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US 7,407,009 B2Granted
Methods of using cement compositions comprising phosphate compounds in subterranean formations
AssigneeHalliburton Energy Services, Inc.
InventorsAshok K. Santra, Ronald J. Crook, Bobby J. King
Life of this patent
Estimating the term…
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;
- sequentially placing the first and second slurries into a portion of a well bore that penetrates 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 and at least partially bond the walls of the well bore to the exterior surface of a pipe string disposed in the well bore.
3 more elements
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;
- temporarily suspending the drilling of a borehole in a subterranean formation;
- during the temporary suspension of drilling, sequentially placing the first and second slurries into a portion of the borehole in the subterranean formation adjacent openings in 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
- resuming drilling.
5 more elements
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 that comprises a sugar and a borate compound, and a water source;
- temporarily suspending the drilling of a borehole in a subterranean formation;
- during the temporary suspension of drilling, placing the cement composition into a portion of the 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
- resuming drilling.
3 more elements
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 portion of a well bore that penetrates a subterranean formation by separating the first slurry from the second slurry with a spacer fluid;
- 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 and at least partially bond the walls of the well bore to the exterior surface of a pipe string disposed in the well bore.
3 more elements
A method of servicing a subterranean formation, comprising:
- providing a first slurry that comprises a metal oxide or hydroxide dispersed in a fluid that comprises at least one fluid selected from the group consisting of an oil-based or a synthetic-based fluid;
- providing a second slurry that comprises a phosphate compound and a water source;
- placing the first and second slurries separately into a subterranean formation, wherein either the first or second slurry is introduced through a pipe string disposed in a well bore and the other slurry is introduced through an annulus defined by the outer surface of the pipe string and the walls of the well bore;
- 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.
3 more elements
Dependencies are inferred from the claim text.