CASE STUDY 3:

Bespoke Subsea Deployment Frame

This brief presented a design challenge to the engineering team at HCS.   The client required the deployment frame to be fixed on the seabed, however, in the event of a situation requiring emergency release, the client did not wish to have to cut the main umbilical hose nor have to retrieve the entire deployment frame structure.

Our Solution

The design solution was to engineer two interlocking frames.

  1. A primary frame, intended to be permanently pinned to the seabed for the duration of project.
  2. A secondary breakaway plate structure, which could easily be disconnected and retrieved in the event of an emergency.

Guidepins, projecting from the primary frame base plate, ensured perfect alignment of the two interlocking structures.   Two hydraulic cylinders locked both frames in perfect position.

To enable separation without cutting the main flying lead, secondary sacrificial hose points were additionally engineered into the design.   Speedy disconnect was enabled by a hydraulic cutter.

Deployment Frame

The Result

This subsea deployment frame was designed and fully manufactured in 10 weeks.  Frame  fully complied with client specifications.  Our innovative approach was acknowledged by client to be a simple,  yet highly practical solution to their industry problem.

  • To accommodate electrical and hydraulic flying leads
  • Water depth 1,000m
  • DNV GL-ST-E273 – R45 Type A
  • Seabed analysis prior to mudmat design
  • 2-piece design – mechanically locked
  • Hydraulic guillotine to be incorporated
  • Anodes to provide corrosion resistance