1. Lesson 30 Cementing - cont’d
PETE Well Drilling
Lesson 30 Cementing - cont’d

2. Cementing cont’d Large-Hole Cementing Cementing of Liner
Through Casing
Through Drill Pipe
Through Grout Pipe
Cementing of Liner
Cementing from Floater
Multistage Cementing
Cement Bond Log

3. Read: Applied Drilling Engineering Ch. 3. Cementing
HW #16 – Cementing of Conductor Casing Due November 22, 2002

4. Normal Displacement Method
Large-Hole Cementing
Normal Displacement Method
Down the inside of the Csg.
Use two wiper plugs
Takes a long time . . .
Large surface area exposed
to the cmt.

5. Inner String Cementing
Large-Hole Cementing
Inner String Cementing
Down the inside of the DP
Use top wiper plug
Stab-in adapter
Much shorter displ. time

6. Large-Hole Cementing Outside Cementing 1. Down the inside
2. Small-dia. pipe outside
Cmt and gradually
remove the pipes
Alternative:
Pipes attached
(for large pipes)

7. Drilling Liners
Liners are commonly used to seal the openhole below a long intermediate casing string to:
1. Case off the open hole to enable deeper drilling.
2. Control water or gas production
3. Hold back unconsolidated or sloughing formations.
4. Case off zones of lost circulation and/or zones of high pressure encountered during drilling operations.

8. Drill Pipe
Liner

10. Displ.
Mud
Dart
Cmt.
Ball
Dart
Ball

11. Multi-Stage Cementing
Pump first stage
Displace cmt.
Open stage tool
Pump second stage
Displace cmt
Last plug closes tool

12. Opening Bomb
Closing Plug
Stage Collar
Cementing Basket

13. Cmt
Mud
Cmt

14. BAD
GOOD

15. Before Squeeze
After Squeeze

17. Tieback liner showing sealing nipple

18. Liner and sealing nipple
1. Reinforce the intermediate casing worn by drilling.
2. Provide greater resistance to collapse stress from abnormal pressures.
3. Provide corrosion protection.
4. Seal an existing liner which may be leaking gas.

19. Delayed Set Cementing

20. Reverse Circulating Cementing