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Drill - Site Preparation
Once the drill site has been
selected and surveyed, a contractor or contractors will move
in with equipment to prepare the location. If necessary, the
site will be cleared and leveled. A large pit will be constructed
to contain water for drilling operations and for the disposal
of drill cuttings and other waste. A small drilling rig, referred
to as a dry hole differ, will be used to start the main hole.
A large diameter hole will be drilled to a shallow depth and
lined with conductor pipe. Sometimes a large, rectangular cellar
is excavated around the main bore hole and ined with wood. A
smaller diameter hole called a "rat hole" is drilled
near the main bore hole. The rat hole is lined with pipe and
is used for the temporay storage of a piece of erilling equipment
called the "kelly>" When all of this work has been
completed, the drilling contractor will move in with the large
drilling rig and all the equipment required for the drilling
of the well.
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