Drilling system having slot for underwater storage of BOP assembly

Abstract

The present invention relates to a drilling system having a slot for underwater storage of a BOP assembly, and the object of the invention is to provide a drilling system having a slot for underwater storage of a BOP assembly, wherein a drillship can move by enabling a BOP assembly to be suspended underwater without bringing the BOP assembly to the inside of the hull if the short-distance movements of the drillship, in which the BOP assembly is suspended underwater for the purpose of drilling another hole or for another purpose, are required. To this end, a drilling system of the present invention comprises: a derrick which is installed on the platform of a stationary structure or a floating structure; an activity which is installed on said derrick, forms a drilling hole on a sea-bed, and carries out installation of a casing pipe assembly and a BOP assembly in the formed drilling hole; a BOP trolley, which is installed to be positioned on the lower part of said derrick, forms the BOP assembly by assembling a plurality of risers and BOPs together with said activity, and moves by allowing the formed BOP assembly to be supported thereon; and a slot which is formed on a work stand of a moon pool in order to be extended in parallel with the direction of movement of said BOP trolley, and suppresses shaking of the risers that are extended from the BOP assembly when the BOP assembly positioned underwater is moved by the BOP trolley and the BOP assembly is moved to an underwater storage position.

Description

technical field [0001] The present invention relates to a drilling system, which forms a borehole on the seabed surface for surveying stratum structure or exploiting resources, in particular to a drilling system with a groove for holding a blowout preventer assembly in water, wherein, in addition to forming In addition to the drilling operation device (activity), it also includes a trolley and a slot for the blowout preventer (BOP) assembly, which can be combined with the blowout preventer required for drilling operations in advance Assembling, storing and moving equipment for drilling similar to the body, so that when it is necessary to move a short distance for additional drilling operations or for other purposes, it is not necessary to place the blowout preventer assembly in the water inside the hull, but It is to move the hull while keeping it underwater. Background technique [0002] In order to survey or exploit seabed resources, drill holes are formed on the seabed s...

AI Technical Summary

Problems solved by technology

[0010] However, the above-mentioned existing drilling system is a single operating device type including one operating device on the derrick, so there is a problem that either the drilling operation or the assembly and setting operation of the casing or the assembly and setting operation of the standpipe No other operations can be performed at the same time during the process by operating the device

If the blowout preventer assembly (blowout preventer + standpipe) separated from the borehole is placed in the operating device, other operations cannot be performed, so the separated blowout preventer assembly is completely separated and then reassembled for use. So there is a problem of wasting time

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