US4461644A
Expired / Lapsed
US
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Light weight composition and a method of sealing a subterranean formation
Assignee: Halliburton Co
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Filing: 1983-04-29
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Granted: 1984-07-24
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Expires: 2003-04-29
Abstract
Abstract A light weight cement composition made from sea water and a method of sealing a subterranean formation utilizing the light weight cement composition. The light weight cement composition comprises a hydraulic cement, a silicate compound, sea water and a hydroxide compound. The method comprises introducing the light weight cement composition into the subterranean formation.
Inventors
- 👤 Jerry D. Childs
- 👤 Lance E. Brothers
- 👤 Joseph R. Murphey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:12
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04; C04B; C04B28/00; C04B28/24
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
152 words
A cement composition having a density of from about 11.0 to about 16.0 pounds and comprising: (a) a hydraulic cement; (b) a silicate compound selected from the group consisting of an aqueous alkali metal silicate, an aqueous ammonium silicate and mixtures thereof said compound being present in the range of from about 0.40 percent to about 3.40 percent by weight of hydraulic cement; (c) sea water present in the range of from about 42 percent to about 190 percent by weight of hydraulic cement; and (d) a hydroxide compound selected from the group consisting of an alkali metal hydroxide, ammonium hydroxide, calcium hydroxide, and mixtures thereof said hydroxide compound present in the range of from about 0.2 percent to about 2.0 percent by weight of the sea water; wherein said hydroxide compound is added to the sea water before the silicate compound and the hydraulic cement is added to the sea water.
Claim 2
Dependent Claim
152 words
A cement composition having a density of from about 11.0 to about 16.0 pounds and comprising: (a) a hydraulic cement; (b) a silicate compound selected from the group consisting of an aqueous alkali metal silicate, an aqueous ammonium silicate and mixtures thereof said compound being present in the range of from about 0.40 percent to about 3.40 percent by weight of hydraulic cement; (c) sea water present in the range of from about 42 percent to about 190 percent by weight of hydraulic cement; and (d) a hydroxide compound selected from the group consisting of an alkali metal hydroxide, ammonium hydroxide, calcium hydroxide, and mixtures thereof said hydroxide compound present in the range of from about 0.2 percent to about 2.0 percent by weight of the sea water; wherein said hydroxide compound is added to the sea water before the silicate compound and the hydraulic cement is added to the sea water.
Claim 3
Dependent Claim
15 words
The composition recited in claim 1 wherein said composition further comprises a cement set retarder.
Claim 4
Dependent Claim
52 words
The composition recited in claim 2 wherein said silicate is an alkali metal silicate and has a molar ratio of silicon dioxide to alkali metal oxide in the range of from about 1.5:2 to about 3.3:1 and the alkali metal is selected from the group consisting of potassium, sodium, and mixtures thereof.
Claim 5
Dependent Claim
23 words
The composition recited in claim 3 wherein said silicate has a molar ratio of silicon dioxide to alkali metal oxide of about 3.22:1.
Claim 6
Dependent Claim
33 words
The composition recited in claim 1 wherein a mixture of said silicate composition and said hydroxide compound is added to the sea water before the hydraulic cement is added to the sea water.
Claim 7
Dependent Claim
12 words
The composition recited in claim 3 wherein said hydroxide is sodium hydroxide.
Claim 8
Dependent Claim
14 words
The composition recited in claim 2 wherein said cement set retarder is sodium lignosulfonate.
Claim 9
Dependent Claim
23 words
The composition recited in claim 2 wherein the density of said cement composition is about 11.4 pounds to about 14.0 pounds per gallon.
Claim 10
Dependent Claim
28 words
The composition recited in claim 8 wherein said sea water is present in the range of about 73 percent to about 170 percent by weight of hydraulic cement.
Claim 11
Dependent Claim
42 words
The composition recited in claim 9 wherein said sodium hydroxide is present in an amount that raises the pH of the sea water to at least 12 and is at least stoichiometric to the amount of magnesium present in the sea water.
Claim 12
Independent Claim
170 words
A method of cementing a subterranean earth formation comprising: (I) introducing a cement composition having a density of from about 11 to about 16 pounds per gallon into said formation the cement composition comprising: (a) a hydraulic cement; (b) a silicate compound selected from the group consisting of an aqueous alkali metal silicate, an aqueous ammonium silicate and mixtures thereof said compound being present in the range of from about 0.40 percent to about 3.40 percent by weight of hydraulic cement; (c) sea water present in the range of from about 42 percent to about 190 percent by weight of hydraulic cement; and (d) a hydroxide compound selected from the group consisting of an alkali metal hydroxide, ammonium hydroxide, calcium hydroxide, and mixtures thereof said hydroxide compound present in the range of from about 0.2 percent to about 2.0 percent by weight of the sea water; wherein said hydroxide compound is added to the sea water before the silicate compound and the hydraulic cement is added to the sea water.
Claim 13
Independent Claim
170 words
A method of cementing a subterranean earth formation comprising: (I) introducing a cement composition having a density of from about 11 to about 16 pounds per gallon into said formation the cement composition comprising: (a) a hydraulic cement; (b) a silicate compound selected from the group consisting of an aqueous alkali metal silicate, an aqueous ammonium silicate and mixtures thereof said compound being present in the range of from about 0.40 percent to about 3.40 percent by weight of hydraulic cement; (c) sea water present in the range of from about 42 percent to about 190 percent by weight of hydraulic cement; and (d) a hydroxide compound selected from the group consisting of an alkali metal hydroxide, ammonium hydroxide, calcium hydroxide, and mixtures thereof said hydroxide compound present in the range of from about 0.2 percent to about 2.0 percent by weight of the sea water; wherein said hydroxide compound is added to the sea water before the silicate compound and the hydraulic cement is added to the sea water.
Claim 14
Dependent Claim
15 words
The method recited in claim 11 wherein said composition further comprises a cement set retarder.
Claim 15
Dependent Claim
52 words
The method recited in claim 12 wherein said silicate is an alkali metal silicate and has a molar ratio of silicon dioxide to alkali metal oxide in the range of from about 1.5:2 to about 3.3:1 and the alkali metal is selected from the group consisting of potassium, sodium, and mixtures thereof.
Claim 16
Dependent Claim
23 words
The method recited in claim 13 wherein said silicate has a molar ratio of silicon dioxide to alkali metal oxide of about 3.22:1.
Claim 17
Dependent Claim
16 words
The method recited in claim 13 wherein said hydraulic cement is API Class G Portland cement.
Claim 18
Dependent Claim
12 words
The method recited in claim 13 wherein said hydroxide is sodium hydroxide.
Claim 19
Dependent Claim
12 words
The method recited in claim 12 wherein said retarder is sodium lignosulfonate.
Claim 20
Dependent Claim
22 words
The method recited in claim 12 wherein the density of said cement composition is about 11.4 to about 14 pounds per gallon.
Claim 21
Dependent Claim
28 words
The method recited in claim 18 wherein said sea water is present in the range of about 73 percent to about 170 percent by weight of hydraulic cement.
Claim 22
Dependent Claim
42 words
The method recited in claim 19 wherein said sodium hydroxide is present in an amount that raises the pH of the sea water to at least 12 and is at least stoichiometric to the amount of magnesium present in the sea water.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |