D
ownhole tools are sensitive pieces of equipment
that must withstand a punishing work environment
and operate reliably. Measurement-while-drilling
(MWD) and logging-while-drilling (LWD) tools are subject
to temperatures ranging from 250˚F to 400˚F and shock
vibrations up to 500 g. The shock and vibration from axial
excitation tools can also have a negative effect on MWD and
LWD tools. Due to these less-than-ideal conditions, the oil
and gas industry is looking for solutions that can mitigate
shock and vibration effects, while increasing the reliability
and life expectancy of downhole tools.
Downhole tools operate in a gruelling environment.
Between the excessive heat and the ever- increasing
dynamic excitations, the sensitive electronics in the
directional bottomhole assemblies (BHA) are being
pushed to the edge of their operating envelope. This
leads to a shorter life expectancy for the tools, along with
undependable measurement readings and expensive
downtime for repair.
MWD and LWD tools contain electronic boards and
sensors that take measurements for position, temperature,
pressure, and formation, and send this information back
to the surface. Accurate readings from these devices are
critical to the safety and productivity of drilling operations.
ADAM KEITHLY,
LORD CORPORATION,
USA,
REVEALS
HOW DOWNHOLE
TOOL PROBLEMS
CAN BE SOLVED
WITH AEROSPACE
TECHNOLOGY.
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