PROCESSING SYSTEM FOR SEA CLUSTER DRILLING Russian patent published in 2020 - IPC E21B7/12 E21B15/02 B63B35/44 

FIELD: soil or rock drilling.

SUBSTANCE: invention relates to deep-sea drilling from sea-going vessels and can be used in cluster prospecting, exploration and production drilling. Technological complex for sea cluster drilling is arranged on ship, made in the form of pontoon module, containing at least two cases, connected by inter-housing rigid structure, which is base for arrangement of drilling equipment. On each of transverse frames there installed is drilling frame arranged on compensators of oscillations. Drilling pits are provided in pontoon housings. In transverse and drilling frames there are wellhead holes above drilling shafts. Well is drilled in two stages – preparatory stage and borehole putting-down stage. At least on one of the drilling frames above the wellhead holes there are drilling units – installation for the preparatory stage of drilling with a drill pipe from pipes with detachable connections and installation for putting-down of borehole with a drill string of flexible continuous pipes. When drilling several wells each of the units can be transferred to another drilling frame arranged on the other transverse frame. At least one of transverse frames accommodates equipment common for all drilling rigs – flushing unit and unit for operation of equipment and tool.

EFFECT: increasing useful time of complex use and providing possibility of deep-sea drilling with improvement of environmental safety.

1 cl, 3 dwg