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Air pressure testing method and system

A gas pressure test and gas pressure technology, applied in the field of detection, can solve problems such as difficulty in quantification, and achieve the effects of high sensitivity, convenient volume conversion, and easy leakage

Pending Publication Date: 2017-11-24
QINGDAO ZHONGRUITAI MESNAC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple in principle and convenient in structure, and can detect the volume of V2 and V1 leakage gas. However, when measuring the V0 level required by the standard, it can only be qualitative but difficult to quantify, and it is difficult to measure.

Method used

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  • Air pressure testing method and system

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Experimental program
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Effect test

Embodiment approach 1

[0038] combined with figure 1 An embodiment of the air pressure test system of the present invention for performing air pressure tests on packers is described.

[0039] Such as figure 1 As shown, this embodiment adopts a modular design concept to divide the packer air pressure test system into different functional modules, including a test gas source 1, a high pressure test module 2, a packer setting test module 3, a vacuum device 4, Low-voltage test module 5, data processing module 6, temperature rise and heat preservation module 7.

[0040] Among them, in the packer setting test module 3, the tested packer 32 is set in the test wellbore 33, and the packer 32 and its seal 321 divide the inner chamber of the test wellbore 31 into a lower chamber 33 and an upper chamber. 34, wherein the part of the cavity containing the packer central tube 322 is the upper cavity 34, and the part of the cavity that does not accommodate the packer central tube 322 is the lower cavity 33.

[0...

Embodiment approach 2

[0049] An embodiment of the method for performing a pneumatic test on a packer of the present invention will be described in conjunction with Embodiment 1. This embodiment is to test the central tube.

[0050] First, install the tested packer in the test wellbore 31 and set it.

[0051] Then open the upper cavity low pressure test switch valve 51, the lower cavity low pressure test switch valve 52, start the vacuum device 4, extract the air in the upper cavity 34, the lower cavity 33 to a vacuum state, and the data processing module 6 passes the upper cavity low pressure pressure sensor 56, The lower chamber low-pressure pressure sensor 58 records the initial pressures of the upper chamber 34 and the lower chamber 33 .

[0052] Open the center pipe high pressure test switch valve 21, close the upper cavity high pressure test switch valve 22 and the lower cavity high pressure test switch valve 23, start the test gas source 1, and raise the gas pressure in the packer center tub...

Embodiment approach 3

[0057] Another embodiment of the method for performing a pneumatic test on a packer according to the present invention will be described in conjunction with Embodiment 1. In this embodiment, the upper chamber is tested at a high temperature.

[0058] First, install the tested packer in the test wellbore 31 and set it.

[0059] Open the upper chamber high-pressure test switch valve 22, close the central tube high-pressure test switch valve 21, the lower chamber high-pressure test switch valve 23, start the test gas source 1, and increase the gas pressure in the upper chamber 34 to the standard API SPEC 11D1 "Petroleum and Natural Gas Industry- Downhole Tools - Packers and Bridge Plugs" test pressure, pressure stabilization, upper chamber high pressure pressure sensor 26 transmits the pressure signal at this time to the data processing module 6 .

[0060] Open the lower chamber low pressure test switch valve 52, start the vacuum device 4, extract the air in the lower chamber 33...

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Abstract

The invention provides a packer air pressure testing method and system. The method comprises the following steps: (1) a packer is mounted in a test shaft and set; (2) gas pressure in cavities being tested is improved to reach test pressure; (3) gas pressure in cavities into which gas may be leaked is detected, a molar weight or a volume at atmospheric pressure of leaked gas can be converted based on change of the gas pressure. After the first step and before the third step, gas in the cavities into which gas may be leaked is drawn in such a way that the cavities are in a vacuum state, an amount of n1 is reduced, sensitivity is improved, and measurement of leakage of microscale gas can be facilitated; when pressure tends to zero, gas tends to satisfy an ideal gas state equation, and therefore conversion of a volume of leaked gas n2 can be facilitated; V0 grade measurement required by API standards can be qualitative and quantitative.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a pneumatic test method and a test system. Background technique [0002] According to the oil and gas drilling industry standards, packers, blowout preventers, wellhead devices, etc. need to be tested for air pressure. The authoritative API standard of the industry has 7 design confirmation levels for packers ranging from low to high V6 to V0. Among them, V2 , V1, V0 have gas test requirements, requiring "air, nitrogen or other gases or mixed gases as the test medium", "pressure test at least 15min", wherein V2, V1 gas leakage cannot exceed a certain volume standard, and V0 It is required that there is no bubble accumulation, and the packer used in high-pressure and high-temperature environment (pressure > 103MPa or temperature grade > 177°C) should also be tested at the highest rated temperature, higher than or equal to the highest rated pressure. "Experimental Research...

Claims

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Application Information

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IPC IPC(8): G01M3/28G01M3/32G01M3/34
CPCG01M3/2846G01M3/3272G01M3/34
Inventor 刘芳杰孙进正刘建
Owner QINGDAO ZHONGRUITAI MESNAC TECH CO LTD
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