Extended Operational and Trade Vocabulary
Offshore Oil and Gas Marine Operations glossary (page 2)
The marine operations supporting offshore oil and gas: anchor-handling and supply vessels (AHTS, AHV), accommodation flotels, active heave compensation for subsea lifts, air gap clearance, and the station-keeping and lifting systems that serve MODUs and floating production units. Grounds each term in the offshore field operation it supports.
275 defined terms.
Showing 25 on this page (page 2 of 2).
U
- UKCS
- United Kingdom Continental Shelf.
- Umbilical
- Composite hose/cable bundle (electric, hydraulic, chemical, fiber).
- Underdeck Clearance
- See Air Gap.
- Unmanned Wellhead Platform
- Normally unattended installation, NUI.
- Upper Stack (LMRP)
- Top half of BOP with annulars; disconnectable.
- Utility Vessel
- Small offshore work boat.
V
- VIV Suppression Strakes
- Helical fairings on risers reducing VIV.
- VOC
- Dutch East India Company, chartered 1602.
- Voith Schneider
- Cycloidal propeller for tugs and ferries.
- Vortex Induced Vibration (VIV)
- Cyclic riser/pipeline motion from cross-flow.
W
- Walk-to-Work (W2W)
- Personnel transfer via motion-compensated gangway between vessel and platform.
- Well-stimulation vessel
- Offshore vessel for well stimulation.
- Wellhead
- Pressure-containing equipment at top of wellbore.
- Wet Tow
- Towing a floating structure by wet draft.
- Winterization
- Cold climate protection for offshore equipment.
- Wireline
- Slickline or electric line operations through tree.
- Workover
- Repair or upgrade intervention on a producing well.
- WROV
- Work-class ROV with manipulators and tooling.
- WTIV
- Wind turbine installation vessel; jack-up class for offshore wind.
X
- Xmas Tree
- Common abbreviation for Christmas tree.
Y
- Yard Stay
- Period vessel/rig spends at shipyard for maintenance or modification.
- Yoke Mooring
- Rigid arm between FSO/FPSO and fixed tower mooring.
Z
- Zero Discharge
- Operational standard prohibiting discharges of certain wastes.
- Zone 1/Zone 2
- Hazardous area classifications under IEC 60079 for offshore.
- ZPMC
- Shanghai-based fabricator of jack-ups and crane vessels.