CN212716486U

CN212716486U - Sleeve clamping device

Info

Publication number: CN212716486U
Application number: CN202021264084.7U
Authority: CN
Inventors: 李超; 黎爱军; 余长柏; 许剑; 李文权; 高海平; 董火平; 王凌寒
Original assignee: Sinopec Oilfield Equipment Corp; Research Institute of Sinopec Oilfield Equipment Co Ltd
Current assignee: Sinopec Oilfield Equipment Corp; Research Institute of Sinopec Oilfield Equipment Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-03-16
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a sleeve pipe clamping device, include: the slip cylinder, the slip seat, the slip, the mandrel, the connecting rod, the sleeve and the stop block; the sleeve is connected with and sleeved on the upper part of the slip cylinder in a sliding manner; a mandrel is arranged in the slip cylinder along the axial direction; a plurality of stop blocks are arranged on the inner wall of the slip cylinder at intervals along the circumferential direction, and slip seats are arranged in a plurality of limiting spaces formed between the stop blocks; a plurality of sections of matched inclined planes are arranged in the slip seat and the inner wall of the slip cylinder in opposite directions; slips are arranged on one side, facing the mandrel, of the slip seat; the upper end of the connecting rod is hinged with the outer side wall of the sleeve, and the lower end of the connecting rod penetrates through a slotted hole in the middle of the slip cylinder body and is hinged with the upper end of the slip seat. The utility model discloses to the accuracy nature of sleeve pipe control among the effective improvement running casing operation, especially carry out the centre gripping sleeve pipe, control sleeve pipe is last to be detained, accuracy during operations such as rotatory whole casing string, but wide application cooperation top drive drilling equipment carries out running casing operation technical field in the oil well cementation.

Description

Sleeve clamping device

Technical Field

The utility model relates to an oil well cementation technical field. More specifically, the utility model relates to a cooperation top drive drilling equipment carries out casing pipe clamping device of running casing operation.

Background

At present, in the conventional casing running operation, a single casing is suspended on a slip seat below a faucet hanging ring through a simple elevator and a steel wire rope, and the casing is turned by a casing tongs to complete the upper buckling. The following room for improvement is evident: 1. the sleeve screwing operation is complex, and the screwing torque cannot be accurately controlled; 2. the efficiency of casing running operation is not high; 3. great potential safety hazard exists; 4. the casing string suspended within the wellbore cannot rotate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a but centre gripping sleeve pipe, but the accurate control sleeve pipe is gone up and is detained, the sleeve pipe clamping device of rotatable whole sleeve pipe cluster.

In order to achieve the above object, the utility model provides a sleeve pipe clamping device, include: the slip cylinder, the slip seat, the slip, the mandrel, the connecting rod, the sleeve and the stop block;

the sleeve is sleeved on the upper part of the slip cylinder and is in sliding connection with the slip cylinder;

a mandrel is axially arranged in the slip cylinder, and the upper end of the mandrel is fixedly embedded in the upper end of the slip cylinder;

a plurality of stop blocks are arranged on the inner wall of the slip cylinder at intervals along the circumferential direction, and slip seats are arranged in a plurality of limiting spaces formed between the stop blocks;

a plurality of sections of matched inclined planes are oppositely arranged on the slip seat and the inner wall of the slip cylinder, wherein the slope angle opening of each section of inclined plane of the slip seat faces upwards, and the slope angle opening of each section of inclined plane of the slip cylinder faces downwards;

one side of the slip seat, which faces the mandrel, is provided with a slip, and one side of the slip, which faces the mandrel, is provided with a plurality of teeth;

the upper end of the connecting rod is hinged with the outer side wall of the sleeve, and the lower end of the connecting rod penetrates through a slotted hole in the middle of the slip cylinder body and is hinged with the upper end of the slip seat.

Preferably, the upper end and the lower end of the slip tooth side are provided with chamfer grooves.

Preferably, the slips and the slip seat are in snap-fit connection.

Preferably, a retainer ring is arranged between the upper end surface of the mandrel and the upper end surface of the inner cavity of the slip cylinder.

Preferably, the radius of the connecting rod upper end connecting point is larger than the radius of the connecting rod lower end connecting point.

Preferably, the mandrel is of hollow tubular construction.

The utility model discloses at least, include following beneficial effect:

1. the sleeve drives the slip seat to move downwards to be tightened through the connecting rod, so that teeth on the inner circle of the slip clamp the outer wall of the sleeve, the upper buckling torque can be accurately transmitted to the sleeve, the upper buckling of a single sleeve or the rotation of the whole sleeve string is realized, and the reliable connection of the sleeve string is completed;

2. the pneumatic slips at the upper part, the buckling sheath, the casing tongs and the like are not needed any more, so that the operation time and cost are greatly shortened, particularly, the torque is accurately controlled, the reliable and safe connection of the casing is ensured, the automation degree of casing running operation is improved, and the production efficiency and the safety are improved;

3. the slips and the slip seat are connected in a clamping and buckling mode in a detachable mode, and the slips of different specifications are replaced to adapt to sleeves of different specifications, so that the application range of the device is effectively widened, and the practicability is enhanced.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a front sectional view of a casing clamping device according to the present invention;

FIG. 2 is a top sectional view of a cannula clamping device of the present invention;

description of the drawings reference numbers:

1. slip cylinder, 2, slip seat, 3, slips, 4, mandrel, 5, connecting rod, 6, sleeve, 7, retaining ring, 8, dog.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1 and 2, the utility model provides a sleeve clamping device, include: the slip comprises a slip cylinder 1, a slip seat 2, slips, a mandrel 4, a connecting rod 5, a sleeve 6 and a stop block 8; the sleeve 6 is sleeved on the upper part of the slip cylinder 1 and is connected with the slip cylinder 1 in a sliding manner; a mandrel 4 is axially arranged in the slip cylinder 1, and the upper end of the mandrel is fixedly embedded in the upper end of the slip cylinder 1; a plurality of stop blocks 8 are arranged on the inner wall of the slip cylinder 1 at intervals along the circumferential direction, and slip seats 2 are arranged in a plurality of limiting spaces formed between the stop blocks 8; a plurality of sections of matched inclined planes are oppositely arranged on the slip seat 2 and the inner wall of the slip cylinder 1, wherein the slope angle opening of each section of the inclined plane of the slip seat 2 is upward, and the slope angle opening of each section of the inclined plane of the slip cylinder 1 is downward; a slip 3 is arranged on one side, facing the mandrel 4, of the slip seat 2, and a plurality of teeth are arranged on one side, facing the mandrel 4, of the slip 3; the upper end of the connecting rod 5 is hinged with the outer side wall of the sleeve 6, and the lower end of the connecting rod penetrates through a slotted hole in the middle of the cylinder body of the slip cylinder 1 and is hinged with the upper end of the slip seat 2.

In the technical scheme, the mandrel 4 is penetrated into the sleeve, so that the sleeve is positioned in a limiting space between the mandrel 4 and the slips 3, and the slips 3 are conveniently clamped; the sleeve 6 slides downwards, the slip seat 2 is pushed by the connecting rod 5 to incline to the mandrel 4 to slide downwards, so that the slips 3 are tightened towards the mandrel 4, the outer wall of the sleeve is clamped by the teeth, and the sleeve is clamped; the sleeve 6 slides upwards, the slip seat 2 is driven by the connecting rod 5 to incline to the slip cylinder 1 to slide upwards, so that the slips 3 are opened, the teeth loosen the outer wall of the sleeve, and the sleeve is loosened; the sleeve 6 slides up and down and is braked by the oil cylinder, so that the sleeve 6 is prevented from moving and sliding to influence the sleeve clamping operation during the clamping operation.

In another technical scheme, chamfer grooves are arranged at the upper end and the lower end of the tooth side of the slips 3.

In the technical scheme, the chamfer groove is of a funnel shape, and plays a role in guiding when the sleeve enters the sleeve, so that the precision requirement for aligning the slip cylinder and the sleeve can be reduced, and the operation efficiency is further improved.

In another technical scheme, the slips 3 and the slip seat 2 are connected in a snap-in manner.

In the technical scheme, the clamping buckle type connection is convenient for the slip seat 2 to replace slips 3 of different specifications so as to adapt to sleeves of different specifications, the application range of the device is effectively enlarged, and the practicability is improved.

In another technical scheme, a retainer ring 7 is arranged between the upper end face of the mandrel 4 and the upper end face of the inner cavity of the slip cylinder 1.

In the technical scheme, the check ring 7 can prevent the top of the sleeve from touching the upper end face of the inner cavity of the slip cylinder, protect the internal structure of the device and avoid the influence of structural deformation on the normal operation of the device.

In another technical scheme, the radius of the upper end connecting point of the connecting rod 5 is larger than that of the lower end connecting point.

In the technical scheme, the larger the radius of the connecting point is, the larger the rotating torque of the connecting point is, and the smaller the stress of the connecting point is, so that the connecting rod 5 can rotate around the connecting point at the upper end when the sleeve 6 slides up and down conveniently.

In another embodiment, the mandrel 4 is a hollow tubular structure.

In the above technical solution, the hollow tubular structure of the mandrel 4 is a light weight design, and the weight of the device is reduced under the condition of satisfying the structural strength of the mandrel 4.

In this embodiment, the method of using the casing gripping device is as follows:

step one, a sleeve clamping device descends from the upper part of a sleeve, a mandrel 4 penetrates into the sleeve, the sleeve is positioned between the mandrel 4 and a slip 3, and the sleeve clamping device stops descending when a sleeve coupling is contacted with a check ring 7;

secondly, the sleeve 6 descends, the slip seat 2 is pushed by the connecting rod 5 to incline the mandrel 4 to slide downwards, so that the slips 3 are tightened towards the mandrel 4 and the outer wall of the sleeve is clamped through the teeth;

thirdly, utilizing the buckling function of the top driving drilling device, rotating the sleeve clamping device and accurately controlling the buckling torque of the sleeve;

and fourthly, the sleeve 6 slides upwards, the slip seat 2 is driven to incline to the slip cylinder 1 to slide upwards through the connecting rod 5, so that the slip 3 is opened, the tooth teeth loosen the outer wall of the sleeve, and the sleeve clamping device moves upwards.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. A casing gripping device, comprising: the slip cylinder, the slip seat, the slip, the mandrel, the connecting rod, the sleeve and the stop block;

2. The casing gripping device of claim 1, wherein the upper and lower ends of the teeth are each provided with a chamfer bevel.

3. A casing gripping apparatus according to claim 1, wherein the slips are snap-fit in connection with the slip bowl.

4. The casing gripping apparatus of claim 1, wherein a retaining ring is disposed between the mandrel upper end surface and the slip bowl inner cavity upper end surface.

5. The ferrule holding device of claim 1, wherein the link upper end connection point radius is greater than the lower end connection point radius.

6. The casing gripping apparatus of claim 1, wherein the mandrel is a hollow tubular structure.