Halliburton Company

Gary E Folmnsbee

Larry Thomas Watters

David D Onan

Ronney R Koch

James L Haney

Randall D Stilley

Vincent J Bila

Leonard R Case

Thomas E Allen

Mark A Clark

John M Richardson

Freddie L Sabins

James M Macadam

Gary D Arnold

Jerry L Gammill

Improved methods of displacing a first liquid through a pipe with a second liquid while preventing the first and second liquids from mixing are provided. In accordance with the methods, a plug is formed in-situ in the pipe between the first and second liquids by injecting a self-thickening liquid therein and permitting the liquid to thicken. The formed plug and the first liquid are then displaced through the pipe with the second liquid. The methods are particularly suitable for carrying out subterranean well bore cementing operations wherein cement slurries are displaced through pipes disposed in well bores.

Method of displacing liquids through pipes

A method of evaluating a slurry mixing and placing process, such as a cementing process, for an oil or gas well comprises identifying and measuring specific subprocesses and parameters thereof, statistically summarizing the parameters and creating a database thereof, and analyzing the statistically summarized parameters to identify or compare against process capabilities to reduce variation, thereby improving specific job performance and the overall process.

Method of evaluating oil or gas well fluid process

Methods of displacing liquids through pipes

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Duncan, OK, United States of America

Gary E Folmnsbee