Patent US3265629A successfully refreshed from Google Patents.
US4428843A
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US
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Well working compositions, method of decreasing the seepage loss from such compositions, and additive therefor
Assignee: VENTURE CHEMICALS Inc 106 BOARD ROAD LAFAYETTE LOUISIANA 70508 A TX CORP
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Filing: 1981-06-01
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Granted: 1984-01-31
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Expires: 2001-06-01
Abstract
Abstract The invention provides well-working fluid compositions containing certain hydrophobic organophilic water wettable fibrous materials to decrease the seepage loss of the fluid to subterranean formations in which the fluid is being used. Also disclosed is a process of reducing the seepage loss of well working fluids utilizing such fibrous materials.
Inventors
- 👤 Jack C. Cowan
- 👤 Tommy Thrash
- 👤 Jerry R. Rayborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035; Y; Y10; Y10S; Y10S507/00; Y10S507/91; Y10S507/925
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
An oil base well-working fluid comprising a major proportion of oil and a minor proportion but sufficient to substantially lower the seepage loss of a hydrophobic, organophilic, water wettable fibrous material comprising cotton which has been treated to be hydrophobic and organophilic, said fibrous material having a particle size such that at least 90% by weight thereof present in a water suspension will pass through a 100 mesh screen.
Claim 2
Dependent Claim
69 words
An oil base well-working fluid comprising a major proportion of oil and a minor proportion but sufficient to substantially lower the seepage loss of a hydrophobic, organophilic, water wettable fibrous material comprising cotton which has been treated to be hydrophobic and organophilic, said fibrous material having a particle size such that at least 90% by weight thereof present in a water suspension will pass through a 100 mesh screen.
Claim 3
Dependent Claim
27 words
The fluid of claim 1 wherein the amount of said fibrous material is from about 2 to about 50 pounds per 42 gallon barrel of said fluid.
Claim 4
Dependent Claim
11 words
The fluid of claim 1 which contains a fluid loss additive.
Claim 5
Dependent Claim
24 words
The fluid of claim 3 wherein said fluid loss additive is selected from the group consisting of asphaltic materials, organophilic humates, and organophilic lignosulfonates.
Claim 6
Dependent Claim
69 words
A water base well-working fluid comprising a major proportion of water and a minor proportion but sufficient to substantially lower the seepage loss of a hydrophobic, organophilic, water wettable fibrous material comprising cotton which has been treated to be hydrophobic and organophilic, said fibrous material having a particle size such that at least 90% by weight thereof present in a water suspension will pass through a 100 mesh screen.
Claim 7
Dependent Claim
69 words
A water base well-working fluid comprising a major proportion of water and a minor proportion but sufficient to substantially lower the seepage loss of a hydrophobic, organophilic, water wettable fibrous material comprising cotton which has been treated to be hydrophobic and organophilic, said fibrous material having a particle size such that at least 90% by weight thereof present in a water suspension will pass through a 100 mesh screen.
Claim 8
Dependent Claim
27 words
The fluid of claim 5 wherein the amount of said fibrous material is from about 2 to about 50 pounds per 42 gallon barrel of said fluid.
Claim 9
Dependent Claim
11 words
The fluid of claim 5 which contains a fluid loss additive.
Claim 10
Dependent Claim
24 words
The fluid of claim 7 wherein said fluid loss additive is selected from the group consisting of starch, carboxymethyl cellulose, carboxymethyl starch, and polyacrylates.
Claim 11
Dependent Claim
94 words
In a process of drilling a well wherein there is circulated in the well a drilling fluid subject to seepage loss into permeable formations penetrated by the well, the method of decreasing the seepage loss to said formations which comprises admixing with said drilling fluid an effective amount of a hydrophobic, organophilic, water wettable fibrous material comprising cotton which has been treated to be hydrophobic and organophilic, said fibrous material having a particle size such that at least 90% by weight thereof present in a water suspension will pass through a 100 mesh screen.
Claim 12
Dependent Claim
94 words
In a process of drilling a well wherein there is circulated in the well a drilling fluid subject to seepage loss into permeable formations penetrated by the well, the method of decreasing the seepage loss to said formations which comprises admixing with said drilling fluid an effective amount of a hydrophobic, organophilic, water wettable fibrous material comprising cotton which has been treated to be hydrophobic and organophilic, said fibrous material having a particle size such that at least 90% by weight thereof present in a water suspension will pass through a 100 mesh screen.
Claim 13
Dependent Claim
28 words
The process of claim 9 wherein the amount of said fibrous material is from about 2 to about 50 pounds per 42 gallon barrel of said drilling fluid.
Claim 14
Dependent Claim
28 words
The process of claim 9, or 10, wherein said drilling fluid is a water base drilling fluid which contains up to about 20 ppb. of a liquid hydrocarbon.
Claim 15
Dependent Claim
20 words
The process of claim 9 wherein said drilling fluid is an oil base fluid which contains a fluid loss additive.
Claim 16
Dependent Claim
20 words
The process of claim 9 wherein said drilling fluid is a water base fluid which contains a fluid loss additive.
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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) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |