TERMIUM Plus®

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POSITION-REFERENCE SYSTEM [3 records]

Record 1 2001-01-17

English

Subject field(s)
  • Acoustics (Physics)
  • Range Measurements (Telecommunications)
  • Equipment (Oil and Natural Gas Extraction)
DEF

A system consisting of a beacon positioned on the seafloor to transmit an acoustic signal; a set of three or four hydrophones mounted on the hull of a floating offshore drilling vessel to receive the signal, and a position display unit to track the relative positions of the rig and the drill site.

OBS

Monitoring of the display unit ensures accurate positioning of the rig over the site.

Key term(s)
  • acoustic position-reference system

French

Domaine(s)
  • Acoustique (Physique)
  • Mesures à distance (Télécommunications)
  • Outillage (Extraction du pétrole et du gaz)
CONT

Le système de localisation acoustique avec une base de mesure implantée à bord (base courte) comporte quatre hydrophones en surface et une seule balise émettrice immergée.

Spanish

Save record 1

Record 2 2000-07-12

English

Subject field(s)
  • Range Measurements (Telecommunications)
  • Maneuvering of Ships
  • Equipment (Oil and Natural Gas Extraction)
DEF

A system for monitoring the position of a floating, offshore drilling rig in relation to the subsea wellhead in which a taut, steel line is stretched from the rig to the ocean floor.

OBS

An inclinometer measures the slope of the line at the rig, and, because the line is assumed to be straight from the rig to the ocean floor, any slope in the line indicates that the rig has moved.

French

Domaine(s)
  • Mesures à distance (Télécommunications)
  • Manœuvre des navires
  • Outillage (Extraction du pétrole et du gaz)

Spanish

Save record 2

Record 3 2000-05-10

English

Subject field(s)
  • Range Measurements (Telecommunications)
  • River and Sea Navigation
  • Equipment (Oil and Natural Gas Extraction)
DEF

Any system or method by which surveillance is maintained on the position of a floating offshore drilling rig in relation to the subsea wellhead.

OBS

Ideally, the rig should always be directly over the wellhead ...to minimize wear on subsea equipment and facilitate the many operations involved with the equipment.

French

Domaine(s)
  • Mesures à distance (Télécommunications)
  • Navigation fluviale et maritime
  • Outillage (Extraction du pétrole et du gaz)

Spanish

Save record 3

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