Oil pipe gas injection and water drainage technique and tools thereof

Abstract

The invention relates to an oil pipe gas injection and water drainage technique and tools thereof and belongs to the technical field of oil pipe gas injection and water drainage. According to the oil pipe gas injection and water drainage technique, gas is delivered into the top portion of an annular hollow space between an oil pipe and a sleeve, passes through the bottom of the oil pipe and then is discharged out of a shaft from a tubular column. In this way, in the gas moving process, all loading liquid in the shaft can be drained efficiently, the problems that in the existing gas injection and water drainage technology, the recovery efficiency is low, the pressure bearing capacity is low, and self-test sealing cannot be achieved are solved, and requirements of oil field production are met. In addition, the tools of oil pipe gas injection and water drainage are ingenious in design, after all the operation tools are connected into the tubular column, setting and releasing can be achieved at a time by putting the tubular column into the shaft, operation is easy, and torque does not need to be provided; and furthermore, an isolation packer of the operation tubular column has a self-test sealing function, effective setting of the tubular column is guaranteed, and normal production of gas injection and water drainage of the shaft is guaranteed.

Description

technical field [0001] The invention relates to an oil pipe gas injection and drainage process and a tool thereof, belonging to the technical field of oil pipe gas injection and drainage. Background technique [0002] With the further demand for energy and the increasing concern for the environment around the world, the development of natural gas technology has become a trend in the contemporary world. In natural gas production, with the gradual reduction of gas reservoir pressure and natural gas flow velocity, the produced water or condensate in the gas reservoir cannot be carried out of the wellbore with the natural gas flow, and thus remain in the wellbore. These liquids accumulate at the bottom of the well for a period of time, forming a liquid column, causing additional hydrostatic back pressure on the gas reservoir, resulting in a continuous decline in the self-flowing energy of the gas well. This phenomenon is called "fluid accumulation in gas well". "Flooding in ga...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a gas injection and drainage process for oil pipes that can solve the problems of low recovery, low pressure bearing capacity and no self-test seal existing in the existing gas injection and drainage technology. and its tools

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