Triple Activity System for Drilling Operations

摘要

This invention relates to a drilling rig or a drill ship having a first activity centre with a main well, a second activity centre with an auxiliary well and a third activity centre with offline casing and drill pipe stand-building capabilities. The offline casing and drill pipe stand-building facility is a standalone feature and can be located in the forward or aft side of a drilling rig or drill ship depending on the choice of the builder or operator.

主权项

1. A triple activity system provided at a drill floor on a drillship for conducting drilling operations on a seabed beneath the drillship comprising:
a first activity center having a main well and a first top drive assembly for advancing tubular members through the main well to the seabed; a second activity center having an auxiliary well and a second top drive assembly for advancing tubular members through the auxiliary well to the seabed; a third activity center having an offline mouse hole for receiving an upright tubular member and an iron roughneck for making modifications to upright tubular member assemblages received by the offline mouse hole at the third activity center, wherein the modifications to tubular member assemblages are carried out when main drilling activities are conducted at the first activity center and/or when auxiliary drilling activities are conducted at the second activity center; a storage area adjacent the third activity center for receiving and storing modified tubular member assemblages and tubular members; and a first delivery assembly positioned adjacent the storage area, the first activity center, the second activity center and the third activity center for transferring tubular member assemblages or tubular members between the storage area and, the first activity center, the second activity center or the third activity center.