Split type power slip structure

Abstract

The utility model relates to the technical field, in particular to a split type power slip structure which comprises slip bodies, the slip bodies are of a four-piece type split structure, two driving hydraulic cylinders are oppositely arranged between the two slip bodies, and the slip bodies and the driving hydraulic cylinders form a circumferential structure with an opening through a connecting assembly. The inner side of the slip body is slidably connected with a slip block through a T-shaped guide rail, slip inserts are arranged on the inner side of the slip block, the top of the slip block is slidably connected with an upper cover through a slip block connecting rod, and the bottom of the upper cover is fixedly connected with the output end of a driving hydraulic cylinder. According to the utility model, the radial stress structure is optimized, the torsion resistance of the slip structure is improved, the space is saved, and the disassembly is convenient.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling equipment technology, and in particular to a split-type power slip structure. Background Technology

[0002] Powered slips are essential tools used in drilling and workover operations to clamp and rotate drill pipe, casing, and other tubing. Compared to traditional manual slips, powered slips are powered by hydraulic or pneumatic systems, achieving higher efficiency and better operational performance.

[0003] Generally, power rotary table slips are either a single-piece or two-part structure, with the slip blocks located inside the main body. During use, the main body bears most of the radial load, requiring high strength from both the main body and the hinge pin; improper use can easily lead to damage. Furthermore, because single-piece or two-part power rotary table slips lack circumferential connection and restraint between the slip blocks and the main body, relying solely on a conical sliding fit, they are unable to withstand high torques when untangling drill pipes or casings.

[0004] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a split-type power slip structure to solve the problem that the existing power slip body can not withstand large radial loads and large torques.

[0006] Based on the above objectives, this utility model provides a split-type power slip structure, including a slip body, which is a four-piece split structure, including a main body 1, a main body 2, a main body 3, and a main body 4. A driving hydraulic cylinder is provided between the main body 1 and the main body 2, and between the main body 3 and the main body 4. A connecting component is provided between the main body 2 and the main body 3, and between the driving hydraulic cylinder and the slip body. The main body 1 and the main body 4 are not connected on their sides to form an opening. The slip body, the driving hydraulic cylinder, and the connecting component are connected to form a circumferential structure with an opening. The inner side of the slip body is an inclined surface. A slip block is slidably connected to the inner side of the slip body. The slip block is a four-piece split structure. A top cover is provided on the top of the slip block. A slip block connecting rod is hinged between the top cover and the slip block. The bottom edge of the top cover is fixedly connected to the output end of the driving hydraulic cylinder. A slip tooth is provided adjacent to the inner side of the slip block.

[0007] The upper cladding block has a T-shaped guide rail on its inner inclined surface, and a T-shaped groove adapted to the T-shaped guide rail is formed on the cladding block.

[0008] Furthermore, the upper part of the card body protrudes outward relative to the lower part to form a lug.

[0009] Furthermore, the connecting assembly includes a set of hinge components disposed between the main body two and the main body three. The hinge components include an upper connecting plate A and a lower connecting plate A. The upper connecting plate A includes two hinged pieces: a left upper connecting plate and a right lower connecting plate. The lower connecting plate A includes two hinged pieces: a left lower connecting plate and a right lower connecting plate. A hinge pin is disposed between the upper connecting plate A and the lower connecting plate A. The hinge pin vertically passes through the hinge point of the upper connecting plate A and the hinge point of the lower connecting plate B. An upper connecting plate B and a lower connecting plate B are disposed between the driving cylinder and the slip body. The driving cylinder passes through and is fixedly connected to the upper connecting plate B and the lower connecting plate B. The upper connecting plate A, the lower connecting plate A, the upper connecting plate B, and the lower connecting plate B are all bolted to the side of the slip body 1.

[0010] Furthermore, a pin is provided at the hinge point between the slip block connecting rod and the upper cover, and between the slip block connecting rod and the slip block.

[0011] Furthermore, the upper cover has a two-piece structure, including upper cover piece one and upper cover piece two. One end of upper cover piece one and upper cover piece two are connected above the hinge assembly, and the other end of upper cover piece one and upper cover piece two are connected above the opening. An upper cover connecting pin is provided at the connection above the hinge assembly. Two retaining rings are sleeved on both ends of the upper cover connecting pin. An upper cover movable pin is provided at the connection above the opening. The upper cover movable pin is a hexagonal head screw.

[0012] Furthermore, a protrusion is provided on one side of the contact surface between the tooth and the tooth block, and a groove adapted to the protrusion is provided on one side of the contact surface between the tooth and the tooth block. A tooth pressure plate is provided on the top of the tooth block, and the bottom edge of the tooth pressure plate extends out of the top edge of the tooth block and contacts the top surface of the tooth. The tooth pressure plate is bolted to the top surface of the tooth block.

[0013] Furthermore, the split-type power clamp structure is installed as a whole inside the turntable, and the turntable has a mounting groove that matches the lug, and the lug is installed in the mounting groove.

[0014] The beneficial effects of this utility model are:

[0015] This utility model optimizes the overall radial force structure by using a split-body circumferential structure design with an open part and a hinge pin joint design between the split bodies. This design allows the rotation of the hinged part to offset part of the radial load and transfer the remaining radial load to the turntable.

[0016] This invention improves the sliding structure of the conical surface between the slip block and the slip body by replacing it with a T-shaped guide rail and a T-shaped groove sliding structure, thereby enhancing the overall ability to withstand large torques.

[0017] The design of this utility model, which features a split-type slip body, detachable connecting components, split-type slip blocks, and a segmented top cover, facilitates disassembly and assembly, providing convenience for troubleshooting and replacement of local faults.

[0018] This utility model adopts a built-in hydraulic system integrated inside the power slip to control the opening and closing of the slip teeth. The structure is compact and saves space, simplifies installation, reduces failure points, and avoids the safety hazards caused by the hydraulic cylinder pipeline being exposed on the complex drilling platform. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the split-type power latch structure with the opening facing outwards, according to an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the open state of the split-type power latch structure according to an embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram showing the installation of the main body, the slip block, and the slip teeth of the split-type power slip structure according to an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the split-type power clamp structure installed inside the turntable according to an embodiment of the present invention;

[0023] The markings in the diagram are: 1. Main body of the clapper; 101. Main body one; 102. Main body two; 103. Main body three; 104. Main body four; 105. T-shaped guide rail; 106. Lug; 2. Slip block; 201. T-shaped groove; 202. Groove; 3. Slip tooth; 301. Protrusion; 4. Slip block connecting rod; 5. Pin; 6. Top cover; 601. Top cover piece one; 602. Top cover piece two; 7. Top cover connecting pin; 8. Top cover movable pin; 9. Drive cylinder; 10. Main body upper connecting plate A; 1001. Left main body upper connecting plate; 1002. Right main body upper connecting plate; 11. Hinge pin; 12. Main body lower connecting plate A; 1201. Left main body lower connecting plate; 1202. Right main body lower connecting plate; 13. Slip tooth pressure plate; 14. Main body upper connecting plate B; 15. Main body lower connecting plate B; 16. Turntable. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0025] This embodiment proposes a split-type power chuck structure, such as... Figure 1 and Figure 2As shown, the device includes a slip body 1, which is a four-piece split structure, comprising a first body 101, a second body 102, a third body 103, and a fourth body 104. Two drive cylinders 9 are arranged opposite to each other between the two slip bodies 1. The slip bodies 1 and the drive cylinders 9 are connected by a connecting assembly to form an open circumferential structure. A slip block 2 is slidably connected to the inside of the slip body 1. The slip block 2 is also a four-piece split structure. Slip teeth 3 are provided on the inside of the slip block 2. The top of the slip block 2 is slidably connected to the slip block connecting rod 4 via a pin 5. The top of the slip block connecting rod 4 is slidably connected to the upper cover 6 via a pin 5. The bottom of the upper cover 6 is fixedly connected to the output end of the drive cylinder 9.

[0026] Through the above technical solution, this device has a four-piece split structure and is used to clamp drill pipe or casing during drilling operations. The drive cylinder 9 is built into the slip structure. The drive cylinder 9 directly drives the upper cover 6 to move up and down, and then drives the slip block 2 to slide along the T-shaped guide rail 105 through the slip block connecting rod 4. Finally, it drives the slip teeth 3 to slide along the inclined surface of the slip body 1 to achieve clamping and releasing of drill pipe or casing.

[0027] like Figure 2 As shown, the sides of main body 101 and main body 4 104 are not connected to form an opening. The connecting components between main body 2 102 and main body 3 103 include an upper connecting plate A10 and a lower connecting plate A12. The upper connecting plate A10 is formed by hinged left upper connecting plate 1001 and right upper connecting plate 1002. The lower connecting plate A12 is formed by hinged left lower connecting plate 1201 and right lower connecting plate 1202. Both are hinged together to hinge pin 11. The upper connecting plate B14 and the lower connecting plate B15 are provided between the driving cylinder 9 and the slip body 1. The driving cylinder 9 passes through and is fixedly connected to the upper connecting plate B14 and the lower connecting plate B15. The upper connecting plate A10, the lower connecting plate A12, the upper connecting plate B14, and the lower connecting plate B15 are all bolted to the side of the slip body 1.

[0028] Through the above technical solutions, the bolted connection components and the slip body 1 make the connection between the split bodies and between the split bodies and the drive cylinder 9 detachable. The hinge pin 11 and the open circumferential structure design between the split bodies allow partial rotation of the hinge to offset part of the radial load and transfer the remaining radial load to the external mounting body, thus optimizing the overall radial force structure.

[0029] like Figure 3As shown, a T-shaped guide rail 105 is provided on the inclined surface of the inner side of the slip body 1. The T-shaped guide rail 105 is adapted to the T-shaped groove 201 opened on the slip block 2. The slip tooth 3 is connected to the slip block 2 by a movable protrusion 301 and groove 202. The bottom of the protrusion 301 is raised to prevent the slip tooth 3 from falling off. The slip tooth pressure plate 13 provided on the top of the slip block 2 is used to prevent and restrict the slip tooth from moving upward.

[0030] Through the above technical solutions, the design of the T-shaped guide rail 105 and the T-shaped groove 201 provides circumferential constraints between the slip body 1 and the slip block 2, thereby improving their torsional bearing capacity as they rotate with the turntable.

[0031] The upper cover 6 is a two-piece structure, including upper cover piece 1 601 and upper cover piece 2 602. The upper cover piece 1 601 and upper cover piece 2 602 are connected at one end above the hinge pin 11 by the upper cover connecting pin 7, and the connection point above the opening of the circumferential structure is connected by the upper cover movable pin 8. The upper cover connecting pin 7 is fitted with retaining rings at both ends to restrict axial movement, so that the two upper covers 6 can rotate around the upper cover connecting pin 7. The upper cover movable pin 8 is a hexagonal head screw, which is used to control the movement and locking of the two upper covers 6.

[0032] like Figure 4 As shown, the aforementioned split-type power clamp structure is installed in the turntable 16, and the lug 106 is adapted to the mounting groove to prevent the split-type clamp structure from rotating relative to the turntable.

[0033] The installation process in this embodiment is as follows: The connecting components, drive cylinder 9, and slip body 1 are bolted together to form a circumferential structure; the T-shaped groove 201 on the slip block 2 is aligned with the T-shaped guide rail 105 and slid in to achieve a sliding connection with the slip body 1; the movable protrusion 301 is inserted into the groove 202 to connect the slip tooth 3 to the inner side of the slip block 2, and the top of the slip block 2 is threaded with a slip tooth pressure plate 13 to prevent the slip tooth 3 from moving upward; the output ends of the two drive cylinders are respectively threaded to the upper cover plate 601 and... The upper cover plate 602, the upper cover plate 1 601 and the upper cover plate 2 602 are connected to the upper cover connecting pin 7 at the upper connection point of the hinge pin 11 and a retaining ring is fitted to restrict its axial movement. The other end of the connection point above the opening is threaded to the upper cover movable pin 8. The slip block connecting rod 4 is hinged to the upper cover 6 and the slip block 2 through the pin shaft 5 to complete the installation of the split power slip structure. Then the split power slip structure is placed in the turntable 16 and held by the lug 106 to complete the assembly of the drilling operation turntable slip structure.

Claims

1. A split power slip assembly comprising a slip body (1), characterized in that, The slip body (1) is a four-piece split structure, comprising a main body one (101), a main body two (102), a main body three (103) and a main body four (104), a driving liquid cylinder (9) is arranged between the main body one (101) and the main body two (102) and between the main body three (103) and the main body four (104), a connecting assembly is arranged between the main body two (102) and the main body three (103) and between the driving liquid cylinder (9) and the slip body (1), the main body one (101) and the main body four (104) are not connected on the side to form an opening, the slip body (1), the driving liquid cylinder (9) and the connecting assembly are connected to form an open circular structure, the inner side of the slip body (1) is an inclined surface, a slip block (2) is slidably connected to the inner side of the slip body (1), the slip block (2) is a four-piece split structure, an upper cover (6) is arranged on the top of the slip block (2), a slip block connecting rod (4) is hingedly connected between the upper cover (6) and the slip block (2), the bottom edge of the upper cover (6) is fixedly connected with the output end of the driving liquid cylinder (9), and a slip tooth (3) is arranged adjacent to the inner side of the slip block (2). The inner side inclined surface of the slip body (1) is provided with a T-shaped guide rail (105), and a T-shaped groove (201) matched with the T-shaped guide rail (105) is formed in the slip block (2).

2. The split power slip configuration of claim 1, wherein, The upper body of the slip body (1) protrudes outward to form a lug (106) relative to the lower body.

3. The split power slip configuration of claim 1, wherein, The connecting assembly comprises a group of hinged assemblies arranged between the main body two (102) and the main body three (103), the hinged assembly comprises a main body upper connecting plate A (10) and a main body lower connecting plate A (12), the main body upper connecting plate A (10) comprises two hingedly connected left and right main body upper connecting plates (1001) and (1002), the main body lower connecting plate A (12) comprises two hingedly connected left and right main body lower connecting plates (1201) and (1202), a hinge pin (11) is arranged between the main body upper connecting plate A (10) and the main body lower connecting plate A (12), the hinge pin (11) vertically penetrates the hinge points of the main body upper connecting plate A (10) and the main body lower connecting plate A (12), a main body upper connecting plate B (14) and a main body lower connecting plate B (15) are arranged between the driving liquid cylinder (9) and the slip body (1), the driving liquid cylinder (9) penetrates and is fixedly connected with the main body upper connecting plate B (14) and the main body lower connecting plate B (15), and the main body upper connecting plate A (10), the main body lower connecting plate A (12), the main body upper connecting plate B (14) and the main body lower connecting plate B (15) are bolted to the side of the slip body (1).

4. The split power slip configuration of claim 1, wherein, The hinge points between the slip block connecting rod (4) and the upper cover (6) and between the slip block connecting rod (4) and the slip block (2) are provided with pin shafts (5).

5. The split power slip structure of claim 3, wherein, The upper cover (6) is a two-piece structure, comprising an upper cover piece one (601) and an upper cover piece two (602), the upper cover piece one (601) and the upper cover piece two (602) are connected at one end above the hinge assembly, the upper cover piece one (601) and the upper cover piece two (602) are connected at the other end above the opening, the hinge assembly is connected above the upper cover connecting pin (7), the upper cover connecting pin (7) is sleeved with two retaining rings at both ends, the opening is connected above the upper cover movable pin (8), and the upper cover movable pin (8) is a hexagonal head screw rod.

6. The split power slip configuration of claim 1, wherein, The slip dog tooth (3) is provided with a protrusion (301) on one side of a contact surface of the slip dog block (2), the slip dog block (2) is provided with a groove (202) matched with the protrusion (301) on one side of a contact surface of the slip dog tooth (3), the slip dog block (2) is provided with a slip dog tooth pressing plate (13) at the top, the slip dog tooth pressing plate (13) is extended from the top surface edge of the slip dog block (2) and is in contact with the top surface of the slip dog tooth (3), and the slip dog tooth pressing plate (13) is bolted to the top surface of the slip dog block (2).

7. The split power slip configuration of claim 2, wherein, The split power slip dog structure is integrally installed in the rotary table (16), the rotary table (16) is provided with an installation groove matched with the lug (106), and the lug (106) is installed in the installation groove.

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