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Gas pressure buffering device of underground associated gas and method

A kind of air pressure buffer, associated gas technology

Pending Publication Date: 2020-10-20
张郭祎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing technology has the following disadvantages: some existing oil wells have a large amount of associated gas, resulting in high gas pressure at the bottom of the well, and the large gas-liquid pressure will impact the oil well pump and the check valve, so that the one-way The valve cannot be closed, which directly causes the oil well to not be filled with liquid

Method used

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  • Gas pressure buffering device of underground associated gas and method
  • Gas pressure buffering device of underground associated gas and method
  • Gas pressure buffering device of underground associated gas and method

Examples

Experimental program
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Embodiment 1

[0026] Refer to attached Figure 1-3 , a downhole associated gas pressure buffer device provided by the present invention includes a housing 100 and a pneumatic device 200, a base 210 is fixedly installed at the bottom of the housing 100, and the base 210 is set in a cross shape, which facilitates the entry of associated gas into the high-pressure chamber 280. The air pressure device 200 is fixedly installed on the right side of the base 210, the base 210 has a supporting effect on the air pressure device 200, the inner wall of the air pressure device 200 is slidably connected to the piston 230, and the bottom of the piston 230 is fixedly connected to the base 210 through the return spring 220, and the return spring 220 For the stretching effect on the piston 230, the right side of the piston 230 is fixedly connected to the spring rod 250, and the piston 230 has a propulsion effect on the spring rod 250. The piston core of the piston 230 is processed by high-quality forged stee...

Embodiment 2

[0034] Refer to the attached Figure 4 , a downhole associated gas pressure buffer device in this embodiment, further comprising a worm rod 160 and a helical blade 165;

[0035]Further, a support rod 120 is fixedly installed at the right end of the inner wall of the casing 100, and a bearing 140 is fixedly installed at the center of the support rod 120, and the bearing 140 is sleeved at the center of the worm rod 160, and the spiral blade 165 is welded on the surface of the worm rod 160.

[0036] The specific implementation scenario is: when using the present invention, those skilled in the art need to replace the turbofan 130 with the worm 160 and the spiral blade 165 .

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Abstract

The invention relates to a gas pressure buffering device of underground associated gas and a method. The gas pressure buffering device of the underground associated gas comprises a shell and an gas pressure device, wherein a base is fixedly installed at the bottom of the shell, the gas pressure device is fixedly installed on the right side of the base, a piston is slidably connected to the inner wall of the gas pressure device, the bottom of the piston is fixedly connected with the base through a reset spring, a spring rod is fixedly connected to the right side of the piston, a baffle is fixedly connected to the right side of the spring rod, and a second sealing strip is connected to the bottom of the baffle in a pasting mode. The gas pressure buffering device of the underground associatedgas and the method have the beneficial effects that a gas-liquid pressure pushes the piston, the piston pushed the spring rod, the spring rod pushes the baffle, the baffle and a high-pressure cavityconnector form a gap, high-pressure gas and liquid flow to a low-pressure cavity from the gap, when the pressure is normal, the reset spring rebounds and pulls back the piston, the piston drives the baffle to close the high-pressure cavity connector, and the effect of automatically removing the pressure is achieved.

Description

technical field [0001] The invention relates to the technical field of oil field equipment, in particular to a downhole associated gas pressure buffer device and method. Background technique [0002] Associated gas, usually refers to the natural gas that coexists with petroleum. Associated gas is a combustible mixture composed of hydrocarbon gas mainly composed of low molecular saturated hydrocarbon and a small amount of non-hydrocarbon gas in the subsurface porous formation. It is the gaseous form of petroleum. Most of the gas is mainly methane, including ethane, propane, etc., and also contains a small amount of ammonia, sulfur dioxide, hydrogen sulfide, etc. According to the oil generation theory of organic hydrocarbon formation, the evolution of organic matter can generate liquid hydrocarbons and gaseous hydrocarbons. Gaseous hydrocarbons are either dissolved in liquid hydrocarbons, or exist in the upper part of the oil and gas reservoir in the state of gas cap. These tw...

Claims

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Application Information

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IPC IPC(8): E21B43/00E21B43/12
CPCE21B43/00E21B43/12
Inventor 李楠
Owner 张郭祎