Patent US3990903A successfully refreshed from Google Patents.
US3990903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrothermal cement and method of cementing well bores
Assignee: Southwest Research Institute
•
Filing: 1975-04-16
•
Granted: 1976-11-09
•
Expires: 1995-04-16
Abstract
Abstract A hydrothermal cement composition consisting essentially of (a) a polyvalent metal ion source, (b) water, and (c) a hydratable silica source wherein the silica becomes available for chemical combination with the polyvalent metal salt upon application of heat. A method of cementing a string of pipe in a bore hole including the steps of preparing such a cement composition, pumping the cement composition into the annular space between the string of pipe and the walls of the bore hole, and allowing the cement to set due to the temperature of the bore hole or by passage of time or both.
Inventors
- 👤 William A. Mallow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:41
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C04; C04B; C04B28/00; C04B28/18; C04B28/184; C04B28/24; C04B28/26; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
117 words
A cement composition characterized as a pumpable slurry susceptible to a hydrothermally initiated cure, consisting essentially of a. from about 5 to about 15 parts by weight of a polyvalent metal ion source, b. from about 15 to about 20 parts by weight of water per hundred parts by weight of total solids, c. from about 60 to about 100 parts by weight of a silica source hydratable under time and temperature conditions through reactions wherein the silica becomes available for chemical combination with the polyvalent metal ion source (a) upon application of heat, and d. from about 5 to 15 parts by weight of a water reducing reagent comprising a spray dried sodium silicate hydrate powder.
Claim 2
Dependent Claim
117 words
A cement composition characterized as a pumpable slurry susceptible to a hydrothermally initiated cure, consisting essentially of a. from about 5 to about 15 parts by weight of a polyvalent metal ion source, b. from about 15 to about 20 parts by weight of water per hundred parts by weight of total solids, c. from about 60 to about 100 parts by weight of a silica source hydratable under time and temperature conditions through reactions wherein the silica becomes available for chemical combination with the polyvalent metal ion source (a) upon application of heat, and d. from about 5 to 15 parts by weight of a water reducing reagent comprising a spray dried sodium silicate hydrate powder.
Claim 3
Dependent Claim
96 words
The cement composition of claim 1 wherein, more specifically, a. the polyvalent metal ion source consists of about 7 parts by weight of zinc oxide, b. water is present in the amount of about 17 parts by weight per hundred parts by weight of total solids, c. the silica source includes, i. about 50 parts by weight sand, ii. about 25 parts by weight silica flour, iii. about 10 parts by weight anhydrous sodium silicate powder, and d. the water reducing reagent consists of about 10 parts by weight of spray dried hydrated sodium silicate powder.
Claim 4
Dependent Claim
16 words
The cement composition of claim 1 including additionally up to about 25 parts by weight flyash.
Claim 5
Dependent Claim
99 words
The cement composition of claim 1 wherein, more specifically, a. the polyvalent metal ion source consists of about 7 parts by weight of reagent grade aluminum hydroxide, b. water is present in the amount of about 17 parts by weight per hundred parts by weight of total solids, and c. the silica source includes, i. about 50 parts by weight sand, ii. about 25 parts by weight silica flour, iii. about 10 parts by weight anhydrous sodium silicate powder, and d. the water reducing reagent consists of about 10 parts by weight of spray dried hydrated sodium silicate powder.
Claim 6
Dependent Claim
91 words
The cement composition of claim 1 wherein, more specifically, a. the polyvalent metal ion source consists of about 7 parts by weight of commercial grade aluminum hydroxide, b. water is present in the amount of about 20 parts by weight, and c. the silica source includes, i. about 50 parts by weight sand, ii. about 25 parts by weight silica flour, iii. about 10 parts by weight anhydrous sodium silicate powder, and d. the water reducing reagent consists of about 10 parts by weight of spray dried hydrated sodium silicate powder.
Claim 7
Dependent Claim
95 words
The cement composition of claim 1 wherein, more specifically, a. the polyvalent metal ion source consists of about 7 parts by weight aluminum oxide, b. water is present in the amount of about 17 parts by weight per hundred parts by weight of total solids, c. the silica source includes, i. about 50 parts by weight sand, ii. about 25 parts by weight silica flour, iii. about 10 parts by weight anhydrous sodium silicate powder, and d. the water reducing reagent consists of about 10 parts by weight of spray dried hydrated sodium silicate powder.
Claim 8
Dependent Claim
132 words
A cement composition characterized as a pumpable slurry susceptible to a hydrothermally initiated cure, consisting essentially of, a. from about 5 to about 15 parts by weight of a polyvalent metal ion source, b. from about 15 to about 20 parts by weight of water per hundred parts by weight of total solids, c. a silica source hydratable under time and temperature conditions through reactions wherein the silica becomes available for chemical combination with the polyvalent metal ion source (a) upon application of heat, the silica source comprising, i. from about 40 to about 60 parts by weight of sand, ii. from about 20 to about 40 parts by weight of silica flour, and d. from about one to about 10 parts by weight of sodium hydroxide as a sodium silicate precursor.
Claim 9
Dependent Claim
132 words
A cement composition characterized as a pumpable slurry susceptible to a hydrothermally initiated cure, consisting essentially of, a. from about 5 to about 15 parts by weight of a polyvalent metal ion source, b. from about 15 to about 20 parts by weight of water per hundred parts by weight of total solids, c. a silica source hydratable under time and temperature conditions through reactions wherein the silica becomes available for chemical combination with the polyvalent metal ion source (a) upon application of heat, the silica source comprising, i. from about 40 to about 60 parts by weight of sand, ii. from about 20 to about 40 parts by weight of silica flour, and d. from about one to about 10 parts by weight of sodium hydroxide as a sodium silicate precursor.
Claim 10
Dependent Claim
24 words
The cement composition of claim 7 wherein, more specifically, th sodium hydroxide (d) is present in an amount of about 5 parts by weight.
Claim 11
Independent Claim
135 words
A method of cementing a string of pipe in a bore hole, comprising the steps of, 1. preparing a cement composition as a pumpable slurry susceptible of a hydrothermally initiated cure, consisting essentially of a. from about 5 to about 15 parts by weight of a polyvalent metal ion source, b. from about 15 to about 20 parts by weight of water per hundred parts by weight of total solids, c. from about 60 to about 100 parts by weight of a silica source hydratable under time and temperature conditions through reactions wherein the silica becomes available for chemical combination with the polyvalent metal ion source (a) upon application of heat, and d. from about 5 to about 15 parts by weight of a water reducing reagent comprising a spray dried sodium silicate hydrate powder,
Claim 12
Independent Claim
135 words
A method of cementing a string of pipe in a bore hole, comprising the steps of, 1. preparing a cement composition as a pumpable slurry susceptible of a hydrothermally initiated cure, consisting essentially of a. from about 5 to about 15 parts by weight of a polyvalent metal ion source, b. from about 15 to about 20 parts by weight of water per hundred parts by weight of total solids, c. from about 60 to about 100 parts by weight of a silica source hydratable under time and temperature conditions through reactions wherein the silica becomes available for chemical combination with the polyvalent metal ion source (a) upon application of heat, and d. from about 5 to about 15 parts by weight of a water reducing reagent comprising a spray dried sodium silicate hydrate powder,
Claim 13
Dependent Claim
42 words
pumping the cement composition into an annular space between the string of pipe and the walls of the bore hole, and 3. allowing the cement to set due to the temperature of the bore hole or by passage of time or both.
Claim 14
Dependent Claim
42 words
pumping the cement composition into an annular space between the string of pipe and the walls of the bore hole, and 3. allowing the cement to set due to the temperature of the bore hole or by passage of time or both.
Claim 15
Dependent Claim
95 words
The method of claim 1 wherein, more specifically, a. the polyvalent metal ion source consists of about 7 parts by weight of zinc oxide, b. water is present in the amount of about 17 parts by weight per hundred parts by weight of total solids, c. the silica source includes, i. about 50 parts by weight sand, ii. about 25 parts by weight silica flour, iii. about 10 parts by weight anhydrous sodium silicate powder, and d. the water reducing reagent consists of about 10 parts by weight of spray dried hydrated sodium silicate powder.
Claim 16
Dependent Claim
15 words
The method of claim 9 including, additionally, up to about 25 parts by weight flyash.
Claim 17
Dependent Claim
97 words
The method of claim 9 wherein, more specifically, a. the polyvalent metal ion source consists of about 7 parts by weight of reagent grade aluminum hydroxide, b. water is present in the amount of about 17 parts by weight per hundred parts by weight of total solids, c. the silica source includes, i. about 50 parts by weight sand, ii. about 25 parts by weight silica flour, iii. about 10 parts by weight anhydrous sodium silicate powder, and d. the water reducing reagent consists of about 10 parts by weight of spray dried hydrated sodium silicate powder.
Claim 18
Dependent Claim
97 words
The method of claim 9 wherein, more specifically, a. the polyvalent metal ion source consists of about 10 parts by weight of commercial grade aluminum hydroxide, b. water is present in the amount of about 17 parts by weight per hundred parts by weight of total solids, c. the silica source includes, i. about 50 parts by weight sand, ii. about 25 parts by weight silica flour, iii. about 10 parts by weight anhydrous sodium silicate powder, and d. the water reducing reagent consists of about 10 parts by weight of spray dried hydrated sodium silicate powder.
Claim 19
Dependent Claim
94 words
The method of claim 9 wherein, more specifically, a. The polyvalent metal ion source consists of about 7 parts by weight aluminum oxide, b. water is present in the amount of about 17 parts by weight per hundred parts by weight of total solids, c. the silica source includes, i. about 50 parts by weight sand, ii. about 25 parts by weight silica flour, iii. about 10 parts by weight anhydrous sodium silicate powder, and d. the water reducing reagent consists of about 10 parts by weight of sprayed dried hydrated sodium silicate powder.
Claim 20
Dependent Claim
122 words
The method of claim 9, consisting essentially of a. from about 5 to about 15 parts by weight of a polyvalent metal ion source, b. from about 15 to about 20 parts by weight of water per hundred parts by weight of total solids, c. a silica source hydratable under time and temperature conditions through reactions wherein the silica becomes available for chemical combination with the polyvalent metal salt (a) upon application of heat, the silica source comprising, i. from about 40 to about 60 parts by weight of sand, ii. from about 20 to about 40 parts by weight of silica flour, and d. from about 1 to about 10 parts by weight of sodium hydroxide as a sodium silicate precursor.
Claim 21
Dependent Claim
23 words
The method of claim 15 wherein, more specifically, the sodium hydroxide (d) is present in an amount of about 5 parts by weight.
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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |