Underwater wellhead down-setting tool

Abstract

The invention discloses an underwater wellhead down-setting tool, and belongs to the technical field of offshore drilling tools. The underwater wellhead down-setting tool is designed to solve the problems of complex structures and cumbersome installation and the like in the prior art. The underwater wellhead down-setting tool comprises a core shaft, a driving cylinder, an elastic locking ring and an anti-rotating structure, the driving cylinder and the elastic locking ring are arranged on the core shaft in a sleeving mode, the driving cylinder is in threaded connection with the core shaft, and the anti-rotating structure is used for preventing the driving cylinder from rotating around the core shaft; when the core shaft is rotated, the driving cylinder can linearly move up and down, and the elastic locking ring can be squeezed or loosened by the driving cylinder during the linear up-down movement of the driving cylinder, so that the elastic locking ring can be locked tightly in a underwater wellhead when being squeezed and can be detached from the interior of the underwater wellhead when being loosened. The underwater wellhead down-setting tool is simple and compact in structure, easy to install and operate and more reliable in performance, few parts are used, and after the underwater wellhead is set down to the right place, the underwater wellhead down-setting tool can be detached from the underwater wellhead simply by driving the core shaft to rotate.

Description

technical field [0001] The invention relates to an operating tool for ocean drilling, in particular to an underwater wellhead running tool. Background technique [0002] Offshore oil and gas resources have become an important source of energy supply. The casing hanger is installed inside the subsea wellhead head, and the upper end is used to connect the blowout preventer group and the water riser. Safe and smooth installation of subsea wellheads is the basis for deepwater drilling, completion and exploration and development. [0003] However, the underwater wellhead is subject to harsh conditions during drilling, well completion, and production operations, and it needs to use special running tools to be sent into the seabed for installation. At present, the cam-driven form of underwater wellhead is commonly used to push the lock block into the connection groove of the underwater wellhead. The tool is connected by a cam-touched block, and the casing head seal is designed fo...

AI Technical Summary

Problems solved by technology

[0003] However, the underwater wellhead is subject to harsh conditions during drilling, completion, and production operations, and it needs to be sent to the seabed for installation using special running tools

At present, the cam-driven form of underwater wellhead is commonly used to push the lock block into the connection groove of the underwater wellhead. The tool is connected by a cam-touched block, and the casing head seal is designed for cementing operations. The tool structure is complex and the installation is cumbersome

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