Bidirectional blowout-prevention ball seat for control over fluid in water well shaft

Abstract

The invention belongs to the technical field of oil production engineering, and relates to a bidirectional blowout-prevention ball seat for control over fluid in a water well shaft. The bidirectional blowout-prevention ball seat is designed for solving the problem that secondary blowout prevention cannot be achieved by a conventional ball seat. The bidirectional blowout-prevention ball seat is composed of an upper joint (1), a lock ring sleeve (2), a sliding sleeve dowel (3), an impact sliding sleeve (4), a piston dowel (5), baffles (6), a lock ring (7), a check ring (8), a piston (9), a connector (10), a steel ball (11), a ball seat body (12), a movable plug dowel (13), a movable plug (14), a spring (15) and a lower joint (16), wherein the lock ring sleeve (2) is connected with the upper joint (1) in a threaded mode, the baffles (6) are connected with the impact sliding sleeve (4) in a threaded mode, the lock ring sleeve (2) is connected with the connector (10) in a threaded mode, and the connector (10) is connected with the lower joint (16) in a threaded mode. The bidirectional blowout-prevention ball seat can be used for control over fluid in a water well and has the advantages of being simple in structure, reasonable in layout, capable of preventing secondary blowout during water well work and the like.

Description

technical field [0001] The invention relates to the technical field of oil production engineering, and belongs to a two-way blowout prevention ball seat used for fluid control in well bores of water wells. Background technique [0002] At present, environmental protection is becoming more and more important. As the number of downhole operations increases year by year, venting and overflow pressure reduction will not only damage the formation pressure, but also cause environmental hazards. While ensuring oilfield production, it is necessary to avoid environmental pollution. Conventional The ball seat cannot achieve secondary blowout prevention during downhole operations. In order to solve this problem, a two-way blowout preventer ball seat has been developed. When the string is pulled up, it can seal the tubing passage and achieve secondary blowout prevention without killing the well. Measures to prevent formation pollution, can effectively control the overflow, is a real gre...

AI Technical Summary

Problems solved by technology

[0002] At present, environmental protection is becoming more and more important. As the number of downhole operations increases year by year, venting and overflow pressure reduction will not only damage the formation pressure, but also cause environmental hazards. While ensuring oilfield production, it is necessary to avoid environmental pollution. Conventional The ball seat cannot achieve secondary blowout prevention during downhole operations. In order to solve this problem, a two-way blowout preventer ball seat has been developed. When the string is pulled up, it can seal the tubing passage and achieve secondary blowout prevention without killing the well. Measures to prevent formation pollution, can effectively control overflow, is a real green operation

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