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Internal-pressure fatigue test device for well-completion pipe string of underground gas storage reservoir and test method thereof

A technology of completion pipe string and fatigue test, applied in the direction of testing material strength by applying repetitive force/pulsation force, measuring the increase and decrease rate of fluid, and measuring liquid tightness by liquid/vacuum degree, etc., which can solve natural gas leakage and other issues to achieve the effect of ensuring production safety, optimizing operating parameters, and ensuring safety

Active Publication Date: 2014-06-11
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the completion strings of the existing gas storage are basically produced under pressure in the annulus, which brings certain safety risks. Long-term pressure in the annulus can easily lead to natural gas leakage accidents. Once it leaks through the formation and into urban living areas, serious accidents will occur

Method used

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  • Internal-pressure fatigue test device for well-completion pipe string of underground gas storage reservoir and test method thereof
  • Internal-pressure fatigue test device for well-completion pipe string of underground gas storage reservoir and test method thereof
  • Internal-pressure fatigue test device for well-completion pipe string of underground gas storage reservoir and test method thereof

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Embodiment 1

[0049] see figure 1 , figure 2 , image 3 As shown, the embodiment of the present invention provides an underground gas storage well completion pipe string internal pressure fatigue test device, which is used to simulate the strength and tightness of the gas storage completion pipe string under the reciprocating radial pressure of injection and production. Obtain the structural performance and sealing performance of the underground gas storage completion string (including tubing string and casing string) under the reciprocating change of injection-production pressure, and obtain pressure change data such as sealing performance and fatigue strength under the internal pressure of the string, Realize the life management and reliability control of parts and components, and ensure the sealing integrity of the completion string; the device mainly includes: pressure transmission mechanism A, closed cavity mechanism B, control system C, leak detection system D and the string Sample...

Embodiment 2

[0058] The embodiment of the present invention provides an underground gas storage well completion pipe string internal pressure fatigue test method, mainly for simulating the structural strength and sealing integrity detection system method of the gas storage string under the reciprocating pressure changes of injection and production , obtaining the fatigue limit of failure under multiple alternating injection-production pressures in the completion pipe string, obtaining radial pressure change data such as sealing performance and fatigue strength, and guiding the injection-production operation of the gas storage and the selection of pipe string materials; the method includes: 1) Preparation of completion string for test, 2) Adjustment of pressure plate of pressure transmission mechanism, 3) Packaging of string sample, 4) Test and other main process steps, among which:

[0059] 1) Completion string preparation for testing

[0060] Step 1. Before the test, take necessary safety...

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Abstract

The invention discloses an internal-pressure fatigue test device for a well-completion pipe string of an underground gas storage reservoir and a test method thereof and belongs to the technical field of petroleum drilling well completion. The test device includes a pressure transmission mechanism, enclosed cavity mechanisms, a control system, leakage detection systems and a pipe string sample. The pressure transmission mechanism passes through an internal cavity of the pipe string sample from top to bottom. The upper and lower ends of the pipe string sample are packaged through the enclosed cavity mechanisms. The enclosed cavity mechanisms are connected with the control system. The leakage detection system is installed on the pipe string sample. Therefore, a test device of a simulating gas storage reservoir well-completion pipe string in a gas injection and gas production process is formed so that radial pressure change data of the well-completion pipe string are obtained. The internal-pressure fatigue test device for the well-completion pipe string of the underground gas storage reservoir and the test method thereof are capable of detecting the sealing performance and fatigue strength of well-completion pipe string joints under a plurality of changes of an internal pressure through use of a fatigue test machine so as to obtain the radial pressure change data and thus a design basis is provided to oil-field work personnel and operating parameters of the gas storage reservoir are optimized.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling and completion, in particular to an underground gas storage well completion pipe string internal pressure fatigue test device and a test method thereof. Background technique [0002] The underground gas storage is a kind of artificial gas field or gas reservoir formed by reinjecting the commercial natural gas transported by the long-distance pipeline into the underground space. Including the gas injection and gas production process, the gas injection of the underground gas storage refers to: when the flow of natural gas supplied by the upstream long-distance pipeline is greater than the user's consumption of the natural gas transmission and distribution network, the excess natural gas enters the process station of the gas storage After being pressurized by the special pressurizer, it is sent to each gas storage for storage. The design pressure at the outlet of the pressurizer is general...

Claims

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Application Information

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IPC IPC(8): G01M3/28G01N3/36
Inventor 王建军宋生印
Owner BC P INC CHINA NAT PETROLEUM CORP
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