Skewing device system

Abstract

The utility model discloses a whipstock system. The whipstock system comprises a feeding and releasing module and a whipstock, the feeding and releasing module comprises an upper connector, a connecting rod and a supporting sleeve which are connected in sequence, and one side of the supporting sleeve of the feeding and releasing module is inserted into the hollow whipstock; the feeding and releasing module is of a hollow tubular structure; the interior of the upper connector is in threaded connection with one end of the connecting rod, and the other end of the connecting rod is inserted into the whipstock after being connected with the supporting sleeve through a shear pin. A positioning groove is formed in the inclined surface of the whipstock; a boss is arranged at the position, corresponding to the positioning groove, of the upper joint; and the positioning groove is embedded with the boss and is used for driving the whipstock to rotate together when the upper joint rotates. According to the utility model, a main borehole production channel can be reserved while the whipstock is arranged, and the whipstock is simple in structure, convenient to operate and high in reliability.

Description

Technical Field

[0001] The utility model relates to the field of oil development operations, and particularly relates to a whipstock system. Background Art

[0002] With the continuous deepening of oil development, for development wells or accident wells, the open-hole sidetracking technology is also a common means to handle accident wells or efficiently develop open-hole wells. At present, there are three common open-hole sidetracking technologies. One is the suspended sidetracking method, one is the cement injection sidetracking method, and the other is the whipstock sidetracking method. For medium-high hard formations, the suspended sidetracking is not applicable; for formations where the compaction strength is higher than the cement consolidation strength, the cement injection sidetracking cannot be used. The whipstock sidetracking technology is applicable to any formation, and the sidetracking trajectory is controllable, and the quality of the main and branch interfaces is high. According to the operating characteristics of oil and gas fields and the existing technology, developing an efficient open-hole sidetracking system with a whipstock has become an effective means for oilfields to further tap potential, maintain stable production, and increase production. However, there is currently no efficient and convenient open-hole sidetracking whipstock system that can achieve open-hole sidetracking using a whipstock. Summary of the Utility Model

[0003] In order to solve the problems in the background art, the utility model provides a whipstock system with stable construction and high drilling quality.

[0004] For this reason, the utility model adopts the following technical solutions:

[0005] A whipstock system includes a running and releasing module and a whipstock;

[0006] The running and releasing module includes a pup joint, a connecting rod, and a support sleeve connected in sequence. One side of the support sleeve of the running and releasing module is inserted into the hollow whipstock; the running and releasing module is a hollow tubular structure;

[0007] The inside of the pup joint is threadedly connected to one end of the connecting rod. After the other end of the connecting rod is connected to the support sleeve through a shear pin, it is inserted into the whipstock;

[0008] A positioning groove is provided on the inclined surface of the whipstock, and a convex platform is provided at the position corresponding to the positioning groove on the pup joint; the positioning groove and the convex platform are fitted to drive the whipstock to rotate together when the pup joint rotates.

[0009] Preferably, the inclined surface angle range of the whipstock is 1° to 3°; a threaded surface is further provided at one end of the whipstock away from the pup joint for connecting to other positioning devices during operation.

[0010] Preferably, a first pin hole penetrating through its side wall to the inside is provided on the side wall of the upper sub, and a first pin groove is further provided on one side of the connecting rod close to the upper sub; the positions of the first pin hole and the first pin groove are adapted to each other, and a fixing pin passes through the first pin hole and is inserted into the first pin groove, and the fixing pin is used to reinforce the threaded connection between the upper sub and the connecting rod.

[0011] Preferably, an elastic claw is provided at one end of the connecting rod away from the upper sub, and a through second pin hole is provided on the claw arm of the elastic claw; a second pin groove is provided at one end of the support sleeve close to the connecting rod; the position of the second pin groove is adapted to that of the second pin hole; the shear pin passes through the second pin hole and is inserted into the second pin groove.

[0012] Preferably, a ball seat is provided inside one end of the support sleeve close to the connecting rod; the ball seat is used to push the support sleeve to cut the shear pin under the pressure applied thereto during operation.

[0013] Preferably, a through circulation hole is further provided in the middle of the support sleeve; an annulus is provided at the position of the whipstock corresponding to the support sleeve, and the annulus and the circulation hole form a circulation channel to make the pressure inside the whipstock stable during operation.

[0014] Preferably, sealing rings are provided between the support sleeve and the connecting rod and the whipstock, and a sealing ring is also provided between the connecting rod and the upper sub to keep the pressure from leaking during operation.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model is applicable to various wellbore conditions. The releasing operation is simple and convenient through the shear pin, and the equipment falling into the well is avoided.

[0017] 2. The utility model can retain the production channel of the main wellbore while setting the whipstock.

[0018] 3. The structure of the utility model is simple, the operation is convenient, and the reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall schematic diagram of the utility model;

[0020] Figure 2 is the overall sectional schematic diagram of the utility model;

[0021] Figure 3 is the three-dimensional schematic diagram of the whipstock of the utility model;

[0022] Figure 4Is a three-dimensional schematic diagram of the upper joint of the present utility model;

[0023] Figure 5 Is a three-dimensional schematic diagram of the connecting rod of the present utility model;

[0024] Figure 6 Is an enlarged three-dimensional schematic diagram of the elastic claw part of the connecting rod of the present utility model;

[0025] Figure 7 Is a three-dimensional schematic diagram of the support sleeve of the present utility model;

[0026] Figure 8 Is an overall sectional schematic diagram of the support sleeve of the present utility model;

[0027] Figure 9 Is an enlarged schematic diagram of the head part of the present utility model.

[0028] In the figure: 1. Upper joint, 11. First pin hole, 12. Boss,

[0029] 2. Connecting rod, 21. Elastic claw, 22. Second pin hole, 23. First pin slot,

[0030] 3. Deflector, 31. Positioning slot,

[0031] 4. Shearing pin, 5. Support sleeve, 51. Second pin slot, 52. Ball seat, 53. Circulation hole; Specific embodiments

[0032] The technical solutions of the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] As Figure 1 And Figure 2 Shown, the deflector system of the present utility model includes a hollow deflector 3 and a feeding and releasing module. The feeding and releasing module includes an upper joint 1, a connecting rod 2 and a support sleeve 5; the feeding and releasing module is inserted into the hollow deflector 3;

[0034] As Figure 3 Shown, the two ends of the deflector 3 are respectively a bevel end and a head end. An axial deflector through hole is provided from the bevel end of the deflector, running through to the head end of the deflector; a positioning slot 31 is also provided on one side of the axial through hole away from the head end of the deflector 3. Due to the bevel of the deflector 3, the exposed part of the through hole is elliptical. In this embodiment, the positioning slot 31 is provided at the end of the through hole. Inside the deflector through hole near the head end of the deflector 3, there is a deflector annulus, which is used to keep the pressure stable when the present utility model conveys pressure. The bevel angle range of the deflector 3 is 1° to 3°. The head end of the deflector 3 is also provided with a threaded surface for connecting other positioning devices.

[0035] AsFigure 4 As shown in the figure, the upper joint 1 is provided with an axial through-hole for the upper joint, and the aperture of the through-hole for the upper joint is the same as that of the through-hole for the whipstock; both are used for inserting the connecting rod 2. A first pin hole 11 penetrating into the through-hole for the upper joint is provided on the side wall of the upper joint 1; a boss 12 is provided at one end of the upper joint 1 close to the whipstock, and the boss 12 is adapted to the positioning groove 31. When the present invention works, the boss 12 is embedded in the positioning groove 31 to play the role of bearing torque of the present invention. When the present invention works, it is necessary to adjust the inclined surface orientation of the whipstock 3. At this time, it is necessary to twist the upper joint 1, and the upper joint 1 drives the whipstock 3 to twist through the mutually engaged boss 12 and positioning groove 31. The side wall of the upper joint 1 is adapted to the inclined surface end of the whipstock 3, and a continuous wall surface is formed on the same side wall of the upper joint 1 and the whipstock 3.

[0036] As Figure 5 and Figure 6 shown, both the connecting rod 2 and the support sleeve 5 are hollow rod-shaped structures;

[0037] The tail end of the connecting rod 2 is threadedly connected to the through-hole for the upper joint and fixed by a fixing pin in the first pin hole 11; the fixing pin passes through the first pin hole 11 and is inserted into the first pin slot 23; the head end of the connecting rod 2 extends into the through-hole for the whipstock; an elastic claw 21 is provided at the head end of the connecting rod 2, and a through second pin hole 22 is provided on the claw arm of the elastic claw 21;

[0038] As Figure 7 and Figure 8 shown, the tail end of the support sleeve 5 is sleeved inside the head end of the connecting rod 2, and a second pin slot 51 is provided at the tail end of the support sleeve 5; the claw arms of the elastic claw 21 are distributed around the tail end of the support sleeve 5; the pin 4 is inserted into the second pin hole 22 to the second pin slot 51, so that the support sleeve 5 and the connecting rod 2 are connected by the pin 4. A ball seat 52 is also fixedly clamped inside the tail end of the support sleeve 5, and the ball seat 52 is used to push the support sleeve 5 to cut off the pin 4 when the present invention works; As Figure 9 shown, a through circulation hole 53 is also provided in the middle of the support sleeve 5, and the circulation hole 53 is used to cooperate with the annulus inside the whipstock 3, so that when the present invention works, the channel for the liquid carrying pressure to circulate is enlarged, and the internal pressure is more stable.

[0039] The claw arms of the elastic claw 21 lock the tail end of the support sleeve 5 inside the head end of the whipstock 3, and are used to support the whole of the present invention to bear the axial load.

[0040] Sealing rings are provided between both the support sleeve 5 and the connecting rod 2 and the whipstock 3, and also between the connecting rod 2 and the upper joint 1, which are used to maintain the seal when the whole device is pressurized.

[0041] The working process of the present invention is as follows:

[0042] 1) After assembling the present utility model, the first end of the whipstock is connected to the anchor or the external pipe packer by thread, and can also be connected to positioning tools such as a positioning joint; the pressure input end of the positioning tool should be hermetically connected to the first end of the whipstock 3. One end of the upper joint 1 far away from the whipstock 3 is connected to the drill pipe. The pressure enters the connecting rod through the drill pipe and is then conducted to the support sleeve 5, and finally enters the positioning tool.

[0043] 2) After the present utility model is lowered in place and the anchoring is completed using the positioning tool, a ball is dropped into the hollow pipe of the connecting rod 2, and the pump is started to pump the ball into the ball seat 52. When the pressure rises to the shear pressure value of the shear pin 4, the shear pin 4 breaks, and the ball seat 52 pushes the support sleeve 5 downward, releasing the restraint of the elastic claws 21 of the connecting rod, and finally relieving the pressure inside the present utility model;

[0044] 3) Lift the present utility model, the whipstock 3 and the support sleeve 5 remain in the well, and the upper joint 1 and the connecting pipe 2 are lifted out of the well to complete the releasing operation.

Claims

1. A whipstock system, characterized in that: It includes a feeding and releasing module and a whipstock (3); The feeding and releasing module includes a pup joint (1), a connecting rod (2) and a support sleeve (5) connected in sequence. One side of the support sleeve (5) of the feeding and releasing module is inserted into the hollow whipstock (3); the feeding and releasing module is a hollow tubular structure; The inside of the pup joint (1) is threadedly connected to one end of the connecting rod (2). After the other end of the connecting rod (2) is connected to the support sleeve (5) through a shear pin (4), it is inserted into the whipstock (3); A positioning groove (31) is provided on the inclined surface of the whipstock (3), and a boss (12) is provided at the position of the pup joint (1) corresponding to the positioning groove (31); the positioning groove (31) is fitted with the boss (12) to drive the whipstock (3) to rotate together when the pup joint (1) rotates.

2. The whipstock system according to claim 1, characterized in that: The inclined surface angle of the whipstock (3) ranges from 1° to 3°; a threaded surface is also provided at one end of the whipstock (3) away from the pup joint (1) for connecting to other positioning devices during operation.

3. The whipstock system according to claim 1, wherein: A first pin hole (11) penetrating through to its inside is provided on the side wall of the pup joint (1), and a first pin slot (23) is also provided on one side of the connecting rod (2) close to the pup joint (1); the positions of the first pin hole (11) and the first pin slot (23) are adapted. A fixing pin passes through the first pin hole (11) and is inserted into the first pin slot (23), and the fixing pin is used to reinforce the threaded connection between the pup joint (1) and the connecting rod (2).

4. The whipstock system according to claim 1, characterized in that: An elastic claw (21) is provided at one end of the connecting rod (2) away from the pup joint (1), and a through second pin hole (22) is provided on the claw arm of the elastic claw (21); a second pin slot (51) is provided at one end of the support sleeve (5) close to the connecting rod (2); the position of the second pin slot (51) is adapted to that of the second pin hole (22); the shear pin (4) passes through the second pin hole (22) and is inserted into the second pin slot (51).

5. The whipstock system according to claim 1, characterized in that: A ball seat (52) is provided inside one end of the support sleeve (5) close to the connecting rod (2); the ball seat (52) is used to push the support sleeve (5) to cut the shear pin (4) under the pressure applied during operation.

6. The whipstock system according to claim 1, wherein: A through circulation hole (53) is also provided in the middle of the support sleeve (5); an annulus is provided at the position of the whipstock (3) corresponding to the support sleeve (5), and the annulus and the circulation hole (53) form a circulation channel to stabilize the pressure inside the whipstock (3) during operation.

7. The whipstock system according to claim 1, wherein: Sealing rings are provided between both the support sleeve (5) and the connecting rod (2) and the whipstock (3), and also between the connecting rod (2) and the pup joint (1) to keep the pressure from leaking during operation.

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