CN201972627U

CN201972627U - Fastener embedded type centralizer for oil suction pipes

Info

Publication number: CN201972627U
Application number: CN2011200886989U
Authority: CN
Inventors: 纪拥军; 江洪; 胡金艳; 徐德志
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-23
Filing date: 2011-03-23
Publication date: 2011-09-14
Anticipated expiration: 2021-03-23

Abstract

The utility model relates to fastener embedded type centralizer for oil suction pipes, which mainly comprises a concave half portion, a convex half portion and an inner hexagon screw, a dovetail portion of the inner side of the convex half portion is embedded into a groove of a corresponding portion of the inner side of the concave half portion, after the concave half portion and the convex half portion are spliced, two sides are fixedly connected into a whole by the inner hexagon screw. The fastener embedded type centralizer is novel in concept, simple in structure, easy to manufacture, low in cost, convenient in assembling and use and reliable in working, eccentric wear between an oil suction pipe and the inner wall of an oil pipe is effectively avoided by the aid of the centralizer, the service life of a downhole string of a pumping well is prolonged, and regular production of an oil well is facilitated.

Description

Setting-in buckle-type oil pumping rod centering device

Technical field:

The utility model relates to a kind of downhole hardware that is used for the pumpingh well manufacturing process, belongs to oil recovery downhole tool class.

Background technology:

So far for a long time, rod-pumped well is main means of raw oil exploitation and approach always.In this kind mechanical oil production model, normally used is to utilize sucker rod to drive oil well pump, and piston pumps, with crude oil from underground extraction ground.Because casing programme aspect such as hole deviation, sucker rod are easy to generate the eccentric wear phenomenon between sucker rod and the oil pipe when moving up and down incessantly, very unfavorable to oil well down-hole string life-span and ordinary production.To this, the on-the-spot oil pumping rod centering device that uses usually solves this problem, after on the rod string centralizer being installed, centralizer can be free to slide between sucker rod external diameter and tube inner wall, thereby reaches the purpose of avoiding or alleviating eccentric wear between sucker rod and the oil pipe.At present, the on-the-spot oil pumping rod centering device kind of using is in many styles, the structure difference, general effect is good, but still exist manufacture cost higher, shortcoming and defect such as convenient inadequately, that result of use is not ideal enough are installed.

The utility model content:

The purpose of this utility model is to provide a kind of buckle-type setting-in oil pumping rod centering device that cost is low, easy to install, result of use is good of manufacturing.

The utility model is to realize like this.This kind oil pumping rod centering device is made up of recessed half one, protruding half one and soket head cap screw, the swallow-tail form position of protruding half inboard is inlaid in the groove of the inboard corresponding site of recessed half, after the relative assembly unit of concave, convex halves, both sides fasten as one with the soket head cap screw connection respectively.During use, earlier recessed half one of centralizer is placed on the sucker rod, then protruding half one is advanced in the groove of recessed half one, penetrate concavo-convex halves tightened to one with two soket head cap screws again and get final product.At this moment, a plurality of centralizer integral body are sleeved on the sucker rod outside successively, can be free to slide in rod string pumps process, thereby reach the purpose of effectively avoiding sucker rod and tube inner wall to rub mutually.

The utility model is novel, and is simple in structure, is easy to make, cost is low, assemble easy to use, reliable operation, utilize it can effectively avoid between sucker rod and the tube inner wall eccentric wear taking place, prolong pumpingh well down-hole string application life, help the oil well ordinary production.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A-A sectional drawing of Fig. 1.

The specific embodiment:

As shown in the figure, the utility model is made up of recessed half one 1, protruding half one 2, soket head cap screw 3.Wherein, recessed half one 1, protruding half one 2 are two relative engagement, the semi-circular ring that structure is identical, and the two pars intermedia protrudes respectively, and both sides interconnect the position and are swallow-tail form, cooperatively interact and outwards protrude.Soket head cap screw 3 adopts the M5 soket head cap screw.This kind oil pumping rod centering device important technological parameters is as follows: length overall 120mm, maximum outside diameter ￠ 58 is suitable for pipe aperture ￠ 62mm, No. 40 steel of material, 350 ℃ of heatproofs.

Claims

1. buckle-type setting-in oil pumping rod centering device, form by recessed half one (1), protruding half one (2), soket head cap screw (3), it is characterized in that: protruding half one (2) inboard swallow-tail form position is inlaid in the groove of the inboard corresponding site of recessed half one (1), and both sides use soket head cap screw (3) connection to fasten as one respectively after recessed half one (1), the relative assembly unit of protruding half one (2).

2. buckle-type setting-in oil pumping rod centering device according to claim 1, it is characterized in that: recessed half one (1), the semi-circular ring that protruding half one (2) is two relative engagement, structure is identical, the two mid portion protrudes respectively, and both sides interconnect the position and are swallow-tail form, cooperatively interacts and outwards protrudes.