Cementing wells with crack and shatter resistant cement
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, Roger S. Cromwell, Ronald J. Crook, Frank Zamora
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Abstract
Improved cement compositions and methods of cementing subterranean zones penetrated by well bores are provided. In accordance with the methods, a crack and shatter resistant cement composition is introduced into a subterranean zone by way of the well bore penetrating it comprised of a hydraulic cement, sufficient hydrophilic fibers to make the cement composition crack and shatter resistant upon setting and sufficient water to form a pumpable slurry. Thereafter, the cement composition is allowed to set in the subterranean zone.
Claims9
An improved method of cementing a pipe string in a well bore whereby the set cement can withstand the formation of perforations therein as well as other impacts and shocks subsequently generated by drilling and other well operations without cracking or shattering and forming rubble comprising the steps of:
- (a) pumping a cracking and shatter resistant cement composition into the annulus between said pipe string and the walls of said well bore, said cement composition comprising a hydraulic cement, sufficient hydrophilic fibrillated net-shaped fibers to make said cement composition shatter resistant upon setting and sufficient water to form a pumpable slurry of said hydraulic cement and said fibers;
- and
- (b) allowing said cement composition to set into a hard crack and shatter resistant impermeable mass having ductility and toughness.
Dependencies are inferred from the claim text.