US 11,898,666 B1
High torque threaded connections with triple taper thread profiles
Oladele Owoeye, Dhahran (SA); and Jasem Moyaibed, Tarut (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Aug. 5, 2022, as Appl. No. 17/817,864.
Int. Cl. F16L 15/06 (2006.01); F16L 15/00 (2006.01)
CPC F16L 15/06 (2013.01) [F16L 15/002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A threaded connection, comprising:
a first tubular member having a pin end defining an external thread profile; and
a second tubular member having a box end defining an internal thread profile threadably engageable with the external thread profile of the pin end, wherein at least one of the external and internal thread profiles includes:
a first section that extends at a first taper angle relative to a longitudinal axis of the threaded connection and exhibits a first thread pitch;
a second section extending from the first section at a second taper angle relative to the longitudinal axis and exhibits a second thread pitch; and
a third section extending from the second section at a third taper angle relative to the longitudinal axis and exhibits a third thread pitch, wherein the second taper angle is greater than each of the first and third taper angles.