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Pressure resistance detecting device for petroleum underground tool

A detection device and technology for oil wells, which are applied in the direction of using liquid/vacuum for liquid tightness measurement, measurement, wellbore/well components, etc., can solve the problems of high cost, long test period, complex system, etc., and achieve low cost , the test cycle is short, the effect of ensuring personal safety

Inactive Publication Date: 2010-07-14
XIHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of the existing downhole tool performance testing device, such as the need to drill a test well, complex system, long test period, and high cost when testing the pressure resistance performance of the downhole tool, and provide a fast and accurate A low-cost detection device for detecting the pressure resistance and sealing performance of downhole tools

Method used

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  • Pressure resistance detecting device for petroleum underground tool
  • Pressure resistance detecting device for petroleum underground tool
  • Pressure resistance detecting device for petroleum underground tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 2 As shown, both ends of the downhole tool have water inlet and outlet interfaces, wherein one end of the downhole tool (31) is connected to the low-pressure water outlet interface (30), and the other end is connected to the high-pressure water outlet interface (29). Before the test, first raise the end of the downhole tool (31) connected to the high-pressure water outlet interface (29), then open the gas circuit shut-off valve (2), water shut-off valve (19), high-pressure shut-off valve (27), and close the water shut-off valve (21) and high pressure shut-off valve (26).

[0024] The test process is as follows: After the compressed air is introduced from the air inlet (1), it passes through the air circuit stop valve (2) and the air filter (3), and then is decompressed to the set value by the proportional pressure reducing valve (4) controlled by the computer. , the computer sends a signal to connect the electromagnetic reversing valve (9), the compress...

Embodiment 2

[0026] Such as image 3 As shown, only one end of the downhole tool has a water inlet and outlet interface. Before the test, first raise one end of the downhole tool (32) connecting pipe to facilitate the discharge of air, and then open the gas shut-off valve (2), water shut-off valve (19), high pressure Stop valve (26), close water stop valve (21), high pressure stop valve (27).

[0027] The test process is as follows: After the compressed air is introduced from the inlet (1), it passes through the air circuit stop valve (2) and the air filter (3), and then is decompressed to the set value by the proportional pressure reducing valve (4) controlled by the computer. The computer sends a signal to energize the electromagnetic reversing valve (9), and the compressed air enters the low-pressure air-driven liquid pump (11). The high-pressure water shut-off valve (26) is injected from the interface of the tool to be tested at last, and this process is a water injection process. Du...

Embodiment 3

[0029] Such as Figure 4 Shown is the flow chart of the fully automatic test control module, combined below figure 2 , image 3 and Figure 4 to explain its working process.

[0030] The working process of the fully automatic test control module is as follows: first, initialize the settings through the computer, including setting the gas drive pressure P0, low pressure P1, high pressure P2, number of water inlet N, pressure holding time T1, single head exhaust times M, Double head exhaust time T2. After the initialization is completed, the pressure of the proportional pressure reducing valve (4) is adjusted according to the set value of P0, and after reaching the set value, the number of water inlet heads N is judged. N=1 is single water inlet (such as image 3 shown), N=2 for double-headed water inlet (such as figure 2 shown). When N=1, the electromagnetic reversing valve (9) is energized, the electromagnetic reversing valve (12) is de-energized, water injection is s...

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Abstract

The invention discloses a pressure resistance detecting device for a petroleum underground tool, which is used for detecting the pressure resistance and the sealing property of an underground tool used in the petroleum drilling industry and overcomes the defects of long test period of the existing technical equipment, test well drilling need and high cost. A pressurization system is used for pressurizing by adopting gas-drive liquid. The device is characterized in that the pressurization system consists of a gas-drive liquid pump, a gas-drive loop and a liquid loop. The liquid loop consists of a low-pressure water (or hydraulic oil) loop, a high-pressure water (or hydraulic oil) loop, an exhaust pressure-releasing loop and a safety control loop. The test system pressure is continuously adjusted through a proportional valve (4); and the proportional control signal of a proportional pressure-reducing valve is controlled by a computer. The test process can fully-automatically operate or can be manually operated. The device can test a to-be-tested tool with ports at two ends, and also can test a to-be-tested tool with a port at one end.

Description

Technical field: [0001] The invention relates to a pressure-resistant performance testing device for high-voltage devices, in particular to a pressure-resistant performance testing device for downhole tools in the oil drilling industry, which mainly solves the pressure-resistant performance and sealing performance detection problems of downhole tools before going into the well. Background technique: [0002] In oil drilling operations, downhole tools are subjected to complex loads, including torsional loads, tension and compression loads, impact loads, and liquid pressure. Therefore, in the process of developing the downhole tool and before the downhole tool goes into the well, its various performance indicators must be tested. At present, the existing downhole tool testing system in our country needs to drill an experimental well, and the experimental equipment is complicated and costly. For example, the patent No. 00108834.3 discloses a downhole tool performance testing d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26E21B47/00
Inventor 刘克福雷玉勇冉竞王进戈蒋代君邓成中向中凡刘星
Owner XIHUA UNIV
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