cement plug job
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Transcript of cement plug job
![Page 1: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/1.jpg)
Plug Placement Technique
9-5/8” C/Shoe
• Drill pipe/ tubing is lowered to
desired depth (bottom of
planned plug) in the cased /
open hole
![Page 2: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/2.jpg)
• Drill pipe/ tubing is run in
• Mud is circulated thoroughly to
make it homogeneous9-5/8”
C/Shoe
Plug Placement Technique
![Page 3: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/3.jpg)
• Drill pipe/ tubing is run in
• Mud is circulated
• Mud pump stopped
• Pre-flush/ Spacer is pumped
ahead cement slurry to avoid
contamination with mud.
9-5/8” C/Shoe
Plug Placement Technique
![Page 4: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/4.jpg)
• Drill pipe/ tubing is run in
• Mud is circulated
• Pre-flush/ Spacer is pumped
• Calculated volume of cement
slurry is pumped (hole volume
for desired cement rise)
9-5/8” C/Shoe
Pre-flush
Plug Placement Technique
![Page 5: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/5.jpg)
• Drill pipe/ tubing is run in
• Mud is circulated
• Pre-flush/ spacer is pumped
• Cement slurry is pumped
• After-flush is pumped behind
cement slurry to avoid
contamination with mud
9-5/8” C/Shoe
After-flush
Cmt Slurry
Pre-flush
Plug Placement Technique
![Page 6: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/6.jpg)
• Drill pipe/ tubing is run in
• Mud is circulated
• Pre-flush/ spacer is pumped
• Cement slurry is pumped
• After-flush is pumped
• Displacement is done with mud
to balance the cement plug.
9-5/8” C/Shoe
Plug Placement Technique
![Page 7: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/7.jpg)
9-5/8” C/Shoe
• Drill pipe/ tubing is run in
• Mud is circulated
• Pre-flush/ spacer is pumped
• Cement slurry is pumped
• After-flush is pumped
• Displacement with mud.
(Metal volume to be considered).
(Slightly under displacement
preferred to avoid backflow)
Plug Placement Technique
![Page 8: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/8.jpg)
• Drill pipe/ tubing is run in
• Mud is circulated
• Pre-flush/ spacer is pumped
• Cement slurry is pumped
• After-flush is pumped
• Displacement is completed
Balanced Plug
Method
Balanced Plug
Method
Inside Drillpipe & Annulus
columns balanced
9-5/8” C/Shoe
Pre-flush
After-flush
Cmt Slurry
Plug Placement Technique
![Page 9: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/9.jpg)
• Pipe is pulled out slowly off the
cement column.
• In case exact plug top is desired,
string is pulled out up to the
desired cement top only (with
the pipe still inside the cement
column)
9-5/8” C/Shoe
Plug Placement Technique
![Page 10: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/10.jpg)
9-5/8” C/Shoe
• Pipe is pulled out (above cmt top)
• BOP is Closed
Plug Placement Technique
![Page 11: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/11.jpg)
9-5/8” C/Shoe
• Pipe is pulled out (above cmt top)
• BOP is Closed
• Reverse Circulation is
established
Plug Placement Technique
![Page 12: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/12.jpg)
9-5/8” C/Shoe
• Pipe is pulled out (above cmt top)
• BOP is Closed
• Reverse Circulation established
• Excess cement is reversed out.
Plug Placement Technique
![Page 13: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/13.jpg)
9-5/8” C/Shoe
• Pipe is pulled out (above cmt top)
• BOP is Closed
• Reverse Circulation established
• Excess cement reversed out.
• Circulation is stopped
• BOP is opened
• Further pull out for safety
Plug Placement Technique
![Page 14: cement plug job](https://reader036.fdocuments.in/reader036/viewer/2022073118/55a6b5b71a28ab062c8b475d/html5/thumbnails/14.jpg)