Cement compositions with improved corrosion resistance and methods of cementing in subterranean formations
AssigneeHalliburton Energy Services, Inc.
InventorsLance E. Brothers, Anthony V. Palmer, William J. Caveny
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Abstract
The present invention relates to subterranean well cementing operations, and more particularly, to cement compositions having improved corrosion resistance and methods of using such compositions in subterranean formations. The cement compositions generally include an unhydrated cement that includes a high alumina cement, a silica source, and a soluble phosphate; and a set retarder that includes a water soluble carboxylic acid. Optionally, other additives may be included, such as accelerants, dispersants, weighting agents, and the like.
Claims23
A method of cementing in a subterranean formation comprising the steps of:
- providing a cement composition comprising an unhydrated cement that comprises a high alumina cement, a silica source, a soluble phosphate, and a set retarder comprising a water soluble carboxylic acid;
- placing the cement composition into the subterranean formation;
- and
- permitting the cement composition to set therein.
Dependencies are inferred from the claim text.