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 deformation of rib plate, insufficient restoring force of elastic casing centralizer, poor centralizing effect, etc., so as to reduce resistance, avoid Good deformation and righting effect

Active Publication Date: 2020-12-01
胜利油田固邦石油装备有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Anti-deformation elastic casing centralizer
  • Anti-deformation elastic casing centralizer
  • 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 an anti-deformation elastic casing centralizer, and relates to the technical field of casing centralizers. The anti-deformation elastic casing centralizer comprises a sleeve frame and a hoop. A sleeve opening is formed in the sleeve frame. A plurality of arc-shaped grooves are formed in the outer wall of the sleeve frame. Rib plates are arranged in the arc-shaped grooves. First supports are fixedly connected to one ends of the rib plates. Second supports are hinged to the rib plates. Second sliding grooves and first sliding holes are formed in the inner walls of the groove bottoms of the arc-shaped grooves. Sliding frames are slidably connected in the second sliding grooves. According to the anti-deformation elastic casing centralizer, the first supports, the secondsupports, first sliding blocks and second sliding blocks are arranged. In the use process, the first supports and the second supports play a role in supporting the rib plates. When the rib plates areextruded, first springs and second springs contract at the same time, the first sliding blocks slide, the second sliding blocks drive the second supports to move, and the first supports slide, so that the rib plates contract into the arc-shaped grooves, deformation of the rib plates is avoided, the reset force of the anti-deformation elastic casing centralizer is greatly increased, 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 Applications(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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