A Mechanical Tension Tubing Anchor

Abstract

The invention relates to the technical field of oil tube fixing equipment and discloses a mechanical type tension oil tube anchor. Slip sheets are distributed on the outer side of the middle part of acenter tube circumferentially; the outer end surface of each slip sheet is a plane; sawteeth are formed in the surface of the slip sheet; the sawteeth are arranged in two columns longitudinally; single column of sawteeth are arranged in a squamous staggered way; a round-sheet-shaped limiting blade is embedded at the middle position of the lower end part of the slip sheet; a spring groove is formed in the middle part of the left side surface of the slip sheet; a reset spring is embedded in the spring groove; the two ends of the reset spring are connected with the inner groove surface of the spring groove and the outer surface of the center tube. The mechanical type tension oil tube anchor is provided with double columns of sawtooth cutting edges and can cooperate with the limiting blades adopting vertical type blade mounting, so that rotation of an oil tube anchoring part is avoided and the influence on the seat sealing anchoring effect is avoided; in addition, the slip is retracted and reset by the reset spring, and the slip sheets can be folded and reset automatically after anchoring work is completed and when a joint base is lifted.

Description

technical field [0001] The invention relates to the technical field of oil pipe fixing equipment, in particular to a mechanical tension oil pipe anchor. Background technique [0002] In the process of downhole measure operations and rod pumping production, due to the influence of some factors (continuous drop of dynamic liquid level, deeper and deeper pump hanging, hot washing measures, etc.), the production or measure string will inevitably face There are some problems such as expansion and contraction of the pipe string and deterioration of the stress state. At present, the downhole tubing anchor (hereinafter referred to as tubing anchor) is mainly used to solve the above problems on site. [0003] The tubing anchor is a downhole device for anchoring downhole tubing strings in production and measure wells. It can improve the stress state of the tubing string, reduce the fatigue damage of the tubing string, control the expansion and contraction of the tubing string, reduce...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a mechanical tension tubing anchor with double-arranged sawtooth cutting edges, which can cooperate with the limit blades installed with vertical blades to prevent the anchor slips from slipping on the surface of the pipe wall. Horizontal rotation, that is, to avoid the rotation of the tubing anchor and to avoid affecting the anchoring effect of the seat seal. At the same time, the return spring is used to retract and reset the slips. After the anchoring work is completed, when the joint seat is lifted, the slips are automatically closed. , Reset, reasonable design, simple operation, easy to popularize and use, etc., solves the problem that the existing mechanical tension tubing anchor is easy to cause the overall horizontal rotation due to the effect of pressure during use, making the anchor unreliable, complicated to operate, and inconvenient to carry out Repeated use, low work efficiency

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