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© 2001 PetroSkills LLC, All Rights Reserved
Drilling RigsDrilling Rigs
Cable Tool RigCable Tool Rig
Rotary RigRotary Rig
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Cable Tool RigsCable Tool Rigs
Cable tool rigs use a heavy bitCable tool rigs use a heavy bithanging from a wire rope to drillhanging from a wire rope to drill
Drilling action from bit impactingDrilling action from bit impacting
the formationthe formation
Must use a bailer to removeMust use a bailer to remove
cuttings from holecuttings from holeNot used much any moreNot used much any more
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Cable Tool RigCable Tool Rig
A cable isA cable isconnected to theconnected to the
walking beamwalking beam
which moves thewhich moves thebit up and downbit up and down
No mudNo mud
circulationcirculation
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Land RigsLand Rigs
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Land RigsLand Rigs
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Rotary Drilling RigsRotary Drilling Rigs
The drill string is rotated turningThe drill string is rotated turningthe bit which drills the formationthe bit which drills the formation
Drilling mud is pumped down theDrilling mud is pumped down the
drill string and back up thedrill string and back up theannulus to remove cuttingsannulus to remove cuttings
The rotary rig is the drilling rigThe rotary rig is the drilling rig
used todayused today
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Rotary Drilling RigRotary Drilling Rig
Rotation of theRotation of thedrill string turnsdrill string turns
the bitthe bit
Drilling mud isDrilling mud iscirculated to liftcirculated to lift
cuttings out ofcuttings out of
the holethe hole
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Rotary Drilling RigRotary Drilling Rig
The rotaryThe rotarytable turnstable turns
the drillthe drill
string whichstring whichturns the bitturns the bit
and makes itand makes it
drilldrill
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Rotary Drilling RigRotary Drilling Rig
A top drive can beA top drive can beused to turn theused to turn the
drill string ratherdrill string rather
than using thethan using the
rotary tablerotary table
More e!pensiveMore e!pensive
but may save timebut may save time
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Rotary Drilling RigRotary Drilling Rig
The derrick mustThe derrick mustbe modified withbe modified with
guide rails andguide rails and
be able tobe able towithstand thewithstand the
tor"uetor"ue
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Rotary Rig TypesRotary Rig Types
LandLand
#ffshore#ffshore
PlatformBarge
Jacku
Semisu!mersi!le"rill shi
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Land RigsLand Rigs
Can be anythingCan be anythingfrom a small $from a small $
mobile rig to amobile rig to a
very large rigvery large rigDesigned to drillDesigned to drill
in almost anyin almost any
environmentenvironment
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Rotary RigsRotary Rigs
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#ffshore Rig#ffshore Rig
%latform rig%latform rigRigged u o#
a latform
$a% !eerma#e#t or
drill the &ells
a#d the# leave
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#ffshore Rig#ffshore Rig
&arge rig&arge rigBottom
suorted
'loat to locatio#Si#k !efore
drilli#g
Shallo& &ater
(fte# referred to
as i#la#d !arge
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#ffshore Rig#ffshore Rig
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#ffshore Rig#ffshore Rig
&ottle type&ottle typesubmersiblesubmersible
)arl% desig# for
deeer &ater * +0feet
Relaced !%
ackus
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#ffshore Rig#ffshore Rig
ArcticArcticsubmersiblesubmersible
-ses a
caisso# tosuort the rig
.eeded for ice
flo&s
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'ackup'ackup/hree to four
legs
/o&ed tolocatio# &hile
floati#g o# the
hull
#ffshore Rig#ffshore Rig
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#ffshore Rig#ffshore Rig
'ackup'ackupJacks legs
do a#d
hull out ofthe &ater
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#ffshore Rig#ffshore Rig
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#ffshore Rig#ffshore Rig
(emisubmersible(emisubmersible'loats i# the &ater
/o&ed or self
roelled
A#chored or
d%#amicall%
ositio#ed
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#ffshore Rig#ffshore Rig
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#ffshore Rig#ffshore Rig
Drill shipDrill ship'loats o# a shis
hull
Ca# carr% moreeuime#t a#d
cargo tha# semi
.ot as good i#
rough &ater
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#ffshore Rig#ffshore Rig
Drill shipDrill ship'loats o# a shis
hull
Ca# carr% moreeuime#t a#d
cargo tha# semi
.ot as good i#
rough &ater
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#ffshore#ffshore
Motion compensator Motion compensator
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#ffshore#ffshore
Newer generation rigs use theNewer generation rigs use the
drawworks for motion compensationdrawworks for motion compensation
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#ffshore#ffshore
RiserRisertensioner tensioner
/he riser must
remai# i#te#sio#
#ff
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#ffshore#ffshore
%neumatic%neumaticcylinders arecylinders are
used to keepused to keep
a constanta constanttension ontension on
the riserthe riser
#ff h
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#ffshore#ffshore
(tarting a well(tarting a wellfrom a floatingfrom a floating
vesselvessel
#stall temorar%guide !ase a#d
start drilli#g
Cutti#gs are
retur#ed to the
sea floor
#ff h
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#ffshore#ffshore
/he# ru# a#d
ceme#t the
co#ductor or
structural casi#g
&ith theerma#e#t guide
!ase
#ff h#ff h
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#ffshore#ffshore
/he erma#e#tguide !ase
co#tai#s the
&ellhead
euime#t
/he B(Ps are
attached to the
erma#e#t guide!ase
#ff h#ff h
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#ffshore#ffshore
(ubsea %(ubsea %being loweredbeing lowered
below abelow a
semisubmersiblesemisubmersible
#ff h#ff h
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#ffshore#ffshore
(ubsea %)s(ubsea %)sare largeare large
#ff h#ff h
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#ffshore#ffshore
%ossible%ossiblecomponents of acomponents of a
riser systemriser system
#ff h#ff h
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#ffshore#ffshore
(ubsea wellhead(ubsea wellhead
#ff h#ff h
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#ffshore#ffshore
#ff h#ff h
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#ffshore#ffshore
#ff h#ff h
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#ffshore#ffshore
#ff h#ffshore
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#ffshore#ffshore
#ff h#ffshore
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#ffshore#ffshore
#ff h#ffshore
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#ffshore#ffshore
#ffshore#ffshore
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#ffshore#ffshore
#ffshore#ffshore
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#ffshore#ffshore
#ffshore#ffshore
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#ffshore#ffshore