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Metal rubber bearing and sealing-based expandable liner hanger joint

A liner hanger, metal rubber technology, used in sealing/packaging, drill pipe, casing, etc., can solve the problems of rubber not resistant to high temperature, insufficient bearing capacity, easy to age, etc., to increase friction and bearing capacity The effect of improving and increasing the contact area

Inactive Publication Date: 2015-04-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects existing in the prior art, effectively solve the problems that the rubber is not resistant to high temperature, easy to corrode, easy to age, and insufficient bearing capacity when the liner hanger is in service, and to provide an expansion joint based on metal rubber bearing and sealing. Liner hanger connector

Method used

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  • Metal rubber bearing and sealing-based expandable liner hanger joint
  • Metal rubber bearing and sealing-based expandable liner hanger joint
  • Metal rubber bearing and sealing-based expandable liner hanger joint

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Embodiment Construction

[0025] In conjunction with the accompanying drawings, further describe the specific implementation process of the present invention, as figure 1 , image 3 , Figure 4 , Image 6 shown.

[0026] The present invention includes casing 1, variable diameter tail pipe 3, expansion cone 4, and metal rubber cylinder 2. The outer wall of the upper section of variable diameter tail pipe 3 is equipped with metal rubber cylinder 2 equidistantly. Outside the tail pipe 3, the expansion cone 4 is installed at the lower end of the tail pipe 3; the rubber barrel 2 is made of metal rubber material, and the outer wall of the tail pipe 3 matched with the metal rubber barrel 2 has a rough surface structure with knurling treatment 3- 1; The inner wall of the mating part of the bushing 1 and the metal rubber cylinder 2 has a rough surface structure 1-1 after sandblasting.

[0027] Taking the 140*114 expansion hanger as an example, the specification of the main part of the variable diameter tail...

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Abstract

The invention relates to the field of petroleum drilling, well completion and cementing equipment, in particular to a metal rubber bearing and sealing-based expandable liner hanger joint. The joint comprises a bushing, a variable diameter liner, sealing elements and an expansion cone, wherein the sealing elements sleeve the outer wall of the upper section of the variable diameter liner in an equal spacing manner; the part, which is provided with the sealing elements, of the variable diameter liner sleeves in the bushing; the expansion cone is arranged on the variable diameter liner; the basic conception of the joint is that metal rubber cylinders are adopted as the sealing elements, the metal rubber cylinders closely sleeve the outer wall of the variable diameter liner, rough surfaces which are subjected to roughness machining are adopted as the outer wall surface of the variable diameter liner of a matching section for the metal rubber cylinders to sleeve and the inner wall of the bushing on the matching sections of the metal rubber cylinders. The metal rubber cylinders are adopted as the sealing elements; the mounting surfaces of matching parts are roughened to realize structural stability, high sealing property, extremely high oil resistance and acid resistance and anti-aging property, prolong the service life of the expandable liner hanger joint, improve the working efficiency and reduce the operation cost.

Description

1. Technical field [0001] The invention relates to the field of oil drilling, well completion and cementing equipment, in particular to an expansion liner hanger joint based on metal rubber bearing and sealing. 2. Background technology [0002] Expansion casing technology is a new engineering technology that has developed rapidly in recent years. As the key technology of expansion casing, the expansion casing suspension system can be applied to related expansion casing technologies such as liner suspension, casing subsidy, and open hole plugging tieback. It plays a vital role in the application of liner completion and cementing such as sidetracking well, deepening well, deep well drilling, etc. It can provide effective liner head sealing and is an attractive downhole tool in the field of petroleum engineering. [0003] The expansion hanger mainly relies on the sealing element to realize the isolation between the casing and the casing annulus, to isolate the pressure transmis...

Claims

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Application Information

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IPC IPC(8): E21B17/02E21B33/04
CPCE21B23/01
Inventor 徐书根王冲王建军
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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