Casing and Tubing
API Buttress thread
■OD and ID are 100% Flush
■Designed for medium or heavy wall casing
Buttress threads form with a taper of 1:16 and a lead of 5TPI, which can be measured by API gauge,more applicable for medium or heavy wall pipes. Pipe to pipe are connected without coupling.
Metal-to-Metal seal surface provides enough contact length and contact pressure. The Metal-to-Metal seal system offers excellent gas-tight sealing, even under the most severe combined loads. The seal integrity remains constant after repeated make-ups and break-outs. Optimized thread geometry minimizes the risk of galling, even when thread compounds are poorly applied.
A reverse angle torque shoulder provides accurate power-tight make-up, which also enhances Metal-to-Metal sealing.
The OD and ID are 100% flush, which gives the maximum clearance.
Low Stress Design
The lower stress design makes the connections reliable in corrosive conditions.