling fluid pulse signal pressure value is higher than the preset value, the driving motor and pump of the first group of detection driving components work, pushing the fixed sleeve to move to the left, increasing the gap between the throttle head and the throttle sleeve, and reducing the intensity of the drilling fluid pulse pressure signal.

[0013] The present invention has a reasonable and compact structure and is easy to use. It sets a detection drive component to push the fixed sleeve and the throttle sleeve to move left and right, change the gap between the throttle sleeve and the throttle head, thereby increasing or decreasing the intensity of the drilling fluid pulse pressure signal, ensuring that the drilling fluid signal intensity is constant and is not affected by the wellbore environment interference and erosion to reduce the throttling pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of the left part of an embodiment of the present invention.

[0015] Attached Figure 2 It is a schematic diagram of the front cross-sectional structure of the right part of an embodiment of the present invention.

[0016] The codes in the accompanying drawings are: 1 is the main body, 2 is the cover plate, 3 is the pump, 4 is the drive motor, 5 is the battery pack, 6 is the downhole control circuit, 7 is the pressure acquisition and processing circuit, 8 is the retaining ring, 9 is the bolt, 10 is the fixing sleeve, 11 is the pressure sensor, 12 is the throttling sleeve, 13 is the throttling head, 14 is the direct-acting rod, 15 is the outer cylinder, 16 is the ball, 17 is the rotating disk, 18 is the generator, 19 is the reducer, 20 is the signal motor, 21 is the sealing ring, 22 is the drive circuit, 23 is the power supply circuit, 24 is the adapter joint, 25 is the guide piece, 26 is the wire plug joint, and 27 is the split sleeve. DETAILED DESCRIPTION

[0017] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0018] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0019] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As attached Figure 1 , 2 As shown, the drilling fluid pulse signal pressure automatic control device includes a main body 1, a detection drive component, a fixed sleeve 10, a throttle sleeve 12, a throttle head 13, a linear rod 14 and a power component. A throttle sleeve 12 is provided on the inner side of the main body 1, and the fixed sleeve 10 is fixedly installed on the left side of the throttle sleeve 12. A mounting ring groove is provided on the outer side of the left part of the main body 1, and a detection drive component is provided in the mounting ring groove. The detection drive component can drive the fixed sleeve 10 to move and can detect the drilling fluid pulse pressure data inside the throttle sleeve 12. The throttle head 13 is in a "J" shape, and the left part of the throttle head 13 is located inside the throttle sleeve 12. A linear rod 14 is fixedly installed on the inner side of the right end of the throttle head 13, and a power component is provided on the right part of the linear rod 14. The power component can push the linear rod 14 to move left and right within a fixed stroke.

[0020] When in use, although the power assembly can push the direct-acting rod 14 to drive the throttle head 13 to move left and right, due to various factors, the drilling fluid pulse pressure signal is weakened, resulting in the ground being unable to decode. Therefore, it is necessary to set a detection drive assembly to drive the fixed sleeve 10 and the throttle sleeve 12 to move left and right, thereby reducing the gap between the throttle sleeve 12 and the throttle head 13 on the basis of the power assembly, enhancing the drilling fluid pulse pressure signal, greatly improving the anti-interference ability of the drilling fluid pulse signal used by the drilling measurement and control instrument, and adapting the drilling measurement and control instrument to deep wells and ultra-deep wells for data upload reliability, greatly reducing the bit error rate, and also increasing the gap between the throttle sleeve 12 and the throttle head 13, which helps to delay the erosion damage of the corrosion-resistant parts, improve the erosion resistance and long-life working ability, and greatly reduce the forced drilling caused by instrument signal failure. The present invention takes into account the problems of high impurities and high solid content in the drilling fluid, and designs an up and down direct-acting structure of a large flow channel, which can ensure a more stable signal generation capability, and has higher adaptability to the permeability of large particles and large displacement circulation in the underground environment, which can greatly improve the underground working life and adaptability.

[0021] The above-mentioned drilling fluid pulse signal pressure automatic control device can be further optimized and / or improved according to actual needs: Embodiment 2: As attached Figure 1 As shown, the detection drive assembly includes a pump 3, a drive motor 4, a battery pack 5, a downhole control circuit 6, a pressure collection circuit and a pressure sensor 11 which are connected together from left to right in sequence. A cover plate 2 capable of closing the mounting ring groove is installed on the main body 1. The mounting ring groove is filled with hydraulic oil. The collection end of the pressure sensor 11 is connected to the inner side of the throttling sleeve 12. A first outer ring groove is provided on the outer side of the right end of the fixed sleeve 10. A split sleeve 27 which divides the first outer ring groove into a left cavity and a right cavity is mounted on the outer side of the middle part of the fixed sleeve 10. A retaining ring 8 is provided on the inner side of the main body 1 corresponding to the left and right positions of the split sleeve 27. The output end of the pump 3 is connected to the first outer ring groove.

[0022] The downhole control circuit 6 processes the electricity obtained from the battery pack 5 to power the pressure acquisition and processing circuit 7, and after processing the pressure data obtained from the pressure acquisition circuit, controls the circuit rotation according to the target pressure value. The pressure sensor 11 acquisition circuit processes the original pressure signal collected by the pressure sensor 11, and sends the data to the downhole control circuit 6 for calculation and use through the wire.

[0023] Embodiment 3: As attached Figure 1As shown, it includes two groups of detection drive components. A split sleeve 27 is mounted on the outer middle part of the fixed sleeve 10 to divide the first outer ring groove into a left cavity and a right cavity. A retaining ring 8 is provided on the inner side of the main body 1 corresponding to the left and right positions of the split sleeve 27. The output end of the pump 3 of the first group of detection drive components is connected to the left cavity, and can control the throttling sleeve 12 to move to the left. The output end of the pump 3 of the second group of detection drive components is connected to the right cavity, and can control the throttling sleeve 12 to move to the right.

[0024] By arranging two groups of detection drive components to control different moving directions of the throttle sleeve 12, the control is simple.

[0025] Embodiment 4: As attached Figure 1 As shown, an inner ring groove is provided on the inner side of the lower end of the fixing sleeve 10 , the outer side of the upper end of the throttling sleeve 12 is located in the inner ring groove, and the fixing sleeve 10 is fixedly installed on the left side of the throttling sleeve 12 by bolts 9 .

[0026] This arrangement enhances sealing during use.

[0027] Embodiment 5: As attached Figure 2 As shown, the power assembly includes an outer cylinder 15, a generator 18, a second outer ring groove is provided on the outer side of the right end of the linear rod 14, the outer cylinder 15 is mounted on the second outer ring groove, the right end of the outer cylinder 15 is located on the right side of the linear rod 14, and the outer cylinder 15 is provided with a rotating disk 17, a reducer, a signal motor 20, a drive circuit 22, and a power supply circuit 23 connected together from left to right in sequence. The left side of the rotating disk 17 and the right side of the linear rod 14 form inclined surfaces that can cooperate with each other, and semicircular ball grooves with openings facing each other are provided on the two inclined surfaces. Balls 16 are provided in the ball grooves, and a connecting joint is connected to the right end of the outer cylinder 15, and a wire plug joint 26 is connected to the right end of the connecting joint, and the generator 18 is connected to the wire plug joint 26.

[0028] The generator 18 supplies power to the power circuit 23, the signal motor 20 drives the reducer and the rotating disk 17 to rotate, and the rotating disk 17 pushes the linear rod 14 and the throttle head 13 to move left and right, forming a pulse signal.

[0029] Embodiment 6: As attached Figure 2 As shown, the power assembly further includes a flow guide 25 , and the flow guide 25 is provided on the outside of the connecting joint and the wire plug joint 26 , and a plurality of spiral blades are provided on the outside of the flow guide 25 .

[0030] The guide member 25 restricts the flow direction of the fluid, thereby better driving the wheel on the generator 18 to rotate and ensuring stable power generation.

[0031] Embodiment 7: As attached Figure 1 , 2As shown, two sealing rings 21 are arranged at left and right intervals between the main body 1 and the cover plate 2, a sealing ring 21 is arranged between the fixed sleeve 10 and the main body 1, a sealing ring 21 is arranged between the fixed sleeve 10 and the inner side of the split sleeve 27, a sealing ring 21 is arranged between the outer side of the split sleeve 27 and the main body 1, a sealing ring 21 is arranged between the fixed sleeve 10 and the throttling sleeve 12, two sealing rings 21 are arranged at left and right intervals between the throttling sleeve 12 and the main body 1, four sealing rings 21 are arranged at left and right intervals between the linear rod 14 and the outer cylinder 15, and two sealing rings 21 are arranged at left and right intervals between the reducer and the outer cylinder 15.

[0032] The sealing ring 21 is provided to seal the fluid, thereby preventing the fluid from oscillating and causing movement failure.

[0033] Embodiment 8: As attached Figure 1 As shown, a retaining ring 8 is provided in the main body 1 corresponding to the left position of the fixing sleeve 10 .

[0034] The retaining ring 8 is provided to limit the distance that the fixing sleeve 10 moves to the left.

[0035] Embodiment 9: As attached Figure 1 , 2 As shown, the following method is used. First, the surface writes the pressure control target value into the downhole control circuit 6 according to the setting. After the instrument is put into the well, when the drilling fluid flows, the wheel of the generator 18 is driven to rotate, generating current. After being processed by the power circuit 23, the current is supplied to the drive circuit 22 and the signal motor 20 for use. The drive circuit 22 controls the signal motor 20 to rotate, driving the reducer 19 and the rotating disk 17 to rotate, pushing the direct-acting shaft and the throttle head 13 to move left and right, changing the gap between the throttle head 13 and the throttle sleeve 12, and generating a downhole drilling fluid pulse signal. The pressure sensor 11 monitors the drilling fluid pulse pressure data in real time. When it is consistent with the predicted value, the pressure sensor 11 generates a pressure signal. When the set values ​​are consistent, the drive motor 4 and the pump 3 do not work. When the downhole control circuit 6 detects that the drilling fluid pulse pressure data is lower than the preset pressure value, the drive motor 4 and the pump 3 of the second group of detection drive components are controlled to work, push the fixed sleeve 10 to move to the right, reduce the gap between the throttle sleeve 12 and the throttle head 13, and increase the drilling fluid pressure pulse signal intensity; when the downhole control circuit 6 detects that the drilling fluid pulse signal pressure value is higher than the preset value, the drive motor 4 and the pump 3 of the first group of detection drive components work, push the fixed sleeve 10 to move to the left, increase the gap between the throttle head 13 and the throttle sleeve 12, and reduce the drilling fluid pulse pressure signal intensity.

[0036] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A drilling fluid pulse signal pressure automatic control device, characterized in that It includes a main body, a detection drive component, a fixed sleeve, a throttle sleeve, a throttle head, a linear rod and a power component. A throttle sleeve is provided inside the main body, a fixed sleeve is fixedly installed on the left side of the throttle sleeve, a mounting ring groove is provided outside the left part of the main body, a detection drive component is provided in the mounting ring groove, the detection drive component can drive the fixed sleeve to move and can detect the drilling fluid pulse pressure data inside the throttle sleeve, the throttle head is in a "X" shape, the left part of the throttle head is located inside the throttle sleeve, a linear rod is fixedly installed on the inner side of the right end of the throttle head, a power component is provided on the right part of the linear rod, and the power component can push the linear rod to move left and right within a fixed stroke.

2. The drilling fluid pulse signal pressure automatic control device according to claim 1, characterized in that The detection drive assembly includes a pump, a drive motor, a battery pack, a downhole control circuit, a pressure collection circuit and a pressure sensor which are connected together from left to right in sequence. A cover plate capable of closing a mounting ring groove is installed on the main body. The mounting ring groove is filled with hydraulic oil. The pressure sensor collection end is connected to the inner side of the throttling sleeve. A first outer ring groove is provided on the outer side of the right end of the fixed sleeve. The pump output end is connected to the first outer ring groove.

3. The drilling fluid pulse signal pressure automatic control device according to claim 2 is characterized in that It comprises two groups of detection drive components, a split sleeve is mounted on the outer middle part of the fixed sleeve, which divides the first outer ring groove into a left cavity and a right cavity, and a retaining ring is arranged on the inner side of the main body corresponding to the left and right positions of the split sleeve. The output end of the pump of the first group of detection drive components is connected with the left cavity, and can control the throttling sleeve to move to the left, and the output end of the pump of the second group of detection drive components is connected with the right cavity, and can control the throttling sleeve to move to the right.

4. The automatic control device for drilling fluid pulse signal pressure according to claim 1, 2 or 3, characterized in that An inner ring groove is arranged on the inner side of the lower end of the fixing sleeve, the outer side of the upper end of the throttling sleeve is located in the inner ring groove, and the fixing sleeve is fixedly installed on the left side of the throttling sleeve by bolts.

5. The automatic control device for drilling fluid pulse signal pressure according to claim 1, 2 or 3, characterized in that The power assembly includes an outer cylinder and a generator. A second outer ring groove is provided on the outer side of the right end of the linear rod. The outer cylinder is mounted on the second outer ring groove. The right end of the outer cylinder is located on the right side of the linear rod. A rotating disk, a reducer, a signal motor, a drive circuit, and a power supply circuit are connected together in the outer cylinder from left to right. The left side of the rotating disk and the right side of the linear rod form inclined surfaces that can cooperate with each other. Semicircular ball grooves with openings facing each other are provided on the two inclined surfaces. Balls are provided in the ball grooves. A connecting joint is connected to the right end of the outer cylinder. A wire plug joint is connected to the right end of the connecting joint. A generator is connected to the right end of the wire plug joint.

6. The drilling fluid pulse signal pressure automatic control device according to claim 4, characterized in that The power assembly includes an outer cylinder and a generator. A second outer ring groove is provided on the outer side of the right end of the linear rod. The outer cylinder is mounted on the second outer ring groove. The right end of the outer cylinder is located on the right side of the linear rod. A rotating disk, a reducer, a signal motor, a drive circuit, and a power supply circuit are connected together in the outer cylinder from left to right. The left side of the rotating disk and the right side of the linear rod form inclined surfaces that can cooperate with each other. Semicircular ball grooves with openings facing each other are provided on the two inclined surfaces. Balls are provided in the ball grooves. A connecting joint is connected to the right end of the outer cylinder. A wire plug joint is connected to the right end of the connecting joint. A generator is connected to the right end of the wire plug joint.

7. The automatic control device for drilling fluid pulse signal pressure according to claim 5, characterized in that The power assembly also includes a flow guide, and the flow guide is arranged on the outer side of the connecting joint and the wire plug joint, and a plurality of spiral blades are arranged on the outer side of the flow guide.

8. The drilling fluid pulse signal pressure automatic control device according to claim 6, characterized in that The power assembly also includes a flow guide, and the flow guide is arranged on the outer side of the connecting joint and the wire plug joint, and a plurality of spiral blades are arranged on the outer side of the flow guide.

9. The automatic control device for drilling fluid pulse signal pressure according to claim 6, 7 or 8, characterized in that Two sealing rings are arranged at left and right intervals between the main body and the cover plate, a sealing ring is arranged between the fixed sleeve and the main body, a sealing ring is arranged between the fixed sleeve and the inner side of the split sleeve, a sealing ring is arranged between the outer side of the split sleeve and the main body, a sealing ring is arranged between the fixed sleeve and the throttling sleeve, two sealing rings are arranged at left and right intervals between the throttling sleeve and the main body, four sealing rings are arranged at left and right intervals between the linear rod and the outer cylinder, two sealing rings are arranged at left and right intervals between the reducer and the outer cylinder, or / and, a retaining ring is arranged in the main body corresponding to the left position of the fixed sleeve.

10. A control method using the drilling fluid pulse signal pressure automatic control device as claimed in any one of claims 5 to 9, characterized in that The following method is used. First, the surface writes the pressure control target value into the downhole control circuit according to the setting. After the instrument is put into the well, when the drilling fluid flows, the generator wheel is driven to rotate to generate current. After being processed by the power circuit, it is supplied to the drive circuit and the signal motor for use. The drive circuit controls the signal motor to rotate, driving the reducer and the rotating disk to rotate, pushing the direct-acting shaft and the throttle head to move left and right, changing the gap between the throttle head and the throttle sleeve, and generating a downhole drilling fluid pulse signal. The pressure sensor monitors the drilling fluid pulse pressure data in real time. When it is consistent with the preset value, When the downhole control circuit detects that the drilling fluid pulse pressure data is lower than the preset pressure value, the drive motor and pump of the second group of detection drive components are controlled to work, pushing the fixed sleeve to move to the right, reducing the gap between the throttle sleeve and the throttle head, and increasing the intensity of the drilling fluid pressure pulse signal; when the downhole control circuit detects that the drilling fluid pulse signal pressure value is higher than the preset value, the drive motor and pump of the first group of detection drive components are controlled to work, pushing the fixed sleeve to move to the left, increasing the gap between the throttle head and the throttle sleeve, and reducing the intensity of the drilling fluid pulse pressure signal.

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