Patent US4024918A successfully refreshed from Google Patents.
US4024918A
Expired / Lapsed
US
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Method of cementing a well
Assignee: Schlumberger Technology Corp
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Filing: 1975-06-23
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Granted: 1977-05-24
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Expires: 1995-06-23
Abstract
Abstract A hydraulic cement slurry is disclosed comprising as parts by weight, a hydraulic cement; from 35 to about 65 parts of water per 100 parts of hydraulic cement and a sufficient quantity of both; polyethylene oxide and an alkali metal salt of the condensation product of mononaphthalene sulfonic acid and formaldehyde to reduce the loss of fluid from the cement slurry. A method of cementing locations in a subterranean geologic formation penetrated by a borehole is also disclosed.
Inventors
- 👤 Oliver W. Crinkelmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:47
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C09K8/467; C09K8/487; C04B2103/00; C04B2103/46
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A method of cementing in a borehole penetrating a subterranean foundation which comprises: emplacing in an area within said borehole to be cemented a hydraulic cement slurry which comprises, a hydraulic cement and based on 100 parts by weight of said cement; water, from about 35 to about 65 parts; from about 0.6 to about 2 parts of polyethylene oxide having a molecular weight of at least about 300,000 and from about 0.5 to about 2.5 parts of an alkali metal salt of the condensation product of mononaphthalene sulfonic acid and formaldehyde.
Claim 2
Independent Claim
92 words
A method of cementing in a borehole penetrating a subterranean foundation which comprises: emplacing in an area within said borehole to be cemented a hydraulic cement slurry which comprises, a hydraulic cement and based on 100 parts by weight of said cement; water, from about 35 to about 65 parts; from about 0.6 to about 2 parts of polyethylene oxide having a molecular weight of at least about 300,000 and from about 0.5 to about 2.5 parts of an alkali metal salt of the condensation product of mononaphthalene sulfonic acid and formaldehyde.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the alkali metal is sodium or lithium.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein the temperature of the cement slurry is maintained at less than about 150° F.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the alkali metal is lithium or sodium.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein the temperature of the cement slurry is maintained at less than about 150° F.
References Cited (Backward Citations)
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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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |