Self-adaptive drilling fluid force propeller

Abstract

The utility model relates to the technical field of drilling equipment, in particular to a self-adaptive drilling fluid force propeller which comprises a drilling pipe, a piston cavity is arranged in the drilling pipe, a piston driving assembly is arranged in the piston cavity, and drilling fluid is injected into the piston cavity. A diaphragm chamber and an extrusion chamber are further arranged in the drilling pipe between the piston chamber and the oscillator; the piston chamber comprises a closed cylinder, and a cylindrical space of the closed cylinder is internally provided with a sealing cavity formed by a plurality of flexible diaphragms and hard plates; a plurality of position adjusting valve ports are further formed in the wall of the drilling pipe in a communicating mode and located between the diaphragm cavity and the piston cavity. An inertia sensor is fixedly mounted at the axis of the drilling pipe; the position adjusting valve ports are in one-to-one correspondence with the miniature electromagnetic valves in number, and the miniature electromagnetic valves are connected with inertia sensors. According to the hydraulic propeller, the technical problems that the hydraulic propeller provides self-adaptive and adjustable thrust for the drill bit end and the deflection of the drill bit is reduced aiming at different geological stratums in the drilling process are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drilling equipment, specifically, relates to self -adaptation drilling fluid force propeller. BACKGROUND

[0002] In the process of oil drilling, the hydraulic propeller is a kind of key tool, especially in complex well type (such as horizontal well, large displacement well) important role. It is converted into axial thrust by hydraulic system to the pressure of drilling fluid, provides oscillation power for the oscillator, and assists the drill bit to penetrate hard or complex formation. The working principle is that drilling fluid is injected into the propeller by high-pressure pump, the piston or turbine mechanism inside the propeller starts to work, linear or rotary thrust is generated by using drilling fluid, drilling fluid is pushed into the oscillator, the oscillation effect of the oscillator is realized, the kinetic energy and pressure energy of drilling fluid are converted into mechanical energy, which is transmitted to the drill bit through the vibrator, and the drill bit is oscillated.

[0003] In the prior art, the hydraulic propeller can only exert constant pressure on the drilling fluid to transmit constant thrust to the drill bit. When the drill bit drills into different geological formations, the oscillator will change the oscillation amplitude following the formation, and the constant thrust is difficult to maintain the change of the oscillation effect of the oscillator with large amplitude, so that the drill bit is difficult to drill quickly when encountering the formation with large geological change, and the drill bit is more prone to deflection and sticking, therefore, a hydraulic propeller capable of automatically adjusting the thrust size is needed, which can reduce the deflection of the drill bit.

[0004] The utility model discloses a kind of drilling fluid force propeller, and the patent with the utility model discloses a kind of drilling fluid force propeller, which includes hydraulic propeller main body, hydraulic propeller main body is connected with connecting head, and outside is equipped with righting mechanism, and ball is arranged on righting mechanism. The utility model utilizes high-pressure drilling fluid to push first piston rod to move downwards, directly pressurizes drill bit, avoids the problem that drill bit cannot be pressurized when drilling hole and is easy to deflect, in addition, ball is contacted with the well wall of drilling, can stabilize the stabilizing effect of hydraulic propeller main body, enhances the stability when drill bit drills.

[0005] Although the utility model can reduce the deflection of drill bit and righting, but drilling device is always rubbed with drilling channel in the process of drilling, stone debris is always collided with device, so that external righting mechanism and ball are subjected to axial resistance, prone to damage, and piston rod is directly pressurized to drill bit, prone to make piston rod be subjected to the resistance effect of formation transmitted from drill bit, more prone to cause the deflection damage of piston rod. UTILITY MODEL CONTENTS

[0006] The purpose of this application is to provide an adaptive drilling hydraulic thruster that solves the technical problem of providing adaptive and adjustable thrust to the drill bit end and reducing drill bit deflection during drilling for different geological formations.

[0007] To solve the above-mentioned technical problems, the solution adopted in this application is as follows:

[0008] An adaptive drilling hydraulic thruster includes a drill pipe with an oscillator and drill pipe at the front end.

[0009] Preferably, the drilling pipe is further provided with a piston chamber, a piston drive assembly is provided in the piston chamber, and drilling fluid is injected into the piston chamber.

[0010] Preferably, a diaphragm chamber and a compression chamber are further provided in the drilling pipe between the piston chamber and the oscillator.

[0011] Preferably, the piston chamber includes a closed cylinder, and a plurality of flexible diaphragms and rigid plates are disposed within the cylindrical space of the closed cylinder. The individual flexible diaphragms and rigid plates form a sealed cavity through the inner wall of the closed cylinder, and the bottom surface of the sealed cavity is the membrane surface of the flexible diaphragm.

[0012] Preferably, the surface of the flexible diaphragm is configured as the cavity surface of the extrusion chamber.

[0013] Preferably, the drilling pipe wall is also provided with multiple adjustment valve ports, which are evenly arranged along the circumference of the drilling pipe and located between the diaphragm chamber and the piston chamber.

[0014] Preferably, an inertial sensor is fixedly installed at the axis of the drilling pipe.

[0015] Preferably, the number of the adjusting valve ports corresponds one-to-one with the number of miniature solenoid valves, and the miniature solenoid valves are connected to controller two, which is connected to an inertial sensor via a signal line.

[0016] Preferably, the sealing cylinder is coaxially fixed inside the drilling pipe, and the end of the sealing cylinder away from the piston chamber is fixed and seals the cross section inside the drilling pipe. The diameter of the sealing cylinder is smaller than the inner diameter of the drilling pipe.

[0017] Preferably, the cylindrical space inside the sealed cylinder is connected to the space inside the drilling pipe where the oscillator is installed, and a liquid inlet is connected to the cylinder wall of the sealed cylinder.

[0018] Preferably, the plurality of sealing cavities are axially and uniformly arranged inside the drilling pipe, and there is a gap space between adjacent sealing cavities.

[0019] Preferably, the flexible diaphragm and the hard plate are arranged in a ring structure, the center of the sealed cavity formed by the flexible diaphragm and the hard plate is a through hole, and the gap spaces between the plurality of sealed cavities are connected together through the through hole to form a squeezing chamber.

[0020] Preferably, the sealed cavity corresponds to the number of liquid passage valve ports.

[0021] Preferably, the liquid passage valve port corresponds to the number of micro electromagnetic valves, the micro electromagnetic valves are connected to the controller I, the squeezing chamber is provided with a pressure sensing component, and the pressure sensing component is connected to the controller I through a signal line.

[0022] Preferably, the side wall of the sealed cavity is arranged as a closed cylinder wall, the top surface is arranged as a hard plate surface, and the bottom surface is arranged as a flexible diaphragm surface.

[0023] Preferably, the pressure sensing component is a piezoelectric ceramic pressure sensor.

[0024] Preferably, the controller II is connected to the control end of the piston driving assembly.

[0025] Preferably, the piston chamber includes a piston cylinder fixed in the drilling pipe, a piston slidingly arranged in the piston cylinder, and a liquid supply pipe fixed outside the piston cylinder, one end of the liquid supply pipe being connected to a liquid pump and the other end being communicated with the inside of the piston cylinder, and a one-way valve being fixed in the liquid supply pipe.

[0026] Preferably, the flow direction of the one-way valve is from the liquid pump to the inside of the piston cylinder.

[0027] Preferably, a Venturi tube is further arranged in the drilling pipe, and the Venturi tube is located between the squeezing chamber and the oscillator.

[0028] The technical scheme has at least the following advantages and beneficial effects:

[0029] In the utility model, by arranging the diaphragm chamber between the piston chamber and the oscillator, utilizing the plurality of separate sealed cavities in the diaphragm chamber and the flexible diaphragm which can contract and expand on the cavity wall, after the drilling fluid piston is pressurized, different numbers of sealed cavities are opened, so that different numbers of flexible diaphragms expand or contract to change the volume space of the squeezing chamber, and the space of the squeezing chamber is communicated with the space of the oscillator, so that when the space volume of the squeezing chamber is changed by the diaphragm chamber, different thrust sizes are provided for the oscillator; and the pressure sensing component in the squeezing chamber senses the squeezing force and vibration force generated at the drill bit end to control the diaphragm chamber to open the corresponding number of sealed cavities, so that the thrust size is automatically adjusted according to the external formation change.

[0030] The utility model discloses a piston chamber, piston drive assembly, membrane chamber, extrusion chamber, pressure sensing assembly, venturi tube and inertia sensor are arranged in the piston chamber, and the piston drive assembly is connected with the piston chamber, the piston drive assembly is connected with the membrane chamber, the piston drive assembly is connected with the extrusion chamber, the piston drive assembly is connected with the pressure sensing assembly, the piston drive assembly is connected with the venturi tube, the piston drive assembly is connected with the inertia sensor. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is cross section structure schematic diagram of the utility model.

[0032] Figure 2 It is cross section structure schematic diagram of the membrane chamber in the utility model.

[0033] Figure 3 It is structure schematic diagram of the position valve mouth in the utility model.

[0034] Figure 4 It is cross section structure schematic diagram of the inertia sensor in the utility model.

[0035] Figure 5 It is cross section structure schematic diagram of the extrusion chamber in the utility model.

[0036] In the drawing: 1-drilling pipe, 2-piston chamber, 201-piston cylinder, 202-liquid supply pipe, 203-one-way valve, 3-piston drive assembly, 4-membrane chamber, 401-closed cylinder, 402-hard board, 403-liquid valve, 404-flexible diaphragm, 5-extrusion chamber, 6-pressure sensing assembly, 7-venturi tube, 8-inertia sensor, 9-position valve mouth. DETAILED DESCRIPTION

[0037] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative work belong to the scope of protection of the utility model.

[0038] It should be noted that similar reference numerals and letters refer to like items in the accompanying drawings, and therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings. If the terms "center", "upper", "lower", "inner", "outer" and the like refer to the orientation or position shown in the drawings, or are those that are commonly placed when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. It should also be noted that unless otherwise specifically defined and limited, the terms "provided", "mounted", "connected" should be broadly understood, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0039] Embodiment 1

[0040] Please refer to Figures 1-5 The utility model provides a self -adaptation drilling fluid force propeller, including drilling pipe 1, the front end of drilling pipe 1 is provided with oscillator and drill pipe, oscillator drives drill pipe oscillation, utilizes drill pipe to carry out drilling work to outside formation to slide in the drilling pipe 1 driven.

[0041] Drilling pipe 1 still is provided with piston chamber 2, piston chamber 2 is provided with piston drive assembly 3, and piston chamber 2 is injected with drilling fluid, when piston drive assembly 3 drives piston to slide in piston chamber 2, piston will extrude piston chamber 2 space, and the pressure of drilling fluid in drilling pipe 1 is increased, and piston chamber 2 space is communicated with the space of oscillator and drill pipe arranged in the pipe, so that the drilling fluid after pressure increasing can flow into oscillator, and the oscillator is pushed to move repeatedly, and the oscillation function is realized.

[0042] Further, because the piston sliding pressure increasing can only fixed pressure increasing, cannot follow the formation change, and the pressure of drilling fluid is adjusted quickly along with the change of oscillation effect, therefore please refer to Figure 1 And Figure 2 Piston chamber 2 and oscillator are still provided with diaphragm chamber 4 and extrusion chamber 5 in drilling pipe 1 between.

[0043] The diaphragm chamber 4 intercepts the entire space inside the drilling tubing 1, so that the drilling fluid squeezed by the piston can only flow into the diaphragm chamber 4 first, squeezing the diaphragm inside. Each diaphragm then forms the wall of the squeezing chamber 5. The squeezing chamber 5 is connected to the space inside the drilling tubing 1 at the oscillator. When the diaphragm is subjected to the pressure of the drilling fluid, it will expand under pressure, and the space of the squeezing chamber 5 will shrink, so that the drilling fluid inside the chamber will also be pressurized, thereby applying pressurized drilling fluid to the oscillator.

[0044] Specifically, the diaphragm chamber 4 includes a closed cylinder 401, a rigid plate 402, a liquid inlet valve 403, and a flexible diaphragm 404.

[0045] The sealing cylinder 401 is fixed inside the drilling pipe 1. The end of the sealing cylinder 401 away from the piston chamber 2 is fixed and seals the inner section of the drilling pipe 1. The diameter of the sealing cylinder 401 is smaller than the inner diameter of the drilling pipe 1, so that a drilling fluid flow chamber is formed between the side wall of the sealing cylinder 401 and the inner wall of the drilling pipe 1, allowing the drilling fluid to flow to the wall of the sealing cylinder 401.

[0046] The cylindrical space inside the closed cylinder 401 is only connected to the space inside the drilling pipe 1 where the oscillator is installed. The cylinder wall of the closed cylinder 401 is connected to a fluid inlet valve 403, so that the drilling fluid in the oscillator and the piston chamber 2 can be connected through the closed cylinder 401 by opening the fluid inlet valve 403.

[0047] Several flexible diaphragms 404 and rigid plates 402 are axially fixed inside the cylindrical space of the closed cylinder 401. The outer edges of the flexible diaphragms 404 and rigid plates 402 are fixed in the inner wall of the closed cylinder 401, so that each flexible diaphragm 404 and rigid plate 402 forms a separate sealed cavity in the inner wall of the closed cylinder 401. The side wall of the sealed cavity is the cylinder wall of the closed cylinder 401, the top surface is the plate surface of the rigid plate 402, and the bottom surface is the membrane surface of the flexible diaphragm 404. When pressurized drilling fluid is injected into the sealed cavity, only the flexible diaphragm 404 will expand outward under pressure.

[0048] Several sealing cavities are evenly arranged along the axial direction of the drilling pipe 1, and there are gaps between adjacent sealing cavities to avoid the outward expansion of the flexible diaphragm 404 and prevent the expanding flexible diaphragm 404 from being blocked by the rigid plate 402 of the adjacent cavities. Both the flexible diaphragm 404 and the rigid plate 402 are annular, so that after they form a sealing cavity, there is a through hole at the center, which can connect the gaps between several sealing cavities together to form a compression chamber 5. The change in the volume of the space in the compression chamber 5 also corresponds to the expansion range of the flexible diaphragm 404.

[0049] In addition, each sealing cavity is provided with a liquid valve 403, so that the piston chamber 2 can be opened by the liquid valve 403 provided on the side wall of the sealing cylinder 401, and the axial arrangement of several sealing cavities can be opened individually, and the pressure can be increased in different ranges. The liquid valve 403 is fixedly connected with a micro electromagnetic valve, which can quickly open and close the liquid valve 403. Each micro electromagnetic valve is connected with the controller 1, which controls the opening and closing of the liquid valve 403 at different positions. The pressure sensing assembly 6 is also fixedly arranged in the extrusion chamber 5, and the pressure sensing assembly 6 is connected with the controller 1 through a signal line.

[0050] Therefore, in the process of the piston sliding pressure increasing drilling fluid, if the drill pipe is drilled into different strata, the oscillation effect of the oscillator also needs to be adjusted, and the thrust of the drilling fluid also needs to be adjusted. At this time, the controller 1 drives the micro electromagnetic valve to open the liquid valve 403, and controls the opening of different numbers of liquid valves 403, so that different numbers of flexible diaphragms 404 are expanded under pressure, the volume of the sealing cavity is increased, and the space volume of the extrusion chamber 5 outside the sealing cavity is changed, so as to generate different extrusion pressure and provide different pressure drilling fluid for the oscillator.

[0051] The pressure sensing assembly 6 is a piezoelectric ceramic pressure sensor, which can sense impact pressure and vibration force, and can be used in high temperature and high pressure working environment, and is suitable for drilling working environment.

[0052] Specific principles as follows, when the drill pipe drilled into normal hardness formation, the drill pipe drilled into the formation in the tube formed by the extrusion pressure also through the pipe drilling fluid to the pressure sensing component 6, the pressure sensing component 6 feel pressure value in the threshold range, then send a signal to the controller one, the controller one control micro electromagnetic valve open medium number of liquid valve 403, at this time, the piston drive assembly 3 work, extrusion drilling fluid, make flexible diaphragm 404 inflation to extrusion chamber 5 apply normal pressure, so as to oscillator apply normal pressure drilling fluid;

[0053] Further, the drilling pipe 1 through the piston drive assembly 3 pressurized drilling fluid, thus driving the oscillator oscillation, drilling pipe in the process of drilling, the drill pipe will be because of drilling to hard stone or debris layer, lead to the drill pipe in the process of oscillation offset, continue to oscillate drilling, offset drill pipe in the displacement process will gradually offset, and drive the whole drilling pipe 1 and its internal components offset, lead to the drilling angle offset, affect the drilling work.

[0054] Therefore, please refer to Figure 2 And Figure 3 In this embodiment, the drilling pipe 1 pipe wall is also provided with a plurality of valve port 9, a plurality of valve port 9 along the circumferential uniform arrangement of drilling pipe 1, and located between the diaphragm chamber 4 and piston chamber 2, when the valve port 9 open, then will be the piston chamber 2 in the pressurized drilling fluid discharge to the outside of the drilling pipe 1, and use the ejected drilling fluid for drilling pipe 1 apply reverse thrust.

[0055] The closed cylinder 401 of the diaphragm chamber 4 is coaxially arranged with the drilling pipe 1, and the inertial sensor 8 is fixedly arranged at the outer axis of the closed cylinder 401. The inertial sensor 8 is a kind of sensor set for measuring the motion state (such as the attitude angle) of an object based on the inertial principle, mainly including an accelerometer and a gyroscope, and the core principle is based on Newtonian mechanics. The three-dimensional space motion parameters of the carrier are calculated by detecting the inertial motion of the mass block or the phase change of the optical / electrical signal. In the oil drilling, the inertial sensor 8 can feedback the bit attitude in real time, detect whether the deviation angle deviates from the designed track, and send a signal.

[0056] Each adjusting valve port 9 is connected with a separate micro electromagnetic valve for opening and closing, and the micro electromagnetic valves are connected with the controller two. The controller two is connected with the inertial sensor 8 through a signal line.

[0057] During the drilling process, when the drilling pipe 1 deviates to a certain direction, the inertial sensor 8 detects the deviation direction signal and sends a signal to the controller two. The controller two controls the micro electromagnetic valve of the corresponding direction to open the adjusting valve port and spray high-pressure drilling fluid, so as to gradually push the drilling pipe 1 back to the original position in the subsequent drilling process. When the drilling pipe 1 is reset, the inertial sensor 8 does not detect the deviation, and the controller two controls the adjusting valve port to be closed, so that the drilling fluid is not sprayed.

[0058] It is worth noting that the controller two is also connected with the control end of the piston driving assembly 3. When the controller two controls the adjusting valve port to be opened, it also sends a signal to the control end of the piston driving assembly 3, so that the sliding displacement of the piston is increased to keep the pressure of the drilling fluid in the piston chamber 2 high and maintain the pressure boosting effect on each diaphragm chamber 4.

[0059] Because the drilling fluid in the piston chamber 2 is of fixed capacity, when it is discharged outside the pipe, the capacity becomes smaller, and the initial pressure in the piston chamber 2 will be lowered after the subsequent deviation reset. Therefore, the piston chamber 2 includes a piston cylinder 201, a liquid supply pipe 202, and a one-way valve 203.

[0060] The piston cylinder 201 is fixed in the drilling pipe 1, a piston is slidably arranged in the piston cylinder 201, a liquid supply pipe 202 is fixedly arranged outside the piston cylinder 201, one end of the liquid supply pipe 202 is connected with a liquid pump, the other end of the liquid supply pipe 202 is communicated with the inside of the piston cylinder 201, and a one-way valve 203 is fixedly arranged in the liquid supply pipe 202. The liquid pump pumps constant liquid pressure, when the drilling fluid in the piston cylinder 201 is not discharged, the initial pressure of the drilling fluid is consistent with the liquid pressure of the liquid pump, so that the pressure balance of the one-way valve 203 is balanced, and the liquid pump does not supply liquid to the piston cylinder 201; when the drilling fluid is discharged, the subsequent initial pressure of the drilling fluid is less than the liquid pressure of the liquid pump, so that the one-way valve 203 is opened by the liquid pressure of the liquid pump, and new drilling fluid is supplied to the piston cylinder 201 until the pressure balance. When the piston sliding pressurization drilling fluid is carried out, because of the one-way action of the one-way valve 203, the pressurized drilling fluid in the piston cylinder 201 cannot flow back to the liquid supply pipe 202 even if the liquid pressure is greater than the liquid pressure of the liquid pump, so that the normal work of the device is maintained.

[0061] It is worth noting that in the space where the oscillator is arranged in the drilling pipe 1, the drilling fluid inside the drilling pipe 1 generally needs to be replenished in time during the oscillation process, so a separate liquid supply pipe 202 and a one-way valve 203 are arranged in the space of the drilling pipe 1, so that the initial pressure is consistent with the liquid pressure of the liquid pump, and the pressure balance of the one-way valve 203 is maintained.

[0062] Embodiment 2

[0063] A Venturi tube 7 is also fixedly arranged in the drilling pipe 1, and the Venturi tube 7 is located between the extrusion chamber 5 and the oscillator. When the drilling fluid in the extrusion chamber 5 is extruded and moved, the drilling fluid will pass through the Venturi tube 7. Because of the pipeline structure of the Venturi tube 7 which is first contracted and then expanded, the flow rate of the extruded drilling fluid is first increased, and then the thrust is increased. The expansion angle at the outlet reduces the turbulent loss.

[0064] So far, the embodiments of the utility model have been described in detail. In order to avoid shielding the concept of the utility model, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions of the utility model according to the above description, and the scope of the utility model is defined by the appended claims.

Claims

1. An adaptive drilling fluid propulsor comprising a drilling pipe (1), the front end of the drilling pipe (1) being provided with an oscillator and a drill rod, Characterized in that; The drill pipe (1) is further provided with a piston chamber (2) therein, the piston chamber (2) is provided with a piston driving assembly (3) therein, and the piston chamber (2) is filled with drilling fluid; The drill pipe (1) between the piston chamber (2) and the oscillator is further provided with a diaphragm chamber (4) and an extrusion chamber (5); The piston chamber (2) comprises a closed cylinder (401), a plurality of flexible diaphragms (404) and hard plates (402) are arranged in the cylindrical space of the closed cylinder (401), the single flexible diaphragm (404) and the hard plate (402) form a sealed cavity through the inner wall of the closed cylinder (401), and the bottom surface of the sealed cavity is the diaphragm (404) membrane surface; The diaphragm (404) membrane surface is arranged as the cavity surface of the extrusion chamber (5); A plurality of position adjusting valve ports (9) are further arranged in communication on the wall of the drill pipe (1), the plurality of position adjusting valve ports (9) are uniformly arranged along the circumference of the drill pipe (1), and are located between the diaphragm chamber (4) and the piston chamber (2); An inertial sensor (8) is fixedly installed at the axis of the drill pipe (1); The position adjusting valve port (9) corresponds to a micro electromagnetic valve in number, the micro electromagnetic valve is connected with a controller II, and the controller II is connected with the inertial sensor (8) through a signal line.

2. The adaptive drilling fluid propulsor of claim 1, wherein, The closed cylinder (401) is coaxially fixed in the drill pipe (1), one end of the closed cylinder (401) away from the piston chamber (2) is fixed and blocks the inner cross section of the drill pipe (1), and the cylinder diameter of the closed cylinder (401) is smaller than the inner diameter of the drill pipe (1); The cylindrical space in the closed cylinder (401) is in communication with the inner space of the drill pipe (1) provided with the oscillator, and the cylinder wall of the closed cylinder (401) is provided with a liquid passage valve (403) port in communication.

3. The adaptive drilling fluid propulsor of claim 1, wherein, The plurality of sealed cavities are uniformly arranged in the drill pipe (1) in the axial direction, and there is a gap space between adjacent sealed cavities; The flexible diaphragm (404) and the hard plate (402) are arranged in an annular structure, the center of the sealed cavity formed by the flexible diaphragm (404) and the hard plate (402) is a through hole, the gap spaces between the plurality of sealed cavities are connected together through the through hole, and the extrusion chamber (5) is formed together.

4. The adaptive drilling fluid propulsor of claim 3, wherein, The sealed cavity corresponds to the liquid passage valve (403) port in number; The liquid passage valve (403) port corresponds to the micro electromagnetic valve in number, the micro electromagnetic valve is connected with the controller I, the extrusion chamber (5) is provided with a pressure sensing assembly (6), and the pressure sensing assembly (6) is connected with the controller I through a signal line.

5. The self-adapting drilling fluid propulsor of claim 1, wherein, The side wall of the sealed cavity is arranged as the cylinder wall of the closed cylinder (401), the top surface is arranged as the plate surface of the hard plate (402), and the bottom surface is arranged as the diaphragm (404) membrane surface.

6. The self- adaptive drilling fluid propulsor of claim 4, wherein, The pressure sensing assembly (6) is a piezoelectric ceramic pressure sensor.

7. The self-adapting drilling fluid propulsor of claim 1, wherein, The controller II is connected with the control end of the piston driving assembly (3).

8. The self-adapting drilling fluid propulsor of claim 1, wherein, The piston chamber (2) comprises a piston cylinder (201) fixed in the drilling pipe (1), a piston is slidably arranged in the piston cylinder (201), and a liquid supply pipe (202) is fixedly arranged outside the piston cylinder (201), one end of the liquid supply pipe (202) is connected with a liquid pump, the other end is communicated with the inside of the piston cylinder (201), and a one-way valve (203) is fixedly arranged in the liquid supply pipe (202). The one-way valve (203) is arranged in the liquid supply pipe (202) and is arranged in the flow direction from the liquid pump to the inside of the piston cylinder (201).

9. The self-adapting drilling fluid propulsor of claim 1, wherein, The drilling pipe (1) is further provided with a Venturi tube (7), and the Venturi tube (7) is located between the extrusion chamber (5) and the oscillator.

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