CN118361202A

CN118361202A - Sidetrack windowing device and ultra-short radius U-shaped geothermal well drilling method

Info

Publication number: CN118361202A
Application number: CN202410780817.9A
Authority: CN
Inventors: 李富国; 李锋; 张鑫
Original assignee: Daqing Chenping Drilling Technology Service Co ltd
Current assignee: Daqing Chenping Drilling Technology Service Co ltd
Priority date: 2024-06-18
Filing date: 2024-06-18
Publication date: 2024-07-19
Anticipated expiration: 2044-06-18
Also published as: CN118361202B

Abstract

The application provides a sidetrack windowing device and an ultra-short radius U-shaped geothermal well drilling method, and relates to the field of geothermal well drilling. Sidetrack windowing facility: the hydraulic device comprises a mounting barrel assembly, a piston pushing assembly, an anchoring claw assembly, a forward hydraulic component, a unidirectional liquid blocking assembly, a whipstock assembly, a liquid supply conversion assembly and a reverse hydraulic component. The piston pushing assembly is connected to the lower end of the inside of the installation barrel assembly in a sliding mode, the upper end of the piston pushing assembly extends to the upper end of the inside of the installation barrel assembly, the anchoring claw assemblies are arranged on the periphery of the installation barrel assembly at equal intervals, and the upper ends of the anchoring claw assemblies are connected to the upper end of the piston pushing assembly in an inserting mode. The side drilling and windowing device utilizes the piston to push the pressure release at the back of the component so as to smoothly finish the anchoring operation, and utilizes the unidirectional liquid blocking component to keep the pressure of the high-pressure liquid for pushing the anchoring stable, thereby having the effect that the side drilling and windowing device keeps the anchoring state after the releasing tool for supplying liquid is evacuated.

Description

Sidetrack windowing device and ultra-short radius U-shaped geothermal well drilling method

Technical Field

The application relates to the technical field of geothermal well drilling, in particular to a sidetrack windowing device and an ultra-short radius U-shaped geothermal well drilling method.

Background

With the continuous promotion of oil gas development and production, the oil gas wells developed in early stage gradually step into the final stage of economic production, and the number of old wells is increased gradually. The method is an important means for improving the oil and gas recovery ratio by drilling the open window side drilling of the old well to recover the peripheral oil and gas reservoirs. The sidetrack windowing device firstly anchors at a sidetrack windowing position through corresponding anchors, and then guides a windowing drill bit to sidetrack windowing through a whipstock on the anchors.

In the related art, when the sidetrack window opening device is anchored, the anchoring of the fluke is realized through pressure supply, but how to realize the withdrawal of a lower tool for pressure supply in an anchored state after the anchoring is maintained is a technical problem to be solved, and how to release the pressure in the back space of the sliding end during the pressure supply so as to smoothly finish the anchoring is also a technical problem to be considered.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides the sidetracking windowing device and the ultra-short radius U-shaped geothermal well drilling method, wherein the sidetracking windowing device utilizes the pressure release of the back of the piston pushing assembly so as to smoothly complete the anchoring operation, and utilizes the unidirectional liquid blocking assembly to keep the pressure of the high-pressure liquid for pushing the anchoring stable, and the sidetracking windowing device has the effect of keeping the anchoring state after the discharging tool for supplying liquid is evacuated.

In a first aspect, an embodiment of the present application provides a sidetrack windowing apparatus, including: the hydraulic device comprises a mounting barrel assembly, a piston pushing assembly, an anchoring claw assembly, a forward hydraulic component, a unidirectional liquid blocking assembly, a whipstock assembly, a liquid supply conversion assembly and a reverse hydraulic component.

The piston pushing component is connected with the lower end of the inside of the installation barrel component in a sliding way, the upper end of the piston pushing component extends to the upper end of the inside of the installation barrel component, the anchoring claw components are arranged at equal intervals on the periphery of the installation barrel component, the upper end of the anchoring claw components is connected with the upper end of the piston pushing component, the forward liquid passing component is arranged in the inside of the upper end of the installation barrel component, the lower end of the forward liquid passing component is communicated with the inside of the lower end of the installation barrel component, the unidirectional liquid blocking component is arranged in the inside of the forward liquid passing component, the unidirectional liquid blocking component seals the top end of the inside of the installation barrel component, the whipstock component is fixedly connected with the top end of the installation barrel component, the liquid supply conversion component is communicated with the bottom end of the inside of the whipstock component, a liquid supply conversion component can pass through the whipstock component and is connected with the liquid supply conversion component through threads, the reverse liquid passing component is arranged in the inside the installation barrel component, the reverse liquid passing component is screwed into the liquid supply conversion component through the reverse liquid passing component, the reverse liquid passing component is screwed into the liquid passing component, and the liquid passing component is screwed into the reverse liquid passing component through the reverse liquid passing component, and the liquid passing component is screwed into the reverse liquid passing component, the liquid supply of the reverse liquid passing component pushes the top of the unidirectional liquid blocking component to leave the top end inside the installation cylinder component.

According to some embodiments of the application, the installation cylinder assembly comprises an installation cylinder, a partition plate and a sealing sleeve, the partition plate divides the inside of the installation cylinder into an installation cabin and a piston cabin from top to bottom, a concentrated liquid supply hole is formed in the top end of the installation cylinder, the liquid supply conversion assembly is communicated with the concentrated liquid supply hole, sliding grooves are formed in the side wall of the installation cabin at equal intervals, the sealing sleeve is fixedly connected to the periphery of the partition plate at equal intervals, the piston pushing assembly penetrates through the sealing sleeve in a sliding mode, the piston pushing assembly is connected to the piston cabin in a sliding mode, the upper end of the piston pushing assembly extends to the outside of the installation cylinder through the sliding grooves, the lower end of the anchoring claw assembly is hinged to the bottom end of the installation cylinder, the upper end of the anchoring claw assembly is hinged to one end of the outer wall of the installation cylinder, the forward liquid communication assembly is fixedly connected to the top of the installation cabin and the upper side of the partition plate, and the forward liquid communication assembly is communicated with the piston cabin through a first communication hole.

According to some embodiments of the application, the mounting cylinder comprises a mounting cylinder, a closed base, a spring stabilizing cylinder, a first hinge seat and a first limiting block, wherein the closed base is fixedly sleeved at the bottom end of the mounting cylinder, the spring stabilizing cylinder is fixedly connected to the bottom end inside the closed base, the spring stabilizing cylinder is positioned in the piston cabin, the bottom end of the piston pushing assembly is inserted into the spring stabilizing cylinder, the first hinge seat is fixedly connected to the outer wall of the lower end of the closed base, the lower end of the anchoring claw assembly is hinged to the first hinge seat, the first limiting block is fixedly connected to the outer wall of the upper end of the closed base, and the first limiting block can block the lower end of the anchoring claw assembly.

According to some embodiments of the application, the piston pushing assembly comprises a connecting frame, a sliding rod, a piston plate, a first compression spring and an external movable cylinder, wherein the upper end of the sliding rod is fixedly connected to the lower side of the connecting frame, the lower end of the sliding rod penetrates through the sealing sleeve in a sliding manner, the upper side of the piston plate is fixedly connected to the lower end of the sliding rod, the periphery of the piston plate is slidingly connected to the piston cabin, the piston plate is sheathed in the reverse liquid passing assembly in a sliding manner, the lower end of the first compression spring is inserted into the spring stabilizing cylinder, the upper end of the first compression spring presses the lower side of the piston plate, the outer end of the connecting frame penetrates through the sliding groove, the inner wall of the external movable cylinder is fixedly connected to the outer end of the connecting frame, and the upper end of the anchoring claw assembly is hinged to the outer wall of the external movable cylinder.

According to some embodiments of the application, the external movable cylinder comprises an external movable cylinder, a second hinging seat and a second limiting block, wherein the inner wall of the external movable cylinder is fixedly connected to the outer end of the connecting frame, the second hinging seat is fixedly connected to the outer wall of the external movable cylinder, the upper end of the anchoring claw assembly is hinged to the second hinging seat, the second limiting block is fixedly connected to the outer wall of the external movable cylinder, and the second limiting block can block the upper end of the anchoring claw assembly.

According to some embodiments of the application, the anchoring claw assembly comprises an anchoring plate, an upper connecting rod and a lower connecting rod, wherein the upper connecting rod and the lower connecting rod are respectively hinged to the upper end and the lower end of the anchoring plate, the upper end of the upper connecting rod is hinged to the first hinging seat, the first limiting block can block the upper connecting rod, the lower end of the lower connecting rod is hinged to the second hinging seat, and the second limiting block can block the lower connecting rod.

According to some embodiments of the application, the forward liquid passing component comprises an outer isolation cylinder, an isolation plate and an inner isolation cylinder, wherein the upper end of the outer isolation cylinder is fixedly connected to the top of the installation cabin, the lower end of the outer isolation cylinder is fixedly connected to the upper side of the separation plate, the interior of the outer isolation cylinder is communicated with the piston cabin through the first communication hole, the isolation plate divides the interior of the outer isolation cylinder into an upper transition cabin and a lower transition cabin from top to bottom, the upper end of the inner isolation cylinder is fixedly connected to the lower side of the isolation plate, the lower transition cabin is fixedly connected to the upper side of the separation plate, the inner isolation cylinder divides the lower transition cabin into an outer transition cabin and an inner transition cabin from top to bottom, a second communication hole is formed in the periphery of the isolation plate, the upper transition cabin is communicated with the outer transition cabin through the second communication hole, the outer transition cabin is communicated with the piston cabin through the first communication hole, the unidirectional liquid blocking component is arranged in the inner isolation cylinder, the isolation plate is provided with a through hole, and the unidirectional liquid blocking component can be concentrated in the top of the installation component.

According to some embodiments of the present application, the unidirectional liquid blocking component includes a movable rod, a small piston cylinder, a top sealing plate, a sealing pad and a second compression spring, the small piston cylinder and the top sealing plate are fixedly connected to the bottom end and the top end of the movable rod, the small piston cylinder is slidably connected in the inner isolation cylinder, three communication ports on the reverse liquid passing component are communicated with the inner isolation cylinder, the three communication ports of the reverse liquid passing component and the inner isolation cylinder are respectively located at two sides of the small piston cylinder and the bottom end of the inner isolation cylinder, the upper end of the movable rod slidably penetrates through the through hole, the sealing pad is fixedly connected to the upper side of the top sealing plate, the sealing pad compresses and seals the concentrated liquid supply hole, the second compression spring is disposed in the inner isolation cylinder, and the top end of the second compression spring is compressed and pressed at the lower side of the small piston cylinder.

According to some embodiments of the application, the whipstock assembly comprises a whipstock body, the whipstock body is hollow, a communicating groove is formed in the lower end of the side wall of the whipstock body, the top end of the whipstock body is provided with a guiding inclined plane, a penetrating hole is formed in the guiding inclined plane of the whipstock body, and the liquid supply lowering tool is inserted into the whipstock body through the penetrating hole.

In a second aspect, the embodiment of the application further provides a drilling method for an ultra-short radius U-shaped geothermal well, which uses the sidetrack windowing device to perform an anchoring operation before sidetrack windowing, and comprises the following steps:

S1: selecting two vertical wells or inclined wells with the bottom of the well being 900-1100 m away, wherein one well is used as a main well and the other well is used as an auxiliary well;

s2: designing a drilling track of a main drilling well, and selecting a deflecting point, a landing point and a starting point of a butt-joint target area;

S3: designing a drilling track of an auxiliary drilling well, wherein the drilling track comprises a deflecting point, a landing point, a butt joint target area tail point and a complete butt joint point;

S4: designing the position of a butt-joint target area, wherein the distance between the starting point and the tail point of the butt-joint target area is 60-100 meters, and the distance between the starting point and the tail point of the butt-joint target area is 9-11 meters;

S5: respectively windowing in the range of 10-50 meters above 2 shaft target layers, sending the sidetracking windowing device to a designed windowing depth position through the liquid supply lowering tool, carrying out anchoring operation by utilizing the sidetracking windowing device, retracting the liquid supply lowering tool, lowering the sidetracking windowing device, guiding the windowing milling device to carry out windowing sidetracking operation, and keeping the windowing depth from the target layers in the range of 10-50 meters;

s6: drilling a deflecting curved section according to a designed track by using a multi-bending deflecting motor with a deflecting rate of 2-6 degrees/m and a measurement-while-drilling tool with a length of 53mm and an outer diameter of 35-38mm, and landing the deflecting curved section on a target layer;

s7: drilling a horizontal section in a target layer by using a single-bending horizontal motor with the track adjusting capacity of the horizontal section of 0.5-1.5 degrees/m and a measuring tool;

s8: drilling the horizontal section of the auxiliary well to the end point of the butt joint area, and starting the motor;

s9: the auxiliary downhole front end is a drift tube column without a magnetic tube to the bottom of the well, and a gyromagnetic signal probe is arranged in the tube column;

S10: after the main drilling machine drills to the starting point of the butt joint area, the main drilling machine starts out of the motor;

s11: the main well drilling is connected between the motor and the drill bit and then is lowered to the bottom of the well after being magnetically shorted;

S12: the magnetic short circuit of the main drilling machine rotates under the drive of the motor to generate an interactive magnetic source signal, the auxiliary drilling machine detects the interactive magnetic source signal generated by the rotary magnetic source through a probe rod in the non-magnetic pipe, and the space distance between the main drilling machine and the connecting point is continuously calculated and adjusted through the emission and the receiving of the magnetic signal, so that the main drilling machine drills towards the end point target point of the butt joint area;

S13: if the target spot is completely butted at the tail point of the butted area, the U-shaped communication well is drilled; if the butt joint is not successful at the end point target point of the butt joint area, the auxiliary drilling machine drives the drilling tool to gradually retreat, and the main drilling machine continues to drill forwards until the butt joint is successful.

The beneficial effects of the application are as follows: when the anchoring operation is carried out, the liquid supply lowering tool is screwed into the deepest part of the liquid supply conversion assembly, high-pressure liquid is injected into the forward liquid passage assembly through the liquid supply conversion assembly, the top end of the high-pressure liquid pushes the unidirectional liquid blocking assembly to leave the top end of the inside of the installation cylinder assembly through pressure, the high-pressure liquid smoothly enters the forward liquid passage assembly, the high-pressure liquid is input into the upper part of the lower end of the piston pushing assembly in the installation cylinder assembly through the forward liquid passage assembly, the high-pressure liquid pushes the piston pushing assembly to move downwards, the upper end of the piston pushing assembly drives the anchoring claw assembly to prop open for anchoring operation, the back of the lower end of the piston pushing assembly pushes the liquid at the lower end of the installation cylinder assembly to enter the reverse liquid passage assembly, the liquid in the reverse liquid passage assembly is discharged into the whipstock assembly through the liquid supply conversion assembly and then flows into the outside of the whipstock assembly, the liquid at the back of the lower end of the piston pushing assembly is smoothly discharged for pressure release, so that the anchoring operation can be conveniently completed, after the liquid supply is stopped, the unidirectional liquid blocking assembly returns to seal the top end of the inside of the installation cylinder assembly, the high-pressure liquid pushing assembly and the high-pressure liquid of the piston pushing assembly and the pressure liquid from the stable state of the drilling device are maintained after the liquid supply is discharged, and the drilling device is kept at a stable state.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a sidetrack windowing apparatus according to an embodiment of the present application;

FIG. 2 is a schematic perspective view of a connection between a mounting cartridge assembly and a forward liquid communication assembly in accordance with an embodiment of the present application;

FIG. 3 is a schematic perspective view of a mounting cartridge assembly according to an embodiment of the present application;

FIG. 4 is a schematic perspective view of a piston pusher assembly according to an embodiment of the present application;

FIG. 5 is a schematic perspective view of an anchoring jaw assembly according to an embodiment of the application;

FIG. 6 is a schematic perspective view of a forward liquid pass assembly according to an embodiment of the present application;

FIG. 7 is a schematic perspective view of a unidirectional liquid blocking assembly according to an embodiment of the present application;

FIG. 8 is a schematic perspective view of a whipstock assembly according to an embodiment of the application;

FIG. 9 is a schematic perspective view of a liquid supply switching assembly according to an embodiment of the present application;

FIG. 10 is a schematic perspective view of a reverse flow assembly according to an embodiment of the present application;

FIG. 11 is a schematic perspective view of a liquid supply switching outer core member according to an embodiment of the present application;

Fig. 12 is a schematic perspective view of a liquid supply switching core member according to an embodiment of the present application;

fig. 13 is an enlarged perspective view of fig. 10 according to an embodiment of the present application.

Icon: 100-mounting a cartridge assembly; 110-mounting a cartridge; 111-mounting a barrel; 112-closing the base; 113-a spring stabilizing cylinder; 114-a first hinge base; 115-a first limiting block; 120-dividing plates; 130-centralized liquid supply holes; 140-a sliding groove; 150-a first communication hole; 160-a sealing sleeve; 200-a piston pushing assembly; 210-a connecting frame; 220-slide bar; 230-piston plate; 240-a first compression spring; 250-an external movable cartridge; 251-an external movable cylinder; 252-a second hinge seat; 253-a second limiting block; 300-an anchor jaw assembly; 310-anchor plate; 320-upper connecting rod; 330-lower link; 400-forward liquid communication assembly; 410-an outer isolation cylinder; 420-a separator; 430-an inner isolation cylinder; 440-a second communication hole; 450-through holes; 500-a unidirectional liquid blocking component; 510—a movable rod; 520-small piston cylinder; 530-top closure plate; 540-a gasket; 550-a second compression spring; 600-whipstock assembly; 610-whipstock body; 620-a communication groove; 630-guide ramp; 640-through jack; 700-a liquid supply conversion assembly; 710-liquid supply switching outer core member; 711-liquid supply conversion outer core; 712-threaded holes; 713-sliding plug grooves; 714-blocking ring; 715-first channel; 716-a second channel; 717-reverse drain hole; 718-positive displacement holes; 720-liquid supply conversion core member; 721-liquid feed conversion core; 722-an outer seal cartridge; 723-a top seal ring; 724-a liquid supply countersink; 725-reverse feed holes; 726-forward feed hole; 727-draining countersunk head groove; 728-a lateral through hole; 730-a third compression spring; 740-inner core stop bars; 800-a reverse liquid communication assembly; 810-reverse liquid supply pipe fitting; 811-a reverse feed tube; 812-open slot; 820-inner stop collar; 830—one-way check; 831-a sliding guide block; 832-connecting rod; 833—a sealing plate; 834-fourth compression springs; 840-a first liquid inlet pipe; 850-a first outlet pipe; 860-a second outlet pipe.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments of the application, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the application.

The sidetrack windowing device and the ultra-short radius U-shaped geothermal well drilling method according to the embodiment of the application are described below with reference to the accompanying drawings.

Referring to fig. 1 to 13, a sidetrack windowing apparatus and an ultra-short radius U-shaped geothermal well drilling method according to an embodiment of the present application includes: mounting cartridge assembly 100, piston pushing assembly 200, anchoring jaw assembly 300, forward liquid pass assembly 400, unidirectional liquid barrier assembly 500, whipstock assembly 600, liquid supply conversion assembly 700, and reverse liquid pass assembly 800.

Referring to fig. 1, a piston pushing assembly 200 is slidably connected to the lower end of the inside of a mounting cylinder assembly 100, the upper end of the piston pushing assembly 200 extends to the upper end of the inside of the mounting cylinder assembly 100, an anchor claw assembly 300 is disposed at equal intervals around the mounting cylinder assembly 100, the upper end of the anchor claw assembly 300 is connected to the upper end of the piston pushing assembly 200, a forward liquid passing assembly 400 is disposed in the inside of the upper end of the mounting cylinder assembly 100, the lower end of the forward liquid passing assembly 400 is communicated with the inside of the lower end of the mounting cylinder assembly 100, a unidirectional liquid blocking assembly 500 is disposed in the inside of the forward liquid passing assembly 400, the unidirectional liquid blocking assembly 500 seals the top end of the inside of the mounting cylinder assembly 100, the whipstock assembly 600 is fixedly connected to the top end of the installation cylinder assembly 100, the liquid supply conversion assembly 700 is arranged at the bottom end of the inside of the whipstock assembly 600, the liquid supply conversion assembly 700 is communicated with the forward liquid passage assembly 400, a liquid supply lowering tool can penetrate through the whipstock assembly 600 to be connected into the liquid supply conversion assembly 700 through threads, the reverse liquid passage assembly 800 is arranged inside the installation cylinder assembly 100, the upper end of the reverse liquid passage assembly 800 is communicated with the liquid supply conversion assembly 700, the lower end of the reverse liquid passage assembly 800 is communicated with the bottom end of the installation cylinder assembly 100, the lower end of the piston pushing assembly 200 is in sliding sleeve connection with the reverse liquid passage assembly 800, The liquid supply lowering tool performs liquid supply and liquid discharge conversion to the forward liquid passing component 400 and the reverse liquid passing component 800 by screwing in the liquid supply conversion component 700, the reverse liquid passing component 800 is connected to the unidirectional liquid blocking component 500 in the forward liquid passing component 400, and when the forward liquid passing component 400 discharges liquid, the liquid supply of the reverse liquid passing component 800 pushes the top of the unidirectional liquid blocking component 500 to leave the top end inside the installation cylinder component 100. When anchoring operation is performed, the liquid supply lowering tool is screwed into the deepest part of the liquid supply conversion assembly 700, high-pressure liquid is injected into the forward liquid passing assembly 400 through the liquid supply conversion assembly 700, the high-pressure liquid pushes the top end of the unidirectional liquid blocking assembly 500 to leave the top end inside the mounting cylinder assembly 100 through pressure, so that the high-pressure liquid smoothly enters the forward liquid passing assembly 400, the high-pressure liquid is input into the upper part of the lower end of the piston pushing assembly 200 in the mounting cylinder assembly 100 through the forward liquid passing assembly 400, the piston pushing assembly 200 is pushed to move downwards by the high-pressure liquid, the upper end of the piston pushing assembly 200 drives the anchoring claw assembly 300 to prop open for anchoring operation, the liquid at the lower end of the piston pushing assembly 200 pushes the lower end of the installation cylinder assembly 100 to enter the reverse liquid passing assembly 800, the liquid in the reverse liquid passing assembly 800 is discharged into the whipstock assembly 600 through the liquid supply conversion assembly 700 and then flows into the outside of the whipstock assembly 600, so that the liquid at the lower end of the piston pushing assembly 200 is smoothly discharged to perform pressure release, the anchoring operation is smoothly completed, when the liquid supply of the liquid supply lowering tool stops, the unidirectional liquid blocking assembly 500 returns to seal the top end in the installation cylinder assembly 100, the high-pressure liquid and the pressure of the pushing piston pushing assembly 200 are stable, and after the liquid supply lowering tool is evacuated, The sidetrack windowing device maintains an anchored state. the lowering tool for supplying liquid is screwed into the shallowest position of the liquid supplying conversion assembly 700, the lowering tool for supplying liquid injects high-pressure liquid into the reverse liquid passing assembly 800 through the liquid supplying conversion assembly 700, the high-pressure liquid in the reverse liquid passing assembly 800 pushes the lower end of the unidirectional liquid blocking assembly 500, the top end of the unidirectional liquid blocking assembly 500 is separated from the top end in the installation cylinder assembly 100, then the liquid of the unidirectional liquid blocking assembly 500 is pushed to return to the reverse liquid passing assembly 800, the high-pressure liquid in the reverse liquid passing assembly 800 flows into the bottom end in the installation cylinder assembly 100, the high-pressure liquid flowing into the bottom end in the installation cylinder assembly 100 pushes the back of the lower end of the piston pushing assembly 200, The piston pushing assembly 200 moves upwards, the upper end of the piston pushing assembly 200 drives the anchoring claw assembly 300 to retract to release the anchoring operation, the liquid at the upper part of the lower end of the piston pushing assembly 200 enters the forward liquid passing assembly 400, and the liquid in the forward liquid passing assembly 400 is discharged into the whipstock assembly 600 through the liquid supply conversion assembly 700 due to the opening of the unidirectional liquid blocking assembly 500 and then flows into the outside of the whipstock assembly 600.

Referring to fig. 1 to 2, the installation cylinder assembly 100 includes an installation cylinder 110, a partition plate 120 and a sealing sleeve 160, the partition plate 120 divides the interior of the installation cylinder 110 into an installation chamber and a piston chamber from top to bottom, a centralized liquid supply hole 130 is formed at the top end of the installation cylinder 110, a liquid supply conversion assembly 700 is communicated with the centralized liquid supply hole 130, sliding grooves 140 are formed at the side wall of the installation chamber at equal intervals, the sealing sleeve 160 is fixedly connected with the periphery of the partition plate 120 at equal intervals, a piston pushing assembly 200 penetrates through the sealing sleeve 160 in a sliding manner, the piston pushing assembly 200 is slidingly connected with the piston chamber, the upper end of the piston pushing assembly 200 extends to the outside of the installation cylinder 110 through the sliding grooves 140, the lower end of an anchoring claw assembly 300 is hinged to the bottom end of the installation cylinder 110, the upper end of the anchoring claw assembly 300 is hinged to the end of the outer wall of the installation cylinder 110, a forward liquid communication assembly 400 is fixedly connected with the top of the installation chamber and the upper side of the partition plate 120, and the forward liquid communication assembly 400 is communicated with the piston chamber through a first communication hole 150. The liquid supply lowering tool inputs high-pressure liquid into the concentrated liquid supply hole 130 through the liquid supply conversion assembly 700, the high-pressure liquid supplies liquid into the forward liquid passing assembly 400 through the concentrated liquid supply hole 130, the forward liquid passing assembly 400 supplies liquid to the upper end of the piston cabin through the first communication hole 150, the piston pushing assembly 200 pushes the liquid at the lower end of the piston cabin to be discharged into the whipstock assembly 600 through the reverse liquid passing assembly 800 matched with the liquid supply conversion assembly 700, and then flows into the outside of the whipstock assembly 600 to be anchored, and the back pressure of the piston pushing assembly 200 is released. When the liquid supply lowering tool supplies liquid to the lower end of the piston cabin through the liquid supply conversion assembly 700 and the reverse liquid passage assembly 800, the piston pushing assembly 200 pushes the liquid at the upper end of the piston cabin to flow into the forward liquid passage assembly 400 through the first communication hole 150, the liquid in the forward liquid passage assembly 400 flows to the liquid supply conversion assembly 700 through the concentrated liquid supply hole 130, and then the liquid is discharged into the whipstock assembly 600 through the liquid supply conversion assembly 700 and then flows into the outside of the whipstock assembly 600, and when the anchoring is released, the pressure at the upper part of the piston pushing assembly 200 is released.

Referring to fig. 1 to 3, the mounting barrel 110 includes a mounting barrel 111, a sealing base 112, a spring stabilizing barrel 113, a first hinge base 114 and a first limiting block 115, wherein the sealing base 112 is fixedly sleeved at the bottom end of the mounting barrel 111, the spring stabilizing barrel 113 is fixedly connected at the bottom end inside the sealing base 112, the spring stabilizing barrel 113 is located in a piston cabin, the bottom end of the piston pushing assembly 200 is inserted into the spring stabilizing barrel 113, the first hinge base 114 is fixedly connected to the outer wall of the lower end of the sealing base 112, the lower end of the anchoring claw assembly 300 is hinged to the first hinge base 114, the first limiting block 115 is fixedly connected to the outer wall of the upper end of the sealing base 112, and the first limiting block 115 can block the lower end of the anchoring claw assembly 300. The closing base 112 closes the bottom end of the mounting cylinder 111, so that the piston chamber is in a closed state. When the anchoring claw assembly 300 is unfolded, the lower end of the anchoring claw assembly 300 swings outwards around the first hinging seat 114, and when the anchoring claw assembly 300 is retracted, the lower end of the anchoring claw assembly 300 swings inwards around the first hinging seat 114 to the first limiting block 115 to block the lower end of the anchoring claw assembly 300, so that the lower end of the anchoring claw assembly 300 keeps an outwards swinging angle, and the occurrence of inwards swinging of the lower end of the anchoring claw assembly 300 is reduced.

Referring to fig. 1 to 4, the piston pushing assembly 200 includes a connecting frame 210, a sliding rod 220, a piston plate 230, a first compression spring 240 and an external movable cylinder 250, wherein the upper end of the sliding rod 220 is fixedly connected to the lower side of the connecting frame 210, the lower end of the sliding rod 220 is slidably penetrated through the sealing sleeve 160, the upper side of the piston plate 230 is fixedly connected to the lower end of the sliding rod 220, the periphery of the piston plate 230 is slidably connected to the piston chamber, the piston plate 230 is slidably sleeved on the reverse hydraulic assembly 800, the lower end of the first compression spring 240 is inserted into the spring stabilizing cylinder 113, the upper end of the first compression spring 240 is tightly pressed against the lower side of the piston plate 230, the outer end of the connecting frame 210 passes through the sliding groove 140, the inner wall of the external movable cylinder 250 is fixedly connected to the outer end of the connecting frame 210, and the upper end of the anchoring claw assembly 300 is hinged to the outer wall of the external movable cylinder 250. When the forward hydraulic assembly 400 supplies liquid to the piston chamber on the upper side of the piston plate 230 through the first communication hole 150, the high-pressure liquid pushes the piston plate 230 to move downwards, the first compression spring 240 is increased by the compression elastic force, the liquid in the piston chamber on the lower side of the piston plate 230 is discharged through the reverse hydraulic assembly 800, the piston plate 230 drives the sliding rod 220 to slide along the sealing sleeve 160, the sliding rod 220 drives the connecting frame 210, the connecting frame 210 drives the external movable barrel 250 to move downwards, and the external movable barrel 250 drives the anchoring claw assembly 300 to prop open. When the reverse hydraulic flow assembly 800 supplies liquid to the piston chamber on the upper side of the piston plate 230, the piston plate 230 moves upward under the double pushing action of the first compression spring 240 and the high-pressure liquid, the liquid in the piston chamber on the upper side of the piston plate 230 is discharged through the forward hydraulic flow assembly 400, the piston plate 230 drives the outer movable barrel 250 to move upward, and the outer movable barrel 250 drives the anchoring claw assembly 300 to retract.

Referring to fig. 1 to 4, the external movable barrel 250 includes an external movable barrel 251, a second hinge base 252 and a second stopper 253, wherein an inner wall of the external movable barrel 251 is fixedly connected to an outer end of the connecting frame 210, the second hinge base 252 is fixedly connected to an outer wall of the external movable barrel 251, an upper end of the anchoring claw assembly 300 is hinged to the second hinge base 252, the second stopper 253 is fixedly connected to an outer wall of the external movable barrel 251, and the second stopper 253 can block an upper end of the anchoring claw assembly 300. As the outer movable barrel 250 moves downward, the upper end of the anchoring jaw assembly 300 swings outwardly about the second hinge base 252, and the anchoring jaw assembly 300 is spread apart. When the external movable barrel 250 moves upwards, the upper end of the anchoring claw assembly 300 swings inwards around the second hinging seat 252 until the second limiting block 253 blocks the upper end of the anchoring claw assembly 300, so that the upper end of the anchoring claw assembly 300 keeps an outward swinging angle, and the occurrence of inward swinging of the upper end of the anchoring claw assembly 300 is reduced.

Referring to fig. 1 to 5, the anchoring claw assembly 300 includes an anchor plate 310, an upper link 320 and a lower link 330, the upper link 320 and the lower link 330 are respectively hinged to the upper and lower ends of the anchor plate 310, the upper end of the upper link 320 is hinged to the first hinge base 114, the first limiting block 115 can block the upper link 320, the lower end of the lower link 330 is hinged to the second hinge base 252, and the second limiting block 253 can block the lower link 330. When the external movable barrel 250 moves downwards, the upper end of the upper connecting rod 320 rotates around the second hinging seat 252, the lower end of the upper connecting rod 320 swings outwards, the lower end of the lower connecting rod 330 rotates around the first hinging seat 114, the upper end of the lower connecting rod 330 swings outwards, the upper connecting rod 320 and the lower connecting rod 330 push the anchor plate 310 to push out outwards, and the anchor plate 310 compresses the well wall to complete anchoring. When the external movable barrel 250 moves upwards, the upper end of the upper connecting rod 320 rotates around the second hinging seat 252, the lower end of the upper connecting rod 320 swings inwards until the second limiting block 253 blocks the upper connecting rod 320, at this time, the upper connecting rod 320 keeps an outwards swinging angle, the lower end of the lower connecting rod 330 rotates around the first hinging seat 114, the upper end of the lower connecting rod 330 swings inwards until the first limiting block 115 blocks the lower connecting rod 330, at this time, the outwards swinging angle of the lower connecting rod 330 is kept, when the upper connecting rod 320 swings, the inwards swinging angle is reduced, and the anchor plate 310 can be conveniently and smoothly pushed out when being anchored next time. The upper link 320 and the lower link 330 drive the anchor plate 310 to retract inward, the anchor plate 310 leaves the well wall, and the anchoring is released.

Referring to fig. 1 to 6, the forward liquid passing assembly 400 includes an outer isolation cylinder 410, an isolation plate 420 and an inner isolation cylinder 430, wherein the upper end of the outer isolation cylinder 410 is fixedly connected to the top of the installation cabin, the lower end of the outer isolation cylinder 410 is fixedly connected to the upper side of the partition plate 120, the inside of the outer isolation cylinder 410 is communicated with the piston cabin through a first communication hole 150, the isolation plate 420 divides the inside of the outer isolation cylinder 410 into an upper transition cabin and a lower transition cabin from top to bottom, the upper end of the inner isolation cylinder 430 is fixedly connected to the lower side of the isolation plate 420, the lower end of the inner isolation cylinder 430 is fixedly connected to the upper side of the partition plate 120, the lower transition cabin is divided into an outer transition cabin and an inner transition cabin from top to bottom by the inner isolation cylinder 430, a second communication hole 440 is formed in the periphery of the isolation plate 420, the upper transition cabin is communicated with the piston cabin through the first communication hole 150, the unidirectional liquid blocking assembly 500 is arranged in the inner isolation cylinder 430, a through hole 450 is formed in the isolation plate 420, the upper end of the unidirectional liquid blocking assembly 500 slides through the through hole 450, and the top end of the unidirectional liquid blocking assembly 500 can intensively seal the installation hole 110. When the forward liquid passage assembly 400 is supplied with liquid, high-pressure liquid flows into the upper transition chamber through the concentrated liquid supply hole 130, high-pressure liquid in the upper transition chamber flows into the outer transition chamber through the second communication hole 440, high-pressure liquid in the outer transition chamber flows into the piston chamber on the upper side of the piston plate 230 through the through hole 450 for pressure supply, liquid in the piston chamber on the lower side of the piston plate 230 is discharged through the reverse liquid passage assembly 800, and pressure release of the piston chamber on the lower side of the piston plate 230 is performed. Conversely, when the reverse flow passage assembly 800 is supplied with liquid, the liquid in the upper piston chamber of the piston plate 230 is discharged through the through hole 450, the outer transition chamber, the second communication hole 440, the upper transition chamber, and the concentrated liquid supply hole 130 in this order, and the pressure in the upper piston chamber of the piston plate 230 is released.

Referring to fig. 1 to 7, the unidirectional liquid blocking assembly 500 includes a movable rod 510, a small piston cylinder 520, a top sealing plate 530, a sealing pad 540 and a second compression spring 550, wherein the small piston cylinder 520 and the top sealing plate 530 are fixedly connected to the bottom end and the top end of the movable rod 510, the small piston cylinder 520 is slidably connected to the inner isolation cylinder 430, three communication ports on the reverse liquid passing assembly 800 are communicated with the inner isolation cylinder 430, the three communication ports of the reverse liquid passing assembly 800 and the inner isolation cylinder 430 are respectively located at two sides of the small piston cylinder 520 and the bottom end of the inner isolation cylinder 430, the upper end of the movable rod 510 slidably penetrates through the through hole 450, the sealing pad 540 is fixedly connected to the upper side of the top sealing plate 530, the sealing pad 540 tightly seals the concentrated liquid supply hole 130, the second compression spring 550 is disposed in the inner isolation cylinder 430, and the top end of the second compression spring 550 is tightly pressed to the lower side of the small piston cylinder 520. When the liquid supply lowering tool supplies liquid to the concentrated liquid supply hole 130, the top sealing plate 530 is pushed by high-pressure liquid, the top sealing plate 530 drives the sealing gasket 540 to leave the concentrated liquid supply hole 130, the concentrated liquid supply hole 130 is communicated, the movable rod 510 slides along the through hole 450, the small piston cylinder 520 slides in the inner isolation cylinder 430 along with the movable rod 510, the second compression spring 550 is compressed, after liquid supply is stopped, the small piston cylinder 520 pushes the sealing gasket 540 on the top sealing plate 530 to compress and seal the concentrated liquid supply hole 130 again under the elastic force of the second compression spring 550, so that the pressure loss of the high-pressure liquid is reduced, and the anchoring state of the anchoring claw assembly 300 is maintained conveniently. When the liquid supply lowering tool supplies liquid to the reverse liquid passing assembly 800, high-pressure liquid flows into the inner isolation cylinder 430 through the reverse liquid passing assembly 800, the high-pressure liquid pushes the small piston cylinder 520 to move downwards, the small piston cylinder 520 drives the sealing gasket 540 on the top sealing plate 530 to leave the concentrated liquid supply hole 130, the concentrated liquid supply hole 130 is conducted, the liquid in the piston cabin on the upper side of the piston plate 230 is conveniently discharged, the pressure is conveniently released, the high-pressure liquid flows back to the reverse liquid passing assembly 800 after the high-pressure liquid of the reverse liquid passing assembly 800 pushes the small piston cylinder 520 to flow into the piston cabin on the lower side of the piston plate 230 through the bottom end of the reverse liquid passing assembly 800, the high-pressure liquid pushes the piston plate 230 to move upwards, and the piston plate 230 drives the anchoring claw assembly 300 to retract through the connecting frame 210 and the external movable cylinder 250 to release the anchoring state.

Referring to fig. 1 to 8, the whipstock assembly 600 includes a whipstock body 610, the whipstock body 610 is hollow, a communication groove 620 is formed at a lower end of a sidewall of the whipstock body 610, a guiding inclined plane 630 is formed at a top end of the whipstock body 610, a penetrating hole 640 is formed on the guiding inclined plane 630 of the whipstock body 610, and a liquid supply lowering tool is inserted into the whipstock body 610 through the penetrating hole 640. The guide ramp 630 of the whipstock body 610 guides the window mill for sidetrack window. The liquid flowing into the inside of the whipstock body 610 flows into the outside of the whipstock body 610 through the communication groove 620.

Referring to fig. 1 to 11, after anchoring is completed, the sidetrack window opening device in the related art needs to release corresponding pressure to release the anchoring, after the pressure is released, the anchor fluke returns through the spring, if the spring force is insufficient or fails, the anchor fluke cannot return in time, and when the sidetrack window opening device exits, the anchor fluke is easy to be blocked, one of the sidetrack window opening devices releases corresponding pressure after the anchoring is completed, the problem of solving the anchoring is solved, and the other of the sidetrack window opening devices increases the external force of the returning on the basis of the existing spring returning, so that the anchor fluke returns in time is also the technical problem to be solved.

In this embodiment, the liquid supply conversion assembly 700 includes a liquid supply conversion outer core member 710, a liquid supply conversion inner core member 720, a third compression spring 730 and an inner core limiting rod 740, wherein the liquid supply conversion outer core member 710 is fixedly connected to the bottom end inside the whipstock body 610, the bottom end of the liquid supply conversion outer core member 710 is communicated with the concentrated liquid supply hole 130, the inner core limiting rod 740 is slidably connected inside the liquid supply conversion outer core member 710, the third compression spring 730 is disposed inside the liquid supply conversion inner core member 720, the upper end of the third compression spring 730 is pressed on the lower side of the liquid supply conversion inner core member 720, the lower end of the inner core limiting rod 740 is fixedly connected to the bottom end inside the whipstock body 610, and the upper end of the inner core limiting rod 740 is slidably inserted inside the liquid supply conversion inner core member 720.

Referring to fig. 1 to 11, the reverse liquid communication assembly 800 includes a reverse liquid supply pipe 810, an inner limit ring 820, a one-way check member 830, a first liquid inlet pipe 840, a first liquid outlet pipe 850 and a second liquid outlet pipe 860, wherein the lower end of the reverse liquid supply pipe 810 is fixedly connected to the bottom end of the piston cabin, the upper end of the reverse liquid supply pipe 810 is fixedly connected to the top end of the mounting barrel 110, the top end of the reverse liquid supply pipe 810 is communicated with the liquid supply conversion outer core 710, the liquid supply lower release tool is tightly pressed against the liquid supply conversion inner core 720 by screwing in the liquid supply conversion outer core 710, the liquid supply conversion inner core 720 is positioned at the lower end of the liquid supply conversion outer core 710, the liquid supply lower release tool is communicated with the concentrated liquid supply hole 130 by the liquid supply conversion inner core 720 and the liquid supply conversion outer core 710, the top end of the reverse liquid supply pipe 810 is communicated with the concentrated liquid supply hole 130 by the liquid supply conversion outer core 710, the first liquid outlet pipe 860 is fixedly connected to the second liquid outlet pipe 860, the second liquid outlet pipe 860 is fixedly connected to the inner end of the reverse liquid inlet pipe 860, the reverse liquid supply pipe 810 is fixedly connected to the inner end of the second liquid outlet pipe 860 by the reverse liquid supply pipe 860, the reverse liquid supply pipe 810 is fixedly connected to the inner core 850, the upper end of the liquid supply pipe 810 is fixedly arranged at the upper end of the liquid supply conversion inner core 720, the upper end of the liquid supply conversion inner core 710 is fixedly arranged at the top of the liquid supply conversion outer core 710, the liquid supply pipe 710 is communicated with the top end of the liquid supply pipe 710, and the liquid outlet pipe 810 is fixedly arranged at the top end of the liquid inlet pipe end of the liquid supply pipe 810, and the liquid inlet pipe is communicated with the liquid inlet pipe end, and the liquid outlet pipe is tightly, and the liquid inlet pipe is communicated with the liquid inlet pipe end, and liquid outlet pipe is communicated with the liquid supply pipe through one-separator, and liquid supply pipe through the liquid supply pipe. One end of the first liquid outlet pipe 850 and one end of the second liquid outlet pipe 860 are respectively positioned at the upper side and the lower side of the inner limiting ring 820, and the other end of the first liquid outlet pipe 850 and the other end of the second liquid outlet pipe 860 are respectively positioned at the upper side and the lower side of the small piston cylinder 520, and the second liquid outlet pipe 860 is positioned at the lower end of the inner isolation cylinder 430. The reverse liquid supply pipe fitting 810 comprises a reverse liquid supply pipe 811, an open groove 812 is formed in the bottom end of the reverse liquid supply pipe 811, and the interior of the reverse liquid supply pipe 811 is communicated with the bottom end of the piston cabin through the open groove 812.

Referring to fig. 1 to 13, the liquid supply conversion outer core member 710 includes a liquid supply conversion outer core 711, a threaded hole 712 is formed at an upper end of an inside of the liquid supply conversion outer core 711, a sliding insertion groove 713 is formed at a lower end of an inside of the liquid supply conversion outer core 711, a blocking ring 714 is fixedly connected in the sliding insertion groove 713, an upper end and a lower end of the sliding insertion groove 713 are communicated through a first passage 715 formed in the liquid supply conversion outer core 711, a second passage 716 is formed in the liquid supply conversion outer core 711, a reverse liquid supply pipe 810 is communicated with an upper end of the sliding insertion groove 713 through the second passage 716, a reverse liquid discharge hole 717 and a forward liquid discharge hole 718 are formed in the liquid supply conversion outer core 711, the reverse drain hole 717 and the forward drain hole 718 are connected with the sliding insertion groove 713 and the inside of the whipstock body 610 at both ends, the liquid supply conversion core member 720 comprises a liquid supply conversion core 721, an outer sealing cylinder 722 and a top sealing ring 723, the outer sealing cylinder 722 is fixedly sleeved outside the liquid supply conversion core 721, the top sealing ring 723 is fixedly connected to the top of the liquid supply conversion core 721, the liquid supply conversion core 721 is slidably connected in the sliding insertion groove 713 through the top sealing ring 723, the blocking ring 714 can block the lower end of the liquid supply conversion core 721, a liquid supply countersink 724 is provided in the inside of the upper end of the liquid supply conversion core 721, The upper end of the liquid supply conversion inner core 721 is provided with a reverse liquid supply hole 725 and a forward liquid supply hole 726, the inner ends of the reverse liquid supply hole 725 and the forward liquid supply hole 726 are communicated with a liquid supply countersink 724, the inner part of the lower end of the liquid supply conversion inner core 721 is provided with a liquid discharge countersink 727, the lower end of the liquid supply conversion inner core 721 is provided with a transverse through hole 728, the inner end of the transverse through hole 728 is communicated with the liquid discharge countersink 727, a liquid supply lowering tool is tightly pressed on the top sealing ring 723 through a threaded connection with the threaded hole 712, the liquid supply lowering tool can push the liquid supply conversion inner core 721 along with the change of the depth of the liquid supply lowering tool screwed into the threaded hole 712, When the liquid supply conversion inner core 721 is positioned at the lower end of the sliding insertion groove 713, the forward liquid supply hole 726 is communicated with the upper end of the first channel 715, the upper end of the second channel 716 is communicated with the forward liquid discharge hole 718 through the sliding insertion groove 713, the reverse liquid supply hole 725 and the transverse through hole 728 are closed, when the liquid supply conversion inner core 721 is positioned at the upper end of the sliding insertion groove 713, the reverse liquid supply hole 725 is communicated with the upper end of the second channel 716, the transverse through hole 728 is communicated with the reverse liquid discharge hole 717, and the forward liquid supply hole 726 and the upper end of the first channel 715 are closed. the liquid supply lowering tool is screwed into the threaded hole 712, and as the depth of the liquid supply lowering tool screwed into the threaded hole 712 increases, the liquid supply lowering tool pushes the liquid supply conversion core 721 to slide along the sliding insertion groove 713, the core limiting rod 740 limits the rotation of the liquid supply conversion core 721, when the liquid supply conversion core 721 abuts against the blocking ring 714, the reverse liquid supply hole 725 and the transverse through hole 728 are closed, the liquid supply lowering tool supplies liquid to the liquid supply countersink tank 724, the high-pressure liquid flows to the upper end of the first channel 715 through the forward liquid supply hole 726, and then the high-pressure liquid flows into the lower end of the first channel 715 through the upper end of the first channel 715, the high-pressure liquid flowing out of the lower end of the first channel 715 flows into the concentrated liquid supply hole 130, the high-pressure liquid flows into the forward liquid passage assembly 400 through the concentrated liquid supply hole 130, then flows into the top end of the piston chamber through the forward liquid passage assembly 400, the high-pressure liquid pushes the piston pushing assembly 200 to move downwards, the liquid at the bottom end of the piston chamber flows into the reverse liquid supply pipe 811 through the opening groove 812 at the bottom end of the reverse liquid supply pipe 811, the liquid in the reverse liquid supply pipe 811 pushes the one-way check member 830 to be conducted, the liquid in the reverse liquid supply pipe 811 flows into the second channel 716, the liquid then passes through the sliding insertion groove 713 and the forward liquid discharge hole 718, Finally, the liquid flows into the whipstock body 610 and is discharged to the outside of the whipstock body 610 through the communication groove 620. The liquid supply lowering tool is screwed into the threaded hole 712, the liquid supply lowering tool does not press the top end of the liquid supply conversion inner core 721, the liquid supply conversion inner core 721 abuts against the top end of the sliding insertion groove 713, the forward liquid supply hole 726 and the upper end of the first channel 715 are closed, the liquid supply lowering tool supplies liquid to the liquid supply countersunk head groove 724, high-pressure liquid flows into the second channel 716 through the reverse liquid supply hole 725, thereafter, the high-pressure liquid flows into the reverse liquid supply pipe 811, the high-pressure liquid is blocked by the one-way check member 830, the high-pressure liquid flows into the inner isolation cylinder 430 through the first liquid inlet pipe 840, the high-pressure liquid pushes the small piston cylinder 520 to slide down along the inner isolation cylinder 430, The small piston cylinder 520 drives the sealing gasket 540 on the top sealing plate 530 to leave the concentrated liquid supply hole 130, the concentrated liquid supply hole 130 is opened, after the small piston cylinder 520 passes through the communication port of the first liquid outlet pipe 850, high-pressure liquid flows back to the reverse liquid supply pipe 811 through the first liquid outlet pipe 850, then flows into the bottom end of the piston cabin through the opening groove 812 at the bottom end of the reverse liquid supply pipe 811, the high-pressure liquid pushes the piston pushing assembly 200 to move upwards, because the concentrated liquid supply hole 130 is opened, liquid at the upper end of the piston cabin flows into the concentrated liquid supply hole 130 through the forward liquid passage assembly 400 in sequence, liquid flowing through the concentrated liquid supply hole 130 flows into the liquid discharge countersink 727, and then flows into the whipstock body 610 through the drain countersink 727, the through-hole 728, and the reverse drain hole 717, and is then discharged to the outside of the whipstock body 610 through the communication groove 620.

Referring to fig. 1 to 13, the one-way check member 830 includes a sliding guide block 831, a connecting rod 832, a sealing plate 833 and a fourth compression spring 834, wherein the sealing plate 833 and the sliding guide block 831 are respectively and fixedly connected to the upper and lower ends of the connecting rod 832, the sliding guide block 831 is slidably connected to the inside of the reverse liquid supply pipe 810, an opening is provided around the sliding guide block 831, the upper and lower sides of the sliding guide block 831 are communicated through the opening, the connecting rod 832 passes through the inner limiting ring 820, the fourth compression spring 834 is sleeved on the connecting rod 832, the two ends of the fourth compression spring 834 are respectively pressed on the upper side of the sliding guide block 831 and the lower side of the inner limiting ring 820, and the sealing plate 833 is pressed and sealed on the upper side of the inner limiting ring 820. When the liquid flows into the reverse liquid supply pipe 811 at the lower side of the inner limit ring 820, the liquid pushes the one-way check member 830 to be conducted, the liquid pushes the sealing plate 833 to move upwards, the sliding guide block 831 drives the fourth compression spring 834 to be compressed, the sealing plate 833 leaves the upper side of the inner limit ring 820, the inner limit ring 820 is conducted internally, the liquid flows into the upper side of the inner limit ring 820 from the lower side of the inner limit ring 820, and then is discharged through the reverse liquid supply pipe 810. When the liquid flows into the reverse liquid supply pipe 811 at the upper side of the inner limit ring 820, the liquid pressure acts on the upper side of the sealing plate 833, the sealing plate 833 is blocked by the inner limit ring 820, and the inner limit ring 820 is closed, so that the effect of stopping the flow in the reverse liquid supply pipe 811 is achieved.

In a second aspect, an embodiment of the present application further provides a method for drilling an ultra-short radius U-shaped geothermal well, where the above sidetrack windowing device is used to perform an anchoring operation before sidetrack windowing, including the following steps:

S1: selecting two vertical wells or inclined wells with the bottom of the well being 900-1000 meters away, wherein one well is used as a main well and the other well is used as an auxiliary well;

The ultra-short radius U-shaped geothermal well drilling method can realize the utilization of geothermal resources under the condition that water is not taken during heat taking, and the application range is not limited by regions and groundwater resources. The conventional same-well injection and production heat exchange mode is changed, the heat exchange section distance can reach 1000 meters, and the injected water flowing through can be fully heated. The main well adopts the ultra-short radius horizontal drilling technology, can quickly enter a heat exchange target layer, and has short drilling footage and low investment under the condition of the same heat energy exchange capacity. The method can directly utilize 2 old wells, enter a target horizon through an ultra-short radius horizontal drilling technology, and reduce the investment by more than 1/3 by utilizing the old wells. And by adopting a gyromagnetic guide butt joint communication process, accumulated errors while drilling are eliminated, and the complete connection and communication of 2 horizontal wellbores are ensured. The ultra-short radius side drilling horizontal well technology with the curvature radius of 10-50 m is adopted and matched with a rotary magnetic guiding process, so that the problems of long ineffective drilling footage, short horizontal section in a target layer, high cost, low heat exchange efficiency and accurate butt joint of the horizontal section in the conventional geothermal energy development are solved, and a novel process and new technology with high efficiency, low cost and wide application range are provided for the utilization of the existing abandoned well and the geothermal energy development.

Specifically, the working principle of the sidetracking windowing device and the ultra-short radius U-shaped geothermal well drilling method is as follows: in anchoring operation, the liquid supply lowering tool is screwed into the threaded hole 712, as the depth of the liquid supply lowering tool into the threaded hole 712 increases, the liquid supply lowering tool pushes the liquid supply conversion core 721 to slide along the sliding insertion groove 713, the core limiting rod 740 limits the rotation of the liquid supply conversion core 721, when the liquid supply conversion core 721 abuts against the blocking ring 714, the reverse liquid supply hole 725 and the transverse through hole 728 are closed, the liquid supply lowering tool supplies liquid to the liquid supply countersink tank 724, high-pressure liquid flows to the upper end of the first channel 715 through the forward liquid supply hole 726, then the high-pressure liquid flows into the lower end of the first channel 715 through the upper end of the first channel 715, the high-pressure liquid flowing out of the lower end of the first channel 715 flows into the concentrated liquid supply hole 130, the high-pressure liquid pushes the top 530 through pressure, the movable rod 510 slides along the through hole 450, the small piston cylinder 520 slides along the movable rod 510 in the inner isolation cylinder 430, the second compression spring 550 is compressed, the top sealing plate 530 drives the gasket 540 to leave the concentrated liquid supply hole 130, the concentrated liquid supply hole 130 is conducted, the high-pressure liquid flows into the upper transition chamber through the concentrated liquid supply hole 130, the high-pressure liquid in the upper transition chamber flows into the outer transition chamber through the second communication hole 440, the high-pressure liquid in the outer transition chamber flows into the piston chamber on the upper side of the piston plate 230 through the through hole 450, the high-pressure liquid pushes the piston plate 230 to move downwards, the first compression spring 240 is increased by the compression elastic force, the liquid in the piston chamber on the lower side of the piston plate 230 flows into the reverse liquid supply pipe 811 through the opening groove 812 at the bottom end of the reverse liquid supply pipe 811, the liquid in the reverse liquid supply pipe 811 pushes the one-way check member 830 to be conducted, the liquid in the reverse liquid supply pipe 811 flows into the second passage 716, the liquid then passes through the sliding insertion groove 713 and the forward liquid discharge hole 718, finally, the liquid flows into the whipstock body 610, and is discharged to the outside of the whipstock body 610 through the communication groove 620, the liquid in the piston chamber at the lower side of the piston plate 230 is smoothly discharged to perform pressure release so as to smoothly complete the anchoring operation. When the high-pressure liquid pushes the piston plate 230 to move downwards, the piston plate 230 drives the sliding rod 220 to slide along the sealing sleeve 160, the sliding rod 220 drives the connecting frame 210, the connecting frame 210 drives the external movable barrel 250 to move downwards, the upper end of the upper connecting rod 320 rotates around the second hinging seat 252, the lower end of the upper connecting rod 320 swings outwards, the lower end of the lower connecting rod 330 rotates around the first hinging seat 114, the upper end of the lower connecting rod 330 swings outwards, the upper connecting rod 320 and the lower connecting rod 330 push the anchor plate 310 to push out outwards, the anchoring plate 310 is pressed against the well wall to complete anchoring, after the liquid supply is stopped by the liquid supply lowering tool, the sealing gasket 540 on the top sealing plate 530 is pushed by the elastic force of the second compression spring 550 to press and seal the concentrated liquid supply hole 130 again, so that the pressure loss of the high-pressure liquid is reduced, and the anchoring state of the anchoring claw assembly 300 is maintained after the liquid supply lowering tool is lifted.

When the anchoring state is released, the liquid supply lowering tool is screwed into the threaded hole 712, the liquid supply lowering tool does not press the top end of the liquid supply conversion core 721, the liquid supply conversion core 721 abuts against the top end of the sliding insertion groove 713, the forward liquid supply hole 726 and the upper end of the first channel 715 are closed, the liquid supply lowering tool supplies liquid to the liquid supply countersunk groove 724, high-pressure liquid flows into the second channel 716 through the reverse liquid supply hole 725, thereafter, the high-pressure liquid flows into the reverse liquid supply pipe 811, the high-pressure liquid is blocked by the one-way check member 830, the high-pressure liquid flows into the inner isolation cylinder 430 through the first liquid inlet pipe 840, the high-pressure liquid pushes the small piston cylinder 520 to slide downwards along the inner isolation cylinder 430, the small piston cylinder 520 drives the sealing gasket 540 on the top sealing plate 530 to leave the concentrated liquid supply hole 130, the concentrated liquid supply hole 130 is opened, the small piston cylinder 520 passes through the communication port of the first liquid outlet pipe 850, the high pressure liquid flows back to the reverse liquid supply pipe 811 through the first liquid outlet pipe 850, then flows into the bottom end of the piston chamber through the opening groove 812 at the bottom end of the reverse liquid supply pipe 811, the piston plate 230 moves upward under the double pushing action of the first compression spring 240 and the high pressure liquid, the liquid in the piston chamber at the upper side of the piston plate 230 flows to the concentrated liquid supply hole 130 through the through hole 450, the outer transition chamber, the second communication hole 440 and the upper transition chamber in this order, the liquid flowing through the concentrated liquid supply hole 130 flows into the liquid discharge countersink 727, and then flows into the whipstock body 610 through the liquid discharge countersink 727, the transverse through hole 728 and the reverse liquid discharge hole 717, and then is discharged to the outside of the whipstock body 610 through the communication groove 620, so that the liquid in the piston chamber at the upper side of the piston plate 230 is discharged, and the pressure is released, so that the anchor operation is smoothly completed when the anchor operation is released. When the piston plate 230 moves upward, the external movable cylinder 250 moves upward along with the piston plate 230, the upper end of the upper connecting rod 320 rotates around the second hinge seat 252, the lower end of the upper connecting rod 320 swings inward to the second limiting block 253 to block the upper connecting rod 320, at this time, the upper connecting rod 320 keeps an outward swinging angle, the lower end of the lower connecting rod 330 rotates around the first hinge seat 114, the upper end of the lower connecting rod 330 swings inward to the first limiting block 115 to block the lower connecting rod 330, at this time, the outward swinging angle of the lower connecting rod 330 is kept, the occurrence of the inward swinging angle is reduced when the upper connecting rod 320 swings, and the smooth pushing out of the anchor plate 310 is facilitated when anchoring next time. The upper link 320 and the lower link 330 drive the anchor plate 310 to retract inward, the anchor plate 310 leaves the well wall, and the anchoring is released. The anchor claw assembly 300 is smoothly retracted by utilizing the elastic force of the spring and the pressure of the reverse liquid supply, the situation that the anchor claw assembly 300 is not smoothly retracted due to the insufficient elastic force of the spring is reduced, the concentrated liquid supply hole 130 is controlled to be opened by utilizing the mode of the reverse liquid supply, the pressure release during anchoring is convenient, and the anchor claw assembly 300 is convenient to release the anchoring.

The above embodiments of the present application are only examples, and are not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Claims

1. Sidetrack windowing facility, its characterized in that includes:

A mounting cartridge assembly (100);

the piston pushing assembly (200) is connected to the lower end of the inside of the installation cylinder assembly (100) in a sliding manner, and the upper end of the piston pushing assembly (200) extends to the upper end of the inside of the installation cylinder assembly (100);

the anchoring claw assemblies (300) are arranged at the periphery of the mounting cylinder assembly (100) at equal intervals, and the upper ends of the anchoring claw assemblies (300) are connected to the upper ends of the piston pushing assemblies (200);

the forward liquid through assembly (400) is arranged in the upper end of the installation cylinder assembly (100), and the lower end of the forward liquid through assembly (400) is communicated with the inside of the lower end of the installation cylinder assembly (100);

the unidirectional liquid blocking assembly (500), the unidirectional liquid blocking assembly (500) is arranged in the forward liquid passing assembly (400), and the unidirectional liquid blocking assembly (500) seals the top end in the installation cylinder assembly (100);

a whipstock assembly (600), the whipstock assembly (600) being fixedly connected to the top end of the mounting cylinder assembly (100);

The liquid supply conversion assembly (700), the liquid supply conversion assembly (700) is arranged at the bottom end inside the whipstock assembly (600), the liquid supply conversion assembly (700) is communicated with the forward liquid communication assembly (400), and a liquid supply lowering tool can penetrate through the whipstock assembly (600) to be connected into the liquid supply conversion assembly (700) through threads;

reverse liquid leads to subassembly (800), reverse liquid leads to subassembly (800) set up in inside installation section of thick bamboo subassembly (100), reverse liquid leads to subassembly (800) upper end intercommunication supply liquid conversion subassembly (700), reverse liquid leads to subassembly (800) lower extreme intercommunication installation section of thick bamboo subassembly (100) bottom, piston promote subassembly (200) lower extreme sliding cup joint in reverse liquid leads to subassembly (800), the whereabouts instrument of confession liquid is through the screw in the degree of depth control of supply liquid conversion subassembly (700) supply liquid and with forward liquid leads to subassembly (400) with reverse liquid leads to the conversion that subassembly (800) carried out liquid supply and flowing back, reverse liquid leads to subassembly (800) access forward liquid is led to in one-way liquid blocking subassembly (500) in subassembly (400), when the flowing back of subassembly (400), the confession liquid that reverse liquid led to subassembly (800) promotes one-way liquid blocking subassembly (500) top leaves installation section of thick bamboo subassembly (100) inside.

2. The sidetracking window apparatus according to claim 1, wherein the installation cartridge assembly (100) comprises an installation cartridge (110), a partition plate (120) and a sealing sleeve (160), the partition plate (120) divides the inside of the installation cartridge (110) into an installation chamber and a piston chamber from top to bottom, a concentrated liquid supply hole (130) is formed at the top end of the installation cartridge (110), the liquid supply conversion assembly (700) is communicated with the concentrated liquid supply hole (130), sliding grooves (140) are formed at equal intervals on the side wall of the installation chamber, the sealing sleeve (160) is fixedly connected to the periphery of the partition plate (120) at equal intervals, the piston pushing assembly (200) is slidably penetrated through the sealing sleeve (160), the piston pushing assembly (200) is slidably connected to the piston chamber, the upper end of the piston pushing assembly (200) is extended to the outside of the installation cartridge (110) through the sliding grooves (140), the lower end of the anchoring claw assembly (300) is hinged to the bottom end of the installation cartridge (110), the anchoring claw assembly (300) is hinged to the top end of the installation cartridge assembly (200) and is fixedly connected to the top of the partition plate (120), the forward fluid communication assembly (400) communicates with the piston chamber through a first communication port (150).

3. The sidetracking windowing apparatus according to claim 2, wherein the mounting barrel (110) comprises a mounting barrel (111), a closed base (112), a spring stabilizing barrel (113), a first hinge base (114) and a first stopper (115), the closed base (112) is fixedly sleeved at the bottom end of the mounting barrel (111), the spring stabilizing barrel (113) is fixedly connected to the bottom end inside the closed base (112), the spring stabilizing barrel (113) is located in the piston cabin, the bottom end of the piston pushing assembly (200) is inserted into the spring stabilizing barrel (113), the first hinge base (114) is fixedly connected to the outer wall of the lower end of the closed base (112), the lower end of the anchoring claw assembly (300) is hinged to the first hinge base (114), the first stopper (115) is fixedly connected to the outer wall of the upper end of the closed base (112), and the first stopper (115) can block the lower end of the anchoring claw assembly (300).

4. A sidetrack windowing apparatus according to claim 3, wherein the piston pushing assembly (200) comprises a connecting frame (210), a slide bar (220), a piston plate (230), a first compression spring (240) and an external movable barrel (250), wherein the upper end of the slide bar (220) is fixedly connected to the lower side of the connecting frame (210), the lower end of the slide bar (220) is slidably penetrated through the sealing sleeve (160), the upper side of the piston plate (230) is fixedly connected to the lower end of the slide bar (220), the periphery of the piston plate (230) is slidably connected to the piston chamber, the piston plate (230) is slidably sleeved in the reverse hydraulic assembly (800), the lower end of the first compression spring (240) is inserted into the spring stabilizing barrel (113), the upper end of the first compression spring (240) is pressed against the lower side of the piston plate (230), the outer end of the connecting frame (210) is penetrated through the sliding groove (140), the inner wall of the external movable barrel (250) is fixedly connected to the connecting frame (210), and the outer end of the claw assembly (300) is movably sleeved on the outer wall of the hinge assembly (250).

5. The sidetracking windowing apparatus according to claim 4, wherein the outer movable barrel member (250) comprises an outer movable barrel (251), a second hinge base (252) and a second stopper (253), wherein an inner wall of the outer movable barrel (251) is fixedly connected to an outer end of the connecting frame (210), the second hinge base (252) is fixedly connected to an outer wall of the outer movable barrel (251), an upper end of the anchor claw assembly (300) is hinged to the second hinge base (252), the second stopper (253) is fixedly connected to an outer wall of the outer movable barrel (251), and the second stopper (253) can block an upper end of the anchor claw assembly (300).

6. The sidetrack windowing apparatus according to claim 5, wherein the anchor claw assembly (300) comprises an anchor plate (310), an upper link (320) and a lower link (330), the upper link (320) and the lower link (330) are respectively hinged to upper and lower ends of the anchor plate (310), the upper link (320) is hinged to the first hinge base (114), the first stopper (115) is capable of blocking the upper link (320), the lower link (330) is hinged to the second hinge base (252), and the second stopper (253) is capable of blocking the lower link (330).

7. The sidetrack windowing apparatus according to claim 2, wherein the forward liquid communication assembly (400) comprises an outer isolation cylinder (410), an isolation plate (420) and an inner isolation cylinder (430), the upper end of the outer isolation cylinder (410) is fixedly connected to the top of the installation cabin, the lower end of the outer isolation cylinder (410) is fixedly connected to the upper side of the partition plate (120), the interior of the outer isolation cylinder (410) is communicated with the piston cabin through the first communication hole (150), the isolation plate (420) divides the interior of the outer isolation cylinder (410) into an upper transition cabin and a lower transition cabin from top to bottom, the upper end of the inner isolation cylinder (430) is fixedly connected to the lower side of the isolation plate (420), the lower transition cabin is fixedly connected to the upper side of the partition plate (120), the periphery of the isolation plate (420) is provided with a second transition cabin (440), the upper transition cabin is communicated with the piston cabin through the first communication hole (150), the upper end of the inner isolation cylinder (430) is connected to the upper end of the isolation cylinder (420) through the first communication hole (450), the top end of the unidirectional liquid blocking component (500) can seal the concentrated liquid supply hole (130) in the mounting barrel (110).

8. The sidetrack windowing apparatus according to claim 7, wherein the unidirectional fluid blocking assembly (500) comprises a movable rod (510), a small piston cylinder (520), a top sealing plate (530), a sealing gasket (540) and a second compression spring (550), the small piston cylinder (520) and the top sealing plate (530) are fixedly connected to the bottom end and the top end of the movable rod (510), the small piston cylinder (520) is slidably connected to the inner isolation cylinder (430), three communication ports on the reverse fluid blocking assembly (800) are communicated to the inside of the inner isolation cylinder (430), the three communication ports of the reverse fluid blocking assembly (800) and the inner isolation cylinder (430) are respectively located at two sides of the small piston cylinder (520) and the bottom end of the inner isolation cylinder (430), the upper end of the movable rod (510) is slidably penetrated through the through hole (450), the sealing gasket (540) is fixedly connected to the upper side of the top sealing plate (530), the sealing gasket (540) is tightly pressed against the sealing gasket (540) to be tightly pressed against the inner isolation cylinder (430), and the three communication ports of the reverse fluid blocking assembly (800) and the inner isolation cylinder (430) are respectively located at two sides of the small piston cylinder (520) and the bottom end of the inner isolation cylinder (430).

9. The sidetracking windowing apparatus according to claim 2, wherein the whipstock assembly (600) comprises a whipstock body (610), the whipstock body (610) is hollow, a communication groove (620) is formed at a lower end of a side wall of the whipstock body (610), a guide inclined surface (630) is formed at a top end of the whipstock body (610), a penetrating hole (640) is formed in the guide inclined surface (630) of the whipstock body (610), and the liquid supply lowering tool is inserted into the whipstock body (610) through the penetrating hole (640).

10. A method for drilling ultra-short radius U-shaped geothermal wells, using the sidetrack windowing device according to any one of claims 1-9 for anchoring operation before sidetrack windowing, comprising the steps of: