US Patent 7,347,459
Running Standard downhole casing applications
Rotating To aid string advancement
Drilling with Casing / Drilling with Liners
For use in non-abrasive environments
Specialty semi-premium connection machined from heavy-wall coupling stock and forged blanks. Like the GB CDE Connection, both the GB WSE and GB HBE Connection performances exceed that of standard API connections. Connections are designed with refined API BTC Threads and will make up with off-the-shelf API BTC threaded accessories. Innovative, triple taper thread design (box only) reduces localized bearing stresses in critical areas for improved fatigue resistance. Pin noses engage shoulders in the coupling center for positive indication of proper field makeup. Pin noses, designed for maximum bearing face area, provide high torque resistance. GB WSE has an integral, wear sleeve to protect the leading edge and critical areas of the connection that commonly wear during drilling operations. For the most abrasive environments the wear sleeve can be furnished with hard-facing (GB HBE).