Patent · US Active

Cementing compositions containing substantially spherical zeolite

US7485185B2 · kind B2 · utility

3Cited by
13References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 13, 2006
Grant dateFeb 3, 2009
Priority date—
Expiry dateJan 25, 2027

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC09K8/467
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

A cementitious composition for cementing an oil or gas well and which exhibits when cured, increased flexural strength and a flexural strength to compressive strength ratio between from about 0.29 to about 0.80, contains a hydraulically-active cementitious material, such as Portland cement, and substantially spherical zeolite. Representative zeolites include natrolite, heulandite, analcime, chabazite, stilbite, and clinoptilolite. The weight percent of zeolite in the cement composition is generally less than or equal to 15 percent. In practice, a well bore may be cemented by pumping the activated slurry and pumping it within the well bore to a pre-selected location and allowing it to solidify.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.