CN220621791U

CN220621791U - Novel axial loading type slip

Info

Publication number: CN220621791U
Application number: CN202322388990.8U
Authority: CN
Inventors: 安辉; 马华辉; 蔡立平
Original assignee: Sichuan Kangtes Energy Technology Co ltd
Current assignee: Sichuan Kangtes Energy Technology Co ltd
Priority date: 2023-09-01
Filing date: 2023-09-01
Publication date: 2024-03-19
Anticipated expiration: 2033-09-01

Abstract

The utility model discloses a novel axial loading slip, which relates to the field of petroleum and natural gas underground operation equipment, and comprises the following components: a fixed slip seat, a movable slip seat and a double-conical slip body; the fixed slip seat is fixed, the movable slip seat stretches out and draws back through a hydraulic cylinder piston and can relatively move along the axial direction relative to the fixed slip seat, and conical surfaces matched with the two conical surfaces of the double-conical-surface slip body are respectively arranged in the fixed slip seat and the movable slip seat; the double-conical-surface slip body consists of at least two double-conical-surface sub-slip bodies, and the double-conical-surface slip body is arranged between the fixed slip seat and the movable slip seat; when the pipe column is clamped or loosened, the clamping force for clamping the pipe column is generated by the telescopic hydraulic cylinder, the movable slip seat can also actively provide the clamping releasing force in the reverse motion, the pipe column load is not required to be transferred, the operation procedure is simplified, the operation safety is improved, and meanwhile, the intelligent control condition is created.

Description

Novel axial loading type slip

Technical Field

The utility model relates to the field of underground operation equipment of petroleum and natural gas, in particular to a novel axial loading slip.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

In the operation processes of oil and gas well completion, well repair and the like, the structure of an inner pipe column of a well is basically formed by connecting a single pipe with a certain length, no matter the inner pipe column is put into or taken out, the operation is required at a well head, a special tool such as a slip or an elevator is used for clamping and suspending the pipe column, and the slip is required to be matched with a turntable of an operation machine for use, and is not provided with a slip seat and cannot be singly used; with the technical progress of petroleum equipment, in order to reduce the labor intensity of workers, the well head tools such as manually operated slips in the past are improved into slips in a pneumatic and hydraulic form, and the slips can be used independently without being matched with a turntable.

At present, more companies at home and abroad successively develop various forms of pneumatic and hydraulic slips; the basic structure of the slips is to have a slip body and a slip seat, and the pipe column is clamped by the variable diameter during the relative movement of the slip body and the slip seat inclined plane by utilizing the wedge-shaped tool principle. The pneumatic and hydraulic power is mainly used for throwing the slip body to replace manual throwing of the slips; however, as seen from the action mechanism of the slips, the following problems exist:

firstly, when the slips are tightly held on the pipe column, if the holding force is small, the pipe column is required to slip, the holding force is large enough, slip teeth are required to be embedded into the surface of the pipe column, and when the slip teeth are required to be loosened, if the stressed load of the slip teeth is not transferred, the slips are forcibly pulled out by a hydraulic cylinder, the slip teeth cut the surface layer of the pipe column, and the pipe column is damaged, so that the pipe column can be lifted firstly, the slips are opened after the load is transferred, an operation program is added for an operator, the process is complicated, the operation risk is increased, the operation is particularly raised in the operation under pressure, accidents often occur due to improper operation, and the main problem at present; secondly, the holding force of the slips and the pipe column is generated by depending on the initial friction between slip teeth and the pipe column and the axial stress of the pipe column, the larger the stress is, the larger the locking force is, the holding force cannot be applied actively, and the hydraulic cylinder only plays a role in delivering the slips; thirdly, the slip only has an inclined plane in one direction, the stress can be unidirectional, the reverse holding force (slip releasing direction) can not be generated, and once the reverse pipe column is out of control, accidents occur; fourth, because the slips body only needs to be completely withdrawn from the slip seat to meet the requirement of the maximum drift diameter of the pipe column structure, the slips are often overturned, the direction of holding the pipe column in a tight fit is changed, once the slips are withdrawn accidentally, the holding posture cannot be returned again, the holding state cannot be restarted secondarily, and the accident cannot be remedied.

Disclosure of Invention

The utility model aims at: the novel axial loading type slip is provided for solving the problems in the prior art, the clamping force mode of slip teeth is actively increased, the radial withdrawal force of the slip body is also actively generated during withdrawal, the slip body moves radially and axially together, the clamping state is withdrawn, active release is realized, the structural defect of the existing slip is overcome, the field operation is simpler and more reliable, and accidents are prevented.

The technical scheme of the utility model is as follows:

a novel axial loading slip comprising: a fixed slip seat, a movable slip seat and a double-conical slip body;

the fixed slip seat is fixed, the movable slip seat can relatively move along the axial direction relative to the fixed slip seat, and conical surfaces matched with the two conical surfaces of the double-conical slip body are respectively arranged in the fixed slip seat and the movable slip seat; the double-conical-surface slip body consists of at least two double-conical-surface sub-slip bodies, and the double-conical-surface slip body is arranged between the fixed slip seat and the movable slip seat;

the movable slip seat is closed to fix the slip seat along the axial direction, and the double-conical slip bodies are compressed to enable each double-conical slip body to axially and radially move so as to clamp the pipe column; the movable slip seat is far away from the fixed slip seat along the axial direction, so that each double-conical-surface sub-slip body moves axially and radially, and the pipe column is loosened.

Further, the double-cone slip body comprises: the slip teeth are divided into an upper group and a lower group, are symmetrically arranged on the lining plate, have opposite directions, and respectively form opposite wedge-shaped working faces with corresponding slip seats.

Further, two conical surfaces of the double-conical-surface sub-slip body are provided with limiting clamps, and the conical surfaces of the fixed slip seat and the movable slip seat are provided with limiting grooves matched with the limiting clamps.

Further, the fixed slip seat is connected with the movable slip seat through a telescopic column; the fixed end of the telescopic column is connected with the fixed slip seat, and the telescopic end of the telescopic column is connected with the movable slip seat.

Further, two conical surfaces of the double-conical-surface sub-slip body are provided with mounting grooves;

the limiting clamp is a connecting piece, one end of the connecting piece is fixedly installed in the installation groove, and the other end of the connecting piece is installed in the limiting groove.

Further, a mechanical jar is also mounted on the telescoping post.

Further, the telescopic column is an air cylinder or a hydraulic cylinder.

Further, the double-conical-surface slip body consists of four-petal double-conical-surface sub-slip bodies.

Further, the inner side is provided with a clamping groove for installing the slip teeth, holes for inserting the cylindrical pins are formed in the clamping groove and the slip teeth, and the slip teeth are fixedly installed in the clamping groove through the holes for sequentially inserting the cylindrical pins into the clamping groove and the slip teeth.

Further, the telescopic column is at least 2.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model provides a novel axial loading formula slips, when chucking or loosen the tubular column, the cohesion of chucking tubular column is produced by flexible post, and flexible post reverse motion also can initiatively provide the unclamping power, does not need to shift tubular column load, has simplified operation procedure, has improved the operation safety, has created the condition for intelligent control simultaneously.

2. The utility model provides a novel axial loading formula slips, is double slips seat structure, makes the double conical surface slips body possess two-way locking function, and two slips seats provide the locking force that the tubular column is jacked up or is fallen down, and is safer than current single seat.

3. The utility model provides a novel axial loading formula slips, guarantees that the double conical surface slips body is in two slips seat all the time, and the double conical surface slips body can not lose control because of the upset, and as long as liquid (gas) jar has pressure, the double conical surface slips body remains locking state all the time, has created the condition for secondary locking.

4. The utility model provides a novel axial loading formula slips, its mechanical jar stroke is adjustable, has not only kept the free travel space of double cone face slips body locking tubular column, has kept the locking form of current slips, has also increased the release card power that the double cone face slips body was withdrawn from fixed slip seat.

5. A novel axial loading type slip adopts an asymmetric design of a movable slip seat and a fixed slip seat, reduces the overall height and quality of the slip, and is convenient to install and operate.

Drawings

FIG. 1 is a schematic illustration of a construction of a novel axial loading slip;

FIG. 2a is a cross-sectional view of a new axial loading slip in an undamped condition;

FIG. 2b is a cross-sectional view of a new axial loading slip in a contracted state;

FIG. 3 is a schematic view of a stationary slip bowl;

FIG. 4 is a schematic view of a movable slip bowl;

FIG. 5 is a schematic view of the structure of the double cone slip body in a contracted state;

FIG. 6 is a schematic view of the double cone slip body in an undamped condition;

FIG. 7 is a schematic structural view of a liner plate;

fig. 8 is a schematic structural view of the connector.

Reference numerals: the two-way slip comprises a fixed slip seat, a movable slip seat, a 3-double-conical slip body, a 4-double-conical sub-slip body, a 5-lining plate, a 6-slip tooth, a 7-limit groove, an 8-telescopic column, a 9-mounting groove, a 10-connecting piece, a 11-clamping groove and a 12-cylindrical pin.

Detailed Description

It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The features and capabilities of the present utility model are described in further detail below in connection with examples.

Example 1

Referring to fig. 1-8, a novel axial loading slip, comprising: a fixed slip seat 1, a movable slip seat 2 and a double-conical slip body 3; preferably, the fixed slip bowl 1 and the movable slip bowl 2 are in asymmetric design, that is, the structures of the fixed slip bowl 1 and the movable slip bowl 2 are different in modeling, specifically, as shown in fig. 1, the height of the fixed slip bowl 1 is obviously lower than that of the movable slip bowl 2, so that the overall structure height is reduced, and meanwhile, the overall height and the quality of the double-cone slip body 3 can be correspondingly reduced, so that the installation and the operation are convenient;

the double-conical-surface slip body 3 consists of four-petal double-conical-surface sub-slip bodies 4;

the fixed slip seat 1 is fixed, the movable slip seat 2 can relatively move along the axial direction relative to the fixed slip seat 1, and conical surfaces matched with the two conical surfaces of the double-conical slip body 3 are respectively arranged in the fixed slip seat 1 and the movable slip seat 2; the double-cone-surface slip body 3 consists of at least two double-cone-surface sub-slip bodies 4, and the double-cone-surface slip body 3 is arranged between the fixed slip seat 1 and the movable slip seat 2;

the movable slip seat 2 is close to the fixed slip seat 1 along the axial direction, the double conical surface slip bodies 3 are compressed, so that each double conical surface sub slip body 4 moves axially and radially, and the pipe column is clamped; the movable slip seat 2 is far away from the fixed slip seat 1 along the axial direction, so that each double-conical slip body 4 moves axially and radially, and the pipe column is loosened.

In this embodiment, specifically, the double-cone slip body 4 includes: the lining plate 5 and the slip teeth 6 are divided into an upper group and a lower group, the slip teeth 6 are symmetrically arranged on the lining plate 5, the directions of the two groups of slip teeth 6 are opposite, and opposite wedge-shaped working faces are formed with the corresponding slip seats respectively.

In this embodiment, specifically, both conical surfaces of the double-conical-surface sub-slip body 4 are provided with limiting clips, and the conical surfaces of the fixed slip seat 1 and the movable slip seat 2 are provided with limiting grooves 7 matched with the limiting clips; preferably, the two conical surfaces of the double-conical-surface sub-slip body 4 are provided with mounting grooves 9;

the limiting clamp is a connecting piece 10, one end of the connecting piece 10 is fixedly arranged in the mounting groove 9, and the other end of the connecting piece is arranged in the limiting groove 7; preferably, as shown in fig. 2, the connector 10 is an "i" key.

In this embodiment, specifically, the fixed slip bowl 1 and the movable slip bowl 2 are connected through a telescopic column 8; the fixed end of the telescopic column 8 is connected with the fixed slip seat 1, and the telescopic end of the telescopic column 8 is connected with the movable slip seat 2; preferably, the number of the telescopic columns 8 is at least 2, and in this embodiment, as shown in fig. 1, 2 telescopic columns 8 are respectively installed on two sides.

In this embodiment, a mechanical jar is also mounted on the telescopic column 8; preferably, a mechanical jar is mounted in front of (or behind) the telescopic column 8; the mechanical jar is arranged in front of (or behind) the telescopic column 8 to leave a free stroke so as to prevent the pipe column from being clamped by the axial pulling force of the pipe column when the stroke of the pneumatic cylinder and the hydraulic cylinder is insufficient; preferably, the stroke of the mechanical jar is adjustable, so that a free stroke space for locking the tubular column by the double-cone-surface slip body 3 is reserved, the locking mode of the existing slip is reserved, and the unlocking force for withdrawing the double-cone-surface slip body 3 from the fixed slip seat 1 is also increased; meanwhile, the bidirectional free sliding travel of the double-conical-surface slip body 3 can be designed according to actual conditions, so that the double-conical-surface slip body 3 is always arranged between the fixed slip seat 1 and the movable slip seat 2, the double-conical-surface slip body 3 cannot lose control due to overturning, and as long as a liquid (air) cylinder has pressure, the double-conical-surface slip body 3 always keeps a locking state, conditions are created for secondary locking, and a double-safety design effect is achieved.

In this embodiment, specifically, a clamping groove 11 for installing the slip teeth 6 is provided on the inner side of the lining board 5, and holes for inserting the cylindrical pins 12 are provided on the clamping groove 11 and the slip teeth 6, and the cylindrical pins 12 are sequentially inserted into the clamping groove 11 and the holes on the slip teeth 6, so that the slip teeth 6 are fixedly installed in the clamping groove 11.

When the pipe column is to be clamped, the telescopic column 8 pushes the movable slip seat 2 to move opposite to the fixed slip seat 1, the double-conical slip body 3 moves along the two conical surfaces, meanwhile, the slip teeth 6 and the pipe column are pushed to generate holding force, and the larger the thrust of the telescopic column 8 is, the larger the holding force is.

If the pipe column is to be loosened, the thrust of the telescopic column 8 acts on the movable slip seat 2 at first, the movable slip seat 2 pulls the double-conical-surface slip body 3 to move reversely along the two conical surfaces through the connecting piece 10, meanwhile, the double-conical-surface slip body 3 also moves on the fixed slip seat 1 through the connecting key, the double-conical-surface slip body 3 is pulled to withdraw from the fixed slip seat 1, the holding force of the slip seat on the slip teeth 6 and the pipe column is relieved together, and the releasing purpose is realized.

The foregoing examples merely represent specific embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present application, which fall within the protection scope of the present application.

This background section is provided to generally present the context of the present utility model and the work of the presently named inventors, to the extent it is described in this background section, as well as the description of the present section as not otherwise qualify as prior art at the time of filing, are neither expressly nor impliedly admitted as prior art against the present utility model.

Claims

1. A novel axial loading slip, comprising: a fixed slip seat (1), a movable slip seat (2) and a double-conical slip body (3);

the fixed slip seat (1) is fixed, the movable slip seat (2) can relatively move along the axial direction relative to the fixed slip seat (1), and conical surfaces matched with the two conical surfaces of the double-conical slip body (3) are respectively arranged in the fixed slip seat (1) and the movable slip seat (2); the double-cone-surface slip body (3) consists of at least two double-cone-surface sub-slip bodies (4), and the double-cone-surface slip body (3) is arranged between the fixed slip seat (1) and the movable slip seat (2);

the movable slip seat (2) is close to the fixed slip seat (1) along the axial direction, the double conical surface slip bodies (3) are compressed, so that each double conical surface sub slip body (4) moves axially and radially, and the pipe column is clamped; the movable slip seat (2) is far away from the fixed slip seat (1) along the axial direction, so that each double-conical sub-slip body (4) moves axially and radially, and the pipe column is loosened.

2. The novel axial loading slip of claim 1, wherein the double-cone slip body (4) comprises: the slip teeth (6) are divided into an upper group and a lower group, the slip teeth (6) are symmetrically arranged on the liner plate (5), the directions of the two groups of slip teeth (6) are opposite, and opposite wedge-shaped working faces are formed with the corresponding slip seats respectively.

3. The novel axial loading type slip according to claim 1, wherein two conical surfaces of the double-conical-surface sub-slip body (4) are provided with limiting clamps, and the conical surfaces of the fixed slip seat (1) and the movable slip seat (2) are provided with limiting grooves (7) matched with the limiting clamps.

4. A new axial loading slip according to claim 1, characterized in that the stationary slip bowl (1) and the movable slip bowl (2) are connected by means of a telescopic column (8); the fixed end of the telescopic column (8) is connected with the fixed slip seat (1), and the telescopic end of the telescopic column (8) is connected with the movable slip seat (2).

5. A new axial loading slip according to claim 3, characterized in that the two conical surfaces of the double conical surface sub-slip body (4) are provided with mounting grooves (9);

the limiting clamp is a connecting piece (10), one end of the connecting piece (10) is fixedly arranged in the mounting groove (9), and the other end of the connecting piece is arranged in the limiting groove (7).

6. A new axial loading slip according to claim 4, characterised in that the telescopic column (8) is also fitted with a mechanical jar.

7. A new axial loading slip according to claim 4, characterized in that the telescopic column (8) is a cylinder or a hydraulic cylinder.

8. The novel axial loading type slip as claimed in claim 1, wherein the double-cone slip body (3) is composed of four-petal double-cone sub-slip bodies (4).

9. The novel axial loading type slip according to claim 2, wherein the inner side of the lining plate (5) is provided with a clamping groove (11) for installing the slip teeth (6), holes for inserting the cylindrical pins (12) are formed in the clamping groove (11) and the slip teeth (6), and the slip teeth (6) are fixedly installed in the clamping groove (11) through the holes in the clamping groove (11) and the slip teeth (6) which are sequentially inserted by the cylindrical pins (12).

10. A new axial loading slip according to claim 4, characterized in that the telescopic columns (8) are at least 2.