SRP’s hydraulically actuated riser spider has been used to successfully deploy, retrieve and hang-off risers during one year storms in the North Sea.

The spider is a low profile sliding plate design to give maximum operator visibility and has been designed and tested in accordance with API Spec 7K. All features are remotely controlled on the HPU and control panel, including separate actuation and position locking functions, which give clear visual feedback.

The base design fits into the master bushing shoulder in a 49.5” rotary table and retains the full through bore of the rotary. Adapters to larger 60” rotary tables are available and we can also scale up the design for larger pass through diameters.

The spider is split along the centre to allow removal / installation around a riser joint positioned through the rotary.

The spider is supplied complete with a free standing combined hydraulic power pack and control panel, which features all 316L hydraulic components and an ATEX zone 1 rated air motor.

As an option, the spider can be supplied with alignment gates, which act as an automatic stabbing guide.

Applications

  • Deployment and retrieval of risers (particularly drilling risers) from any offshore vessel

Advantages

  • Safe and field proven design: low profile for maximum visibility, non-slip access surfaces, clearly visible locking pins, and 5 year field history in the North Sea.
  • Robust and flexible design: adaptable to a range of rotary tables with interchangeable key plates; the spider is dual qualified design and manufacture to API Spec 7K and API Spec 8C (13535) to 300t SWL (higher load ratings available).