CN2934555Y - Oil pipe tension anchoring compensator - Google Patents

Abstract

A tubing tension anchoring compensator consists of an outer cylinder, an anti-swing key, a joint and a core tube. The top of the core tube is arranged in the inner part of the outer cylinder. The top of the joint is connected with the lower part of the outer cylinder; a part of the anti-swing key is arranged in a keyway above the joint-thread; and the other part of the anti-swing key is arranged in a keyway of the core tube. The anti-swing key and the keyway are used for transmission torque of tubing in favor of the technical operation of workover operation. The outer cylinder and the core tube could do mutual shrinkage, but would not separate from each other with the help of the joint and the internal shoulder of the outer cylinder. When an anchor is arranged under the tubing tension anchoring compensator, the extension and shortening of the tubing caused by the upward and downward movement of the oil well pump can be eliminated, avoiding tubing bending within the casing, preventing biased friction between the sucker rod and the tubing, improving the reliability of the oil pumping tubing string and the rod, extending the service life of the sucker rod and the tubing and well repair free period, thereby improving the oil well pump efficiency and the mechanical production efficiency, increasing the oil production.

Description

Tubing tension grappling expansion loop

One, technical field

The utility model relates to the oil production equipment of petroleum industry, and particularly a kind of tubing tension grappling expansion loop belongs to engineering goods.

Two, background technology

In sucker-rod pumping system, when sucker rod drive oil well pump pumped oil pumping, fluid column load alternating action was on oil pipe and sucker rod, and oil pipe and sucker rod produce elongation to be shortened, reduce the oil well pump pump efficiency on the one hand, can influence the reliability of pumping pipe string and roofbolt work on the other hand.The way that solves pumping pipe string elongation shortening at present is to adopt anchoring device, and anchoring device is anchored on pumping pipe string on the sleeve pipe, makes pumping pipe string not extend shortening with the variation of up-down stroke.Existing anchoring device has two types, and a class anchoring device is to lean on fixedly oil pipe of oil pipe weight, and such anchoring device causes the bending of pumping pipe string easily, causes sucker rod and oil pipe eccentric wear, influences the operate as normal of pumping pipe string and roofbolt.Another kind of anchoring device is to rely on fixedly oil pipe of the inside and outside pressure official post anchoring device action of tubing and casing, and this class tubing anchor need be suppressed, when disanchoring sometimes pin cut and constantly cause the card tubing string.

Three, summary of the invention

The purpose of this utility model is a kind of tubing tension grappling expansion loop of design, eliminate oil pipe and shorten problem with the elongation that pumping of oil well pump causes, improve the oil well pump pump efficiency, avoid oil pipe crooked in sleeve pipe, prevent sucker rod and oil pipe eccentric wear, improve the reliability of pumping pipe string and roofbolt work.

The purpose of this utility model is achieved in that by urceolus, antirotation keys, joint, interior pipe to be formed, and interior pipe top is sleeved on urceolus inside.Joint top connects with the urceolus bottom, and there is tubing round thread inside on the urceolus, and a shoulder is arranged under the tubing round thread, interior tube head has boss, this boss is on the urceolus under the inner shoulder, also is on the upper end of joint face, and the boss cylindrical cooperates with inwall under the urceolus inner circular bead.External surface under the interior pipe boss is processed with keyway, and keyway is arranged on the joint screw thread, lays the part of antirotation keys in the keyway on the joint screw thread, and another part of antirotation keys is installed in the keyway of interior pipe.The effect of antirotation keys, keyway is to make the oil pipe transfer torque, carries out technical operation when being convenient to workover treatment.In can stretch mutually between pipe and the urceolus, but on joint and urceolus, can not separate under the inner circular bead effect.

The beneficial effects of the utility model are: when cooperating the installation anchor under the tubing tension grappling expansion loop, can eliminate oil pipe and shorten problem with the elongation that pumping of oil well pump causes, avoid oil pipe crooked in sleeve pipe, prevent sucker rod and oil pipe eccentric wear, improve the reliability of pumping pipe string and roofbolt work, prolong the application life and the oil well repair free period of sucker rod and oil pipe, improve oil well pump pump efficiency and mechanical oil recovery efficient, increase oil well output.

Four, description of drawings

Accompanying drawing is the utility model embodiment assembling drawing.

Five, the specific embodiment

Below in conjunction with Fig. 1 first kind of embodiment of the utility model described.

Among the figure: the 1st, urceolus, the 2nd, antirotation keys, the 3rd, joint, 4 interior pipes.Be that the utility model is made up of urceolus 1, antirotation keys 2, joint 3, interior pipe 4, interior pipe 4 tops are sleeved on urceolus 1 inside.Joint 3 tops connect with urceolus 1 bottom, and there is tubing round thread inside on the urceolus 1, and a shoulder is arranged under the tubing round thread, interior pipe 4 heads have boss, this boss is on the urceolus 1 under the inner shoulder, also is on joint 3 upper surfaces, and the boss cylindrical cooperates with inwall under urceolus 1 inner circular bead.External surface under interior pipe 4 boss is processed with keyway, on joint 3 screw threads keyway is arranged, and lays the part of antirotation keys 2 in the keyway on joint 3 screw threads, and another part of antirotation keys 2 is installed in the keyway of interior pipe 4.The effect of antirotation keys 2, keyway is to make the oil pipe transfer torque, carries out technical operation when being convenient to workover treatment.In can stretch mutually between pipe 4 and the urceolus 1, but on joint 3 and urceolus 1, can not separate under the inner circular bead effect.

This tubing tension grappling expansion loop is installed under the oil well pump, anchor is installed in its bottom, after the anchor grappling, tubing string does not bear axial compression on the pump, and oil pipe is not crooked, and interior pipe 4 is motionless with anchor, shoulder on the urceolus 1 elongation back urceolus 1 under the internal whorl contacts with interior pipe 4 tops, thereby oil pipe on the pump is fixed, reached and eliminate the purpose that the oil pipe elongation is shortened, avoided oil pipe crooked in sleeve pipe.

Claims (3)

1, a kind of tubing tension grappling expansion loop is characterized in that: be made up of urceolus (1), interior pipe (4), interior pipe (4) top is sleeved on urceolus (1) inside.

2, according to the described tubing tension grappling of claim 1 expansion loop, it is characterized in that: joint (3) top connects with urceolus (1) bottom, urceolus (1) is gone up inside tubing round thread, one shoulder is arranged under the tubing round thread, interior pipe (4) head has boss, this boss is in urceolus (1) to be gone up under the inner shoulder, also is on joint (3) upper surface, and the boss cylindrical cooperates with inwall under urceolus (1) inner circular bead.

3, tubing tension grappling expansion loop according to claim 1, it is characterized in that: the external surface under interior pipe (4) boss is processed with keyway, on joint (3) screw thread keyway is arranged, lay the part of antirotation keys (2) in the keyway on joint (3) screw thread, another part of antirotation keys (2) is installed in the keyway of interior pipe (4).

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