Methods of using cement compositions comprising phosphate compounds in subterranean formations
AssigneeHalliburton Energy Services, Inc.
InventorsAshok Santra, Ronald Crook, Bobby King
Life of this patent
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Abstract
Methods of using cement compositions comprising phosphate compounds in subterranean formations are provided. An example of a method is a method of cementing in a subterranean formation. Other examples of methods include methods of avoiding the loss of circulation in a subterranean formation. Other examples of methods include methods of drilling in a subterranean formation.
Claims27
A method of cementing in a subterranean formation, comprising:
- providing a first slurry that comprises a metal oxide or hydroxide;
- providing a second slurry that comprises a phosphate compound and a water source;
- placing the first and second slurries separately into a subterranean formation;
- permitting the first and second slurries to contact each other within the subterranean formation such that the metal oxide or hydroxide, the water source, and the phosphate compound react to form a cement composition;
- and
- allowing the cement composition to set in the formation.
A method of avoiding the loss of circulation in a subterranean formation, comprising:
- providing a first slurry that comprises a metal oxide or hydroxide;
- providing a second slurry that comprises a phosphate compound and a water source;
- placing the first and second slurries separately into a borehole in the subterranean formation adjacent openings in a region of the subterranean formation in fluid communication with the borehole;
- contacting the first slurry with the second slurry adjacent the openings;
- permitting the first slurry and the second slurry to set to form a plug that seals the openings off from the borehole.
A method of avoiding the loss of circulation in a subterranean formation, comprising:
- providing a cement composition that comprises a metal oxide or hydroxide, a phosphate compound, a set retarder, and a water source;
- placing the cement composition into a borehole in the subterranean formation adjacent openings in a region of the subterranean formation in fluid communication with the borehole;
- and
- permitting the cement composition to set within the subterranean formation adjacent the openings so as to form a plug that seals the openings off from the borehole.
A method of drilling in a subterranean formation comprising:
- using a drilling fluid to drill a portion of a borehole in a subterranean formation;
- providing a cement composition that comprises a metal oxide or hydroxide, a phosphate compound, a set retarder, and a water source;
- placing the cement composition into a borehole in the subterranean formation adjacent openings in a region of the subterranean formation in fluid communication with the borehole;
- permitting the cement composition to set within the subterranean formation adjacent the openings so as to form a plug that seals the openings off from the borehole;
- and
- continuing to use the drilling fluid to drill the borehole in the subterranean formation after permitting the cement composition to set within the subterranean formation.
A method of drilling in a subterranean formation comprising:
- using a drilling fluid to drill a portion of a borehole in a subterranean formation;
- providing a first slurry that comprises a metal oxide or hydroxide;
- providing a second slurry that comprises a phosphate compound and a water source;
- placing the first and second slurries separately into a borehole in the subterranean formation adjacent openings in a region of the subterranean formation in fluid communication with the borehole;
- contacting the first slurry with the second slurry adjacent the openings;
- permitting the first slurry and the second slurry to set to form a plug that seals the openings off from the borehole;
- and
- continuing to use the drilling fluid to drill the borehole in the subterranean formation after permitting the first slurry and the second slurry to set.
Dependencies are inferred from the claim text.