Patent US4436636A successfully refreshed from Google Patents.
US4436636A
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Invert emulsion well servicing fluids
Assignee: Baroid Technology Inc
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Filing: 1981-12-21
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Granted: 1984-03-13
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Expires: 2001-12-21
Abstract
Abstract An invert emulsion well servicing fluid containing an oleaginous phase, an aqueous phase, an invert emulsifier and an effective amount of a solid, particulate polyolefin having a density of about 0.90 gms/cc or greater.
Inventors
- 👤 William M. Carnicom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:33
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; C09K8/36; C09K8/60; C09K8/62; C09K8/64; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/925
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
An invert emulsion well servicing fluid consisting essentially of: a liquid hydrocarbon oleaginous phase, an aqueous phase, the volume ratio of said oleaginous phase to said aqueous phase being from about 99/1 to about 1/1, an invert emulsifying agent, from about 1 to about 20 ppb of said fluid of a finely divided, solid, particulate, linear, high density polyethylene having an average particle diameter of from about 15 to about 40 microns, said particles being generally spherically shaped, said polyethylene having a density of at least about 0.94 g/cc, and from about 0.5 to about 4 ppb of said fluid of an organophilic clay.
Claim 2
Dependent Claim
104 words
An invert emulsion well servicing fluid consisting essentially of: a liquid hydrocarbon oleaginous phase, an aqueous phase, the volume ratio of said oleaginous phase to said aqueous phase being from about 99/1 to about 1/1, an invert emulsifying agent, from about 1 to about 20 ppb of said fluid of a finely divided, solid, particulate, linear, high density polyethylene having an average particle diameter of from about 15 to about 40 microns, said particles being generally spherically shaped, said polyethylene having a density of at least about 0.94 g/cc, and from about 0.5 to about 4 ppb of said fluid of an organophilic clay.
Claim 3
Dependent Claim
26 words
The well servicing fluid of claim 1 wherein the volume ratio of said oleaginous phase to said aqueous phase is from about 10:1 to about 2:1.
Claim 4
Dependent Claim
14 words
The well servicing fluid of claim 1 comprising, in addition, a filtration control agent.
Claim 5
Dependent Claim
51 words
The well servicing fluid of claim 1 wherein said oleaginous phase comprises a hydrocarbon oil, at least a part of which boils above 400° F. and which is selected from the class consisting of topped crude oil, gas oil, kerosene, diesel fuel, heavy alkylate, fractions of heavy alkylate, and mixtures thereof.
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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) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |