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Mechanical loading type packer rubber sleeve simulation loading sealing experiment device and method

A technology of mechanical loading and experimental equipment, which is applied in the direction of measuring equipment, testing of mechanical components, testing of fluid tightness, etc., and can solve problems such as only measuring contact pressure and inaccurate applied load

Pending Publication Date: 2020-10-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problem that the existing packer rubber tube test device can only measure the contact pressure because of the inaccurate load applied, the test device can better simulate the working environment of the packer at different temperatures and pressures under high temperature and high pressure in the well. The characteristics of simplicity and convenient operation provide an important guarantee for the improvement and promotion of the performance of the packer

Method used

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  • Mechanical loading type packer rubber sleeve simulation loading sealing experiment device and method
  • Mechanical loading type packer rubber sleeve simulation loading sealing experiment device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] figure 1 The shown packer test device can measure the contact stress distribution of the rubber sleeve 8 under different loads. When measuring the contact stress of the rubber sleeve 8, first place the rubber sleeve 8 and the spacer ring 5 on the support element 14 in sequence, and then Install the central tube 4 to press the rubber tube 8 tightly, and then install the loading beam 2 and the nut 1. After the tool is installed in place, adjust the performance of the strain sensor 7 and the pressure sensor 13. After confirming that the performance of the sensor is correct, install the strain sensor 7 and the pressure sensor. The reading on the digital display screen of 13 is zero, start to use the wrench to turn the nut 1 to move down, the torque and axial load are transmitted to the loading beam 2, due to the action of the loading beam 2, the upper torque is eliminated, it is designed in this way, so that the center The tube 4 is pressed against the spacer ring 5 only by...

Embodiment 2

[0048] When it is necessary to measure the sealing performance of the rubber cartridge 8, the preset pressure gas can be injected from the high-pressure fluid injection head 11, and the injection is stopped when the pressure in the cavity reaches the requirement. At this time, the change rule of the pressure sensor value with time is recorded. The sealing performance of the rubber cartridge 8 can be judged according to the change of the pressure value.

Embodiment 3

[0050] To test the influence of temperature on rubber core deformation and sealing performance, through the water injection valve 16 installed on the heat preservation shell 14, an appropriate amount of water can be injected into the heat preservation shell 14, and then the electric heating device 15 heats the water, and the electric heating device 15 Automatic control can be performed to maintain the water temperature at a constant temperature. After the test is finished, water can be discharged from the water outlet valve 12.

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Abstract

The invention discloses a mechanical loading type packer rubber sleeve simulation loading sealing experiment device and method. A loading system comprises a base, a supporting element and a driving mechanism. A pressurizing system comprises a central pipe and a sleeve, and a pressure bearing table is arranged in the center of the upper surface of the base. The lower end of the supporting element is fixed to the center of the pressure bearing table, the supporting element is sleeved with a rubber cylinder assembly, the bottom end face of the rubber cylinder assembly is pressed on the pressure bearing table, the rubber cylinder assembly and the pressure bearing table are contained in an inner cavity of the sleeve through the sleeve, the bottom end of the sleeve is fixed to the base, and thelower end face of the central pipe enters the sleeve and is pressed on the rubber cylinder assembly. A heating system is arranged on the periphery of the sleeve. Contact stress distribution of the rubber sleeve under different working conditions can be measured, and the sealing performance of the rubber sleeve can be tested. The problems that an existing packer rubber sleeve test device is inaccurate in load application and can only measure contact pressure are solved.

Description

technical field [0001] The invention relates to a simulation experiment device for downhole tools in the petroleum industry, in particular to a mechanically loaded packer rubber cylinder simulation loading and sealing experiment device and method. Background technique [0002] With the development of oilfields in the middle and late stages, the difficulty of oil and natural gas drilling and production is increasing, and the reservoir characteristics and downhole working conditions of oil, gas and water wells are more complex, which puts forward higher requirements for the performance of packers. [0003] Packer is an essential downhole tool for oil and gas production. Its key element is the rubber cartridge with superelasticity and sealing ability. It is the only component that can carry the sealing load and is widely used in well completion, water injection, water plugging, acidizing , fracturing, sand control, mechanical oil recovery, gas lift and other oil recovery proces...

Claims

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Application Information

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IPC IPC(8): G01M3/32G01M13/00G01L5/00
CPCG01L5/00G01M3/3272G01M13/00
Inventor 赵小龙张全胜叶金胜周承诗辛林涛孙骞于学信姜国良杨洁曹雪梅
Owner CHINA PETROLEUM & CHEM CORP
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