Differential thread riser coupling for TLP and platform tieback applications

Conference · Sun May 01 04:00:00 EDT 1983 · Proc., Annu. Offshore Technol. Conf.; (United States)

OSTI ID:6730762

Williams, M R; Chen, L Y

This paper presents the design concept and principle of operation for a new threaded riser coupling called a ''Differential Thread Connector'' (DTC). Connector designs are presented for several TLP (tension leg platform) and platform tieback riser applications. The new connectors have several features which make them particularly well suited for subsea riser service: Mechanical interlock (prevents couplings from backing off under reverse torque loads) Non-rotating, gall-resistant, metal-tometal seals High strength and fatigue life Small Outside Diameter Fast running/retrieval time The DTC's performance has been confirmed via extensive finite element analysis and full-scale prototype testing. These new connectors offer several functional advantages and promise high performance/reliability for demanding subsea riser applications. They also promise significant cost benefits through reductions in rig time (faster running and retrieving), elimination of welding costs, and reductions in connector renovation costs.

• Research Organization: FMC Corp., Wellhead Equipment Div.
• OSTI ID: 6730762
• Report Number(s): CONF-830514-
• Conference Information: Journal Name: Proc., Annu. Offshore Technol. Conf.; (United States) Journal Volume: 2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
COMPARATIVE EVALUATIONS
COST BENEFIT ANALYSIS
DESIGN
FINITE ELEMENT METHOD
JOINTS
MARINE RISERS
MECHANICAL PROPERTIES
MOORINGS
NUMERICAL SOLUTION
OFFSHORE PLATFORMS
PERFORMANCE
PERFORMANCE TESTING
PIPES
RELIABILITY
SERVICE LIFE
TESTING
THREADED JOINTS