Lifting valve type underground inside-outside integrated blowout preventer

Abstract

The invention relates to a lifting valve type underground inside-outside integrated blowout preventer which mainly comprises a shell, a transmission assembly, a sliding sleeve, a spring, a blocking body and a passage part, wherein the transmission assembly, the sliding sleeve and the spring are arranged in the shell; the blocking body is embedded in an inward dent in the lower shell; the passage part is positioned on the shell; the transmission assembly is provided with a sensor, a circuit board, a motor, a coupling, a screw rod and a lifting valve; the lower end of the transmission assembly is provided with the sliding sleeve; the sliding sleeve is connected with the spring; the blocking body is provided with a rubber cylinder, a rubber cylinder bracket, a valving claw and a piston; the upper end of the rubber cylinder bracket contacts the steps of the shell, and the lower end is connected with the valving claw; the lower end of the valving claw is provided with a deblocking sleeve; the rubber cylinder is arranged outside the rubber cylinder bracket; and the lower end of the rubber cylinder is connected with the piston; and the passage part is an overflow hole passage positioned on the rigid body of the shell and comprises a liquid inlet, a circulation port and a pressure relief port. The blowout preventer can realize integrated blocking in the annulus between the inside and the outside of the underground drill stem, thereby effectively preventing hazards on the part of workers and equipment when unusual conditions (such as well blowout, well kick and the like) happen.

Description

technical field [0001] The invention belongs to a downhole tool in oil drilling operations, and mainly relates to a blowout preventer capable of fully closing the internal channel of the drill string and the annulus of the drill string when abnormal conditions such as blowout and kick occur. Background technique [0002] In the drilling process, the current common blowout preventer includes the blowout preventer valve inside the drill string and the blowout preventer system outside the drill string. Drill string outer annular blowout prevention system mainly refers to the wellhead blowout preventer group, usually including single ram blowout preventer, double ram blowout preventer, annular blowout preventer and universal blowout preventer. Internal blowout prevention tools mainly refer to blowout prevention special tools installed on the drill pipe string, including upper and lower kelly plug valves, drill pipe back pressure valves, new drill pipe back pressure valves, drop-...

AI Technical Summary

Problems solved by technology

When there are abnormal situations such as overflow during drilling, because these two types of tools are used separately, this makes the work efficiency low, the degree of automation is low, increases the operating intensity of workers in the process of blowout prevention, and increases the human error in operation operational risk

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