Trade.Information

Product Name: High Pressure High Temperature (HPHT) Risers

Product Description

Claxton, along with Acteon group sister companies, 2H Offshore and SRP, have developed a unique and award-winning High-Pressure High-Temperature (HPHT) riser.

The award-winning design uses a shrink-fit flange to negate many of the issues inherent in working with HPHT-grade riser materials. This new technology enables HPHT wells to be drilled from a standard Jack Up.

Features:

• The world’s first API NACE compliant full-bore (18 ¾”) access riser capable of working at pressures in excess of 12,000psi
• The world’s first attachment of flanges to a riser by shrink fit process
• Allows high pressure wells to be drilled by a standard jack-up rig with a surface BOP, avoiding the need for a floating vessel with subsea BOP

Shrink Fit Flange:

• Based on well established physical principles.
• Contact friction and machined profile give load capacity.
• Mechanical back-up with capacity greater than pipe.
• The seal mechanism is enhanced as the riser internal pressure increases.
• Shrink fit gives excellent fatigue performance – no weld and low stress concentration

Shrink Fitting:

• Induction coils are wrapped around the flange which is then insulated.
• Flange heated up using induction coils.
• Cold pipe is then inserted in the flange in a carefully controlled operation.