Emergency rescue device for wellhead reconstruction

Abstract

The invention relates to an emergency rescue device for wellhead reconstruction. The emergency rescue device comprises a hydraulic drilling slip assembly, a blowout preventer, a rescue connecting part and a full-sealing ram blowout preventer which are sequentially connected to the top of a cut wellhead sleeve. An oil and gas well blowout emergency rescue well control system is rapidly rebuilt through the hydraulic drilling slip assembly and the blowout preventer, the hydraulic drilling slip assembly achieves rapid connection of the emergency rescue device of the upside-down blowout preventer and the wellhead sleeve, and the problem that a conventional blowout preventer and the wellhead sleeve cannot be installed in blowout rescue operation is solved; the upside-down installed blowout preventer located on the lower portion and the wellhead sleeve of an out-of-control well form a sealing block for preventing liquid flow from leaking downwards, the full-sealing ram blowout preventer located on the upper portion serves as a full-sealing whole set of the emergency rescue device, and a sealed emergency rescue channel is formed between the upside-down installed blowout preventer and the full-sealing ram blowout preventer, emergency rescue operation is carried out through a rescue connecting part side outlet located in the emergency rescue channel, and further expansion of accidents can be completely avoided.

Description

technical field [0001] The invention relates to the technical field of drilling well control emergency rescue equipment, which is used for rebuilding a wellhead well control system for oil and gas well blowout out of control emergency rescue operations after cutting a casing, and more specifically relates to a rebuilding wellhead emergency rescue device. Background technique [0002] In the process of oil exploration and development, once the high-pressure gas-bearing fluid at the bottom of the well is out of balance with the circulating mud, the high-pressure fluid will overflow to the wellhead and a well kick will occur. If the control is not timely or the operation is wrong, a blowout will occur, causing personnel and Equipment accidents, polluting the environment. During the blowout emergency operation, it is necessary to re-establish the wellhead well control system, try to install the blowout preventer to the wellhead, and carry out the well killing emergency operation...

AI Technical Summary

Problems solved by technology

Due to the high blowout pressure, personnel and equipment cannot approach the wellhead where the blowout occurs. The bottom flange of the wellhead casing is damaged or has been cut due to emergency operations. The lower flange of the conventional blowout preventer cannot be installed in place with the wellhead casing, which is difficult to install. The timing of emergency rescue operations is often delayed, causing further losses in personnel, equipment, and the environment

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