Traditionally, High Pressure High Temperature (HPHT) wells are drilled using a Semi-submersible Drilling vessel with a Subsea BOP. However, recently Oil Companies have started optimising the drilling programmes and exploring more cost effective methods of drilling HPHT wells. One such shallow water method involves drilling from a Jack-Up with a Surface BOP and HPHT Riser String. This method saves the operator the price difference of using a Jack-Up over a Semi submersible.

In 2009 SRP delivered the world’s first API NACE compliant full-bore Ultra HP Shrink-Fit drilling riser capable of working at pressures in excess of 12,200psi, adding another dimension to its HPHT Riser catalogue which also includes welded full-bore HPHT risers capable of pressure up to 10,000psi.

Deepwater applications of the Ultra High Pressure technology are currently being proved by using the Shrink-Fit technique on 125ksi pipe which will allow drilling from a Spar over the use of a separate Drillship.

Shrink-Fit also enables new applications of Steel, Titanium and Carbon material selection on Production Risers and Completion and Work-Over Risers.

In summary, Subsea Riser Products (SRP) has a range of specialist flange couplings, designed to provide long term structural integrity and sealing in extreme load and pressure applications without compromising speed of assembly. Our HPHT systems can be either welded solutions or our proprietary SHRINK-FIT™ technology.