Premium Connection

Tubing main seal is a 30° angle taper metal-to-metal seal providing excellent gas tightness even after repeated make-up and break-out. Casing main seal is a low-taper seal (10% taper on diameter) for gas tightness under high-tension loads including heavy string weights.

• Connection strength equals pipe body
• High seal reliability under internal pressure
• Anti-galling design
• Minimum energy loss at make-up

Tubing main seal is a taper metal-to-metal seal (50% taper on diameter) for excellent gas tightness under severe combined loads in deviated or horizontal wells. Casing main seal is a 20° angle taper providing gas tightness under combined loads. Sealing integrity remains constant through repeated make-up and break-out cycles.

• Excellent bending, compression and torsion resistance
• Reliable gas-tightness under any combined load
• Easy make-up and maintenance

Integral connection threaded on plain-end pipe with OD totally flush with the pipe body. Designed for clearance-critical applications: tubing in small sizes, drilling liners and tie-backs in medium sizes, and contingency liners in larger casing diameters.

• Excellent gas-tight sealing
• 100% flush with pipe body — maximum clearance
• Easy make-up and maintenance

External and internal thread machined directly in the pipe without coupling, using internal and external upset. Taper metal-to-metal internal pressure seal rated at 100% of pipe body. External pressure seal created at the torque shoulder. ZC-4 provides both internal and external sealing capability to pipe body performance level.

• Strong anti-galling — extended service life
• Excellent H2S stress corrosion resistance
• Superior sealing performance
• Fast make-up speed
• Thread strength equals pipe body
• High anti-torque, anti-bending and anti-compression

Internal and external upset integral connection using double screw with no interference and multi torque shoulder. 7.5° angle on load flank and 45° angle on stab flank — no radial interference between pin and box thread. Taper metal-to-metal internal pressure seal rated at 100% of pipe body.

• Strong anti-galling
• Excellent H2S stress corrosion resistance
• Double seal — internal and external
• High anti-torque, anti-bending and anti-compression

External and internal thread machined directly in the pipe without coupling using internal and external upset. Taper metal-to-metal internal pressure seal rated at 100% of pipe body. External pressure seal at torque shoulder. Full internal and external sealing to pipe body performance level.

• Strong anti-galling — extended service life
• Excellent H2S stress corrosion resistance
• Superior sealing performance
• High anti-torque, anti-bending and anti-compression