Case Study: Hess Equatorial Guinea Sendje Ceiba FPSO – Phase 1 and 2

Location: Offshore, Equatorial Guinea

Following an unsuccessful attempt by another contractor to remove 200 tonnes of Oil Based Mud waste using high volume pump technology, Sureclean were approached by the client to devise an efficient and effective safe system of work, utilising the latest pumping technology. Following this approach, Sureclean carried out extensive trails, witnessed by the client whilst replicating the conveying of materials up to 100m horizontally and 60m vertically utilising hydraulically driven screw pumps. On successful completion of these trials, we were subsequently awarded the contract to undertake these works.

Sureclean Scope

Primary scope of work was to provide the necessary manpower and equipment for the removal of all Oil Based Mud waste from the cargo storage tank onboard the FPSO to allow inspection and remedial repairs.

Technical Challenge

  • Logistics associated with resourcing, planning and managing project growth, within a critical path
  • Extensive factory testing (trials) was undertaken to replicate the technical challenges involved in the project, prior to deployment
  • 4 man team was assigned to undertake the project
  • Equipment and consumable resources were required to be mobilised across international waters within critical timeline

Hess Equatorial Guinea Sendje Ceiba FPSO – Crane Hess Equatorial Guinea Sendje Ceiba FPSO – Ship Hess Equatorial Guinea Sendje Ceiba FPSO – Ship Containers


  • Timeline - Critical Path Project
  • Project Management, resourcing, planning and scheduling, conflicting activities
  • Hazardous Environment – Vessel Entry Working, access and egress
  • Magnitude of scope of work – Over 200 tonnes of Oil Based Mud Waste with a specific gravity >2 was required to be removed from cargo tank
  • The distance and height over which the waste had to be moved
  • Hazardous Waste – Removal of Chemicals Hazardous to Health
  • Waste containment and vacuum transfer – Waste disposed of via client incumbent waste contractor

Key Facts

  • Project completed over 3 separate phases, phase 1 was factory testing (trials), phase 2 and phase 3 removal operations onboard the FPSO
  • Removal operations split into 2 x separate phases due to operational requirements of FPSO
  • All work scopes completed without safety or environmental incident.
  • Project completed on time
  • Over 200 tonnes of Oil Based Mud with a >SG2 was removed using vacuum transfer and pumping technology and disposed off via licensed waste contractor