Mechanical rotary slip

Abstract

The utility model provides a mechanical rotary slip. Comprising a slip shell, two slip insert seats and a plurality of guide blocks are arranged in the slip shell, the guide blocks and the slip insert seats are arranged in the radial direction of the slip shell, the guide blocks are located on the outer sides of the two slip insert seats, and the guide blocks form a sliding way for the slip insert seats to move in the axial direction; the slip insert seats are arranged in the sliding way at intervals, the axes of the slip insert seats and the center line of the sliding way are located on the same straight line, the slip insert seats are connected with the guide block and the slip seat in a sliding mode, a plurality of slip inserts are arranged at the two opposite ends of the slip insert seats, and pressing mechanisms are arranged at the two opposite ends of the slip insert seats. The slip inserts are detachably connected to the slip insert base, and the multiple slip inserts form an annular cavity. The slip shell is connected with the driving rotating disc and other components, and after connection, torque can be transmitted to the mechanical rotating slip from the driving rotating disc and finally transmitted to the oil pipe pressed by the slip insert, so that rotating operation of the oil pipe is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum, especially a mechanical rotary slip. BACKGROUND

[0002] At present, the pressure operation machine lifting machine without high pressure rotary seat needs to install the traveling slip group on the upper end of the driving turntable, and the existing traveling slip group mainly has the conical slip and the liquid driven rotary slip, when the conical slip is used to carry out the grinding and other rotary operations, the large torque or high speed rotary work often slips with the oil pipe due to the self structure not transmitting the torque, accelerates the abrasion of the slip teeth, and cannot complete the rotary operation of transmitting the torque, the liquid driven rotary slip can realize the function, but the overall volume of the liquid driven rotary slip is large, the height is high, after installation, the use space of the general medium-sized pressure operation machine is almost full, in addition, the height to the pipe is greatly increased, which is very unfavorable to operation, and even personnel high altitude fall occurs, and the liquid driven rotary slip must be installed with the high pressure rotary seat, and the liquid driven rotary slip must be installed with the high pressure rotary seat, and the high pressure rotary seat is expensive, which not only has high cost, but also has certain limitation to the rotating speed. SUMMARY

[0003] Therefore, the mechanical rotary slip capable of transmitting large torque is provided to solve the phenomenon that the existing slip cannot transmit large torque to complete the rotary operation when the pressure operation machine lifting machine carries out the rotary operation, and the specific scheme is as follows:

[0004] A mechanical rotary slip comprises a slip shell, a through hole for pipeline passing through is formed in the slip shell, two slip tooth seats and a plurality of guide blocks are arranged in the slip shell,

[0005] The guide blocks and the slip tooth seats are located on the side of the through hole, the guide blocks are fixedly connected with the slip shell, the guide blocks are located outside the two slip tooth seats, and the guide blocks form a sliding channel for the slip tooth seats to slide;

[0006] The two slip tooth seats are arranged in the sliding channel in a spaced manner, the axis of the slip tooth seat is located on the same line as the center line of the sliding channel, the slip tooth seat is slidably connected with the guide block and the slip seat respectively, a plurality of slip teeth are arranged at the opposite ends of the slip tooth seat, and a pressing mechanism is arranged at the opposite ends of the slip tooth seat.

[0007] The slip teeth are detachably connected to the slip tooth seat, and the plurality of slip teeth are used for clamping the pipeline.

[0008] One end of the pressing mechanism abuts against the slip tooth seat.

[0009] Optionally, the slip shell comprises two coaxially arranged slip seats,

[0010] Two said slips are connected with the traveling top slip or the active rotary table, two said slips are provided with two column plates between them;

[0011] The two column plates are oppositely arranged outside the slip tooth seat, the axis of the two column plates is parallel to the axis of the slip tooth seat, the two sides of the column plate are respectively detachably connected with the two said slips, and the two column plates are both provided with a connecting groove;

[0012] The guide block is fixed in the connecting groove.

[0013] Optionally, the pressing mechanism comprises a pressing rod and a pressing block,

[0014] One side of the pressing block is detachably connected with the end of the slip tooth seat away from the slip tooth, and the other side of the pressing block is rotationally connected with the pressing rod;

[0015] The pressing rod is connected with a fastener.

[0016] Optionally, the pressing rod is further provided with a guide sleeve,

[0017] The guide sleeve is sleeved outside the pressing rod and movably connected with the pressing rod, the two sides and the bottom of the guide sleeve are respectively detachably connected with the two column plates and the slip tooth seat, the end of the guide sleeve away from the slip tooth seat is abutted with the pressing block, and the other end of the guide sleeve is abutted with the fastener.

[0018] Optionally, the guide sleeve is provided with an internal thread,

[0019] The pressing rod is a lead screw, and the pressing rod is rotationally connected with the guide sleeve.

[0020] Optionally, the fastener is a locking nut.

[0021] Optionally, the slip tooth is in the shape of a dovetail groove.

[0022] Compared with the prior art, the application has the beneficial effects that:

[0023] In the application, the slip shell is connected with the traveling top slip, the active rotary table and other components, and after connection, the torque can be transmitted from the active rotary table to the mechanical rotary slip, and finally transmitted to the oil pipe pressed by the slip tooth, so that the rotation operation of the oil pipe is realized, specifically:

[0024] The two vertically arranged slip seats are respectively connected with the traveling top slip, the active rotary table and other components, and the slip tooth seat is pressed by rotating the pressing rod, and the pressing force serves as the normal pressure for transmitting the torque of the slip tooth,

[0025] The slip bowl is arranged in the sliding channel, the slip bowl is fixedly connected with the pressing block, the pressing block is threadedly connected with the pressing rod, the pressing block is driven to slide in the channel formed by the guide block through rotation of the pressing rod, horizontal sliding of the slip bowl in the sliding channel is realized, the slip bowl is compressed and released, and the slip teeth are installed on the slip bowl and finally compress the oil pipe through the slip teeth.

[0026] When the slip teeth compress the oil pipe, the pressing rod can be locked by tightening the fastener to prevent the pressing rod from being released.

[0027] The technical scheme of the utility model will be further described in detail below with reference to the drawings and embodiments. DRAWINGS

[0028] The drawings are used to provide further understanding of the utility model, and constitute a part of the specification, are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation on the utility model. In the drawings:

[0029] Figure 1 It is a mechanical rotary slip structure schematic view in the utility model embodiment;

[0030] Figure 2 It is a mechanical rotary slip main view in the utility model embodiment;

[0031] Figure 3 It is the connection structure schematic view of slip bowl and slip tooth in the utility model embodiment,

[0032] Wherein, 1-slip bowl;2-guide block;3-stand plate;4-guide sleeve;5-locking piece;6-pressing rod;7-pressing block;8-slip bowl;9-slip tooth. DETAILED DESCRIPTION

[0033] The preferred embodiments of the utility model will be described below in combination with the drawings, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0034] According to the drawings Figures 1-2 The mechanical rotary slip includes a slip shell, a through hole for pipeline passing through is formed in the slip shell, two slip bowls 8 and a plurality of guide blocks 2 are arranged in the slip shell,

[0035] The guide block 2 and the slip bowl 8 are located on the side of the through hole, the guide block 2 is fixedly connected with the slip shell, the guide block 2 is located on the outer side of the two slip bowls 8, and the guide block 2 forms a sliding channel for the slip bowl 8 to slide;

[0036] Two said kava tooth seats 8 are arranged in the slide, the axis of the kava tooth seat 8 is arranged on the same line with the center line of the slide, the kava tooth seat 8 is slidably connected with the guide block 2 and the kava seat 1 respectively, and the opposite ends of the kava tooth seat 8 are provided with a plurality of kava teeth 9.

[0037] The kava tooth 9 is detachably connected on the kava tooth seat 8, and the plurality of kava teeth 9 are used for clamping the pipeline.

[0038] One end of the pressing mechanism abuts against the kava tooth seat 8.

[0039] In one embodiment of the utility model, the kava shell includes two coaxially arranged kava seats 1,

[0040] Two said kava seats 1 are connected with the traveling roof kava or the driving rotary disc, and two vertical column plates 3 are arranged between the two kava seats 1,

[0041] The two vertical column plates 3 are oppositely arranged on the outer side of the kava tooth seat 8, the axis of the two vertical column plates 3 is parallel to the axis of the kava tooth seat 8, the two sides of the vertical column plate 3 are detachably connected with the two kava seats 1 respectively, and the two vertical column plates 3 are provided with connecting grooves,

[0042] The guide block 2 is fixed in the connecting groove.

[0043] It should be noted that the kava seat 1 is coaxially arranged up and down, the guide block 2 installed on the two vertical column plates 3 forms a slide along the radial direction of the kava seat 1, and the kava tooth seat 8 is located in the slide and slides left and right in the slide.

[0044] In one embodiment of the utility model, the pressing mechanism includes a pressing rod 6 and a pressing block 7,

[0045] One side of the pressing block 7 is detachably connected with the end of the kava tooth seat 8 away from the kava tooth 9, and the other side of the pressing block 7 is rotatably connected with the pressing rod 6;

[0046] The pressing rod 6 is connected with the fastener 5.

[0047] In one embodiment of the utility model, a guide sleeve 4 is further arranged outside the pressing rod 6,

[0048] The guide sleeve 4 is sleeved outside the pressing rod 6 and movably connected with the pressing rod 6, the two sides and the bottom of the guide sleeve 4 are detachably connected with the two vertical column plates 3 and the kava seat 1 respectively, the end of the guide sleeve 4 away from the kava tooth seat 8 abuts against the pressing block 7, and the other end of the guide sleeve 4 abuts against the fastener 5.

[0049] In one embodiment of the utility model, an internal thread is arranged in the guide sleeve 4,

[0050] The pressing rod 6 is a screw rod, and the pressing rod 6 is rotationally connected with the guide sleeve 4.

[0051] In one embodiment of the utility model, the fastener 5 is a locking nut.

[0052] In the application, the cavity formed by the plurality of slips 9 includes multiple sizes.

[0053] In one embodiment of the utility model, the slip 9 is in the shape of a dovetail groove.

[0054] It should be noted that the detachable connection of the application is realized by bolts / screws, and in the application, the guide block 2 is provided with four blocks, the four guide blocks 2 are divided into two groups, and the two groups of guide blocks are symmetrically installed in the installation slots on the two column plates 3, and the left and right sliding channels are formed between the four guide blocks 2; the guide sleeve 4 is installed between the two column plates 3 and the two slip seats 1 by screws or bolts, the slip seat 1 of the application is a conventional connection plate with a through hole in the center, and the diameter of the through hole is greater than the outer diameter of the oil pipe; in the application, the center of the circular cavity formed by the slip 9 coincides with the center of the through hole on the slip seat 1; the axis of the pressing rod 6, the axis of the guide sleeve 4 and the axis of the slip seat 8 are all located on the same straight line, and all pass through the center of the through hole on the slip seat 1.

[0055] The use process of the utility model is as follows:

[0056] The two slip seats 1 and the two column plates 3 form the shell of the mechanical rotary slip, the opposite sides of the two column plates 3 are respectively connected with the opposite axial end faces of the two slip seats 1 through bolts / screws in a detachable manner; the four guide blocks 2 form horizontal sliding channels, the four guide blocks 2 are perpendicular to the two column plates 3 and are fixed in the installation slots on the column plates 3;

[0057] In use, the two slip seats 1 are sleeved on the oil pipe, the pressing rod 6 is screwed into the threaded hole in the center of the guide sleeve 4, the pressing force is applied to the slip seat 8 by tightening the pressing rod, and the pressing force serves as the normal pressure for the slip 9 to transmit torque; at the same time, the pressing rod 6 and the pressing block 7 are threadedly connected, the pressing block 7 can slide in the sliding channel formed by the guide block 2 by rotating the pressing rod 6, and the slip seat 8 slides left and right, so that the distance between the two slip seats 8 is adjusted while the slip seat 8 is pressed and relaxed; since the slip 9 is installed on the slip seat 8, the oil pipe is finally pressed by the slip 9; after the slip 9 presses the oil pipe, the locking nut is tightened to lock the pressing screw, so that the screw is prevented from being backed off.

[0058] In order to make the rotating slips of the present application more universal, the slip tooth seat 8 in the present application is designed with different specifications of slip tooth seat 8 according to the diameter of the tubing, and is a replaceable structure. Since the slip tooth 9 is easily worn in use and needs to be frequently disassembled and replaced, the slip tooth 9 is designed as a replaceable structure with dovetail groove, and the engagement surface radius of the slip tooth 9 is designed with different sizes according to the diameter of the tubing, so as to be suitable for tubing with different diameters. The combination of slip tooth seat and slip tooth with different specifications can meet the compression of tubing with different specifications from 23 / 8 to 41 / 2.

[0059] The existing traveling slip assembly cannot complete the torque transmission rotating operation, mainly including taper slip and hydraulic rotating slip. When the taper slip performs the rotating operation such as grinding, the hydraulic pipeline of the traveling slip assembly must be disassembled, at this time the traveling slip is completely lost of function, and the well pressure fluctuates, which is easy to cause the accidents of pipe falling or flying. In order to complete the rotating operation, the device capable of transmitting torque needs to be additionally installed on the driving rotary table, which leads to high cost. The hydraulic rotating slip has large overall volume and high height, and after installation, the use space of the general medium-sized pressure operation machine is almost fully occupied. In addition, the height of the tubing is greatly increased, which is very unfavorable for operation, and even the personnel high fall accident occurs. The outer diameter of the mechanical rotating slip is the same as that of the traveling slip, and the height is low, so that after installation, the use space and the height of the tubing are not affected. The mechanical rotating slip is easy to disassemble and assemble, and when the rotating operation is not needed, it can be conveniently disassembled. The overall structure is simple, and the traveling slip is easy to maintain, replace the slip tooth and the slip tooth seat. The mechanical screw jacks are adopted for clamping and locking, which has higher reliability, and the phenomenon of transmission slip caused by the backward movement of the compression block due to internal leakage of the hydraulic rotating slip after long time work does not occur. The large diameter and high strength screw jacks are selected, so that the greater compression force and the greater torque can be more easily transmitted.

[0060] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A mechanical rotary slip comprising a slip housing having a through hole for passage of a pipe therethrough, characterized in that, Two kava tooth seats (8) and several guide blocks (2) are arranged in the kava shell, The guide blocks (2) and the kava tooth seats (8) are located on the side of the through hole, the guide blocks (2) are fixedly connected with the kava shell, the guide blocks (2) are located outside the two kava tooth seats (8), and the guide blocks (2) form a sliding way for the kava tooth seats (8) to slide. The two kava tooth seats (8) are arranged in the sliding way, the axis of the kava tooth seats (8) is in the same straight line with the center line of the sliding way, the kava tooth seats (8) are slidably connected with the guide blocks (2) and the kava seats (1) respectively, and the opposite ends of the kava tooth seats (8) are provided with several kava teeth (9), and the opposite ends of the two kava tooth seats (8) are provided with the pressing mechanisms. The kava teeth (9) are detachably connected with the kava tooth seats (8), and the kava teeth (9) are used for clamping the pipeline. One end of the pressing mechanism abuts against the kava tooth seat (8).

2. A mechanical rotary slip as claimed in claim 1, wherein, The kava shell comprises two coaxially arranged kava seats (1), The two kava seats (1) are connected with the traveling house top kava or the driven rotary disc, and two column plates (3) are arranged between the two kava seats (1). The two column plates (3) are oppositely arranged outside the kava tooth seats (8), the axis of the two column plates (3) is parallel to the axis of the kava tooth seats (8), the two sides of the column plate (3) are detachably connected with the two kava seats (1) respectively, and the two column plates (3) are provided with connecting grooves. The guide blocks (2) are fixed in the connecting grooves.

3. A mechanical rotary slip as claimed in claim 2, wherein, The pressing mechanism comprises a pressing rod (6) and a pressing block (7), One side of the pressing block (7) is detachably connected with one end of the kava tooth seat (8) away from the kava teeth (9), and the other side of the pressing block (7) is rotatably connected with the pressing rod (6). The pressing rod (6) is provided with a fastener (5).

4. A mechanical rotary slip as claimed in claim 3, wherein, The pressing rod (6) is further provided with a guide sleeve (4), The guide sleeve (4) is sleeved outside the pressing rod (6) and movably connected with the pressing rod (6), the two sides and the bottom of the guide sleeve (4) are detachably connected with the two column plates (3) and the kava seats (1) respectively, one end of the guide sleeve (4) away from the kava tooth seat (8) abuts against the pressing block (7), and the other end of the guide sleeve (4) abuts against the fastener (5).

5. A mechanical rotary slip as claimed in claim 4, wherein, The guide sleeve (4) is provided with an internal thread, The pressing rod (6) is a lead screw, and the pressing rod (6) is rotatably connected with the guide sleeve (4).

6. A mechanical rotary slip as claimed in claim 4, wherein, The fastener (5) is a locking nut.

7. A mechanical rotary slip according to claim 1 wherein, The kava teeth (9) are in the shape of dovetail grooves.

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