Well completion foamed spacer fluids and methods
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, James E. Griffith, Bobby J. King
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Abstract
Well completion foamed spacer fluids and methods of using the foamed spacer fluids are provided. A method of the invention for displacing a first fluid from a well bore with an incompatible second fluid comprises the following steps. A foamed spacer fluid is placed between the first and second fluids to separate the first and second fluids and to remove the first fluid from the walls of the well bore. Thereafter, the first fluid and the foamed spacer fluid are displaced from the well bore with the second fluid.
Claims32
A method of displacing a first fluid from a well bore with an incompatible second fluid comprising the steps of:
- (a) placing a foamed spacer fluid between said first and second fluids to separate said first and second fluids and to remove said first fluid from the walls of said well bore, said foamed spacer fluid comprising water, a weighting material, a dispersing agent, a suspending agent and friction reducer, a mixture of foaming and foam stabilizing surfactants and a gas;
- and then
- (b) displacing said first fluid and said foamed spacer fluid from said well bore with said second fluid.
A method of displacing drilling fluid from a well bore with a hydraulic cement slurry comprising the steps of:
- (a) placing a foamed spacer fluid between said drilling fluid and said hydraulic cement slurry to separate said drilling fluid from said hydraulic cement slurry and to remove said drilling fluid and filter cake from the walls of said well bore, said foamed spacer fluid comprising water, a weighting material, a dispersing agent, a suspending agent and friction reducer, a scouring agent, a mixture of foaming and foam stabilizing surfactants and a gas;
- and then
- (b) displacing said drilling fluid and said foamed spacer fluid from said well bore with said hydraulic cement slurry.
Dependencies are inferred from the claim text.