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Testing ring for measuring inner and outer radial contact stress of rubber sleeve

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: 2015-11-25
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • 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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  • Testing ring for measuring inner and outer radial contact stress of rubber sleeve
  • Testing ring for measuring inner and outer radial contact stress of rubber sleeve
  • Testing ring for measuring inner and outer radial contact stress of rubber sleeve

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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 to 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 with the first plug 13 by bolts 15, and 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 plu...

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Abstract

The invention discloses a testing ring for measuring the inner and outer radial contact stress of a rubber sleeve, and solves a problem that there is no effective means to measure the radial contact stress between the rubber sleeve and a casing pipe. The testing ring specifically comprises an outer contact stress testing ring and an inner contact stress testing ring, and a plurality of radial step holes are circumferentially arranged on a testing ring pedestal, wherein outer pressure-transmitting pistons are inserted in the inner sides of the step holes of the outer contact stress testing ring, plugs are fixed to the outer sides of the step holes, the pressure-transmitting contact surfaces of the heads of the outer pressure-transmitting pistons and the inner ring surface of the ring-shaped pedestal are on the same curved surface, and the mounting direction of inner pressure-transmitting pistons and plugs of the inner contact stress testing ring is the opposite direction of the outer contact stress testing ring; a sealing cavity between the pressure-transmitting piston and the plug of each above radial step hole is full of liquid, and holes communicated with the sealing cavities are arranged in the plug bodies. The testing ring adopts liquid to transmit the pressure, the radial contact stress test is converted to a test by using the hydraulic pressure, and the contact stress test data is real 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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IPC IPC(8): G01L1/00
Inventor 李治淼徐斯塬陈淑艳刘巨保赫广田安永庆
Owner NORTHEAST GASOLINEEUM UNIV
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