Coiled tubing speed pipe column and liquid draining and gas collecting method

Abstract

The invention discloses a coiled tubing speed pipe column. The coiled tubing speed pipe column is downwards conveyed to a preset position by coiled tubing equipment, the tail end of a second coiled tubing is blocked by a stopper, setting is carried out by a hanger, the setting effect can be detected by pumping liquid in annular space which is formed by an oil pipe and the coiled tubing speed pipe column, the second coiled tubing is communicated with the annular space formed by the coiled tubing speed pipe column and the oil pipe by knocking out the stopper, a hydraulic releasing tool is used for carrying out releasing operation on the hanger, and a first coiled tubing, a first coiled tubing connector and the hydraulic releasing tool can be pulled out and put into production by the coiled tubing equipment after the releasing operation is completed. According to the coiled tubing speed pipe column provided by the invention, the coiled tubing speed pipe column is arranged in a specific position of an oil pipe in a setting way, compared with a mode in the prior art that the coiled tubing speed pipe column is arranged in a wellhead in a hanging way, the coiled tubing speed pipe column has the advantages that the length of used coiled tubings is shortened, and the problem that a gas well problem which is caused by untimely supply of the coiled tubing cannot be solved in time is solved.

Description

technical field [0001] The invention relates to the technical field of petroleum engineering, in particular to a coiled tubing velocity string and a method for liquid drainage and gas recovery. Background technique [0002] The gas well enters the middle and late stages of production. Due to the drop in gas layer pressure, the water volume in the low-pressure well increases, the liquid carrying capacity of the gas becomes poor, and the wellbore fluid accumulation increases, which affects the normal production of the gas well and even shuts down. In the prior art, the velocity tube is generally used The column drainage gas recovery technology improves the liquid-carrying capacity of the gas and restores the gas well to a state of stable production. [0003] The coiled tubing velocity string suspended in the tubing is composed of coiled tubing, coiled tubing joint, hydraulic hand, velocity string hanger and plug. Conventional coiled tubing velocity strings hang coiled tubing ...

AI Technical Summary

Problems solved by technology

Conventional coiled tubing velocity strings hang the coiled tubing at the wellhead, which requires a long length of coiled tubing. Since the processing period of the coiled tubing is limited by the domestic processing level, the processing speed is relatively slow, resulting in the production problem of the gas well cannot be effectively solved

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