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

• Drill pipe/ tubing is run in

• Mud is circulated thoroughly to

make it homogeneous9-5/8”

C/Shoe

Plug Placement Technique

• 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

• 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

• 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

• 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

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

• 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

• 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

9-5/8” C/Shoe

• Pipe is pulled out (above cmt top)

• BOP is Closed

Plug Placement Technique

9-5/8” C/Shoe

• Pipe is pulled out (above cmt top)

• BOP is Closed

• Reverse Circulation is

established

Plug Placement Technique

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

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