The mud mix is a
specialist brew designed
to match the desired flow
viscosity, lubrication
properties and specific
gravity. Mud is a common
name used for all kinds of
fluids used in drilling
completion and workover,
It can be Oil Base, Water
Base or Synthetic and
consists of powdered clays
such as bentonite, Oil,
Water and various
additives and chemicals such as caustic soda, barite (sulphurous mineral), lignite
(brown coal), polymers and emulsifiers. Photo: OSHA.gov
A special high density mud called Kill Fluid is used to shut down a well for
workover.
Mud is recirculated. The coarse rock shales are separated in a shale shaker, the mud
could then pass though finer filters and recalibrated with new additives before
returning to the mud holding tanks
3.4 The Well
When the well
has been drilled,
it must be
completed.
Completing a
well consists of a
number of steps;
installing the well
casing,
completing the
well, installing
the wellhead, and
installing lifting
equipment or
treating the
formation should
that be required.