CHAPTER 2 PART 2 Flashcards
The mechanical device suspending
the drillstring’s weight;
Swivel
Long square or hexagonal steel bar with
a fluid path drilled through the center;
Kelly
Short drill collar with male threads
on one end and female on the other;
Kelly Saver Sub
Revolving or spinning section
of the drillfloor that provides
power to turn the drillstring in a
clockwise direction (as viewed
from above);
Rotary Table
Adapter connecting the rotary table
to the kelly;
Kelly Bushing
Device used to grip the
drillstring and suspend it in the
rotary table when making or
breaking a connection;
Slips
are the active
tongs during breakout (or
loosening) operations;
Tongs
are active
during makeup (or tightening)
operations.
Makeup tongs
A drillstring turning device;
Consists of one or more
motors (electric or hydraulic)
connected with appropriate
gearing to a short section of
pipe called a quill, that in turn
may be screwed into a saver
sub or the drillstring itself;
Top Drive or Power Swivel
The formation pressure is defined as the
pressure at which a fluid or gas exists in the pores of a permeable
rock. This is also called pore pressure.
Formation Pressure
The amount of pressure a formation can
withstand before the formation breaks down as a fracture is
initiated, followed by loss of fluid, also defined as Formation
breakdown pressure.
Fracture Pressure
The amount of pressure the formation can
withstand before the formation accepts any fluids.
Leak-Off Pressure
A combination of one or more Well
Barrier Elements that together constitute a method of containment
of fluids within a well that prevents uncontrolled flow of fluids into
another formation, or, to escape at surface.
Well Barrier Envelope
is achieved by ensuring that the mud
hydrostatic pressure overcomes formation pore pressures.
To maintain primary well control, the well should always be filled
with mud with a density within the mud window.
Primary Well Control
is achieved by using valves to prevent
the flow of fluid from the well until such time as the well can be
made safe.
Secondary Well Control
