A semi-automatic pneumatic directional hydraulic jetting tool for underground radial wells

Abstract

The invention discloses a semi-automatic pneumatic directional hydraulic jetting tool for radial wells in a downhole, which belongs to the technical field of drilling engineering, and comprises a tailstock, a rotator, a fixed sleeve, a toggle and a top cover; the upper part of the rotator is sleeved in the inner hole of the tailstock and the rotator can rotate around the axis and move axially relative to the tailstock, and a plurality of rotating meshing parts are evenly arranged at the bottom of the rotator along the circumferential direction; the fixed sleeve is fixedly connected to the top cover; the toggle is slidably matched inside the fixed sleeve, and a plurality of toggle matching parts corresponding to the rotating meshing parts are arranged at the top of the toggle; a liquid cavity is arranged between the toggle and the top cover; a toggle air cavity is arranged between the toggle and the fixed sleeve, a rotating air cavity is arranged between the rotator and the tailstock, and a water spray hole is arranged on the outer wall of the rotator extending out of the tailstock. The invention can realize fixed-angle rotation in the circumferential direction, rigid cyclic rotation of the directional angle, and no superposition error, thereby completing the directional hydraulic jetting function, and is easy to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling engineering, and in particular relates to a semi-automatic pneumatic directional hydraulic jetting tool for an underground radial well. Background Art

[0002] In the field of oil and gas engineering, directional hydraulic jet drilling technology is gaining more and more attention. Radial well hydraulic jet directional drilling utilizes the hydraulic rock breaking effect of high-pressure jets, through a series of equipment such as ground high-pressure devices, and the collection and sorting of relevant jet data by computers, implements directional hydraulic jet directional perforation, and drills multiple circumferential holes in different directions of the oil layer, with a hole length of up to hundreds of meters.

[0003] The radial well hydraulic jet directional drilling technology can be applied to: near-well contaminated zones, thin layers or thin interlayers, and casing deformed wells; when completion or secondary completion is required in formations with unsatisfactory production increases; when treating water injection wells and sewage wells to improve the injection volume and injection profile; when improving the effects of repeated fracturing and acidizing in fractured or acidified oil fields; and when increasing the steam contact area during heavy oil development.

[0004] Among them, the directional hydraulic jet tool plays a key role in the realization of radial well hydraulic jet directional drilling technology. The directional hydraulic jet tool that can provide precise orientation is helpful for the efficient development of oil and gas fields.

[0005] Based on this, the present application proposes a semi-automatic pneumatic directional hydraulic jetting tool for a downhole radial well, which can achieve a fixed angle rotation in the circumferential direction, thereby completing the directional hydraulic jetting function. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a semi-automatic pneumatic directional hydraulic jetting tool for radial wells downhole.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A semi-automatic pneumatic directional hydraulic jetting tool for radial wells in a downhole, comprising a coaxially arranged tailstock, a rotator, a fixed sleeve, a toggle and a top cover;

[0009] The upper part of the rotator is sleeved in the inner hole of the tailstock and the rotator can rotate around the axis and move axially relative to the tailstock, and the bottom end of the rotator is evenly provided with a plurality of rotating meshing parts along the circumferential direction;

[0010] The bottom end of the fixed sliding sleeve is fixedly connected to the top cover;

[0011] The toggle device is slidably fitted in the fixed sleeve along the axial direction, and a plurality of toggle fitting parts corresponding to the rotating meshing parts are evenly arranged on the top of the toggle device along the circumferential direction;

[0012] A liquid chamber is provided between the bottom end of the actuator and the top end of the top cover, and the liquid chamber is connected to the liquid supply branch;

[0013] A toggle air cavity is provided between the lower outer wall of the toggle device and the inner wall of the fixed sleeve, and the toggle air cavity is connected to the toggle air supply branch;

[0014] A rotating air cavity is provided between the top end of the rotator and the inner wall of the tailstock, and the rotating air cavity is connected to a rotating air supply branch;

[0015] A water spray hole is arranged on the outer side wall of the rotator extending out of the tail seat, and the water spray hole is connected to the hydraulic jet pipeline.

[0016] Preferably, the rotary meshing portion comprises a rotary meshing tooth, a reset tooth, and a reset groove sequentially arranged along the circumferential direction, the bottom end surface of the rotary meshing tooth is a first inclined surface, the bottom end surface of the reset tooth is a second inclined surface, and the first inclined surface and the second inclined surface are arranged in parallel;

[0017] The high end of the first inclined surface is connected to the low end of the second inclined surface through a vertical surface extending axially, the high end of the second inclined surface extends to the corresponding side wall of the adjacent reset groove, and the low end of the first inclined surface extends to the corresponding side wall of the adjacent reset groove.

[0018] Preferably, the toggle matching portion includes a toggle tooth, a guide rib, and a guide groove; the top end surface of the toggle tooth is a third inclined surface that can be matched with the first inclined surface and the second inclined surface, and the top end surface of the guide rib is a fourth inclined surface that can be matched with the first inclined surface and the second inclined surface;

[0019] The lower end of the third inclined surface extends to the corresponding side wall of the adjacent guide groove, the higher end of the third inclined surface is connected to the horizontal surface of the toggle device through a vertical surface extending in the axial direction, and the other end of the horizontal surface is vertically connected to the corresponding side wall of the adjacent guide groove;

[0020] The guide rib is slidably fitted in the guide groove along the axial direction, and the guide rib is fixedly connected to the fixed sliding sleeve.

[0021] Preferably, the length of the radial outer wall surface of the rotating meshing tooth along the circumferential direction is twice the length of the radial outer wall surface of the reset tooth along the circumferential direction, and the length of the radial outer wall surface of the reset tooth along the circumferential direction is consistent with the length of the reset groove along the radial outer wall surface of the rotator in the circumferential direction;

[0022] The length of the radial outer wall surface of the toggle tooth and the guide rib along the circumferential direction is consistent with the length of the radial outer wall surface of the reset tooth along the circumferential direction.

[0023] Preferably, the liquid supply branch includes a first liquid cavity connecting hole arranged in the fixed sleeve and connected to the liquid cavity, a liquid supply tube column connected to the first liquid cavity connecting hole is arranged between the fixed sleeve and the tail seat, and a second liquid cavity connecting hole connected to the liquid supply tube column is arranged in the tail seat.

[0024] Preferably, the toggle air supply branch includes a first connecting hole of the toggle air cavity which is arranged in the fixed sleeve and connected to the toggle air cavity, an air supply pipe column which is connected to the first connecting hole of the toggle air cavity is arranged between the fixed sleeve and the tail seat, and a second connecting hole of the toggle air cavity which is connected to the air supply pipe column is arranged in the tail seat.

[0025] Preferably, the rotating air supply branch includes a rotating air cavity connecting hole which is arranged in the tailstock and connected to the rotating air cavity.

[0026] Preferably, a water inlet annulus is provided between the outer wall of the rotator located inside the tailstock and the inner wall of the tailstock, the water inlet annulus is connected to the hydraulic jet pipeline provided inside the rotator, and a water inlet hole connected to the water inlet annulus is provided on the tailstock.

[0027] Preferably, the second connecting hole of the liquid cavity is connected to a toggle pressure controller for controlling the pressure in the liquid cavity; the rotating air cavity connecting hole is connected to a rotating air cavity pressure controller for controlling the pressure in the rotating air cavity; the second connecting hole of the toggle air cavity is connected to a toggle air cavity pressure controller for controlling the pressure in the toggle air cavity; the water inlet hole is connected to a hydraulic jet controller, and the hydraulic jet controller is connected to a jet water supply system.

[0028] Preferably, 24, 12, 8, 6 or 4 rotating meshing parts are evenly arranged at the bottom end of the rotator along the circumferential direction.

[0029] The beneficial effects of the present invention are:

[0030] The semi-automatic pneumatic directional hydraulic jetting tool for radial wells in the underground well of the present invention can realize fixed-angle rotation in the circumferential direction, rigidly cyclically rotate at the directional angle, and has no superposition error, thereby completing the directional hydraulic jetting function and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0032] Figure 1 It is a schematic structural stereogram of a semi-automatic pneumatic directional hydraulic jetting tool for a downhole radial well according to the present invention;

[0033] Figure 2It is a schematic top view of the structure of the semi-automatic pneumatic directional hydraulic jetting tool for radial wells in the underground well of the present invention;

[0034] Figure 3 yes Figure 2 AA section view;

[0035] Figure 4 yes Figure 2 BB section view;

[0036] Figure 5 It is a schematic diagram of the coordination of the toggle device, the rotator, and the guide rib in the present invention;

[0037] Figure 6 It is a schematic diagram of the coordination of the toggle device and the guide rib in the present invention;

[0038] Figure 7 It is a structural schematic diagram of the rotator in the present invention;

[0039] Figure 8 It is a schematic diagram of the semi-automatic pneumatic directional hydraulic jetting tool for radial wells in the wellbore of the present invention;

[0040] Fig. 9 1 is a schematic diagram of the process of azimuth conversion of the present invention; wherein, (a) is a schematic diagram of the rotator in the current working position, (b) is a schematic diagram of the toggle and the rotator moving up to the high end of the fourth inclined surface on the guide rib and aligning with the low end of the third inclined surface, (c) is a schematic diagram of the rotator after the first rotation, (d) is a schematic diagram of the toggle moving down to the high end of the third inclined surface on the toggle tooth and aligning with the low end of the first inclined surface on the rotating meshing tooth, (e) is a schematic diagram of the rotator after the second rotation, (f) is a schematic diagram of the high end of the fourth inclined surface on the guide rib and aligning with the low end of the third inclined surface, (g) is a schematic diagram of the rotator after the third rotation, (h) is a schematic diagram of the toggle moving down to the high end of the third inclined surface on the toggle tooth and aligning with the low end of the second inclined surface on the reset tooth, (i) is a schematic diagram of the rotator after the fourth rotation, and (j) is a schematic diagram of the rotator reaching the next working position;

[0041] in:

[0042] 1-tailstock, 2-rotator, 3-fixed sleeve, 4-dial, 5-top cover, 6-rotating air cavity connection hole, 7-water inlet hole, 8-liquid cavity second connection hole, 9-dial air cavity second connection hole, 10-water inlet annulus, 11-hydraulic jet pipeline, 12-water jet hole, 13-air supply pipe column, 14-reset groove, 15-rotating air cavity, 16-rotating meshing teeth, 161-first inclined surface, 17-reset teeth, 171-second inclined surface, 18-dial teeth, 181-third inclined surface, 182-horizontal surface, 19-guide ribs, 191-fourth inclined surface, 20-guide groove, 21-dial air cavity first connection hole, 22-liquid cavity first connection hole, 23-dial air cavity, 24-liquid supply pipe column, 25-liquid cavity;

[0043] 26-slider pressure controller, 27-rotating air cavity pressure controller, 28-sliding air cavity pressure controller, 29-hydraulic jet controller, 30-jet water supply system, 31-fixer. DETAILED DESCRIPTION

[0044] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0047] In the present invention, terms such as "connected" and "connection" should be understood in a broad sense, indicating that the connection can be fixed, integral or detachable; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meaning of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0048] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0049] like Figure 1-Figure 8 As shown, a semi-automatic pneumatic directional hydraulic jetting tool for radial wells in a downhole includes a tailstock 1, a rotator 2, a fixed sleeve 3, a toggle 4 and a top cover 5 which are coaxially arranged;

[0050] The upper part of the rotator 2 is sleeved in the inner hole of the tailstock 1 and the rotator 2 can rotate around the axis and move axially relative to the tailstock 1. The bottom end of the rotator 2 is evenly provided with a plurality of rotating meshing parts along the circumferential direction.

[0051] The bottom end of the fixed sleeve 3 is fixedly connected to the top cover 5;

[0052] The toggle 4 is axially slidably fitted inside the fixed sleeve 3, and a plurality of toggle fitting parts corresponding to the rotating meshing parts are evenly arranged on the top of the toggle 4 along the circumferential direction;

[0053] A liquid chamber 25 is provided between the bottom end of the actuator 4 and the top end of the top cover 5, and the liquid chamber 25 is connected to the liquid supply branch;

[0054] A toggle air cavity 23 is provided between the lower outer wall of the toggle device 4 and the inner wall of the fixed sleeve 3, and the toggle air cavity 23 is connected to the toggle air supply branch. Specifically, when the toggle device 4 moves toward the direction close to the tailstock 1, the volume of the toggle air cavity 23 decreases;

[0055] A rotating air cavity 15 is provided between the top end of the rotator 2 and the inner wall of the tailstock 1, and the rotating air cavity 15 is connected to a rotating air supply branch;

[0056] A water spray hole 12 is provided on the outer side wall of the rotator 2 extending out of the tailstock 1 . Specifically, the central axis of the water spray hole 12 extends along the radial direction of the rotator 2 . The water spray hole 12 is connected to a hydraulic jet pipe 11 .

[0057] Preferably, the rotary meshing portion comprises a rotary meshing tooth 16, a reset tooth 17, and a reset groove 14 arranged in sequence along the circumferential direction, the bottom end surface of the rotary meshing tooth 16 is a first inclined surface 161, the bottom end surface of the reset tooth 17 is a second inclined surface 171, and the first inclined surface 161 and the second inclined surface 171 are arranged in parallel;

[0058] The high end of the first inclined surface 161 is connected to the low end of the second inclined surface 171 through a vertical surface extending axially, the high end of the second inclined surface 171 extends to the corresponding side wall of the adjacent reset groove 14, and the low end of the first inclined surface 161 extends to the corresponding side wall of the adjacent reset groove 14.

[0059] Preferably, the toggle matching portion includes a toggle tooth 18, a guide rib 19, and a guide groove 20; the top end surface of the toggle tooth 18 is a third inclined surface 181 that can be matched with the first inclined surface 161 and the second inclined surface 171, and the top end surface of the guide rib 19 is a fourth inclined surface 191 that can be matched with the first inclined surface 161 and the second inclined surface 171;

[0060] The lower end of the third inclined surface 181 extends to the corresponding side wall of the adjacent guide groove 20, the upper end of the third inclined surface 181 is connected to the horizontal surface 182 of the toggle 4 through a vertical surface extending in the axial direction, and the other end of the horizontal surface 182 is vertically connected to the corresponding side wall of the adjacent guide groove 20;

[0061] The guide rib 19 is axially slidably fitted in the guide groove 20 , and the guide rib 19 is fixedly connected to the fixed sleeve 3 .

[0062] Preferably, the length of the radial outer wall surface of the rotating meshing tooth 16 along the circumferential direction is twice the length of the radial outer wall surface of the reset tooth 17 along the circumferential direction, and the length of the outer wall surface of the reset tooth 17 along the circumferential direction is consistent with the length of the reset groove 14 along the circumferential direction of the radial outer wall surface of the rotator 2;

[0063] The length of the radial outer wall surface of the shifting tooth 18 and the guide rib 19 along the circumferential direction is consistent with the length of the radial outer wall surface of the reset tooth 17 along the circumferential direction.

[0064] Preferably, the liquid supply branch includes a first liquid cavity connecting hole 22 arranged in the fixed sleeve 3 and connected to the liquid cavity 25, a liquid supply tube column 24 connected to the first liquid cavity connecting hole 22 is arranged between the fixed sleeve 3 and the tail stock 1, and a second liquid cavity connecting hole 8 connected to the liquid supply tube column 24 is arranged in the tail stock 1.

[0065] Preferably, the toggle air supply branch includes a toggle air cavity first connecting hole 21 which is arranged in the fixed sleeve 3 and connected to the toggle air cavity 23, an air supply pipe column 13 which is connected to the first connecting hole 21 of the toggle air cavity is arranged between the fixed sleeve 3 and the tail seat 1, and a toggle air cavity second connecting hole 9 which is connected to the air supply pipe column 13 is arranged in the tail seat 1.

[0066] Preferably, the rotating air supply branch includes a rotating air cavity connecting hole 6 which is arranged in the tailstock 1 and connected to the rotating air cavity 15 .

[0067] Preferably, a water inlet annulus 10 is provided between the outer wall of the rotator 2 located inside the tail stock 1 and the inner wall of the tail stock 1 , the water inlet annulus 10 is connected to a hydraulic jet pipe 11 provided inside the rotator 2 , and a water inlet hole 7 connected to the water inlet annulus 10 is provided on the tail stock 1 .

[0068] Preferably, Figure 8 As shown, when the jet tool of the present application is installed in the wellbore, it is fixed to the well wall by a fixture 31; the second connecting hole 8 of the liquid chamber is connected to the toggle pressure controller 26 for controlling the pressure in the liquid chamber 25; the rotating air chamber connecting hole 6 is connected to the rotating air chamber pressure controller 27 for controlling the pressure in the rotating air chamber 15; the second connecting hole 9 of the toggle air chamber is connected to the toggle air chamber pressure controller 28 for controlling the pressure in the toggle air chamber 23; the water inlet hole 7 is connected to the hydraulic jet controller 29, and the hydraulic jet controller 29 is connected to the injection water supply system 30.

[0069] The toggle pressure controller 26, the rotary air cavity pressure controller 27, the toggle air cavity pressure controller 28, and the hydraulic jet controller 29 are all connected to the computer.

[0070] Preferably, 24, 12, 8, 6 or 4 rotating meshing parts are evenly arranged at the bottom end of the rotator 2 along the circumferential direction.

[0071] When 24 rotating meshing parts are provided, azimuth operations of 24×15°, 12×30°, 8×45°, 6×60°, 4×90°, 3×120°, 2×180° and other positions with integer multiples of 15° can be performed;

[0072] When 12 rotating meshing parts are provided, azimuth operations of 12×30°, 6×60°, 4×90°, 3×120°, 2×180° and other positions with integer multiples of 30° can be performed;

[0073] When 8 rotating meshing parts are provided, azimuth operations of 8×45°, 4×90°, 2×180° and other positions with integer multiples of 45° can be performed;

[0074] When 6 rotating meshing parts are provided, 6×60°, 3×120°, and 2×180° azimuth operations can be performed;

[0075] When there are 4 rotating meshing parts, 4×90° and 2×180° azimuth operations can be performed;

[0076] Here, 4×90° is taken as an example for explanation, which means that hydraulic jetting operations can be carried out on radial wells in four directions, and the angle between the four radial wells is 90°.

[0077] A semi-automatic pneumatic directional hydraulic jetting tool for radial wells in a downhole, the process of azimuth conversion is as follows:

[0078] When the water spray hole 12 corresponds to the current azimuth angle, that is, when the rotator 2 is in the current working position, Fig. 9As shown in (a), the first inclined surface 161 of the rotating meshing tooth 16 is in contact with the fourth inclined surface 191 of the guide rib 19, and the high end of the first inclined surface 161 is consistent with the high end of the fourth inclined surface 191, and the reset tooth 17 and the toggle tooth 18 are aligned up and down with a gap between them;

[0079] Then, the toggle pressure controller 26 controls the pressure in the liquid chamber 25 to increase, pushing the toggle 4 and the rotator 2 upwards. During the upward movement of the toggle 4 and the rotator 2, the air pressure in the toggle air chamber 23 and the rotating air chamber 15 increases.

[0080] When the toggle 4 and the rotator 2 move upward to the point where the high end of the fourth inclined surface 191 on the guide rib 19 is aligned with the low end of the third inclined surface 181, as shown in FIG. Fig. 9 As shown in (b) of FIG. 1 , the air pressure of the rotating air chamber 15 causes the second inclined surface 171 of the reset tooth 17 to slide along the combined third inclined surface 181 and the fourth inclined surface 191, thereby realizing the first rotation of the rotator 2. After the rotator 2 rotates for the first time, as shown in FIG. Fig. 9 As shown in (c), the second inclined surface 171 is meshed with the fourth inclined surface 191, and the upper end of the shifting tooth 18 is located in the reset groove 14;

[0081] Then, the toggle pressure controller 26 controls the pressure in the liquid chamber 25 to decrease, and the toggle 4 moves downward under the action of the air pressure in the toggle air chamber 23; when the toggle 4 moves downward until the high end of the third inclined surface 181 on the toggle tooth 18 is aligned with the low end of the first inclined surface 161 on the rotating meshing tooth 16, as shown in FIG. Fig. 9 As shown in (d) in FIG. 1 , the air pressure of the rotating air chamber 15 causes the first inclined surface 161 to slide along the third inclined surface 181, thereby realizing the second rotation of the rotator 2. After the rotator 2 rotates for the second time, as shown in FIG. Fig. 9 As shown in (e), the third inclined surface 181 of the toggle tooth 18 is in contact with the first inclined surface 161 of the corresponding rotating meshing tooth 16, and the lower end of the third inclined surface 181 is consistent with the lower end of the first inclined surface 161, and the upper end of the guide rib 19 is located in the reset groove 14;

[0082] Then, the toggle pressure controller 26 controls the pressure in the liquid chamber 25 to increase, pushing the toggle 4 and the rotator 2 upwards. During the upward movement of the toggle 4 and the rotator 2, the air pressure in the toggle air chamber 23 and the rotating air chamber 15 increases.

[0083] When the toggle 4 and the rotator 2 move upward to the point where the high end of the fourth inclined surface 191 on the guide rib 19 is aligned with the low end of the third inclined surface 181, as shown in FIG. Fig. 9 As shown in (f) in FIG. 1 , the air pressure of the rotating air chamber 15 causes the first inclined surface 161 of the rotating meshing tooth 16 to slide along the combined third inclined surface 181 and the fourth inclined surface 191, thereby realizing the third rotation of the rotator 2. After the rotator 2 rotates for the third time, as shown in FIG. Fig. 9 As shown in (g), the third inclined surface 181 and the fourth inclined surface 191 are both in close contact with the corresponding first inclined surface 161;

[0084] Then, the toggle pressure controller 26 controls the pressure in the liquid chamber 25 to decrease, and the toggle 4 moves downward under the action of the air pressure in the toggle air chamber 23; when the toggle 4 moves downward until the high end of the third inclined surface 181 on the toggle tooth 18 is aligned with the low end of the second inclined surface 171 on the reset tooth 17, as shown in FIG. Fig. 9 As shown in (h) in FIG. 1 , the air pressure of the rotating air chamber 15 causes the second inclined surface 171 to slide along the third inclined surface 181 and the first inclined surface 161 to slide along the fourth inclined surface 191, thereby realizing the fourth rotation of the rotator 2. After the rotator 2 rotates for the fourth time, as shown in FIG. Fig. 9 As shown in (i), the first inclined surface 161 is in contact with the fourth inclined surface 191 , and the second inclined surface 171 is in contact with the third inclined surface 181 ;

[0085] Then, the toggle pressure controller 26 controls the pressure in the liquid chamber 25 to decrease. Under the action of the air pressure in the toggle air chamber 23, the toggle 4 moves downward, so that the reset tooth 17 and the toggle tooth 18 are aligned up and down with a gap between them, so that the water spray hole 12 on the rotator 2 rotates to the corresponding next azimuth angle and reaches the next working position. Fig. 9 As shown in (j) in .

[0086] Repeat the above operation to realize the conversion from the current azimuth to the next azimuth.

[0087] The semi-automatic pneumatic directional hydraulic jetting tool for radial wells in the underground well of the present invention can realize fixed-angle rotation in the circumferential direction, rigidly cyclically rotate at the directional angle, and has no superposition error, thereby completing the directional hydraulic jetting function and is easy to operate.

[0088] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not a limitation of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the protection scope of the present invention.

Claims

1. A semi-automatic pneumatic directional hydraulic jetting tool for radial wells downhole, characterized in that: It includes a coaxially arranged tailstock, a rotator, a fixed slide, a toggle and a top cover; The upper part of the rotator is sleeved in the inner hole of the tailstock and the rotator can rotate around the axis and move axially relative to the tailstock, and the bottom end of the rotator is evenly provided with a plurality of rotating meshing parts along the circumferential direction; The bottom end of the fixed sliding sleeve is fixedly connected to the top cover; The toggle device is slidably fitted in the fixed sleeve along the axial direction, and a plurality of toggle fitting parts corresponding to the rotating meshing parts are evenly arranged on the top of the toggle device along the circumferential direction; A liquid chamber is provided between the bottom end of the actuator and the top end of the top cover, and the liquid chamber is connected to the liquid supply branch; A toggle air cavity is provided between the lower outer wall of the toggle device and the inner wall of the fixed sleeve, and the toggle air cavity is connected to the toggle air supply branch; A rotating air cavity is provided between the top end of the rotator and the inner wall of the tailstock, and the rotating air cavity is connected to a rotating air supply branch; A water spray hole is arranged on the outer side wall of the rotator extending out of the tail seat, and the water spray hole is connected to the hydraulic jet pipeline; The rotary meshing portion comprises a rotary meshing tooth, a reset tooth, and a reset groove arranged in sequence along the circumferential direction, the bottom end surface of the rotary meshing tooth is a first inclined surface, the bottom end surface of the reset tooth is a second inclined surface, and the first inclined surface and the second inclined surface are arranged in parallel; The high end of the first inclined surface is connected to the low end of the second inclined surface through a vertical surface extending in the axial direction, the high end of the second inclined surface extends to the corresponding side wall of the adjacent reset groove, and the low end of the first inclined surface extends to the corresponding side wall of the adjacent reset groove; The toggle matching portion includes a toggle tooth, a guide rib, and a guide groove; the top end surface of the toggle tooth is a third inclined surface that can be matched with the first inclined surface and the second inclined surface, and the top end surface of the guide rib is a fourth inclined surface that can be matched with the first inclined surface and the second inclined surface; The lower end of the third inclined surface extends to the corresponding side wall of the adjacent guide groove, the higher end of the third inclined surface is connected to the horizontal surface of the toggle device through a vertical surface extending in the axial direction, and the other end of the horizontal surface is vertically connected to the corresponding side wall of the adjacent guide groove; The guide rib is axially slidably fitted in the guide groove, and the guide rib is fixedly connected to the fixed sleeve; The liquid supply branch includes a first liquid cavity connection hole arranged in the fixed sleeve and connected to the liquid cavity, a liquid supply pipe column connected to the first liquid cavity connection hole is arranged between the fixed sleeve and the tail seat, and a second liquid cavity connection hole connected to the liquid supply pipe column is arranged in the tail seat; The toggle air supply branch includes a first connecting hole of the toggle air cavity which is arranged in the fixed sleeve and connected to the toggle air cavity, an air supply pipe column which is connected to the first connecting hole of the toggle air cavity is arranged between the fixed sleeve and the tail seat, and a second connecting hole of the toggle air cavity which is connected to the air supply pipe column is arranged in the tail seat; The rotating air supply branch includes a rotating air cavity connecting hole which is arranged in the tailstock and connected to the rotating air cavity.

2. The semi-automatic pneumatic directional hydraulic jetting tool for radial wells according to claim 1, characterized in that: The length of the radial outer wall surface of the rotating meshing tooth along the circumferential direction is twice the length of the radial outer wall surface of the reset tooth along the circumferential direction, and the length of the radial outer wall surface of the reset tooth along the circumferential direction is consistent with the length of the reset groove along the circumferential direction of the radial outer wall surface of the rotator; The length of the radial outer wall surface of the toggle tooth and the guide rib along the circumferential direction is consistent with the length of the radial outer wall surface of the reset tooth along the circumferential direction.

3. The semi-automatic pneumatic directional hydraulic jetting tool for radial wells according to claim 1, characterized in that: A water inlet annulus is arranged between the outer wall of the rotator located inside the tailstock and the inner wall of the tailstock. The water inlet annulus is connected to a hydraulic jet pipeline arranged inside the rotator. A water inlet hole connected to the water inlet annulus is arranged on the tailstock.

4. The semi-automatic pneumatic directional hydraulic jetting tool for radial wells according to claim 3, characterized in that: The second connecting hole of the liquid cavity is connected to the toggle pressure controller used to control the pressure in the liquid cavity; the connecting hole of the rotating air cavity is connected to the rotating air cavity pressure controller used to control the pressure in the rotating air cavity; the second connecting hole of the toggle air cavity is connected to the toggle air cavity pressure controller used to control the pressure in the toggle air cavity; the water inlet hole is connected to the hydraulic jet controller, and the hydraulic jet controller is connected to the injection water supply system.

5. The semi-automatic pneumatic directional hydraulic jetting tool for radial wells according to claim 1, characterized in that: The bottom end of the rotator is evenly provided with 24, 12, 8, 6 or 4 rotating meshing parts along the circumferential direction.

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