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Replacing press gas oil extraction device and method

A technology of oil recovery device and gas source, which is applied in the field of replacing compressed gas oil recovery device, can solve the problems of poor oil recovery effect and large power, and achieve the effects of saving external gas source, high work efficiency and low cost

Active Publication Date: 2015-07-29
崔斌
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for oil and gas wells where the liquid level of the oil and gas well is as low as 3,000 meters and the energy of the formation is low, this method requires a lot of power, and the effect of oil recovery is not good.

Method used

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  • Replacing press gas oil extraction device and method
  • Replacing press gas oil extraction device and method

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Embodiment Construction

[0025] The structure of the present invention will be explained in detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 The structural diagram of the replacement compressed gas oil production device shown is a replacement compressed gas oil production device, which includes a casing 7, and the casing 7 is provided with an outer oil pipe 2, a gas source pipe A1 and a gas source pipe B5, and the outer oil pipe 2 is equidistantly spaced. Several sealing discs 4 are installed, and the sealing discs 4 divide the outer oil pipe 2 into several cavities, such as figure 2 As shown, from bottom to top, the 1st, 3rd, 5th... chambers are odd chambers 8, the 2nd, 4th, 6th... chambers are even chambers 9, and the upper part of each chamber corresponds to the odd / even numbered ones Seal the pan4.

[0027] The sealing disc 4 of the present invention has three functions: 1. divide the outer oil pipe 2 into odd chambers 8 and even chambers 9 spaced apart from...

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Abstract

The invention discloses a replacing press gas oil extraction device and method. The replacing press gas oil extraction device comprises a sleeve, wherein an outer oil pipe, an air source pipe A and an air source pipe B are arranged in the sleeve, seal discs are installed in the outer oil pipe at intervals, a odd number of seal discs are connected with the air source pipe A, and an even number of seal discs are connected with the air source pipe B. The lower side of each seal disc is connected with an inner oil pipe, and a one-way valve is installed at the lower end of the inner oil pipe. The replacing press gas oil extraction device method comprises the following steps of feeding air through the air source pipe B while performing exhausting through air source pipe A, then feeding air through the air source pipe A while performing exhausting through air source pipe B. By means of the replacing press gas oil extraction device and method, lifting pressure of natural gas is reduced, the air source with low pressure enables liquid in a deep well lifted to a well opening, and the replacing press gas oil extraction device is stable, safe and reliable in the lifting process. In addition, the natural gas adopted by the replacing press gas oil extraction device is recycled, and external air sources are saved.

Description

technical field [0001] The invention relates to the fields of oil recovery and gas recovery in oil and gas fields, in particular to an oil recovery device and method for replacing compressed gas. Background technique [0002] When the formation energy is reduced to the point where the oil well cannot self-flow, mechanical oil recovery is required. Among them, the oil recovery method that artificially injects high-pressure gas into the bottom of the well to make crude oil eject from the ground is called gas lift recovery method. [0003] The Chinese patent with application number 200410081589.9 discloses "A Device and Method for Air Injection Pressurized Oil Production and Liquid Discharge Gas Production". The high-pressure air pipe is connected to the wellhead casing through the ground gas injection pipe, and the downhole gas injection pipe can be oil pipe or oil casing Annular space; the casing extends from the wellhead to the bottom of the well, the concentric double tubi...

Claims

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Application Information

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IPC IPC(8): E21B43/16
CPCE21B43/121
Inventor 崔斌李开兴
Owner 崔斌
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