High-torque drill pipe connector resists downhole makeup

Journal Article · Mon May 21 04:00:00 EDT 1984 · Oil Gas J.; (United States)

OSTI ID:6572139

Smith, J E

Torsional failures are the most frequent failure mode of tool joints. Most failures are caused by downhole make-up due to excessive torque. To combat this problem, a high torque connector has been developed that is capable of transmitting 40% more torque than a conventional tool joint of the same nominal size. The high torque connector utilizes a secondary shoulder on the nose of the pin and a mating shoulder in the box. When the connector is tightened to the recommended make-up torque, the secondary shoulders do not contact. If an over-torque situation is encountered and further tightening, or downhole make-up occurs, the secondary shoulders will make contact and retard additional make-up. This provides the increase in the connector's torque capacity.

• Research Organization: Hughes Tool Co. Houston TX
• OSTI ID: 6572139
• Journal Information: Oil Gas J.; (United States), Journal Name: Oil Gas J.; (United States) Vol. 82:21; ISSN OIGJA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FABRICATION
FAILURES
FASTENING
JOINING
JOINTS
PIPES
SIZE
TOOLS
TORQUE