This document discusses directional drilling. It covers applications of directional drilling such as geological constraints and inaccessible locations. It also discusses deviated well planning, including specifying the target, rig location, and geological section. Finally, it discusses profile planning, including kick off point, build up rate, and drop off rate. Tools for directional drilling discussed include bent subs, mud motors, and rotary steerable systems.

1. Ch. 11 Directional Drilling

2. DIRECTIONAL DRILLING
1. Applications
2. Deviated Well planning
3. Profile Planning
4. Deflection Tools

3. 1. APPLICATIONS
• Geological Constraints :
• Salt Domes
• Faults
• Inaccessible Locations :
• Offshore Platform
• Towns/cities
• Relief Well Drilling

4. 1. APPLICATIONS
• Sidetracking :
• Fish
• Exploration
• Workover
• Completion Strategy :
• Multiple zone drainage
• Horizontal Wells

5. Applications

6. 2. DEVIATED WELL PLANNING
• Target Specification :
• Depth
• Location
• Size
• Shape
• Rig Location
• Adjacent Wells

7. 2. DEVIATED WELL PLANNING
• Geological Section
• Casing and Mud Programmes

8. Well Trajectories
N
E
Displacement
Cross Section
Along Hole Depth
Plan View
E
N
Vertical
Depth
Vertical
Depth

9. 3. PROFILE PLANNING
• Rig Location
• Kick Off Point (KOP)
• Build up Rate/Drop Off Rate (BUR)
• Tangent Angle

10. Typical
Configurations
KOP
KOP
KOP
Build Up Section
Tangential Section
Drop off Section

11. Trajectory Planning
x
y


E
X
C Y T
B
A
O
P R
R
1000' 2000' 3000' Displacement
2000'
4000'
6000'
8000'
10000'
d
D

12. Directional Exercise

13. Direction in which bit will drill
Side Force
Tilt Angle

14. Bent Sub

15. Bent Sub
and Motor
Bent Sub
MWD
Motor
Mud Motor
Drill Bit

16. Steerable System
Bit Offset
Side Force
Upper Power
Section
Mid Body
Stabilizer
Lower Power
Section

17. Reservoir Navigation Sensor Sub
MWD Sub
Top Stabilizer
Alternator/Pulser Sub
Non Rotating Sleeve With Steering Ribs
Drive Sub
Rotary
Steerable System

18. Hydraulic Control Valves Steering Ribs
Rotating Shaft Drive Non-Rotating Steerable
Stabilizer Sleeve
Control Electronics
and Inclination Sensors
Steering System

19. High Side
Sleeve Orientation
Bit Drive Shaft
Decoupled Stabilizer
Sleeve
P2
P3
P1
Steering System (End View)

20. Bottom Stabiliser
Top Stabiliser
L1
L2
Bit
Tilt
Bit
R

21. BHA Design
(a) Packed Hole (b) Pendulum (c) Fulcrum
Stab
Stab
Stab
Stab
60' DC
30' DC
30' DC
30' Monel
Reamer
Bit
Tendency to maintain angle
Stab
Stab
Stab
90' DC
30' DC
30' DC
20-30' Monel
Reamer
Bit
Tendency to drop angle
Stab
Stab
Stab
90' DC
30' DC
60' Monel
Reamer
Bit
Tendency to build angle

22. Mud Motors
1/2
3/4
4/5
5/6
7/8
8/9
9/10
Transmission
Unit
Power Unit
(Rotor and Stator)
Tubular Housings
and Stabilizer
Bearing

23. Turbine Specifications
200 400 600 800
3000
1000
2000
0
Pressure Drop (PSI)
Torgue
ft-lbs
RPM
200 400 600 800 1000
1500
2000
500
1000
0
Pump Rate GPM
111/2"
113/4
"
13/4"
23/4
"
33/4"
43/4"
61/4
"
91/2
"
91/2
"
63/4"
63/4
"
43/4"
33/4
"
23/4
"
13/4
"
61/2"
8"
8"

24. Turbine
Driveshaft
Stator
Stator
Mud Flow
Rotor
Rotor
Rotation
Driveshaft
Bearing
Section
Rotor and
Stator
Section

25. Turbine Assemblies
Stabilizer
Near Bit Stabilizer
Bit
Stabilizer
2 Monel Drill Collars 50 ft.
25 ft.
15 ft.
7 ft.
1 1/2 ft.
1 1/2 ft.
Circulating Sub
71/8 in.240 Turbodrill

26. Directional
Design