CN210483595U

CN210483595U - Timing automatic clamping device for oil pipe under pump

Info

Publication number: CN210483595U
Application number: CN201921454977.5U
Authority: CN
Inventors: 李亮; 刘凯; 张伟; 何坤元; 刘敏林; 王涛
Original assignee: Shengli Oilfield Kangbei Petroleum Engineering & Equipment Co ltd
Current assignee: Shengli Oilfield Kangbei Petroleum Engineering & Equipment Co ltd
Priority date: 2019-05-24
Filing date: 2019-09-03
Publication date: 2020-05-08
Anticipated expiration: 2029-09-03

Abstract

The utility model relates to an oil pipe is automatic screens ware regularly under pump. The technical scheme is as follows: the slip groove is arranged on the cone, the inclination of the slip groove is the same as that of the upper portion of the slip, the upper portion of the slip is installed in the slip groove on the cone, the slip cannot be separated from the cone within a certain moving range, the lower portion of the slip is hung in the hanging groove in the upper portion of the slip support, the inner pipe penetrates through the slip and the slip support, the upper portion of the slip support is connected with the cone, the slip support is connected to the inner pipe through a self-melting connecting nail, the spring is sleeved on the inner pipe, the upper end face of the spring abuts against the slip support, the spring seat is connected to the inner pipe, and the spring seat compresses the spring and enables the compression force. The beneficial effects are that: the utility model discloses can prevent that the oil pipe post from falling into the shaft bottom after droing with the automatic anchoring of oil pipe on the sleeve pipe, reduce the salvage work load that oil pipe falls into the shaft bottom and causes, have apparent economic benefits.

Description

Timing automatic clamping device for oil pipe under pump

Technical Field

The utility model relates to an anchoring tool in pit that oil field oil recovery well was used, in particular to oil pipe is automatic screens ware regularly under pump.

Background

In the oil extraction process, the accident that the oil pipe falls into the well bottom after breaking and falling off frequently occurs, and because the oil pipe is connected with various underground tools, and the overall dimension of some underground tools is larger, the oil pipe is difficult to fall into the well for salvage, the operation cost is increased, and the oil pipe is also unsuccessful in salvage sometimes, so that the oil well is scrapped, and huge economic loss is caused. In order to prevent the oil pipe from falling into the well bottom after breaking off, some devices have been designed to prevent the oil pipe from falling into the well bottom after breaking off, for example, chinese patent No. 01203266.2, patent name "oil pipe anti-falling device", the product designed according to the technical scheme provided by the patent appears the midway action of going into the well when used on site, so that the oil pipe is anchored in the operation process, the product of the patent cannot be reset after being anchored, only can be lifted upwards, and cannot be lowered downwards, so that the oil pipe is not in place, and only the oil pipe and downhole tools which have been lowered can be completely lifted down. The patent product can not move due to reasons such as rusting for a period of time after being put into a well, so that the working failure of the product is caused, and the effect of preventing an oil pipe from falling into the well cannot be achieved. Such products are currently not used on site. For example, the patent number 200710016468 in China is 200716468. X, the patent name is "tubing anti-drop anchor", when a tubing string breaks off from a well, the tubing string is anchored by the force generated by the throttling pressure difference generated by the rapid falling of the tubing string below the breaking point. When the breaking point is close to the well, the falling speed is not large, the throttling cannot be generated, the above patent can not act, and the function of preventing the oil pipe from falling into the well can not be realized. The two patent technologies can act to prevent the pipe column below the drop point from falling into the well bottom after the oil pipe column drops, and the oil pipe cannot be prevented from dropping. For example, in the chinese patent 200410039801.5 "tubing anchor", the working process of the anchor needs to be performed with hydraulic pressure, and the anchor can only be put on the pump and can only anchor the tubing on the pump, and can not prevent the tubing and tools from dropping into the well.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an above-mentioned defect to prior art exists provides a timing automatic screens ware of oil pipe under pump, can block the automatic card of oil pipe on the sleeve pipe, prevents that the oil pipe post from falling into the shaft bottom after droing, reduces the salvage work volume that oil pipe caused that falls into the shaft bottom.

The technical scheme includes that the self-fluxing slip joint comprises a cone (1), slips (2), a slip support (3), a self-fluxing connecting nail (4), a spring (5), a spring seat (6) and an inner pipe (7), wherein a slip groove is formed in the cone (1), the slope of the slip groove is the same as that of the upper portion of the slips (2), the upper portion of the slips (2) is installed in the slip groove on the cone (1), so that the slips (2) cannot be separated from the cone (1) within a certain moving range, when the slips (2) axially move in the slip groove of the cone (1), the slips (2) can be radially expanded, the lower portion of the slips (2) is hung in the hanging groove in the upper portion of the slip support (3), and when the slip support (3) axially moves, the slips (2) axially move along with the slips and can radially move; the inner pipe (7) penetrates through the slips (2) and the slip holder (3), the upper part of the slip holder (3) is connected with the cone (1), and the slip holder (3) is connected to the inner pipe (7) through the self-melting connecting nail (4), so that the slip holder (3) is restrained and cannot move axially, the slips are ensured to be in a shrinkage state in the process of going into the well, and the well can be smoothly gone into the well; spring (5) suit is on inner tube (7), and the up end of spring (5) withstands slip support (3), and spring holder 6 is connected on inner tube (7), and spring holder (6) compression spring (5) makes the compressive force of spring (5) act on slip support (3).

Preferably, the self-melting connecting nail (4) is made of degradable magnesium alloy materials.

Preferably, the slip groove on the cone (1) is dovetail-shaped, the upper part of the slip (2) is provided with dovetail teeth, and the dovetail teeth are connected in a matching way.

Preferably, the number of the slips (2) is 3-8, and the slips are uniformly distributed between the cone (1) and the slip holder (3).

Preferably, the outer surface of the slip (2) is provided with fixed teeth.

The utility model has the advantages that: the utility model discloses install the lower extreme at the oil pipe column, after going down design position, melt (degradation) after connecting nail contact well liquid from melting for a few days, the slips holds in the palm and loses the restraint, and the slips holds in the palm to go upward and promotes the slips and go upward under the compressive force effect of spring, and the slips outwards opens the anchoring on the sleeve pipe under the cone effect, makes the automatic screens of oil pipe column can not drop on the sleeve pipe, consequently, the utility model discloses can be with the automatic anchoring of oil pipe on the sleeve pipe, prevent that the oil pipe column from falling into the shaft bottom after droing, reduce the fishing work load that oil pipe falls into the shaft bottom and cause, have apparent economic.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

in the upper diagram: the self-fluxing anchor comprises a cone 1, slips 2, a slip holder 3, a self-fluxing connecting nail 4, a spring 5, a spring seat 6 and an inner pipe 7.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Embodiment 1, refer to fig. 1, the utility model provides a pump oil pipe is automatic screens ware regularly, including cone 1, slips 2, slips support 3, from melting connecting nail 4, spring 5, spring holder 6, inner tube 7, be equipped with the slips groove on cone 1, the inclination of slips groove be the same with the inclination of slips 2 upper portion, the upper portion of slips 2 is installed in the slips groove on cone 1, makes slips 2 can not break away from cone 1 in certain range of motion, when slips 2 moves axially in the slips groove of cone 1, slips 2 can radially expand, slips 2's lower part articulates in the hanging groove of slips support 3 upper portion, slips 2 axial displacement and can make radial displacement along with it when making slips support 3 axial displacement; the inner pipe 7 penetrates through the slips 2 and the slip holder 3, the upper part of the slip holder 3 is connected with the cone 1, and the slip holder 3 is connected to the inner pipe 7 through the self-melting connecting nail 4, so that the slip holder 3 is restrained and cannot move axially, the slip is ensured to be in a contraction state in the process of going down a well, and the well can be smoothly put down the well; the spring 5 is sleeved on the inner pipe 7, the upper end face of the spring 5 abuts against the slip support 3, the spring seat 6 is connected to the inner pipe 7, and the spring seat 6 compresses the spring 5 to enable the compression force of the spring 5 to act on the slip support 3.

The self-melting connecting nail 4 is made of degradable magnesium alloy materials, in the prior art, the self-melting connecting nail is made of soluble magnesium alloy, the self-melting connecting nail is automatically melted underground after the working task is completed, the self-melting connecting nail can be completely degraded, and the problems of easy jamming and channel blockage are solved.

The slip groove on the cone 1 is dovetail-shaped, the upper part of the slip 2 is provided with dovetail teeth, and the dovetail teeth are connected in a matching way; the number of the slips 2 is 5, the slips are uniformly distributed between the cone 1 and the slip holder 3, and the manufacturing cost and difficulty of the five slips are moderate; in addition, the outer surface of the slip 2 is provided with fixed teeth which can be inverted teeth and can be better fixed on the inner wall of the casing, so that the whole tubing string acts on the inner wall of the casing, and the tubing string and a downhole tool are prevented from falling into the well bottom.

The utility model provides an oil pipe is automatic screens ware regularly under pump, its application method includes following process:

the self-melting connecting nail 4 is automatically melted and degraded after contacting well liquid for several days after the self-melting connecting nail is arranged at the lower end of the tubing string through the cone 1 and is lowered to the designed position of an oil well, the slip support 3 is not restrained, the slip support 3 moves upwards under the compression force of the spring 5 to push the slip 2 to move upwards, and the slip 2 is outwards expanded and anchored on the casing under the action of the cone 1, so that the tubing string is clamped on the casing.

The utility model discloses can prevent that the oil pipe post from falling into the shaft bottom after droing with the automatic anchoring of oil pipe on the sleeve pipe, reduce the salvage work load that oil pipe falls into the shaft bottom and causes, have apparent economic benefits.

Embodiment 2, the difference between the present invention and embodiment 1 is: the number of the slips 2 is 3, the clamping effect can be basically realized, the cost is relatively low, and the manufacturing difficulty is small.

Embodiment 3, the difference between the present invention and embodiment 1 is: the number of the slips 2 is 8, so that the clamping effect can be better realized, the cost is relatively high, and the manufacture is complex.

The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.

Claims

1. The utility model provides an oil pipe is automatic screens ware regularly under pump, characterized by: the slip-type self-melting anchor comprises a cone (1), slips (2), a slip holder (3), a self-melting connecting nail (4), a spring (5), a spring seat (6) and an inner tube (7), wherein a slip groove is formed in the cone (1), the inclination of the slip groove is the same as that of the upper part of the slips (2), the upper part of the slips (2) is installed in the slip groove on the cone (1), so that the slips (2) cannot be separated from the cone (1) within a certain moving range, when the slips (2) axially move in the slip groove of the cone (1), the slips (2) can be radially expanded, the lower part of the slips (2) is hung in the hanging groove in the upper part of the slip holder (3), and when the slip holder (3) axially moves, the slips (2) axially move along with the slips and can radially move; the inner pipe (7) penetrates through the slips (2) and the slip holder (3), the upper part of the slip holder (3) is connected with the cone (1), and the slip holder (3) is connected to the inner pipe (7) through the self-melting connecting nail (4), so that the slip holder (3) is restrained and cannot move axially, the slips are ensured to be in a shrinkage state in the process of going into the well, and the well can be smoothly gone into the well; spring (5) suit is on inner tube (7), and the up end of spring (5) withstands slip support (3), and spring holder (6) are connected on inner tube (7), and spring holder (6) compression spring (5) makes the compressive force of spring (5) act on slip support (3).

2. The automatic timing retainer for the pump oil pipe according to claim 1, which is characterized in that: the self-melting connecting nail (4) is made of degradable magnesium alloy materials.

3. The automatic timing retainer for the pump oil pipe according to claim 1, which is characterized in that: the slip groove on the cone (1) is dovetail-shaped, the upper part of the slip (2) is provided with dovetail teeth, and the dovetail teeth and the slip are connected in a matching way.

4. The automatic timing retainer for the pump oil pipe according to claim 1, which is characterized in that: the number of the slips (2) is 3-8, and the slips are uniformly distributed between the cone (1) and the slip holder (3).

5. The automatic timing clamping device for the pump oil pipe according to any one of claims 1 to 4, which is characterized in that: the outer surface of the slip (2) is provided with fixed teeth.