Abstract: A torque transfer system includes a drive shaft threaded into a housing. The drive shaft includes shaft splines. The housing includes housing splines. A sleeve includes inner splines and outer splines. The inner splines are configured to interlock with the shaft splines and the outer splines are configured to interlock with the housing splines.
Abstract: A tubular string comprises a plurality of torque connectors connecting a plurality of tubular members. At least one torque connector of the plurality of torque connectors comprises a pin component threadably connected to the box component. The pin comprises a three torque shoulders corresponding to three surfaces of the box component. In at least one embodiment, a sacrificial material is deposited between one of the torque shoulders and one of the surfaces to provide additional torque capacity to the torque connector. Additional apparatus, methods, and systems are disclosed.
Abstract: A rigid riser system including a rigid riser and one or more fatigue performance enhancers. The rigid riser includes a plurality of rigid metal sections welded together to form a plurality of girth weld joints. The one or more fatigue performance enhancers are positioned over one or more of the plurality of girth weld joints of the rigid riser to enhance the fatigue resistance and/or fatigue life. The body of the fatigue performance enhancer may include a central region and two end regions with the central region having a greater average radial cross-sectional thickness than each of the end regions. Methods of enhancing fatigue performance of the rigid riser and fatigue performance enhancers are also disclosed.
Abstract: Bonding means for use in a pipe connector, the pipe connector comprising two connector elements each arranged for interconnection and connection to a respective pipe, a retaining means for maintaining interconnection of the connector elements and a ring member arranged for capture by a retaining means and biased into contact with both connector elements of the pipe connector, the ring member being formed as a single piece of electrically conductive material so as to provide electrical bonding directly between the two connector elements of the pipe connector.
Abstract: A pipe fitting includes a hollow body and at least one open end for connection to a pipe fitting, the end including internal screw threads. The end includes an integral extension collar which has an inner diameter larger than the screw threads for surrounding unused trailing screw threads of a pipe joined to the fitting and forming an annular gap for holding a sealing compound. The collar has a wall of a comparable thickness to the and an outer diameter larger than the body of the fitting.
Type:
Grant
Filed:
October 22, 2001
Date of Patent:
July 13, 2004
Assignee:
The Hong Kong and China Gas Company Limited