Subsea Detailed Services

LoneStar Deepwater provides subsea project management leads across a broad range of technical disciplines.  Areas of expertise include subsea flowlines, risers, umbilicals, controls systems, manifolds, subsea hardware, fabrication quality oversight, installation management, system testing, pre-commissioning and commissioning.  Discipline leads also provide technical oversight of detailed engineering and design teams.  The experience and commitment to excellence of our personnel adds value to client projects and helps to ensure projects are executed safely and efficiently.

Services include:

  • Installation Engineering and Offshore Supervision
  • Develop Testing Procedures for Hardware/Quality Surveillance
  • Flowline/Pipeline Design Codes and Fabrication Methods
  • Design Aspects Required for Seabed Structures
  • Host Selection
  • Riser Selection and Engineering
  • Flexible Riser/Umbilical Engineering and Fabrication
  • Materials and Welding Engineering
  • Field Architecture and Layout
  • Flow Assurance

Technical Oversight

  • Pre-FEED – Concept selection
  • FEED – feasibility studies, cost estimates, option development, budget development, interface with flow assurance, subsea, and drilling/completions personnel
  • Functional Specification Preparation
  • Detailed Design Oversight
  • HAZOP/HAZID Participation
  • Safety Case Participation
  • FAT/SIT Witness
  • Commissioning and start-up procedure development

Fabrication/Construction Inspection

  • QA/QC Inspection
  • Progress Reporting
  • Subsea equipment fabrication
  • Equipment FAT’s/SIT’s
  • Pipe spooling operations
  • Subsea equipment installation
  • Pipeline installation

Installation Commissioning & Start-Up

  • Early input to system design
  • Onsite Client Representation
  • Subsea equipment fabrication
  • Procedure development and implementation
  • Pumping services contractor management