US3816148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and process for strengthening and sealing geological formations and strata in mining and deep drilling
Assignee: Hughes Tool Co
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Filing: 1972-07-12
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Granted: 1974-06-11
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Expires: 1992-07-12
Abstract
Abstract Geological formations and strata are strengthened, solidified, and sealed in mining and deep drilling by means of a Sorel cement mixture containing a small amount of a water soluble ammonium salt such as ammonium chloride. A small amount of an aminoplast may be added. The magnesium oxide component of the Sorel cement may have admixed thereto magnesia usta.
Inventors
- 👤 H Barthel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:42
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/30; C04B28/32; E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
16 words
The composition as defined by claim 1, wherein said water soluble ammonium salt is ammonium chloride.
Claim 2
Dependent Claim
24 words
The composition as defined by claim 1, wherein the aminoplast is selected from the group consisting of urea-formaldehyde resins, melamine-formaldehyde resins and urea-melamine-formaldehyde resins.
Claim 3
Dependent Claim
14 words
The composition as defined by claim 3, wherein said aminoplast is a urea-formaldehyde resin.
Claim 4
Dependent Claim
43 words
The composition as defined by claim 1, consisting essentially of about 60 parts of magnesium oxide, about 30 parts of an aqueous magnesium chloride solution (specific gravity: 1.3), about 10 parts of ammonium chloride, and about 10 parts of an incompletely condensed aminoplast.
Claim 5
Dependent Claim
71 words
A composition for strengthening, solidifying, and sealing geological formations and strata in mining and deep drilling, said composition having a specific gravity between about 1.25 and 2.2 kg./l. and comprising a Sorel cement composition having admixed therewith between about 3 and 10 percent of a water soluble ammonium salt and from about 30 to about 70 percent of magnesia usta based upon the total magnesium oxide content of the Sorel cement.
Claim 6
Dependent Claim
42 words
The composition as defined by claim 6, consisting essentially of about 900 parts of magnesium chloride MgCl2.6 H2O, about 900 parts of water, about 150 parts of magnesium oxide, about 180 parts of magnesia usta, and about 80 parts of ammonium chloride.
Claim 7
Dependent Claim
42 words
The composition as defined by claim 6, consisting essentially of about 900 parts of magnesium chloride MgCl2.6 H2O, about 900 parts of water, about 200 parts of magnesium oxide, about 95 parts of magnesia usta, and about 60 parts of ammonium chloride.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |