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CRI project management and technical services |
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1. |
Principle of Cutting Re-injection
In order to prevent environment pollution, wasted oil
based mud and cutting with oil produced during the process
of drilling is injected into the qualified formation, which
is a kind of drilling wasted treatment method and also
called CRI.
Cutting is transmitted to coarse tank filled with sea water
by auger system after flowed to shale shaker through mud
ditch. A kind of mixture will come into being while cutting
and sea water is agitating by agitator, which will be
grinded by centrifugal pump. After that cutting slurry will
be transmitted to classification shaker by centrifugal pump
for classifying. The solids which are smaller than the
shaker screen will be transmitted to fine tank while the
bigger ones will be back to coarse tank for further
grinding. The slurry in the fine tank will form a kind of
liquid with certain viscosity after adding viscosifying
agent and then will be injected into pre-set formation by
high pressure pump. This is the brief flow chart of CRI.
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2. |
Project & Technical Feasibility Studies |
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3.Geological formation evaluations |
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4.CRI designing
and formation selection
a.Cutting re-injection via annular of existing
producer
b.Cutting re-injection via annular of existing producer
c.Cutting re-injection via annular, drilling and CRI
operation running synchronously.
d.Cutting re-injection via tubing of exiting abandoned
well
e.Cutting re-injection via tubing of the specified
Cutting re-injection well |
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