6Halse H R, A/S V T. Unitong combine tong for drilling operations [ C ] . Amsterdam : SPFJIADC Drilling Con- ference, 2007.
7Abrahamsen E. Filed experience : first all - in - one ma- chine for making up drillstring, bottomhole assemblies, casing and tubing in the norwegian sector [ C ] . Amster- dam: SPE/IADC Drilling Conference, 2005.
8Gupta S. Rig automation - altering the visage of the oil industry [C ]. Bangkok, Thailand: IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, 2006.
9David, Reid, Varcointernational, Inc. The developme- nt of drilling rigs [ C ] . Dallas: IADC/ SPE Drilling Conference, 1998.