US4292183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-density fluid compositions
Assignee: Great Lakes Chemical Corp
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Filing: 1978-12-13
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Granted: 1981-09-29
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Expires: 1998-12-13
Abstract
Abstract Clear, high-density fluids suitable for use as well completion, packing, and perforation media comprise aqueous solutions of zinc bromide and calcium bromide having densities lying in the range of about 14.5 up to about 18.0 pounds per gallon and measured pH's lying in the range of about 3.5 up to about 6.0. Optionally, such fluids may also comprise calcium chloride and/or a soluble film-forming amine-based corrosion inhibitor. Such fluids under conditions of ordinary use exhibit low corrosion rates and have crystallization points lying well below the range of temperatures under which they are used.
Inventors
- 👤 David C. Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:22
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; Y; Y10; Y10S; Y10S507/00; Y10S507/925; Y10S507/926
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
59 words
A clear, high-density fluid adapted for use as a well completion, packing, and perforation medium consisting of a solution of zinc bromide and calcium bromide in water having a density lying in the range of about 14.5 up to about 18.0 pounds per gallon and a measured pH lying in the range of about 3.5 up to about 6.0;
Claim 2
Dependent Claim
59 words
A clear, high-density fluid adapted for use as a well completion, packing, and perforation medium consisting of a solution of zinc bromide and calcium bromide in water having a density lying in the range of about 14.5 up to about 18.0 pounds per gallon and a measured pH lying in the range of about 3.5 up to about 6.0;
Claim 3
Dependent Claim
20 words
A clear, high-density fluid, as claimed in claim 1, having a measured pH of about 4.0 up to about 6.0.
Claim 4
Dependent Claim
20 words
A clear, high-density fluid, as claimed in claim 1, having a density of about 15.1 to 17.0 pounds per gallon.
Claim 5
Dependent Claim
62 words
A clear, high-density fluid adapted for use as a well completion, packing, and perforation medium consisting of a solution of zinc bromide, calcium bromide and calcium chloride in water having a density lying in the range of about 15.1 up to about 18.0 pounds per gallon and having a measured pH lying in the range of about 4.0 up to about 6.0.
Claim 6
Dependent Claim
62 words
A clear, high-density fluid adapted for use as a well completion, packing, and perforation medium consisting of a solution of zinc bromide, calcium bromide and calcium chloride in water having a density lying in the range of about 15.1 up to about 18.0 pounds per gallon and having a measured pH lying in the range of about 4.0 up to about 6.0.
Claim 7
Dependent Claim
65 words
A clear, high-density fluid adapted for use as a well completion, packing, and perforation medium comprising: a solution of zinc bromide and calcium bromide in water having a density lying in the range of about 14.5 up to about 18.0 pounds per gallon and a measured pH lying in the range of about 3.5 up to about 6.0; and a soluble, film-forming amine-based corrosion inhibitor.
Claim 8
Dependent Claim
65 words
A clear, high-density fluid adapted for use as a well completion, packing, and perforation medium comprising: a solution of zinc bromide and calcium bromide in water having a density lying in the range of about 14.5 up to about 18.0 pounds per gallon and a measured pH lying in the range of about 3.5 up to about 6.0; and a soluble, film-forming amine-based corrosion inhibitor.
Claim 9
Dependent Claim
17 words
A clear, high density fluid, as claimed in claim 5, wherein the solution further comprises calcium chloride.
Claim 10
Dependent Claim
20 words
A clear, high-density fluid, as claimed in claim 5, having a measured pH of about 4.0 up to about 6.0.
Claim 11
Dependent Claim
20 words
A clear, high-density fluid, as claimed in claim 5, having a density of about 15.1 to 17.0 pounds per gallon.
Claim 12
Dependent Claim
28 words
A clear, high-density fluid, as claimed in claim 5, wherein the corrosion inhibitor is provided at a level of about 1000 up to about 5000 parts per million.
Claim 13
Dependent Claim
78 words
In a method of completion or workover of wells wherein a high-density fluid is injected into the well to exert sufficient hydrostatic pressure to control the well, the improvement comprising employing as the high-density fluid a clear solution comprising zinc bromide and calcium bromide in water having a density lying in the range of about 14.5 up to about 18.0 pounds per gallon and a measured pH lying in the range of about 3.5 up to about 6.0.
Claim 14
Dependent Claim
78 words
In a method of completion or workover of wells wherein a high-density fluid is injected into the well to exert sufficient hydrostatic pressure to control the well, the improvement comprising employing as the high-density fluid a clear solution comprising zinc bromide and calcium bromide in water having a density lying in the range of about 14.5 up to about 18.0 pounds per gallon and a measured pH lying in the range of about 3.5 up to about 6.0.
Claim 15
Dependent Claim
14 words
A method, as claimed in claim 10, wherein the solution further comprises calcium chloride.
Claim 16
Dependent Claim
34 words
A method, as claimed in claim 11, wherein the solution has a density lying in the range of about 15.1 up to 18.0 and a measured pH of about 4.0 up to about 6.0.
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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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |