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Rig components part(1)

 Accumulator
The storage device for nitrogen pressurized
hydraulic fluid, which is used in operating the
blowout preventers. 

Annular Blowout Preventer
 A large valve, usually installed above the ram preventers,
that forms a seal in the annular space between the pipe
and well bore. If no pipe is present, it forms a seal on the
well bore itself. 

Annulus
The space around a pipe in a well bore, the outer wall of
which may be the wall of either the bore hole or the
casing; sometimes termed the annular space.

Blowout Preventer

A large valve, usually installed above the ram preventers,
that forms a seal in the annular space between the pipe
and well bore or, if no pipe is present, on the well bore
itself.

Brake

The braking device on the drawworks to stop a load being
lifted.

Bulk Mud Components in Storage

Hopper type tanks for storage of drilling fluid components.

Casing Head

A heavy, flanged steel fitting connected to the first string
of casing. It provides a housing for slips and packing
assemblies, allows suspension of intermediate and
production strings of casing, and supplies the means for
the annulus to be sealed off. Also called a spool.

Cathead

A spool-shaped attachment on a winch around which rope
for hoisting and pulling is wound.

Catline Boom and Hoist Line

A structural framework erected near the top of the derrick
for lifting material.

Catwalk

The ramp at the side of the drilling rig where pipe is laid to
be lifted to the derrick floor by the catline or by an air
hoist. 

Cellar

A pit in the ground to provide additional height between
the rig floor and the well head to accommodate the
installation of blowout preventers, ratholes, mouseholes,
and so forth. It also collects drainage water and other
fluids for disposal.

Choke Manifold

The arrangement of piping and special valves, called
chokes, through which drilling mud is circulated when the
blowout preventers are closed to control the pressures
encountered during a kick.

Conductor Pipe

The largest diameter casing and the topmost length of
casing. It is relatively short and encases the topmost
string of casing. 
Crown Block and Water Table

An assembly of sheaves or pulleys mounted on beams at
the top of the derrick. The drilling line is run over the
sheaves down to the hoisting drum.
Degasser

The equipment used to remove unwanted gas from a
liquid, especially from drilling fluid.

Desander

A centrifugal device for removing sand from drilling fluid to
prevent abrasion of the pumps. It may be operated
mechanically or by a fast -moving stream of fluid inside a
special cone-shaped vessel, in which case it is sometimes
called a hydrocyclone.

Desilter

A centrifugal device, similar to a desander, used to remove
very fine particles, or silt, from drilling fluid. This keeps
the amount of solids in the fluid to the lowest possible
level.

Doghouse

A small enclosure on the rig floor used as an office for the
driller or as a storehouse for small objects. Also, any small
building used as an office or for storage.


Drawworks

The hoisting mechanism on a drilling rig. It is essentially a
large winch that spools off or takes in the drilling line and
thus raises or lowers the drill stem and bit.


Drill Bit

The cutting or boring element used in drilling oil and gas
wells. Most bits used in rotary drilling are roller-cone bits.
The bit consists of the cutting elements and the circulating
element. The circulating element permits the passage of
drilling fluid and uses the hydraulic force of the fluid
stream to improve drilling rates. 

Drill Collar

A heavy, thick-walled tube, usually steel, used between
the drill pipe and the bit in the drill stem. It is used to put
weight on the bit so that the bit can drill.


Drill Pipe

The heavy seamless tubing used to rotate the bit and
circulate the drilling fluid. Joints of pipe 30 feet long are
coupled together with tool joints.



Driller's Console

The control panel, located on the platform, where the
driller controls drilling operations.


Drilling Line

A wire rope hoisting line, reeved on sheaves of the crown
block and traveling block (in effect a block and tackle). Its
primary purpose is to hoist or lower drill pipe or casing
from or into a well. Also, a wire rope used to support the
drilling tools.

 Electric Control House

On diesel electric rigs, powerful diesel engines drive large
electric generators. The generators produce electricity that
flows through cables to electric switches and control
equipment enclosed in a control cabinet or panel.
Electricity is fed to electric motors via the panel.


Electric Cable Tray

Supports the heavy electrical cables that feed the power
from the control panel to the rig motors.


Elevators

A set of clamps that grips a stand, or column, of casing,
tubing, drill pipe, or sucker rods, so the stand can be
raised or lowered into the hole.






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