Schlumberger Technology Corporation

Wellbore Integrity Solutions LLC

Doyle Brinegar

Keith A Moriarty

Michael H Du

Ke Ken Li

Fei Song

Rakesh Singh

Stephen Ray Stafford

Alan W Lockstedt

Wenhui Jiang

Anthony Louis William Collins

Anthony Louis Williams Collins

Fengxiao Liu

A device for cold rolling a thread on a tubular support member of a rotary shouldered thread connection includes obtaining an original root depth of a thread root, cold rolling the thread until a minimum increased root depth tolerance is achieved.

Cold rolling devices and cold rolled rotary shouldered connection threads

A heavy weight drill pipe may include a tube body formed of AISI 1340 alloy steel, and first and second tool joints at respective ends of the tube body, and which are formed of an AISI 41XX series alloy steel. The first and second tool joints may be welded to the tube body at a weld line within a weld region. A Charpy impact toughness at the weld line or surrounding weld region may be least 12 ft-lbs. (16.5 N-m). Yield and tensile strengths at the weld line or weld region may be at least 65 ksi (448.0 MPa) and at least 106 ksi (731.0 MPa), respectively. Material properties at the weld line or weld region may be achieved by heat treating after welding. Heat treating may include austenitizing, quenching, and tempering the weld line and/or the surrounding weld region.

Heat treated heavy weight drill pipe

A method of cold rolling a thread on a tubular support member of a rotary shouldered thread connection includes obtaining an original root depth of a thread root, cold rolling the thread until a minimum increased root depth tolerance is achieved. The thread may be cold rolled with a wheel tip having an elliptical profile.

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Conroe, TX, United States of America

Doyle Brinegar