Sieve pipe self-locking switch controller

Abstract

The invention relates to a sieve pipe self-locking switch controller. The sieve pipe self-locking switch controller is mainly composed of a conical sliding rail connector, a movable stirring block, a spring pressing cap, a reset spring and a front guiding head. Two to six dovetail grooves evenly distributed in the circumferential direction of the axis are machined in a conical structure body of the conical sliding rail connector. The movable stirring block is of a round flaw structure, and T-shaped sliding rails are machined on the bottom face, arranged in the dovetail grooves of the conical sliding rail connector and are in sliding fit. A rod head is machined at the front end of the movable stirring block, the top end of the rod head makes contact with one end of the spring pressing cap, and the spring pressing cap is arranged on a shaft outer sleeve of the front guiding head and is in sliding fit. The reset spring is arranged between the spring pressing cap and the front guiding head shoulder part. The end of the front guiding head is a conical body. The sieve pipe self-locking switch controller is used in cooperation with a sand control sieve pipe with a self-locking switch, one or more sand control sieve pipes at the assigned position under a well can be controlled according to the actual needs and can be made to put into production or quit production, and accordingly the purposes of flow adjusting, water controlling and production system optimizing are achieved.

Description

technical field [0001] The invention relates to the field of downhole tools for oil well fracturing and oil production, in particular to a screen pipe self-locking switch manipulator capable of changing the functional state of a sand control sand filter pipe. Background technique [0002] The downhole sleeve switch is widely used in fracturing and oil production, and the fluid channel connecting the inside and outside of the working string is artificially opened and closed according to actual needs. The methods of controlling the switch action of the downhole sliding sleeve usually include electric control, hydraulic control, ball throwing (or throwing darts) and running into the sliding sleeve control tool. The above control methods have their own characteristics: [0003] The electronic control method is usually used in oil production, that is, the downhole cable connected to the ground drives the downhole motor to control the sliding sleeve (or special piston). The electr...

AI Technical Summary

Problems solved by technology

The advantage of this patent is that it can effectively control the sliding sleeve at the designated position, but the disadvantages are also obvious, such as: a large amount of construction work for manipulation (tools are specially inserted, and the wellhead is required to cooperate with pressure); high positioning requirements (the convex shoots must be stuck just right) The opening and closing action can only be completed by entering the matching groove); it is required to only operate one sliding sleeve at a time, and the construction efficiency is low (in order to prevent misoperation, the size of the convex bamboo shoot can only match the groove of a designated sliding sleeve)

[0005] The applicant has previously applied for "sand control screen with self-locking switch" (utility model patent application number: 201720464297.6, invention patent application number 201710294013.8), but lacks more matching special tools

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