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Slide 133. Directional Drilling PETE 411 - Well Drilling
PETE 411Well Drilling
Lesson 33
Directional Drilling
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Slide 233. Directional Drilling PETE 411 - Well Drilling
Directional Drilling
When is it used?
Type I Wells Type II Wells
Type III Wells
Directional Well Planning & Design
Survey Calculation Methods
Buildand Hold
Build-Holdand Drop
ContinuousBuild
KOP
EOC
I II III
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Slide 333. Directional Drilling PETE 411 - Well Drilling
Read ADE Ch.8 (Reference)
HW #15 due 11-12-01 HW #16 due 11-16-01
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Slide 433. Directional Drilling PETE 411 - Well Drilling
Inclination Angle
θ, α , I
Direction Angleφ, ε, A
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Slide 533. Directional Drilling PETE 411 - Well Drilling
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Slide 633. Directional Drilling PETE 411 - Well Drilling
Max.Horiz.
Depart.
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Slide 733. Directional Drilling PETE 411 - Well Drilling
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Slide 1133. Directional Drilling PETE 411 - Well Drilling
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Slide 1233. Directional Drilling PETE 411 - Well Drilling
!"pe I !"pe II !"pe III
Buildand Hold
Build-Holdand Drop
ContinuousBuild
KOP
EOC
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Slide 1333. Directional Drilling PETE 411 - Well Drilling
∆x
∆
I
I
r
r ∆L
In t#e B$I%D
&ection
∆x ! r "1 - cos I
∆ ! r sin I
∆L ! r Ιrad
degIr
180 !
π∆
"#$%
000&18r
π=
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Slide 1433. Directional Drilling PETE 411 - Well Drilling
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Slide 1533. Directional Drilling PETE 411 - Well Drilling
$ig. %.11
42131 xr r andxr
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Slide 1633. Directional Drilling PETE 411 - Well Drilling42131 xr r andxr >+<
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Slide 1733. Directional Drilling PETE 411 - Well Drilling
'()E
'**+& +
& E
'(i)uth 'ngle
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Slide 1933. Directional Drilling PETE 411 - Well Drilling
Exa&'le 1( Design o) Directional Well
Design a directional *ell *ith the +ollo*ingrestrictions,
- Total hori(ontal departure . /00 +t
- True vertical depth T D2 13 /00 +t
- Depth to 4ic4o++ point 56P2 3 /00 +t
- $ate o+ 7uild o+ hole angle 18/ deg9100 +t- Type I *ell 7uild and hold2
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Slide 2033. Directional Drilling PETE 411 - Well Drilling
Exa&'le 1( Design o) Directional Well
(i) Determine the maximum hole angle required.
(ii) What is the t ta! measured depth ("D)#
("D $ %e!! de&th measureda! n' the %e!! ren t the *ertica! de&th )
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Slide 2133. Directional Drilling PETE 411 - Well Drilling
"i *axi&+&Inclination
,ngle
r 1 =18 00015
,. π
r 2 =0( )D 4 1
12 500 2 500
10 000
−
= −
=
D
ft
, ,
,
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Slide 2233. Directional Drilling PETE 411 - Well Drilling
"i *axi&+& Inclination ,ngle
−
−+−=
−++−−+−−= −
500,4)820,3(2
500,4)820,3(2000,10500,4000,10 tan2
x)r r (2
x)r r (2)DD(xDDtan2
221-
421
4212
1424141
maxθ
3.26max =θ
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Slide 2333. Directional Drilling PETE 411 - Well Drilling
"ii *eas+red De't o) Well
ft265,9L
105,4sinL
ft4,105
395500,4xft395
)26.3!s-3,820(1
)!s1(r x
"!ld
"!ld
"!ld
1#$ild
=∴=∴
=−=∴
==
−=
θ
θ
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Slide 2433. Directional Drilling PETE 411 - Well Drilling
"ii *eas+red De't o) Well
265,9180
26.33,8202,500
Lr D%D "!ldrad11
+
+=
++=
π
θ
ft518,13%D =
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Slide 2533. Directional Drilling PETE 411 - Well Drilling
% The actual *ell path hardly ever coincides *iththe planned tra:ectory
% I)portant, ;it target *ithin speci+ied radius
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Slide 2633. Directional Drilling PETE 411 - Well Drilling
+#at is /no0nI ( , I , A ( , A ,
∆% 1 ∆MD (-
Calculateβ 1 dogleg angle
D%& 1 β 100/∆ %
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Slide 2733. Directional Drilling PETE 411 - Well Drilling
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33 Directional Drilling PETE 411 Well Drilling
2 3
