Ky thuat khoan dau khi.pdf
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COPYRIGHT 2001,NExT. All Rights Reserved
K THUT KHOAN DU KHK THUT KHOAN DU KH
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MT S THNG TIN C NHN
H v Tn: Trn Xun o
Nm sinh: 1956
Nm tt nghip i hc: 1982Nm bo v lun n TS : 1996
Nm bo v lun n TSKH : 2000
Ni cng tc hin nay: Vin NCKH v TK-VSP
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NI DUNG MN HC1. Gin khoan du kh;
2. Thy lc v dung dch khoan;
3. Bm trm xi mng;4. Thit k ng chng v chui cn khoan;
5. Chong khoan;
6. Khoan nh hng;7. o trong khi khoan
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Gin khoan du kh
Tng quan; Cc loi gian khoan du kh; H thng nng lng trn gian; H thng nng (ko th); H thng tun hon dung dch; H thng xoay; H thng kim sot ging; H thng o trong khi khoan; Nhng thit b chuyn bit trong khoan
bin.
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Gii thiu Gin khoan du khGii thiu Gin khoan du kh
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Cc loi ginCc loi gin -- Rig TypesRig Types
XXlan khoanlan khoan
BargesBargesGiGin khoan t linn khoan t linLand RigsLand Rigs
GiGin khoan vi tn khoan vi tu tip liuu tip liuTender AssistedTender Assisted
TTu khoanu khoan
DrillshipDrillship
Na ni na chNa ni na chmmSemiSemi--
submersiblesubmersible
GiGin t nngn t nngJackJack--upup
GII THIUGII THIU -- IntroductionIntroduction
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su nc v loi gin su nc v loi gin
0-5 m20-120 m 60-800 m 30-2800 m
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Gin khoan t linGin khoan t lin
LoiLoigiginn khoankhoan thngthng dngdng nhtnhtddngng khoankhoantrntrn tt linlin
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1.Gi xp cn - Pipe Racks
2. Dc tip khoan - Ramp
3. Thp khoan -Derrick
4. Chung kh - Monkey board5. Rng rc nh - Crown block
6. Cp khoan - Drill line
7. Khi rng rc ng & mctreo - Block & hook
8. Quang treo /u nng - Links
& elevator9. Cn ch o - Kelly
10. Cu trc di -Substructure
11. Cm i p - BOPs
Gin khoan t linGin khoan t lin
Gii thiuGii thiu
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2
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11
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Cc h thng chnh H thng cung cp nng lng. H thng nng th, H thng tun hon,
Thit b quay, H thng i p, o trong khi khoan Cng sut v cu trc ca thp khoan ,
Cc lai ng,
Cc h thng chnh trn gin
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Rng rc nh (tnh) -Crown Block
Rng rc c nhFixedsheaves
Deadline u cp cht
Mc treo - Hook
W
Ti khoan -Drawworks
ng cp nhanh- Fastline
W4 W
4
W4
W4 W
4
W4
Cc nguyn tc c bn; H thng nng th;
Cp khoan :
2. H thng nng th
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o ngknh dy cpng knh ca mt dy cp l ng knh ca ng trnngoi tip bao quanh tt c cc si cp. N l s o mt ctngang ln nht.
2. H thng nng
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Nhng nh gi khi thit k
1. Xc nh chiu su ging khoan ln
nht.2. Xc nh ti trng ln nht trong khi
khoan hoc chng ng,
3. S dng nhng gi tr ny la chncp khoan, thp khoan v cng sutca thp.
2. H thng nng
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Thp khoan cung cp chiu cao cn thit vchu ti trng ln mc khi ko th bdng c khoan, ng chng.
Thp khoan v cu trc ca thp phi khe chu c ti trng ln mc,
ng cp cht, ng cp nhanh, titrng ca cn dng v sc gi
Cng sut v cu trc ca thp khoan
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Cng sut v cu trc ca thp khoanC hai lai thp khoan :
Lai tiu chun : l cu trc c rp li vi
nhau bng bu lng, thng s dng ccgin khoan ngoi bin.
Loi ct hay loi di ng :
Lai ny c quay trn 1 ci tr v c hxung bng ti khoan sau khi khoan xong,sn sng ko ti v tr mi.
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Ti trng ln thp tnh :
= FastLine Load + Hook Load + DeadLine Load
= HL/4 + HL + HL/4 = 3/2HL
Vi h thng nng c N ng dy n rng rc ng, ti
trng tnh ln thp c tnh bi := { (N + 2) / N } HL,
N = s ng dy cp n rng rc ng
HL = Ti trng ln mc treo.
H thng nng
Rng rc nh (tnh) -Crown Block
Rng rc c nhFixed sheaves
Deadline
u cp cht
Mc treo - Hook
W
Ti khoan -Drawworks
ng cp nhanh- Fastline
W4 W
4
W4
W4 W
4
W4
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H thng nng
Hiu sut ca h thng nng
Hiu sut ca h thng nng
EF = { K ( 1-KN) } / { N( 1-K ) }.
Ti trng ln ng cp nhanh
= HL / (N * EF),
K = Hiu sut ca rng rc v dy cp
Ti trng ln ng cp cht :
DL = ( HL * KN) / ( N * EF) .
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Nu bn ca dy cp bit, h s thit k c th c tnh
DF = Nominal strength of wire rope (lb) / Fast-line Load (lb),
For K = 0.9615
Number of Line strung Efficiency Factor6 0.874,
8 0.842,
10 0.811,
12 0.782.
Min Design Factors;
Drilling/Tripping : 3
Casing Running : 2
H thng nng
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V nguyn l, ti khoan cn c 1 HP cho 10ft khoan. Do cho ging khoan su 20,000ft, ti khoan cn c cngsut 2000 HP Cch khc tnh cng sut yucu
Tc ng cp nhanh (Vf);
Vf = N * VL
VL = Tc ca rng rc ng
Cng sut cho ti khoan :
H thng nng
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Cng sut ti tang ti : = FL * Vf
P = (HL * VL) / EF
Theo h o lng Anh, cng sut c tnhbng M lc, phng trnh trn c vit nh
sau:
Cng sut ti tang ti = (HL * VL) / EF *33,000
Cng sut yu cu ca ti:
H thng nng
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2
3. H thng tun hon dd
Annulus
Drill pipe
Open hole
Casing
Drill collar
Mud pump
Mud pit
Drill bit
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Triplex Pump
Phn chnh ca h thng tun han l cc my bm,
C hai lai bm 2 piston v bm 3 piston
3. H thng tun hon dd
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CNG SUT MY BM
Tnh ton cng sut my bm:
1714
pqCng sut
MB (HHP)
D=
Trong :
q-lu lng bm, gpm
Dp-Tn hao p sut trong h thng tun hon,psi
Cng sut my bm (HHP)-m lc (hp)
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My bm ly tm : My bm ly tm s dng cung cp dung
dch cho my bm v cc thit b tch cht
rn, thit b trn dung dch -Cc thit b khc:
Kch thc ca gin phi kt hp cht ch vicc thit b trong h thng tun han, cc thit
b tun han quyt nh n tc khoan vcht lng ging khoan
3. H thng tun hon
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Cc thit b ph tr:
Cc thit b khc trong HTTH gm c: Lai dd sdng quyt nh lai sn rung, ging
khoan su yu cu nhiu hn 3 sn rung.1. B cha-Mud Pits: S lng v kch thc phthuc vo kch thc v chiu su ging khoan,kch thc ca gin v khang khng trn gin
(c bit i vi gin khoan ngai bin)2. Thit b tch kh3. My bm ly tm v thit b lm sch dung dch4. My tch ct v my tch bn.
3. H thng tun hon
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Cng sut quay yu cu thng bng
1.5-2 ln tc quay ph thuc vochiu su ging.
Vi tc quay l 200 vng/pht, cngsut quay yu cu l khong 400 HP.
4. H thng quay
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Cn ch o /ng c
nh cung cp nnglng cn thit chovic ph hy t trong khi khoan c thl cung cp m menquay
Cn ch o /ng c nh -
Cc thnh phn chnhCc thnh phn chnh
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H THNG KIM SOT GING
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A = i p vnh xuyn (i p a nng)
G = i p quay chng phun (b phntruyn ng quay v ng kn dng trnthit b chng phun cho php vn hnh ng
vi p sut thp). R = i p n dng ngm vi mt b
ngm
Rd = i p kp dng ngm vi hai b
ngm Rt = i p ba dng ngm vi ba b ngm
S = Mt bch gia cc cm BOP
M = p sut lm vic tng ng 1,000psi (68.95 bar)
H thng i p bao gm :5. H thng i p
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i p vnh xuyn (i p a nng)
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i p n dng ngm vi mt b ngm
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During drilling process :During drilling process :
The well is controlled
by a BOP and choke
manifold
As the well is drilled :
Each annulus issealed off by the
wellhead
u gingu gingis the surfacefoundation on
which the well
is built up
during the
drilling
operations.
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u ging khai thcu ging khai thc
Wellhead
Xmass TreeThe BOP's are removed
After the tubing is installed :
The X mass tree is
installed to control theflow from the well
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H thng H thng u gingu gingChu ti treo cc ct ng
1
2 kn
Ging v pha ngoi
ng chng-va
Gi p sut khi chng phun, thva, ng ging
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What does wellheads do ?
HANG-OFF WEIGHT1
2
3
4
CONTAINS PRESSURE
MONITOR THE WELL SAFETY
PROVIDE A BASE FOR THE
XMAS TREE
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What are the main components ?What are the main components ?
Casing Head Housing
Casing Head Spool
Tubing Head Spool
X-Mass Tree
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Well Head TypesWell Head Types
1. Conventional spooled system
2. Compact spool systems
3. Mud line suspension system
4. Subsea wellheads
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Conventional spooled systemConventional spooled system
Casing Head Housing
Casing Head Spool
Tubing Head Spool
BOP's Stack
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Compact WellheadsCompact Wellheads
The BOP's Stack can
be left in place until
the installation of X-
Mass tree It saves rig time
reduction of flanged
connections
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Casing Head HousingCasing Head Housing
First element of the wellheadFirst element of the wellhead
Supporting the
next string of
casing
Connecting or
adapting to well
control
equipment
Sealing the
wellbore from
the atmosphere
Controlling
access to the
wellbore :
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Casing Head SpoolsCasing Head Spools
Second element of the wellheadSecond element of the wellhead
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Casing HangersCasing Hangers
Conductor
pipe
Surface casing
Intermediate
casing
Landing area
Slip type hanger (wraparound
casing slips) or
Mandrel type hanger
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Tubing Head SpoolsTubing Head Spools
Third element of theThird element of thewellheadwellhead
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Tubing Hangers :Tubing Hangers :
Tubing
Production casing Tubing Head Spool
Tubing Hanger
Tubing Hanger
Tubing Head Spool
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Mud line suspension system
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Subsea Wellhead System
18-3/4 Wellhead
With 20 casing installed
Run Corrosion Cap
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thit b o trong qu trnh khoan (mwd)
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c ch hot ngca MWD
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Mt ct dc MWD
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thit b o logtrong qu trnh
khoan