An anti-deformation elastic casing centralizer

A technology of elastic casing and centralizer, which is applied in the direction of casing, drill pipe, drill pipe, etc., can solve the problems of poor centralization effect, insufficient reset force of elastic casing centralizer, deformation of ribs, etc., and achieve good centralization effect, Avoid deformation and reduce resistance

Active Publication Date: 2021-01-15
胜利油田固邦石油装备有限责任公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the ribs on the centralizer in the prior art are often deformed due to extrusion, resulting in insufficient reset force and poor centralization effect of the elastic casing centralizer, and propose a deformation-resistant elastic casing centralizer

Method used

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  • An anti-deformation elastic casing centralizer
  • An anti-deformation elastic casing centralizer
  • An anti-deformation elastic casing centralizer

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0030] refer to Figure 1-6 , an anti-deformation elastic casing centralizer, comprising a sleeve frame 1 and a hoop 7, a sleeve opening 9 is opened in the sleeve frame 1, a plurality of arc-shaped grooves 4 are opened on the outer wall of the sleeve frame 1, and a plurality of arc-shaped grooves 4 are evenly distributed in the circumferential direction on the sleeve frame 1. Ribs 2 are arranged in the arc groove 4, and the ribs 2 are connected in contact with the arc groove 4. The shape and size of the ribs 2 match the arc groove 4, and the ribs One end of the plate 2 protrudes from the arc-shaped groove 4 and is embedded with a plurality of balls 3. One end of the ...

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Abstract

The invention discloses a deformation-resistant elastic casing centralizer, which relates to the technical field of casing centralizers, and comprises a sleeve frame and a hoop. A sleeve opening is opened in the sleeve frame, and a plurality of arc-shaped grooves are opened on the outer wall of the sleeve frame. A rib plate is arranged in the arc-shaped groove, and one end of the rib plate is fixedly connected with a first bracket, and a second bracket is hinged on the rib plate. A sliding frame is slidably connected in the second chute. In the present invention, by setting the first bracket, the second bracket, the first slider and the second slider, in the process of use, the first bracket and the second bracket play a role in supporting the rib plate, when the rib plate is squeezed , the first spring and the second spring contract at the same time, the first slider slides, the second slider drives the second bracket to move, and the first bracket slides, so that the rib plate shrinks into the arc-shaped groove, avoiding the rib plate The deformation greatly increases the restoring force of the anti-deformation elastic casing centralizer, and the centralizing effect is better.

Description

technical field [0001] The invention relates to the technical field of casing centralizers, in particular to a deformation-resistant elastic casing centralizer. Background technique [0002] The casing centralizer is a device installed on the casing string to center the casing string in the wellbore. It has the characteristics of simple structure, convenient use, long service life and relatively low cost. Using the casing centralizer can not only ensure The cement sheath outside the casing string has a certain thickness, which can also reduce the resistance when running the casing, avoid sticking the casing, and help improve the cementing quality. Casing centralizers are generally divided into two types: elastic centralizers and rigid centralizers. A few of them are semi-rigid. Most of the rigid centralizers have a slightly larger inner diameter than the casing. Can. The materials are cast steel, aluminum alloy and high-performance polymer. There are braided and welded el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/10
CPCE21B17/1078
Inventor 董惠芹周玉华杨守亮秦军彦赵兆霞孙志鹏
Owner 胜利油田固邦石油装备有限责任公司
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