Injection tool and application method for drainage and gas production in cooperation with downhole vortex tool

Abstract

The invention provides a spraying tool capable of being matched with an underground eddy current tool to realize water drainage and gas production and an application method of the spraying tool. The spraying tool capable of being matched with the underground eddy current tool to realize water drainage and gas production mainly consists of a salvage head (1), a diffusion pipe (2), a center pipe (3), a throat pipe (4), a pin (5), a nozzle position pipe (6), a spray nozzle (7), a spray nozzle support seat (8), a spray nozzle support pipe (9), a lower joint (10), a cone body (11), a shearing pin (12), a spring body (13), a spring pin (14) and a spring (15). The specific flowing state that the gas is in the center and the liquid flows along the pipe wall formed by the underground eddy current tool is used; the self energy of natural gas and a spray nozzle of a sprayer are used for realizing throttling and pressure reduction, so that the natural gas flow forms a pressure difference region in a mixing room; the well tube inner wall liquid flow is sucked; and the well tube liquid accumulation is reduced.

Description

technical field

[0001] The invention relates to the technical field of oil field gas recovery, in particular to a tool and an application method for applying injection technology to drainage and gas recovery in the process of natural gas recovery, belonging to the field of downhole tools. Background technique

[0002] The Sulige Gas Field is a typical "three-low" gas field with low pressure, low permeability, and low abundance. With the development of the gas field, the formation energy decreases, the gas production of gas wells decreases, and there is a large amount of fluid accumulation in the wellbore during the production process, and the fluid accumulation wells are increasing year by year. It is difficult to maintain the normal and stable production of the gas field. In response to the increasing number of liquid-loaded wells in gas fields, in order to give full play to the production capacity of gas wells, a series of drainage and gas recovery technologies such as foa...

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