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Project profile: 5,000PSI 24" OD drilling riser system supply

DRILLING RISER SCOPE OF SUPPLY

  • 7x 42ft intermediate riser joints with optimised flanges
  • Stress, tension and pup (space out) joints
  • Riser Spider
  • Riser Handling Tools
  • Bolt Tensioning Equipment
  • 300Te Claxton proprietary Positive Grip Tension Ring
  • ExF H4 subsea wellhead connector
  • H4 connector storage skid and HPU / control system
  • Gasket and bolt handling, storage and make-up equipment
  • Umbilicals, tooling  and ancillaries
  • Interface engineering and running procedure development
  • Offshore personnel

TIME-SAVING THROUGH DRILLING RISER RUNNING

Claxton provided the riser with all required tooling, equipment and personnel. We worked closely with our client and the rig-owner to develop a running procedure that enabled Talisman to ‘jump’ the riser stack from well-to-well – resulting in significant running time savings for the client.

For this project, Talisman had specific requirements for running and handling the riser, so Claxton supplied a number of new tools, including a gasket handling tool which negated the need to manually insert gaskets into the riser flanges during make-up.

gasket tool (middle) and our hydraulic riser handling tools (right) – these complement ring-type bolt-torquing equipment

Safety and running time optimisation: Proprietary Claxton tooling was used to deliver handling benefits –including a gasket tool (middle) and our hydraulic riser handling tools (right) – these complement ring-type bolt-torquing equipment to reduce manual handling and improve running times.

Further operational enhancements were realised thanks to our close links with our sister companies in the Acteon group. For instance, we supplied ‘optimised’ SRP flanges with a reduced number of bolts in the flange without compromising performance and coupled this with ‘ring-type’ bolt tensioners which mechanically make up all the bolts in a flange in a single pass.

The project was completed with no LTI’s or equipment failures and is just one example of the excellent safety record Claxton enjoys for complex riser operations.

Claxton-supplied H4 connector, complete with 2-arm guide frame and ROV control panel, hanging in the moonpool.

The right connections: Claxton-supplied H4 connector, complete with 2-arm guide frame and ROV control panel, hanging in the moonpool.

THINKING ABOUT YOUR RISER REQUIREMENTS?

Claxton’s riser engineers have been supplying risers since the early 1990s and we’ve been responsible for over 190 riser projects since 2005 alone.

Learn more about how we can make your next project happen by downloading our riser case study pack.

Risers & tensioning case study pack
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Drilling Riser and Tensioning Case Study Pack

Download the Claxton drilling riser and tensioning case study pack to discover how we have saved clients time and money through innovation.

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Lifecycle stage
Drilling