Technical Thesaurus oil & gas
Letter 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.
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