drill string-ongc gts-june 2014.ppt
TRANSCRIPT
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DRILL STRINGDRILL STRING
Drill Pipe
Bottom Hole
Assembly:Drill CollarHeavy Wt. Drill PipeStabilizerAuxiliary Tools -
Drilling ar! "WD
#elly $ Top Drive
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DRILL
STRINGCOMPONENTS
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DRILL PIPE
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DRILL PIPE
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Drill Pipes: Lengths
Ranges Length Remarks
Range-1 5.50 6.70 m(18 22 feet
!"s#lete(Rarel$ %se&
Range-2 8.50 '.20 m
(27 0 feet
)#mm#nl$%se&
Range- 11.61.7 m
(8 *5 feet
Less %se&
5
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DRILL PIPE
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Drill Pipe + ,##l #int )lassifiati#n: )#l#r /an&
)#&e
, + DP )lassifiati#n # + )#l#r #f "an&s
)lass !ne hite "an&
Premi%m lass ,# hite
)lass !ne $ell#
)lass !ne #range
3rap !ne re&7
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Drill Pipe ,##l #ints
4 180taper #n "# en& sh#%l&er 3# &%e t# this small angle "# en& is l#nger
hile r%nning in pipe an get hel& %p. 3# this
180
taper helps in a#i&ing pipe getting hel&%p &%ring R9.
4 50taper #n pin en& sh#%l&er
3# &%e t# higher angle pin en& is smaller hile P!!9 this 50taper helps in a#i&ing
&rag.
t makes staking #f DP stan&s easier9
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Tool Joint
%Equivalent Connections
&C '( '-)$*+ ,
&C ) '-/$*+ ,
&C )* )-$'+ , &C 01 0+ H
&C0( 0+ ,
&C 21 0-$'+ ,
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A
PI
SP
ECIFI
CATION
TOOL JOINT
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A
PI
SP
ECIFI
CATION
TOOL JOINT
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A
PI
SP
ECIFI
CATION
Tool Joint
%Tool Joint Markings 3Base o4
t5e Pin677 3T manu4a8turer. symbol69
( 3Wel "ont569
/1 3Wel ;ear69
& 3Pipe manu4a8turer. symbol69< 3=rae6
Example: ZZ 6 70 N E
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4 ,R;L
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>inim%m ?iel& 3trength
4 s the f#re nee&e& t# streth #r #mpressthe &rill pipe %ntil it is permanentl$ &ist#rte&.
@ra&e >in ?iel&3trength psi
# #f gr##es
75000 il
@ 105000 ,#
3 15000 ,hree
16
>i i , il 3t th
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>inim%m ,ensile 3trength4 s the f#re neessar$ t# p%ll the
&rill pipe apart %ntil it "reaks #r
snaps.
4 5A 1'.5 ppf
)lass- gra&e : 17' ,
)lass- @ @ra&e- 251 , )lass- 3 @ra&e- 22 ,
Premi%m gra&e : 1*2 ,
Premi%m @ @ra&e- 1'8 ,
Premi%m 3 @ra&e- 225 ,
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,#rsi#nal ?iel& 3trength
4 ,#rsi#nal $iel& strength #f &rill pipe is the
am#%nt #f tisting f#re a pipe an
ithstan& "ef#re tisting #ff.
4 #rmall$ t#rsi#nal $iel& strength #f pipe
"#&$ is %s%all$ less than that #f t##l B#int.
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/%rst 3trength
4 /%rst strength
#f &rill pipe is
internal
press%re thatan a%se a
pipe t# "%rst #r
spring a leak.
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)#llapse 3trength
4 )#llapse
strength #f &rill
pipe is the
am#%nt #feternal f#re
nee&e& t# r%sh
the si&es #f &rillpipe %ntil it aes
in #mpletel$.
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Drill Collar: Functions
% ,mpart >eig5t on bit 3W?B6% Prevent rill pipes 4rom bu8@ling by retaining t5e
neutral point >it5in itsel4% Provie sti44ness to t5e B.H.A. t5at is essential in
@eeping rilling trae8tory on 8ourse in bot5 verti8al
as >ell as ire8tional >ells
DRILL COLLAR
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A
PI
SP
ECIFI
CATION
DRILL COLLAR
Thick alle! pipe "or sti""ness an! concentration o" #$%
&i'e (iel! &t) Min Tensile st) Elongation
*+,-./ 6+7-./ 140,000 ,,01000 ,* 2
7/ ,,/ 135,000 ,001000 ,* 2
% &peci"ie! 34 $utsi!e 5iameter - nsi!e 5iameter ength o" a !rill collar single that is usuall4 *0 *, "t
% Connections: %ase! on %en!ing &trength 8atio 9%&83eteen 3ox an! pin
% &pecial "eatures such as spiral1 stress relie" groove pin etc
Example: 8 x 213!1" , "5!8 Re#, Sp$%al
DRILL COLLAR
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O
PTION
AL
FEAT&RE
S
DRILL COLLAR
SPIRAL
Di44erential stu8@ up 85an8es greatly
reu8e >5en spirals 8ut in t5eoutsie boy o4 rill 8ollars.
% Wall 8onta8t area is minimize t5ereby
8ausing reu8tion in i44erential 4or8es.
% A8ts as a 8onuit 4or spotting 4luis
meant 4or releasing t5e stu8@ pipe.
DRILL COLLAR
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SELECTI
ON
CR
ITERI
A
DRILL COLLAR
SI'E argest iameter maximum >all t5i8@ness t5at 8an
sa4ely be run in 5ole
e>er rill 8ollars reuire 4or applying >eig5t on bit.
esser 8onne8tions 5en8e less 8onne8tion 5anling
time.
"ore sti44ness to BHA >5i85 is essential to rill a >ell
ire8te 5ole.
esser bening stresses ue to reu8e annular
8learan8e
DRILL COLLAR
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SELECTI
ON
CR
ITERI
A
DRILL COLLAR
&ZE MT;T$N
Ability to 4is5:
Was5 over!
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SELECTI
ON
CR
ITERI
A
DRILL COLLAR
/EIGT
/ /O C*( x SF
W?BF "aximum anti8ipate >t. on bit 3lbs6
#b F Buoyan8y 4a8tor9 F Hole angle 4rom verti8al 3eg6
W F Air >t. o4 BHA 3lbs6
S..b F Sa4ety a8tor 4or bu8@ling F 1.*2 38ommon6
F 1.*1 3Har 4ormation6
DRILL COLLAR
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SE
LECTI
ON
CR
ITERI
A
DRILL COLLAR
T;een t>o se8tions not to ex8ee limit
or normal 8onition : > ?)?
or severe 8onition an 5ig5 4ailure rate: > *)?
9$5@+5@-$5%&8 A 9o!@+i!@-o!
C5ange-overs s5oul 5ave ienti8al ?D to t5at o4 BHA to
reu8e t5e transition e44e8t bet>een se8tions >5i85 a8ts
as stress 8on8entrators
DRILL COLLAR
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SE
LECTI
ON
CR
ITERI
A
DRILL COLLAR
Make Bp Torque
% ital "actor i" not "olloe! might lea! to rapi!
"atigue !amage D premature "ailure o" !rill collar
% C4clic loa!s o" tension D compression !uring !rilling
% " lesser make up torque is applie!1 it might lea! to
"atigue "ailure !ue to c4clic loa!ing D pressure
sealing "ailure
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DRLL PP );R
4 While transortin! " loa#in! /ef#re %nl#a&ing make s%re pin en& threa&
pr#tet#rs are fitte&
3tak pipe at least 1 #r 2 feet a"#e thegr#%n& t# a#i& m%& &irt an& ater
Plae at least s%pp#rts "eteen eah r#s
#f pipes t# a#i& "en&ing #f pipes
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DRLL PP );R
4 $ee ie in tension
;#i& r%nning DP &eli"eratel$ in #mpressi#n
as pipe ill fail easil$ "$ "%kling
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DRLL PP );R
4 A%oi# across cuts
on shoul#er (ace
,his ill &amage the
"# sh#%l&er
f there is ar#ss %t
#r &ent #n sh#%l&er
fae the seal is&amage& an& pipe
ill leak.
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DRLL PP );R
4 A%oi# circu)(erential scars )ir%mferential sars an make een a ne pipe
fail
,his ma$ "e a%se& "$ pipe t%rning in slips
&%ring pipe make %p #r "reak %p
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DRLL PP );R
4 Insection nspet pipes th#r#%ghl$ f#r pin an& "# en&
threa& &amages
nspet pipes f#r ir%mferential sars #n sliparea
nspet pipes f#r ar#ss %ts #n sh#%l&er fae
nspet pipes f#r r##ke&ness
nspet pipes f#r re&%ti#n in , !D
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DRLL PP ;L
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GALLED T+READS
40
+EA,- WEIG+T DRILL PIPE
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Reduces hook load allowing
smaller rigs drill deeper holes
Ease of handling saves trip time
Allows for gradual change in
stiffness
Reduces torque, possibilityof differential stuck up, vertical drag and
friction affecting directional control
4 5A 9DP 50 ppf A D !D at
entral %pset-5-1E2A ,ensile strength: 12 ,
+EA,- WEIG+T DRILL PIPE
$ELL-
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API
SP
ECIFICATION
$ELL-
&quare or hexagonal shape! steel pipe
connecting sivel to !rill string an! through
the rotar4 ta3le transmits torque to the !rill
string
% &peci"ie! 34:
&i'e 9;cross lats - ength
oer pin connection - Bpper %ox F
connection
T4pe 9&quare or Fexagonal
Example:51!4, 40 6-, NC 50 P$), "5!8 L
Re# *x, exa#*)al
$ELL-
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A
PI
SP
ECIFI
CATION
$ELL-
STA.ILI/ER
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FEAT&RE
S
S
Play importat role for maitaii! theplae" tra#e$tory% $our&e $orre$tio "uri!"rilli!
'ype% &i(e ) pla$emet a*e$t& "e&ire""ire$tio% re"u$e "o!le!& ) miimi(e
$ompli$atio&
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STA.ILI/ER
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+,-D,D -/D, preferaly for &oft a" me"ium
formatio&. epairale at el"i! &hop&
',/- -/D, har" to ery har" formatio&.
i!le pie$e hi!h &tre!th alloy &teel ith la"e
fa$e& impre!ate" ith tu!&te $ari"e i&ert&. ot
repairale :; a o"y a" a &leee. 'he &leee i& &hru?
@tte". la"e& har" fa$e" ith tu!&te $ari"e
i&ert&. +or out &leee& remoe" y $utti! a"aother &leee &hru? @tte"
',/D,D -,,, all ut the har"e&t formatio.
OeApie$e o"y a" repla$eale &$re o &leee ith
la"e&
FEAT&RE
S
STA.ILI/ER
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,P-/C,/-, +,/ P/D preferaly ear it
&taili(er for maitaii! hole !au!e i har" a"
ara&ie formatio&. +ear pa"& Bla"e& ea&ily
$ha!e" ithout opei! the &taili(er.
OAO'/' -,,, e*e$tie i har"
formatio& a& ha& ore hole all &upport to the&tatioary ruer &leee&. 'hat a$t& a& a "rill
u&hi! hile the &tri! rotate&. ;eep& hole !au!e
lo!er tha la"e &taili(er& a" "oe& ot "ama!e
the ore all. leee& are ea&ily $ha!eale ut
ha& temperature limitatio& B to 1200C a" a
&horter ear life i rou!h all&
FEAT&RE
S
Cro&& Oer&
C
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Cro&& Oer& 5 DP E 6A1F2 DC
5 DP E 8 DC
6A1F2 DC E 8 DC
9A1F2 DC E 8 DC
Cro&&oer&
5 DP E 6A1F2 DC
5 DP E 8 DC6A1F2 DC E 8 DC
9A1F2 DC E 8 DC
Cro&& Oer&
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Cro&& Oer&