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US4095987A
Expired / Lapsed
US
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Method of and composition for cementing oil wells
Assignee: Texaco Inc
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Filing: 1976-12-29
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Granted: 1978-06-20
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Expires: 1996-12-29
Abstract
Abstract This invention relates to an improved oil well cement composition and a method of use thereof in wells penetrating subterranean formations. My U.S. Pat. No. 3,849,317, issued Nov. 19, 1974, is directed to the hydrolyzed cereal solids as an additive for the reduction of gel strength and yield point of an aqueous drilling fluid saturated with calcium hydroxide in the liquid phase.
Inventors
- 👤 Thad O. Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:24
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04; C04B; C04B24/00; C04B24/24; C04B24/38
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
A method of cementing a zone in an oil well penetrating a subterranean formation comprising injecting down the well and positioning in the zone to be cemented a hydraulic cement aqueous slurry composition comprising dry hydraulic cement, and from about 0.05 to about 5.0 percent by weight, based on dry hydraulic cement of a cement friction reducing additive consisting of hydrolyzed cereal solids which is comprised of hydrolyzed cereal solids which is comprised of from about 15% to about 25% by weight di-saccharides, tri-saccharides, tetra-saccharides, and penta-saccharides, and from about 75 to about 85% by weight hexa-saccharides and above, and sufficient water to form a pumpable slurry, and allowing the cement thus positioned to set to a monolithic mass.
Claim 2
Independent Claim
119 words
A method of cementing a zone in an oil well penetrating a subterranean formation comprising injecting down the well and positioning in the zone to be cemented a hydraulic cement aqueous slurry composition comprising dry hydraulic cement, and from about 0.05 to about 5.0 percent by weight, based on dry hydraulic cement of a cement friction reducing additive consisting of hydrolyzed cereal solids which is comprised of hydrolyzed cereal solids which is comprised of from about 15% to about 25% by weight di-saccharides, tri-saccharides, tetra-saccharides, and penta-saccharides, and from about 75 to about 85% by weight hexa-saccharides and above, and sufficient water to form a pumpable slurry, and allowing the cement thus positioned to set to a monolithic mass.
Claim 3
Dependent Claim
19 words
Method as claimed in claim 1 wherein the concentration of said additive is from about 0.5 to about 2%.
Claim 4
Dependent Claim
15 words
Method as claimed in claim 1 wherein the concentration of said additive is about 1%.
Claim 5
Dependent Claim
58 words
A cement composition consisting essentially of cement and from about 0.05 to about 5% by weight, basis cement, of a cement friction reducing additive consisting of hydrolyzed cereal solids which is comprised of from about 15% to about 25% by weight di-saccharides, tri-saccharides, tetra-saccharides, and penta-saccharides, and from about 75 to about 85% by weight hexa-saccharides and above.
Claim 6
Dependent Claim
58 words
A cement composition consisting essentially of cement and from about 0.05 to about 5% by weight, basis cement, of a cement friction reducing additive consisting of hydrolyzed cereal solids which is comprised of from about 15% to about 25% by weight di-saccharides, tri-saccharides, tetra-saccharides, and penta-saccharides, and from about 75 to about 85% by weight hexa-saccharides and above.
Claim 7
Dependent Claim
19 words
Composition as claimed in claim 4 wherein the concentration of said additive is from about 0.5 to about 2%.
Claim 8
Dependent Claim
15 words
Composition as claimed in claim 4 wherein the concentration of said additive is about 1%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |