US3962099A
Expired / Lapsed
US
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Water base drilling mud composition
Assignee: ConocoPhillips Co
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Filing: 1974-04-29
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Granted: 1976-06-08
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Expires: 1994-04-29
Abstract
Abstract An improved water base drilling mud composition wherein calcium ions are controlled and converted to water-insoluble plant nutrient compounds by the use of monocalcium phosphate compounds, said composition comprising an aqueous suspension containing from about 5 to 35 pounds per barrel of a clay material, from about 1 to 5 pounds per barrel of an alkaline earth metal hydroxide selected from the group consisting of calcium hydroxide and mixtures of calcium hydroxide and barium hydroxide, and at least a stoichiometric amount, based on the weight of said alkaline earth metal hydroxide of said monocalcium phosphate containing compound.
Inventors
- 👤 Donald L. Whitfill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:47
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/05; C09K8/14; C09K8/145
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
An improved water base drilling mud composition consisting essentially of an aqueous suspension of: a. from about 5 to 35 pounds per barrel of a clay material; b. from about 1 to 5 pounds per barrel of an alkaline earth metal hydroxide selected from the group consisting of calcium hydroxide and mixtures of calcium hydroxide and barium hydroxide; and c. at least a stoichiometric amount, based on the weight of said alkaline earth metal hydroxide, of monocalcium phosphate.
Claim 2
Dependent Claim
78 words
An improved water base drilling mud composition consisting essentially of an aqueous suspension of: a. from about 5 to 35 pounds per barrel of a clay material; b. from about 1 to 5 pounds per barrel of an alkaline earth metal hydroxide selected from the group consisting of calcium hydroxide and mixtures of calcium hydroxide and barium hydroxide; and c. at least a stoichiometric amount, based on the weight of said alkaline earth metal hydroxide, of monocalcium phosphate.
Claim 3
Dependent Claim
24 words
The drilling mud composition of claim 1 wherein said clay material is present in an amount of about 10 to 25 pounds per barrel.
Claim 4
Dependent Claim
22 words
The drilling mud composition of claim 1 which includes from about 1 to 20 pounds per barrel of a mud thinner constituent.
Claim 5
Dependent Claim
24 words
The drilling mud composition of claim 3 wherein said mud thinner constituent is selected from the group consisting of ferrochrome lignosulfonates, lignins, and tannins.
Claim 6
Dependent Claim
22 words
The drilling mud composition of claim 1 which includes from about 1 to 20 pounds per barrel of a fluid loss additive.
Claim 7
Dependent Claim
46 words
The drilling mud composition of claim 5 wherein said fluid loss additive is present in an amount of from about 1 to 5 pounds per barrel and said additive is selected from the group consisting of starch, caustic treated starch, carboxymethyl cellulose, and mixtures of same.
Claim 8
Dependent Claim
62 words
The drilling mud composition of claim 1 wherein said clay material is prehydrated bentonite; said alkaline earth metal hydroxide constituent is selected from the group consisting of Ca(OH) 2 and mixtures of Ca(OH) 2 and other alkaline earth metal hydroxides; and, said monocalcium phosphate is present in a weight ratio with said alkaline earth metal hydroxide of from about 1:1 to 5:1.
Claim 9
Dependent Claim
55 words
The drilling mud composition of claim 7 wherein said prehydrated bentonite is present in an amount of about 15 pounds per barrel; said alkaline earth metal hydroxide is a mixture containing about 2.4 pounds per barrel of Ca(OH) 2 ; and, said monocalcium phosphate is present in an amount of about 5 pounds per barrel.
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |