1. PETE 411 Well Drilling
Lesson 29 Cementing

2. Cementing Cementing Processes Density of Mixtures Cementing Equipment
Casing
Liner
Squeeze
Plug
Density of Mixtures
Cementing Equipment

3. Read: Applied Drilling Engineering, Ch. 3
HW # Well Control – W&W due

4. Cement is used in Drilling Operations to...
Support and protect the casing
Prevent the movement of fluid through the annular space outside the casing
Stop the movement of fluid into vugular or fractured formations
Close an abandoned well or a portion of a well
Sidetracking

5. Types of Cementing Processes
I. Primary Cementing
1. Full String
2. Liners
3. Large Pipe (lesson 31)
4. Stage (lesson 31)
A. Survey and perforate
B. Stage collars

6. Primary Cementing Full String Cementing Liner Cementing Steel Casing
Borehole
Cement
Steel Liner
Full String Cementing
Liner Cementing

7. Types of Cementing Processes
II. Squeeze Cementing
1. Shoe
2. Casing (up-hole)
3. Open-hole (lost-circulation)

8. NEW SLURRY

9. Types of Cementing Processes
III. Plugging
1. Open-hole plug back
A. Fishing Operations
B. Abandonment
2. Casing

11. Types of Cementing Processes
IV. Special Techniques
1. Land
2. Off-shore

12. Mixing Cement (basis is 1 sk. of cmt.)
The density-volume formula:
Slurry Yield (volume of mixture/sk):

13. Rotary Drilling Cementing (basis is 1 sk of cmt.)
Density of Each Component in Slurry:
e.g. Density of Barite =
Specific Gravity of Barite * Density of Water

14. Rotary Drilling Cementing (basis is 1 sk. of cmt.)
Density of Cement Slurry:

18. Wiper Plugs
Wiper plugs are equipped with rubber-cupped fins which wipe mud from the walls of the casing ahead of the cement and clean the walls of casing behind the slurry.
Examples of wiper plugs are shown in the next slide. The top plug also serves as a means of determining when the cement is in place.

20. Mud film thickness Feet of fill per 1000’
5 1/2” 7”
1/16” 1.6mm
1/32” 0.8mm
1/64” 0.4mm

26. Cementing
After
Cementing
(check)