CN201883958U - Centralizer - Google Patents

Abstract

The utility model provides a centralizer which belongs to devices used for oil extraction and comprises a centralizer main body, wherein two ends of the centralizer main body are provided with a joint and another joint; and a polymer sleeve is installed at the outside of the middle part of the centralizer main body and is internally provided with an axial wear-resisting rod. For the centralizer, the wear-resisting rod can be made by wear-resisting copper, so that wear resistance under high temperature can be achieved and good use characteristics can be achieved under high temperature, and the wear-resisting rod can scratch the soft dirt on the inner wall of an oil well casing, so that the attrition of the soft dirt on the polymer sleeve can be reduced, service life is long, the overhaul period of an oil well is prolonged and the oil extraction production cost is lowered.

Description

Centralizer

Technical field

The utility model provides a kind of oil recovery device, especially a kind of centralizer.

Background technology

For a long time, in field produces, correct the sucker rod of sucker-rod pumping well and the eccentric wear between the oil well casing, use centralizer.Present centralizer anti-wear performance is low, functional performance variation at high temperature, and application life is short.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of improved centralizer, to improve its application life.

The utility model is achieved in that centralizer, and it has the centralizer main body, and centralizer main body two ends have joint and another joint respectively, and polymeric jacket is equipped with in the outside, middle part of centralizer main body, and axial abrasion-proof stick is arranged in the polymeric jacket.

Adopt the centralizer of said structure, abrasion-proof stick can become with wear-resisting copper, realized wear-resisting under the high temperature, good functional performance is at high temperature also arranged, abrasion-proof stick also strikes off effect to the soft dirt on the oil well casing inwall, thereby can reduce the wearing and tearing of soft dirt to polymeric jacket, long service life, prolong the oil well time between overhauls(TBO), reduced the oil recovery cost of production.

Description of drawings

Fig. 1 is the main pseudosection of the utility model structure.

Fig. 2 is the cross-sectional view of the polymeric jacket in the utility model.

The specific embodiment

The embodiment that provides below in conjunction with accompanying drawing illustrates concrete structure of the present utility model.

As shown in drawings, the centralizer of the utility model, it has centralizer main body 1, and centralizer main body two ends have joint 5 and another joint 6 respectively, and polymeric jacket 2 is equipped with in the outside, middle part of centralizer main body, and abrasion-proof stick 4 is longitudinally arranged in the polymeric jacket.

The macromolecule polymer material that described polymeric jacket can adopt aviation to use is made, and this material has advantages such as density is big, hardness is high, abrasion resistance is good.

During use, joint and the sucker rod above it are connected and fixed, and another joint is connected and fixed by its box cupling of installing above 3 another sucker rod below it, thereby this centralizer is installed between the two joint sucker rods.

Claims (1)

1. centralizer is characterized in that, it has centralizer main body (1), and centralizer main body two ends have joint (5) and another joint (6) respectively, and polymeric jacket (2) is equipped with in the outside, middle part of centralizer main body, and axial abrasion-proof stick (4) is arranged in the polymeric jacket.

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