Blowout-prevention tool string of belt pressure energy storage well repairing machine

Abstract

The invention discloses a spraying-prevention tool string of a belt pressure energy storage well repairing machine, and the blowout-prevention tool string of the belt pressure energy storage well repairing machine is matched with a belt pressure energy storage well repair machine. The tool string comprises a four-ram blowout preventer, a shearing blowout preventer, a balancing device, an emptying device and a dual-ram blowout preventer; and the emptying device is connected with a sewage discharge pipeline. The tool string is sequentially connected with a rotary mechanism, a manual centering guide, the four-ram blowout preventer, a connecting platform short joint, the shearing blowout preventer, an annular blowout preventer, a lifting short joint, the balancing device, the emptying device and the dual-ram blowout preventer from bottom to top; and one end of the balancing pipeline is connected with the balancing device, and the other end of the balancing pipeline is connected with the rotary mechanism. The rotary mechanism enables the tool string to be strung on a part at any angle and to align with a well opening; when the manual centering device discharges a pipe column, the pipe column can be centered to the center of the well opening, and the manual centering device has an anti-clamping effect; and the blowout preventer is provided with a secondary seal structure, the secondary seal structure is not only convenient to operate, but also can reduce the pollution to the environment at the same time; and the service life of a device is prolonged, and the production cost is lowered.

Description

technical field [0001] The invention relates to pressure workover control equipment for oil wells, in particular to a blowout prevention tool string for a workover machine with pressure energy storage, which is used in conjunction with the workover machine with pressure energy storage. Background technique [0002] The hot workover blowout prevention tool string is connected and installed in sequence by various blowout preventers, and different types of blowout preventers are combined and installed together to form a blowout prevention tool string. It is an indispensable safety tool to ensure that the pressure in the annular space of the oil casing does not leak out during the workover operation of the oil-water-gas well under pressure without releasing the formation pressure in the wellbore. Now the blowout prevention tool strings for hot workover are widely used, but the arrangement sequence of the blowout prevention tool strings is different at present, but the main combi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a blowout preventer tool string for a workover rig with pressure energy storage, which overcomes the difficulties in the installation and positioning of the existing blowout preventer string at the wellhead, and the difficulty in replacing the blowout preventer seal during operation. Use with energy storage workover rig

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