Mechanical oil production well full-bore scale-preventing plugging tubular column tool

Abstract

The invention provides a mechanical oil production well full-bore scale-preventing plugging tubular column tool. A steel ball A is placed in a hole of an upper center pipe and inserted into an annulargroove of a release, a piston A is arranged on the upper center pipe in a sleeved manner and fixed to the release through a shear pin, and a steel ball lock mechanism is constituted. An inner fishingcenter pipe is inserted into the center pipe and fixed to the upper center pipe through a shear pin. The maximum outer circle on the inner fishing center pipe is in contact with the valving positionof the upper center pipe. A lock sleeve A is arranged on the center pipe A in a sleeving manner, inserted into a unblocking sleeve and fixed to the center pipe A through a shear pin. An outer sleeve Bis arranged on the unblocking sleeve in a sleeving manner and connected to the piston B. A bull plug is inserted into a guide head. By the adoption of the mechanical oil production well full-bore scale-preventing plugging tubular column tool, releasing of the tool is convenient, the mechanical oil production well full-bore scale-preventing plugging tubular column tool can smooth descend in the shell, the release is smoothly unlocked, selection of fishing tools is more convenient and freedom; and the mechanical oil production well full-bore scale-preventing plugging tubular column tool has thefeatures of low releasing pressure and large through diameter and guarantees the long-term effectiveness of plugging.

Description

technical field [0001] The invention belongs to an oil production equipment in an oil field, in particular to a full-diameter anti-scaling plugging pipe string tool for a mechanical production well. Background technique [0002] At present, many oil fields have entered the middle and late stages of production, especially for reservoirs with low permeability, most of them use chemical flooding or ASP flooding to increase production. At present, the ASP flooding production well of the pumping unit adopts the plugging pipe string that is sealed under the pump, but after the ASP flooding production well enters the scaling cycle, the scale amount is large and the scale is loose, and the scale flakes formed on the pump will be deposited on the pump. Losing hands leads to clogging in the column, reducing the liquid production volume, or even no liquid production volume. After the operation string was pulled out, it was found that there were a large number of scale sheets in the pl...

AI Technical Summary

Problems solved by technology

At present, the ASP flooding production well of the pumping unit adopts the plugging pipe string that is sealed under the pump, but after the ASP flooding production well enters the scaling cycle, the scale amount is large and the scale is loose, and the scale flakes formed on the pump will be deposited on the pump. Losing hands in the column will lead to clogging, reducing the liquid production volume, or even no liquid production volume

After the operation string was pulled out, it was found that there was a large amount of scale in the plugging string, which caused the liquid inlet channel to be blocked

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