Drainage device for liquid in pulling-out tubular column, tubular column pulling-out structure and tubular column pulling-out method

Abstract

The invention provides a drainage device for liquid in a pulling-out tubular column, a tubular column pulling-out structure and a tubular column pulling-out method. The drainage device for the liquid in the pulling-out tubular column comprises a first fan-shaped column body, a second fan-shaped column body and a third fan-shaped column body, the second fan-shaped column body is hinged to the first fan-shaped column body; the rubber plates are arranged on the inner wall of the first fan-shaped column body and the inner wall of the second fan-shaped column body, the first fan-shaped column body and the second fan-shaped column body can relatively rotate to a closed state, and in the closed state, the first fan-shaped column body and the second fan-shaped column body drive the rubber plates to form a closed barrel shape in a surrounding mode; a liquid drainage through hole is formed in the rubber plate; and the locking mechanism can lock the first fan-shaped column body and the second fan-shaped column body in the folding state. According to the invention, the technical problem in the prior art that liquid in the oil pipe can be poured outwards when the oil pipe column is pulled out for construction is solved.

Description

technical field [0001] The invention relates to the field of petroleum engineering, in particular to a liquid drainage device in a pipe string, a pipe string lifting structure and a pipe string pulling out method. Background technique [0002] With the prolongation of the production time of deep well pump oil wells, workover operations are required due to failures or measures; in the construction procedures of workover operations, the important link is to pull out the tubing string from the downhole of the oil well. The bottom end of the tubing string is connected to the deep well pump, and the bottom end of the deep well pump is a fixed Val seat seal. In actual production, failures such as oil drain not opening, piston stuck in the work barrel, and sucker rod breakage often occur. At this time, the liquid in the tubing string remains in the pipe and cannot be leaked. , when the oil pipe thread is removed, a liquid column about 10 meters high in the oil pipe will form a liq...

AI Technical Summary

Problems solved by technology

[0003] (1) Oil pouring and splashing cause serious pollution to the equipment;

[0004] (2) The pouring and splashing of oil will cause serious pollution to the operating staff and cause great inconvenience to the staff;

[0005] (3) The cost of cleaning up the oil surface contamination increases;

[0006] (4) Cleaning up the oil surface pollution increases the labor intensity of employees

[0007] (5) At the same time, for the consideration of operation and construction, the oil well should be replaced by 30 cubic meters of oil before normal construction. After the oil pipe cannot be drained, it is necessary to increase the amount of oil and water replacement until clean water can be seen at the wellhead. Due to the serious underground deficit, a large amount of water Staying at the bottom of the well will affect the steam injection effect, thereby affecting the cycle production of the measure well;

[0009] At present, in the prior art, during the construction of the oil pipe string, there is a technical problem that the liquid in the oil pipe will pour out, and it is difficult to meet the provisions of the environmental protection law that the oil liquid does not fall to the ground.

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