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A test ring capable of measuring the radial contact stress inside and outside the rubber cylinder

A contact stress and stress testing technology, applied in the direction of measuring force, measuring device, instrument, etc., can solve the problem of measuring the radial contact stress between the rubber cylinder and the casing without effective means, so as to avoid the expansion and deformation of the pipeline, reduce the pressure, increase the The effect of reliability and security

Inactive Publication Date: 2017-08-25
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a test ring that can measure the radial contact stress inside and outside the rubber sleeve, which solves the problem that there is no effective means to measure the radial contact stress between the rubber sleeve and the casing

Method used

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  • A test ring capable of measuring the radial contact stress inside and outside the rubber cylinder
  • A test ring capable of measuring the radial contact stress inside and outside the rubber cylinder
  • A test ring capable of measuring the radial contact stress inside and outside the rubber cylinder

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the present invention will be further described:

[0022] A test ring capable of measuring the inner and outer radial contact stress of a rubber cylinder, comprising an outer contact stress test ring 1 and an inner contact stress test ring 2 .

[0023] Depend on figure 1 combine figure 2 As shown: the external contact stress test ring 1, its main body is an annular base 11, on the annular base 11 there are several radially stepped holes along the circumference, and an external pressure transmission piston 12 is inserted inside the radially stepped holes, and the radially stepped The outer side of the hole is fixedly connected to the first plug 13 by bolts 15. The pressure transmission contact surface 16 of the head of the external pressure transmission piston is on the same curved surface as the inner ring surface of the annular base. The above-mentioned external pressure transmission piston 12 and the first plug 13 Sea...

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Abstract

The invention discloses a test ring capable of measuring the radial contact stress inside and outside of a rubber tube, which solves the problem that there is no effective means to measure the radial contact stress between the rubber tube and a casing. It specifically includes the outer and inner contact stress test rings. The base of the test ring is provided with a number of radial stepped holes along the circumferential direction. The inner side of the stepped holes of the outer contact stress test ring is inserted with an external pressure transmission piston, a fixed plug on the outside, and an external pressure transmission piston head. The pressure transmission contact surface of the inner part is on the same curved surface as the inner ring surface of the annular base, and the installation direction of the inner pressure transmission piston and the plug of the inner contact stress test ring is opposite to that of the outer contact stress test ring; The airtight cavity between the pressure transmission piston and the plug is filled with liquid, and the plug body is provided with a hole communicating with the airtight cavity. The invention uses the property of liquid to transmit pressure, converts the radial contact stress test into hydraulic pressure for measurement, and the contact stress measurement data is true and reliable.

Description

technical field [0001] The invention relates to a contact stress measuring device, in particular to a device for measuring the contact stress between a rubber cylinder and a well wall. Background technique [0002] In oilfield water injection, water plugging and fracturing operations, the packer is a key component to separate the formation. The main components include the center pipe, the rubber cartridge group (including a middle rubber cartridge and two side rubber cartridges), and three-stage piston sleeves. Wait. The packer is connected to the downhole tubing string through threads, and after going down to the predetermined well depth, the surface pump unit pumps the liquid into the tubing string, and the fluid enters the piston sleeve through the hole on the center pipe to make it go up, and the rubber tube is compressed axially Later, the radial expansion deformation occurs, and the annular gap between the central tube and the inner wall of the casing is blocked. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/00
Inventor 丁宇奇李治淼徐斯塬陈淑艳赫广田安永庆
Owner NORTHEAST GASOLINEEUM UNIV
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