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Injecting air boosting oil production and liquid discharging gas producing device and method

A technology for liquid drainage, gas production, and air injection. It is applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc. It can solve the problems of insecurity, explosion, and expensive nitrogen production equipment, and achieve strong applicability and operation. Easy to manage effects

Inactive Publication Date: 2005-08-03
SOUTHWEST PETROLEUM UNIV
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AI Technical Summary

Problems solved by technology

At present, the high-pressure gas widely used in gas lift production and liquid drainage gas production at home and abroad is a non-explosive gas such as natural gas and nitrogen. Air injection gas lift is easy to explode and is unsafe. It is currently prohibited to use
The reason is that the air injected into the well contacts and mixes with the oil and gas in the well. When the mixing ratio reaches the explosion limit of the air, an explosion will occur and cause an accident.
However, natural gas is scarce in many areas, and nitrogen requires expensive nitrogen-generating equipment and high maintenance costs

Method used

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  • Injecting air boosting oil production and liquid discharging gas producing device and method

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing.

[0011] The high-pressure air is injected into the annular space of the oil casing (between 4 and 5) through the ground gas injection pipe 3 according to a certain gas injection pressure and gas injection volume, and reaches the power gas inlet of the gas booster pump 7 at the downhole packer 6; the high-pressure air is injected into the gas One end of multiple air motors of the booster pump 7 pushes the motor pistons to move, and the other end of the motor pistons discharges the exhausted air from the air outlet, and the exhausted exhausted air is discharged to the Ground exhaust air outlet 9, the injection air system does not contact with the well fluid. The movement of the motor piston drives the pump piston, and the suction valve at the suction end of the pump drills the well. The well fluid enters the suction end of the pump cylinder of the gas booster pump 7 from the p...

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Abstract

The present invention relates to oil and gas extracting apparatus and method suitable for high pressure natural gas well and nitrogen source well, and aims at raising the hydrocarbon reservoir yield via lowering the pressure in bottom of gas lift well. Independent air injecting and extracting system is adopted and air does not content with fluid in well in the whole course. The technological scheme of the present invention includes: injecting high pressure air via ground pipe and oil jacket to pneumatic motors in booster pump to drive motor pistons and exhausting the exhaust air to ground; driving the pump piston with the pneumatic motors to pump the well fluid to well head. The present invention can avoid explosion during oil and gas extraction, and is especially suitable for low pressure low potential oil / gas well.

Description

technical field [0001] The invention relates to a device and method especially suitable for oil recovery and liquid drainage gas recovery of wells without high-pressure natural gas and nitrogen gas sources, belonging to the field of oil and natural gas exploitation. Background technique [0002] In the process of exploiting oil and natural gas, when the formation energy is sufficient, oil and gas wells can be produced by self-spraying; when the formation energy is reduced and the water content is not enough to maintain self-spraying production, it is necessary to supplement energy and switch to artificial lift production . Commonly used artificial lifting methods include: rod pump, gas lift, electric submersible pump, hydraulic piston pump, hydraulic jet pump, gas jet pump, hydraulic pneumatic pump, foam drainage, etc. At present, the high-pressure gas widely used at home and abroad for gas lift oil recovery and liquid drainage gas recovery is natural gas, nitrogen and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/10E21B43/18
Inventor 刘建仪杜志敏孙瑜贾春生
Owner SOUTHWEST PETROLEUM UNIV
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