Self-installed ocean floor drilling template and installation method thereof

Abstract

The invention discloses a self-installed ocean floor drilling template and an installation method thereof. The self-installed ocean floor drilling template comprises a pile foundation, a guide post and a wellhead guide framework, the pile foundation is a suction pile, the suction pile and the guide post are connected into an integral structure through the wellhead guide framework, the integral structure can be conveniently leveled in the suction immersion process, and a pump opening is formed in the wellhead guide framework and used for installing a submersible pump for extracting water in the suction pile. The self-installed ocean floor drilling template has the advantages that the self-installed ocean floor drilling template can be assisted in underwater towing by a buoy and can be lowered in water by an inherent small lifting device on a ship after reaching an installation position, the template can be leveled in the negative pressure immersion process of the suction pile, piling operation and grouting operation are omitted, a special leveling device for leveling operation is omitted, installation procedures of an offshore drilling template are simplified, offshore installation period is shortened, and construction cost is reduced.

Description

technical field [0001] The invention relates to the field of marine drilling engineering, in particular to a self-installing subsea drilling template and an installation method thereof. Background technique [0002] In offshore oil development, in order to shorten the offshore installation period and save investment costs, the pre-drilling scheme on the subsea template is usually adopted. After the pre-drilling is completed, temporarily close the well, then install the jacket and upper module, and finally use the workover rig on the platform to perform tie-back and well completion operations. Since the drilling operation and the engineering design and construction of platform structure facilities can be carried out at the same time, this solution greatly shortens the development period before commissioning. The subsea drilling template is a structural facility for pre-drilling operations. The traditional subsea drilling template is fixed to the seabed by driving piles. ...

AI Technical Summary

Problems solved by technology

The traditional subsea drilling template installation process includes hoisting operations, piling operations, leveling operations and grouting operations. The required construction equipment includes barges for loading and transporting subsea drilling templates and piles, and buoys for hoisting subsea drilling templates and piles. Cranes, special levelers for subsea drilling template leveling, piling hammers, grouting equipment, etc., not only have a long construction period, but also high construction costs

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