Preparing For Your Offshore Oil Jobs Interview - What Happens on Oil
So, you want to get hired for jobs on oil rigs? Then you had better find
out what happens on an oil rig, hadn't you? First off, you could say that
an oil rig's life can be divided into 4 different phases:
Drilling - a hole (5 inches to 36 inches) is drilled into the earth.
During this process, drilling fluid (also known as mud) is pumped in to
help cool down the drill bit and remove the rock cuttings. After this,
steel tubes are inserted into the hole to provide structural integrity.
These pipes are 30 feet long, and also help to isolate potentially
dangerous high pressure zones from each other and from the surface.
Completion - this is just a fancy name for getting the oil rig ready to
pump oil. The deepest sections of steel tubes are perforated so that oil
can flow from the reservoir. An additional set of tubes is added to
provide redundancy, allowing oil to flow from the reservoir to the
surface for collection. In older oil fields, there may not be enough
pressure underground to pipe the oil to the surface. In this case,
additional pumps are installed. Using these pumps is called "secondary
Production - this is what you have been waiting for. The well is
connected by the pipeline to the refinery, and the oil is finally allowed
to flow. Sometimes, additional systems called "tertiary recovery" are
installed to get more oil out of the ground. Maintenance is also
performed on the oil well, including replacing the steel tubes and pumps
Abandonment - the rig no longer produces enough oil to make a profit.
Cement is pumped into the hole, and then capped and buried.
When you are new and inexperienced, you will probably only be involved in
the production phase. You are unlikely to be called on to work in the
drilling and completion phases.
Most wells are dug to produce oil. However, many oil rigs also produce
gas as a byproduct. In the past, this gas is usually just burned off.
Nowadays, oil companies are more ingenious in dealing with this gas. In
the US, this gas is often piped to end-users. If there is no market for
natural gas near the oil rigs, the gas may be collected and converted to
synthetic gasoline, diesel or jet fuel . This natural gas could also be
injected back into the reservoir, to extend the life of the oil well.
Both onshore and offshore oil rigs share the same life cycle. The
difference is that offshore rigs have to be more robust, and have to be
built on water. This results in more complicated logistics and a higher
cost. Many offshore oil rigs are still relatively near land, and rig crew
are commonly transported by helicopter, e.g. oil rigs around the US Gulf
coast. For oil rigs in the deep ocean, the rig crew have to be
transported by ship. Ship journeys take longer, so workers on offshore
oil rig rigs have to work for longer stretches, maybe 4 or 6 weeks
instead of 2 weeks.
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can help you to quickly and easily find jobs on oil rigs.