Drill pipes that are used in
applications such as DTH/
DTHR/ DR basically comprise of
a steel tube with a pin at one
end and a box on the other. The job of the drill pipe is to
transmit rotational torque and
thrust from the drill rig rotary
head to down hole drilling
tools. Also used to transport
the drilling fluid to the down
hole tools and facilitate removal
of cutting through annulus.
An effective drill pipe has to be
designed to support its own
weight for combined lengths
that could be more than 2000
feet down into the crust of the
Earth. Connections must be
durable to resist wear from
repeated use. Each length of
pipe must be sufficiently rigid
enough not to break or
become permanently bent. Most importantly, drill pipes
must be capable of
withstanding tremendous
forces generated during the
drilling and pullback.
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