An area subdivision of the UKCS of 10 minutes of latitude by 12 minutes of longitude measuring approximately 10 x 20 kms, forming part of a quadrant. Each quadrant is divided into a grid five blocks wide and six deep, and numbered 1 to 30 from NW to SE (e.g. Block 9/13 is the 13th block in Quadrant 9).
The fine screenings from crushed coke. One of the 2 main types of rudaceous rocks, consisting of angular fragments implying minimum transport of material.
A mobile submersible drilling structure constructed of several steel cylinders, or bottles. When the bottles are flooded, the rig submerges and rests on the bottom; when water is removed from the bottles, the rig floats. Suitable for shallow drilling of about 30 m
See drilling rig
A contract with diverse owners of separately leased oil and gas tracts that enables an oil company to drill one or two test wells instead of one well per tract
To unscrew drillstrings or other components which are coupled by various thread forms known as connections, including tool joints and other threaded connections
LNG that evaporates during storage and transport. Typically, any rise in temperature of LNG during storage and transport will be countered by allowing evaporated LNG to vent from storage tank. Boil off gas is sometimes used to supplement fuel for tankers, or as a fuel at storage facilities
Capacity bought by a shipper
