Our client was scheduled to drill a platform well using a jack-up rig in the Timor Sea, in addition they also needed to re-enter a nearby subsea well. A separate semi-sub rig would traditionally be contracted, as semi-sub rigs are associated with subsea wells. However, our client wondered if it would be possible to utilise a jack-up rig already under contract on a nearby operation. If this was possible, it would mean significant cost savings for their project as a result of not needing to contract a secondary rig.

Major operations on subsea wells in the Timor Sea are typically performed using a semi-sub rig. However, using a semi-sub in shallower waters can often be challenging for operators when trying to keep project costs down, as operating windows are limited to smaller wave heights only and fatigue damage of subsea equipment is typically higher. We investigated whether our client could use the jack-up rig already under contract for operations over a platform to re-enter a nearby subsea well.


The riser analysis service we provide validates and optimises conductor or riser system design making you aware of any performance improvements and also allowing international regulations and requirements to be met. Specialising in a range of conductor and riser analysis services, including but not limited to, jack-up high-pressure riser analysisplatform well conductor analysis and tieback analysis. Our highly qualified and experienced team will provide in-depth analysis which highlights specific project needs while also building bespoke models replicating situations in offshore environments, therefore meeting the individual operational requirements of our customers.

Using riser analysis against semi-submersible or drill ships boasts many benefits, including the ability to reduce any unnecessary costs. While also providing valuable insight into the operations of using a floating vessel when subjected to global dynamic loads.