Technical
Thesaurus oil & gas
J
Jacket
The steel lattice structure
used to support an offshore steel platform.
Jacket platform
A platform constructed
entirely of steel; such platforms are generally kept in position by means of
steel poles driven into the sea-bed.
Jack-up drilling rig
An offshore drilling
structure with tubular or derrick legs that support the deck and hull. When
positioned over the drilling site, the bottoms of the legs rest on the
sea-floor. A jack-up rig is towed or propelled to a location with its legs up.
Once the legs are firmly positioned on the bottom, the deck and hull height are
adjusted and levelled.
Jet bit
A modified drill bit
utilising a hydraulic jet to increase the drilling rate.
Jet gun
An assembly, including a
carrier and shaped charges, that is used in jet perforating.
Jet perforate
To create a hole through
the casing with a shaped charge of high explosives instead of a gun that fires
projectiles. The loaded charges are lowered into the hole to the desired depth.
Once detonated, the charges emit short, penetrating jets of high-velocity gases
that cut holes in the casing and cement and some distance into the formation.
Formation fluids then flow into the well bore through these perforations. See
bullet perforator and gun perforator.
Jets
The nozzles (usually three
in number) in the drill bit through which the drilling mud emerges from the
drill string during drilling operations.
Joint
A single length (about
Joint venture
An investment undertaken by
a consortium, usually with one member acting as operator.
Jpeg/JPG
A jPeg image is similar to
a Bitmap.
Jug hustler
A member of a seismic crew
who operates the geophones.
Junked
When equipment is lost down
a well and cannot be retrieved economically, the well is junked, i.e. plugged
and abandoned.
Junked well
See junked.
Jurassic period
The period of geological
time which began roughly 180 million years ago and ended roughly 130 million
year ago.
Jug hustler
A member of a seismic crew
who operates the geophones.
Junked
When equipment is lost down
a well and cannot be retrieved economically, the well is junked, i.e. plugged
and abandoned.
Junked well
See junked.
Jurassic period
The period of geological
time which began roughly 180 million years ago and ended roughly 130 million
year ago.