Patent US4141840A successfully refreshed from Google Patents.
US4141840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids containing polyethoxylated, sulfurized fatty alcohols
Assignee: Texaco Inc
•
Filing: 1977-11-17
•
Granted: 1979-02-27
•
Expires: 1997-11-17
Abstract
Abstract Aqueous drilling fluids containing polyethoxylated sulfurized fatty alcohols. Such fluids are especially useful where reduced torque drilling fluids are needed. Another embodiment of this invention relates to a method of drilling utilizing the above-described fluids.
Inventors
- 👤 Thad O. Walker
- 👤 Kenneth W. Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:20
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
An aqueous drilling fluid consisting essentially of an aqueous phase containing clay solids dispersed therein by a ferrochrome lignosulfonate dispersant and containing a water soluble polyethoxylated sulfurized unsaturated fatty alcohol containing from about 16 to about 18 carbon atoms therein and wherein the number of ethylene oxide groups therein is on an average of from about 20 to about 25 and wherein the sulfur content is from about 4 to about 6% by weight, basis ethoxylated fatty alcohol moiety, said fatty alcohol being present in said drilling fluid in an amount of from about 0.5 to about 5 pounds per barrel and being effective to improve the lubricity of said drilling fluid without impairing its drilling fluid properties.
Claim 2
Dependent Claim
118 words
An aqueous drilling fluid consisting essentially of an aqueous phase containing clay solids dispersed therein by a ferrochrome lignosulfonate dispersant and containing a water soluble polyethoxylated sulfurized unsaturated fatty alcohol containing from about 16 to about 18 carbon atoms therein and wherein the number of ethylene oxide groups therein is on an average of from about 20 to about 25 and wherein the sulfur content is from about 4 to about 6% by weight, basis ethoxylated fatty alcohol moiety, said fatty alcohol being present in said drilling fluid in an amount of from about 0.5 to about 5 pounds per barrel and being effective to improve the lubricity of said drilling fluid without impairing its drilling fluid properties.
Claim 3
Dependent Claim
33 words
An aqueous drilling fluid as claimed in claim 1 wherein said polyethoxylated sulfurized fatty alcohol is present in said aqueous phase in an amount of from about 1 to 3 pounds per barrel.
Claim 4
Dependent Claim
18 words
An aqueous drilling fluid as claimed in claim 1 wherein said polyethoxylated sulfurized fatty alcohol is oleyl alcohol.
Claim 5
Dependent Claim
148 words
In a method of drilling wells wherein a drilling fluid is circulated in the well in contact with an earth formation during the drilling operation, the improvement which comprises contacting said earth formation with an aqueous drilling fluid consisting essentially of an aqueous phase containing clay solids dispersed therein by a ferrochrome lignosulfonate dispersant and containing a water soluble polyethyoxylated sulfurized unsaturated fatty alcohol containing from about 16 to about 18 carbon atoms therein and wherein the number of ethylene oxide groups therein is on an average of from about 20 to about 25 and wherein the sulfur content is from about 4 to about 6%, by weight, basis ethoxylated fatty alcohol moiety, said fatty alcohol being present in an amount of from about 0.5 to about 5 pounds per barrel and being effective to improve the lubricity of said drilling fluid without impairing the drilling fluid properties.
Claim 6
Dependent Claim
148 words
In a method of drilling wells wherein a drilling fluid is circulated in the well in contact with an earth formation during the drilling operation, the improvement which comprises contacting said earth formation with an aqueous drilling fluid consisting essentially of an aqueous phase containing clay solids dispersed therein by a ferrochrome lignosulfonate dispersant and containing a water soluble polyethyoxylated sulfurized unsaturated fatty alcohol containing from about 16 to about 18 carbon atoms therein and wherein the number of ethylene oxide groups therein is on an average of from about 20 to about 25 and wherein the sulfur content is from about 4 to about 6%, by weight, basis ethoxylated fatty alcohol moiety, said fatty alcohol being present in an amount of from about 0.5 to about 5 pounds per barrel and being effective to improve the lubricity of said drilling fluid without impairing the drilling fluid properties.
Claim 7
Dependent Claim
31 words
A method as claimed in claim 4 wherein said polyethoxylated sulfurized fatty alcohol is present in said aqueous phase in an amount of from about 1 to 3 pounds per barrel.
Claim 8
Dependent Claim
14 words
A method as claimed in claim 4 wherein said fatty alcohol is oleyl alcohol.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |