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Sucker rod back-off anti-reversion device

A sucker rod and anti-reversal technology, which is applied in the direction of drill pipe, drill pipe, casing, etc., can solve problems such as easy reversal and potential safety hazards, and achieve the effects of high connection strength, improved service life and stable work

Active Publication Date: 2021-02-05
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an anti-reversal device for sucker rod undercutting, which solves the problems of easy reversal and potential safety hazards in the prior art when the sucker rod is undercut

Method used

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  • Sucker rod back-off anti-reversion device
  • Sucker rod back-off anti-reversion device
  • Sucker rod back-off anti-reversion device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as Figures 1 to 4As shown, the sucker rod reverse buckle anti-reversal device includes a brake base 11 , a rotation-stop ferrule 1 , a hollow shaft section 3 and a sucker rod clamp 2 . The brake base 11 includes a brake sleeve 111 and a threaded puppet 112 integrally arranged for fixing to the wellhead, and a sucker rod perforation is provided in the center of it for the sucker rod to pass through; the stopper sleeve 1, the hollow shaft Segment 3 constitutes the sucker rod holder, which is rotated and assembled on the upper end of the brake base 11 through a one-way rotation structure. The center hole of the anti-rotation ferrule 1 and the center hole of the hollow shaft section 3 form the center hole of the holder, and the center hole of the holder For the sucker rod to pass through; the sucker rod clamp 2 includes two blocks 21, which are used to hug and fix on the sucker rod.

[0047] Wherein, the lower end of the threaded nipple 112 is provided with an extern...

Embodiment 2

[0054] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the lower end of the brake base 11 is provided with a threaded nipple 112 for connecting to the threaded thread at the upper end of the sucker rod BOP; In an example, a flange may also be provided on the brake base 11 to be connected to an adapted wellhead device.

Embodiment 3

[0056] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the sucker rod clamp 2 includes two symmetrically arranged cuboid clamping blocks, while in this embodiment, one end of the two clamping blocks is hinged, and the other end is provided If there are bolts, the locking structure between the two clamping blocks is only formed by one set of bolts.

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Abstract

The invention relates to a sucker rod back-off tool, in particular to a sucker rod back-off anti-reversion device. The sucker rod back-off anti-reversion device comprises a brake base, a sucker rod clamping seat and a sucker rod clamp, wherein the brake base is used for being fixed to a wellhead, and a sucker rod penetrating hole is formed in the center of the brake base for a sucker rod penetrating through; the sucker rod clamping seat is rotationally assembled at the upper end of the brake base through a one-way rotating structure, a clamping seat center hole is formed in the sucker rod clamping seat, and the sucker rod penetrates through the clamping seat center hole; the sucker rod clamp comprises two clamping blocks, and clamping teeth are arranged on the sides, close to each other, of the two clamping blocks; and a locking structure is arranged between the two clamping blocks and used for enabling the clamping teeth to tightly hold the sucker rod to enable the sucker rod clamp tobe fixed to the sucker rod. The upper end of the sucker rod clamping seat extends out of the brake base, a rod clamp clamping groove is formed in the upper end of the sucker rod clamping seat, and anupward clamping opening is formed in the rod clamp clamping groove and used for allowing the sucker rod clamp to be embedded in so as to be in rotation stopping fit with the sucker rod clamp. According to the scheme of the sucker rod back-off anti-reversion device, the problems that in the prior art, when a sucker rod is reversely buckled, reversion is prone to happening, and potential safety hazards exist are solved.

Description

technical field [0001] The invention relates to an undercutting tool for sucker rods, in particular to an anti-reversal device for undercutting the sucker rods. Background technique [0002] When the oil well pump is used for oil production, the oil well pump is lowered into the oil pipe, and the oil is pumped by moving up and down; the oil well pump is connected to the oil well pump to drive the oil well pump to rise. As oilfield development and production enter the middle and late stages, formation sand production will often become more and more serious. After entering the wellbore, the sucker rod or pump piston will be buried and stuck. At this time, the oil pipe needs to be disassembled. Oil rod, which needs to be reversed on the sucker rod, reversely turning the sucker rod to separate the threaded thread between the two sections of the sucker rod body. In the prior art, the sucker rod is often clamped by a pipe wrench or a hydraulic tong with a special tool, and then t...

Claims

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Application Information

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IPC IPC(8): E21B17/043
CPCE21B17/043
Inventor 张建党李红跃张忠涛游静杨小刚郭文博
Owner 中石化石油工程技术服务有限公司