REAMING TOOL

摘要

A reaming tool (10) comprises a body (16) coupled to the leading end of a tubular component, such as a casing or liner string (12). The tool further comprises a shaft (22) mounted within the body (16) and the body (16) and the shaft (22) together define a rotary drive arrangement (32). A rotary seal (34) is provided between the body (16) and the shaft (22), the seal (34) adapted to permit relative rotation between the body (16) and the shaft (22) while substantially preventing fluid leakage therebetween. The tool (10) comprises a fluid conduit (40) arranged to direct fluid through the rotary drive arrangement (32) to drive rotation of the body (16) relative to the shaft (22) to facilitate reaming of the casing or liner string (12).