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US 6,554,068 B1Granted
Method of downhole fluid separation and displacement and a plug utilized therein
AssigneeHalliburton Energy Service,s Inc.
InventorsJiten Chatterji, B. Raghava Reddy, Frank Zamora, Roger S Cromwell
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Abstract
A method of downhole fluid displacement and a plug utilized in the method according to which the plug is inserted in a pipe between two fluids for separating and displacing one of the fluids. The plug has a specific gravity of less than the fluid above it, so that, after the displacement operation, the plug floats to the top of the latter fluid for recovery.
Claims21
A method of displacing fluid from a pipe disposed in a well bore and cementing between an annulus formed between the casing and the well bore, comprising:
- introducing a plug into the pipe above the fluid;
- introducing a cement slurry into the pipe above the plug so that the cement slurry forces the plug downwardly in the pipe and displaces the fluid from the pipe and into the annulus;
- breaking the plug into pieces, and
- causing the pieces to float to the top of the well bore for recovery.
1 more element
Dependencies are inferred from the claim text.