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.
