Anchoring tool for whipstock

Abstract

The invention belongs to the technical field of whipstock anchoring, and relates to a whipstock anchoring tool. The device comprises an outer pipe, an inner pipe, a main slip and an auxiliary slip. The inner pipe is slidably sleeved with a first piston plate, a first through hole communicated with the portion, below the first piston plate, of the outer pipe is formed in the inner pipe, the first piston plate is fixedly connected with a communicating pipe, the main slip is horizontally and slidably connected with the communicating pipe, the auxiliary slip is rotatably connected with the main slip, and barbs are arranged on the auxiliary slip. A leaking hole is formed in the position, corresponding to the main slip, of the outer pipe; a pushing block is movably arranged in the outer pipe, a first inclined face matched with the main slip is arranged on the pushing block, under the action of the pushing block, the main slip moves outwards, the pushing block pushes the auxiliary slip to rotate, and then the barbs penetrate into the inner wall of the pipeline. The outer pipe can be fixed by injecting drilling fluid into the inner pipe, fixing of the outer pipe can be relieved by pumping out the drilling fluid in the inner pipe, operation is easy and convenient, and the working efficiency can be improved easily.

Description

Technical Field

[0001] The invention belongs to the technical field of deflector anchoring and relates to a deflector anchoring tool. Background Art

[0002] Anchoring of the deflector is a technology used in the field of oil and gas to fix the deflector during window sidetracking of oil and gas well casing. Its core purpose is to ensure that the deflector is firmly fixed during window sidetracking operations to prevent the deflector from sliding or rotating during the window opening process, thereby improving the safety and success rate of construction.

[0003] During the window opening operation, the bevel guide is subjected to the cutting torque, which causes the bevel guide to rotate, making it easy for the bevel guide to move relative to the pipe, resulting in window opening failure.

[0004] In order to solve the above problems, the present invention proposes a deflector anchoring tool. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the present invention proposes a deflector anchoring tool.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a kind of inclined guide anchoring tool, comprising an outer tube, an inner tube, a main cava and an auxiliary cava; the outer tube is provided with a connecting part connected to the inclined guide, the inner tube is coaxially fixed in the outer tube, a first piston plate is slidably sleeved on the inner tube, a first through hole connected to the outer tube below the first piston plate is provided on the inner tube, a connecting pipe is fixedly connected to the first piston plate, the main cava is horizontally slidably connected to the connecting pipe, the auxiliary cava is rotatably connected to the main cava, a barb is provided on the auxiliary cava, and a leakage hole is provided on the outer tube at a position corresponding to the main cava; a push block is movably provided in the outer tube, and a first inclined surface cooperating with the main cava is provided on the push block. Under the action of the push block, the main cava moves outward, and the push block pushes the auxiliary cava to rotate, thereby causing the barb to penetrate into the inner wall of the pipeline.

[0007] Furthermore, a connecting cavity connected to the first piston cavity is provided on the connecting tube, a limiting cylinder is fixed in the outer tube, and the upper end of the connecting tube is in sealing and sliding contact with the inner wall of the limiting cylinder; a second through hole matching the connecting cavity is provided in the upper part of the limiting cylinder; a second piston plate is elastically and sealingly slidably arranged in the outer tube, the second piston plate is in sealing and sliding contact with the outer wall of the limiting cylinder, and the second piston plate is fixedly connected to the push block.

[0008] Furthermore, a sealing plate is elastically and slidably provided in the inner tube, and the sealing plate has the function of sealing the first through hole.

[0009] Furthermore, a plurality of stripes are provided on a side of the main slip away from the axis of the outer tube.

[0010] Furthermore, the length direction of the stripes is parallel to the axis of the outer tube.

[0011] Furthermore, a top block for limiting the position of the first piston plate is arranged on the bottom wall of the outer tube.

[0012] Furthermore, an adapting groove is provided on the main cava, a rotating hole is provided on the side wall of the adapting groove, the auxiliary cava is movably arranged in the adapting groove, the auxiliary cava is fixedly connected with a seesaw, the seesaw is rotatably arranged in the rotating hole and the end of the seesaw facing away from the auxiliary cava extends to the outside of the main cava.

[0013] Furthermore, a second inclined surface is provided on one side of the main slip close to the axis of the outer tube, and the second inclined surface cooperates with the first inclined surface.

[0014] Furthermore, a slide rail is fixed on the connecting pipe, a slider is horizontally elastically slidably connected in the slide rail, and the main slip is fixedly connected to the slider.

[0015] Furthermore, a fixing plate is fixedly connected to the upper portion of the outer tube, the limiting cylinder is fixedly connected to the fixing plate, the second piston plate is arranged below the fixing plate, and a third spring is fixedly connected between the fixing plate and the second piston plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: by injecting drilling fluid into the inner tube, the sealing plate moves downward, and the drilling fluid enters the first piston chamber, so that the main slip and the auxiliary slip move upward and outward at the same time and press against the inner wall of the pipeline, so that the outer tube is fixed in the pipeline. Afterwards, the drilling fluid enters the second piston chamber, the second piston plate moves downward, and the push block acts on the seesaw to make the auxiliary slip rotate around the rotating shaft, and then the barb pierces the inner wall of the pipeline, thereby improving the stability of the outer tube and preventing the deflector from moving in the pipeline. Then, the first through hole is blocked by the sealing plate, so that the first piston chamber and the second piston chamber maintain appropriate pressure, so that the auxiliary slip and the barb keep squeezing the pipeline, making the outer tube more stable, and then making the deflector more stable.

[0017] After the side window is opened, the drilling fluid in the inner tube is pumped out to make the drilling fluid in the first piston chamber and the second piston chamber flow out, the push block moves up, the main slip moves into the outer tube, the barb is pulled out from the inner wall of the pipe, and then the deflector and the outer tube can be taken out of the pipe.

[0018] The outer tube can be fixed by injecting drilling fluid into the inner tube, and the outer tube can be released by pumping out the drilling fluid in the inner tube. The operation is simple and convenient, which is conducive to improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 The present invention Figure 2 A magnified view of part A; Figure 4 The present invention Figure 2 A magnified view of part B; Figure 5 is a cross-sectional view of the outer tube in the present invention; Figure 6 It is a schematic diagram of the external structure of the connecting pipe in the present invention; Figure 7 The present invention Figure 6 Enlarged view of part C; Figure 8 It is a schematic diagram of the structure of the auxiliary slip in the present invention; Fig. 9 It is a structural schematic diagram of the push block in the present invention.

[0020] In the figure: 1, outer tube; 2, inner tube; 3, connecting part; 4, first spring; 5, sealing plate; 6, first through hole; 7, first piston chamber; 8, top block; 9, first piston plate; 10, connecting pipe; 11, connecting chamber; 12, fixing plate; 13, limiting cylinder; 14, second through hole; 15, second piston plate; 16, pushing block; 1601, first inclined surface; 17, slide rail; 18, second spring; 19, sliding block; 20, main cava; 21, stripes; 22, adapter groove; 23, auxiliary cava; 24, barb; 25, seesaw; 26, rotating shaft; 27, second piston chamber; 28, third spring; 29, leakage hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1-Figure 9 As shown, the technical solution adopted by the present invention is as follows: a deflector anchoring tool includes an outer tube 1, an inner tube 2, a main slip 20 and an auxiliary slip 23.

[0023] The inner tube 2 is coaxially fixedly arranged in the outer tube 1. A connecting portion 3 is fixedly installed on the upper end of the outer tube 1, and the connecting portion 3 is connected to the inner tube 2. When in use, the deflector is fixedly connected to the outer tube 1 through the connecting portion 3, and the liquid supply pipe is connected to the inner tube 2 through the connecting portion 3.

[0024] A sealing plate 5 is sealingly and slidingly provided inside the inner tube 2 , and a first spring 4 is fixedly connected between the sealing plate 5 and the lower end wall of the inner tube 2 .

[0025] The lower sliding sleeve of the inner tube 2 is provided with a first piston plate 9, and the first piston plate 9 is in sealing and sliding cooperation with the inner wall of the outer tube 1. The first piston plate 9, the inner tube 2 and the outer tube 1 enclose a first piston chamber 7. The lower part of the inner tube 2 is provided with a first through hole 6, and the first through hole 6 is connected to the first piston chamber 7. A top block 8 is fixed on the bottom wall of the outer tube 1, and the top block 8 has a limiting function for the first piston plate 9. When the first piston plate 9 contacts the top block 8, the first piston plate 9 will not block the first through hole 6, so that the first through hole 6 is always connected to the first piston chamber 7. The sealing plate 5 has a blocking function for the first through hole 6.

[0026] A connecting tube 10 is fixedly connected to the upper end of the first piston plate 9 , and the connecting tube 10 is slidably mounted on the inner tube 2 , and a connecting cavity 11 is opened on the side wall of the connecting tube 10 , and the connecting cavity 11 passes through the first piston plate 9 downward, so that the connecting cavity 11 is connected to the first piston cavity 7 .

[0027] A fixing plate 12 is fixed to the upper part of the inner tube 2. The fixing plate 12 is fixedly connected to a limiting cylinder 13, and the limiting cylinder 13 is coaxial with the outer tube 1. The upper end of the connecting tube 10 is inserted into the limiting cylinder 13 and is sealed and slidably matched with the limiting cylinder 13. A second through hole 14 is provided on the side wall of the limiting cylinder 13, and a third through hole connected to the connecting cavity 11 is provided on the side of the upper end of the connecting tube 10 away from the inner tube 2, and the third through hole cooperates with the second through hole 14.

[0028] The second piston plate 15 is provided in a sealing and sliding manner in the outer tube 1, and the second piston plate 15 is in sealing and sliding contact with the stopper cylinder 13. The second piston plate 15 is located below the fixed plate 12, and a third spring 28 is fixedly connected between the second piston plate 15 and the fixed plate 12. The fixed plate 12, the stopper cylinder 13, the second piston plate 15 and the inner wall of the outer tube 1 enclose a second piston cavity 27, and the second piston cavity 27 is communicated with the second through hole 14.

[0029] A plurality of push blocks 16 are fixedly connected to the lower end of the second piston plate 15, and the plurality of push blocks 16 are evenly distributed around the axis of the second piston plate 15. A first inclined surface 1601 is formed on one side of the push block 16 away from the axis of the second piston plate 15.

[0030] The connecting pipe 10 is fixedly connected with a plurality of slide rails 17, each of which is horizontally slidably connected with a slider 19, and a second spring 18 is fixedly connected between the slider 19 and the slide rail 17. Each slider 19 is fixedly connected with a main cava 20. A plurality of stripes 21 are arranged on the side of the main cava 20 away from the axis of the outer tube 1. The length direction of the stripes 21 is parallel to the axis of the outer tube 1. A second inclined surface is arranged on the side of the main cava 20 close to the axis of the outer tube 1, and the second inclined surface cooperates with the first inclined surface 1601 on the push block 16. The plurality of main cava 20 corresponds to the plurality of push blocks 16 one by one, and the push block 16 pushes the corresponding main cava 20 to move outward through the first inclined surface 1601 and the second inclined surface.

[0031] The outer tube 1 is provided with a plurality of leakage holes 29 , which correspond one to one with the plurality of main slips 20 , and the main slips 20 extend to the outside of the outer tube 1 through the corresponding leakage holes 29 .

[0032] An adapting groove 22 is provided at the lower end of the main slip 20, and a secondary slip 23 is movably provided in the adapting groove 22. A plurality of barbs 24 are provided on the outer side of the secondary slip 23. A rotating hole is provided on the bottom wall of the adapting groove 22, and a seesaw 25 is fixedly connected to the secondary slip 23. The end of the seesaw 25 away from the secondary slip 23 passes through the rotating hole and extends to the outside of the main slip 20. The seesaw 25 and the main slip 20 are rotatably connected by a rotating shaft 26, and the rotating shaft 26 is provided in the rotating hole.

[0033] Working principle: Initially, the third through hole is below the second through hole 14 and is sealed by the inner wall of the limiting cylinder 13, the first piston plate 9 abuts against the top block 8, and the sealing plate 5 blocks the first through hole 6. The first inclined surface 1601 contacts the second inclined surface.

[0034] When in use, the deflector is fixedly connected to the outer tube 1 through the connecting portion 3, and the liquid supply pipe is connected to the inner tube 2. Then the deflector and the outer tube 1 are placed in the pipeline.

[0035] Drilling fluid is injected into the inner tube 2 through the liquid supply pipe, so that the sealing plate 5 moves downward, the first through hole 6 is gradually opened, and the drilling fluid in the inner tube 2 enters the first piston chamber 7 through the first through hole 6, so that the first piston plate 9 gradually moves upward, and the connecting tube 10 moves upward. The connecting tube 10 drives the slide rail 17 to move upward, and the main slip 20 moves upward. Under the action of the first inclined surface 1601 and the second inclined surface, the main slip 20 moves outward, and the auxiliary slip 23 moves outward. The main slip 20 and the auxiliary slip 23 gradually approach the inner wall of the pipeline and abut against the inner wall of the pipeline, so that the outer tube 1 is fixed to the inner wall of the pipeline.

[0036] As the connecting pipe 10 moves upward, the connecting pipe 10 gradually approaches the fixed plate 12, and when the connecting pipe 10 contacts the fixed plate 12, the third through hole is connected to the second through hole 14. The connecting pipe 10 stops moving upward, and the drilling fluid in the first piston chamber 7 enters the second piston chamber 27 through the connecting chamber 11, and the second piston plate 15 moves downward to overcome the elastic force of the third spring 28. The second piston plate 15 drives the push block 16 to move downward, and the push block 16 pushes the main slip 20 to move further outward, so that the main slip 20 further squeezes the pipeline, thereby improving the stability of the outer tube 1.

[0037] Afterwards, as the push block 16 moves downward, the lower end of the push block 16 squeezes the seesaw 25, causing the seesaw 25 and the auxiliary slip 23 to rotate around the rotating shaft 26, and the barbs 24 on the auxiliary slip 23 are inserted into the inner wall of the pipe, thereby making the outer pipe 1 and the deflector more firmly fixed.

[0038] After that, the hydraulic pressure in the inner tube 2 is reduced, and the sealing plate 5 moves upward under the action of the first spring 4, and the sealing plate 5 just blocks the first through hole 6, so that the first piston chamber 7 and the second piston chamber 27 are kept at a suitable pressure. The main slip 20 and the auxiliary slip 23 are closely fitted to the pipeline so that the deflector is stably fixed in the pipeline.

[0039] After the side window is opened, the drilling fluid in the inner tube 2 is gradually extracted, and the sealing plate 5 moves up, so that the drilling fluid in the inner tube 2 below the first through hole 6 and the sealing plate 5, and the first piston chamber 7 enters the inner tube 2 below the sealing plate 5. Since the barb 24 is inserted into the inner wall of the pipeline, the connecting pipe 10 cannot move down. Under the action of the third spring 28, the second piston plate 15 moves up, and the drilling fluid in the second piston chamber 27 enters the first piston chamber 7. The push block 16 moves up, thereby releasing the limit of the push block 16 on the rocker 25. As the push block 16 moves up, under the action of the second spring 18, the main slip 20 moves into the outer tube 1, and at the same time, under the action of the gravity of the first piston plate 9, the main slip 20 moves down, and the barb 24 is gradually pulled out from the inner wall of the pipeline. Afterwards, the auxiliary slip 23 rotates around the rotating shaft 26 under its own gravity and resets.

[0040] Then the deflector and the outer pipe 1 can be taken out from the pipeline.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A deflector anchoring tool, characterized in that: The invention comprises an outer tube (1), an inner tube (2), a main slip (20) and an auxiliary slip (23); the outer tube (1) is provided with a connection portion (3) connected to a deflector, the inner tube (2) is coaxially fixed in the outer tube (1), a first piston plate (9) is slidably sleeved on the inner tube (2), a first through hole (6) connected to the outer tube (1) below the first piston plate (9) is opened on the inner tube (2), the first piston plate (9) is fixedly connected to a connecting pipe (10), the main slip (20) is horizontally slidably connected to the connecting pipe (10), The auxiliary slip (23) and the main slip (20) are rotatably connected, the auxiliary slip (23) is provided with a barb (24), and a leak hole (29) is provided on the outer tube (1) at a position corresponding to the main slip (20); a push block (16) is movably provided inside the outer tube (1), and a first inclined surface (1601) is provided on the push block (16) for matching with the main slip (20). Under the action of the push block (16), the main slip (20) moves outward, and the push block (16) pushes the auxiliary slip (23) to rotate, thereby causing the barb (24) to penetrate into the inner wall of the pipe.

2. A deflector anchoring tool according to claim 1, characterized in that: The connecting tube (10) is provided with a connecting cavity (11) connected with the first piston cavity (7); a limiting cylinder (13) is fixed in the outer tube (1); the upper end of the connecting tube (10) is in sealing and sliding contact with the inner wall of the limiting cylinder (13); the upper part of the limiting cylinder (13) is provided with a second through hole (14) matching with the connecting cavity (11); a second piston plate (15) is elastically and sealingly slidably arranged in the outer tube (1), the second piston plate (15) is in sealing and sliding contact with the outer wall of the limiting cylinder (13), and the second piston plate (15) is fixedly connected to the push block (16).

3. A deflector anchoring tool according to claim 1, characterized in that: A sealing plate (5) is elastically slidably disposed inside the inner tube (2), and the sealing plate (5) has the function of sealing the first through hole (6).

4. A deflector anchoring tool according to claim 1, characterized in that: A plurality of stripes (21) are provided on the side of the main slip (20) facing away from the axis of the outer tube (1).

5. A deflector anchoring tool according to claim 4, characterized in that: The length direction of the stripes (21) is parallel to the axis of the outer tube (1).

6. A deflector anchoring tool according to claim 1, characterized in that: A top block (8) for limiting the position of the first piston plate (9) is provided on the bottom wall of the outer tube (1).

7. A deflector anchoring tool according to claim 1, characterized in that: The main cava (20) is provided with an adapting groove (22), a rotating hole is provided on a side wall of the adapting groove (22), the auxiliary cava (23) is movably arranged in the adapting groove (22), the auxiliary cava (23) is fixedly connected with a seesaw (25), the seesaw (25) is rotatably arranged in the rotating hole, and an end of the seesaw (25) away from the auxiliary cava (23) extends to the outside of the main cava (20).

8. A deflector anchoring tool according to claim 1 or 2, characterized in that: A second inclined surface is provided on one side of the main slip (20) close to the axis of the outer tube (1), and the second inclined surface cooperates with the first inclined surface (1601).

9. A deflector anchoring tool according to claim 1, characterized in that: A slide rail (17) is fixed on the connecting pipe (10), a slider (19) is horizontally elastically slidably connected inside the slide rail (17), and the main slipper (20) is fixedly connected to the slider (19).

10. A deflector anchoring tool according to claim 2, characterized in that: A fixing plate (12) is fixedly connected to the upper portion of the outer tube (1), the limiting cylinder (13) is fixedly connected to the fixing plate (12), the second piston plate (15) is arranged below the fixing plate (12), and a third spring (28) is fixedly connected between the fixing plate (12) and the second piston plate (15).

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