Patent ID: 6595288
Filing Date: 2003-07-22
Classification: B23P,E21B,Y10T

Abstract:
A torque sub assembly for attachment to a fill-up and circulation tool for rotating a casing string within a wellbore during a process of inserting said casing string within said wellbore, said casing string being comprised of a plurality of casing tubulars for interconnection and insertion into said wellbore, said fill-up and circulation tool comprising a tubular member with a flexible seal thereon insertable into said plurality of casing tubulars for sealing contact with an interior of said casing tubulars, the torque sub comprising:a top sub portion; a lower sub portion connected to said top sub portion; and an adapter which, in use, engages directly with a selected one of said plurality of casing tubulars for applying torque to said selected one of said casing tubulars through said top sub portion.