Wellbore completion

摘要

A completion system (10) comprises tubular components (22) coupled together to form a completion string (24). In-flow control devices (34) are provided to permit selective fluid communication between an internal bore (26) of the completion string (24) and the annulus (28). A reaming tool (38) is provided at a leading end of the completion string (24) and the reaming tool (38) is run into the borehole (12) with the completion string (24). The reaming tool (38) comprises a fluid-powered drive unit (40), a reaming body (42) and a reaming nose (43). In use, the string (24) is located in the borehole (12) and fluid is directed to the reaming tool (38) to facilitate reaming of the borehole (12). A second tubular in the form of a washpipe (44) extends through the internal bore (26) of the completion string (24) for providing fluid to the reaming tool (38). The reaming tool (38) is operable at a fluid pressure below a pressure which would activate the in-flow control devices (34).