Patent US3666010A successfully refreshed from Google Patents.
US3666010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packer sleeves
Assignee: Halliburton Co
•
Filing: 1970-06-11
•
Granted: 1972-05-30
•
Expires: 1990-06-11
Abstract
Abstract This invention relates to resilient packer sleeves which when expanded laterally in a well, provides a seal separating the well into the isolated sections.
Inventors
- 👤 Allen E Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:24
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/128; E21B33/1208
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
In a packer of the type having a mandrel, expandable sliptype anchors on the mandrel, a plurality of sleeves slidably mounted coaxially on the mandrel, and two inclined means for expanding the slips and sleeves against the well casing, the improvement comprising: a. a resilient inner sleeve, adapted to be expandable outwardly; and b. two resilient, outer sleeves adapted to sealingly engage said casing, each of said outer sleeves having one end positioned adjacent one of said inclined means and a second end having a concave surface positioned adjacent to and partially enveloping said inner sleeve thereby preventing said inner sleeve from engaging said casing.
Claim 2
Dependent Claim
105 words
In a packer of the type having a mandrel, expandable sliptype anchors on the mandrel, a plurality of sleeves slidably mounted coaxially on the mandrel, and two inclined means for expanding the slips and sleeves against the well casing, the improvement comprising: a. a resilient inner sleeve, adapted to be expandable outwardly; and b. two resilient, outer sleeves adapted to sealingly engage said casing, each of said outer sleeves having one end positioned adjacent one of said inclined means and a second end having a concave surface positioned adjacent to and partially enveloping said inner sleeve thereby preventing said inner sleeve from engaging said casing.
Claim 3
Dependent Claim
19 words
The improvement of claim 1 wherein said inner sleeve is a sealed resilient container filled with a noncompressible fluid.
Claim 4
Dependent Claim
13 words
The improvement of claim 2 wherein said noncompressible fluid is a silicon-based grease.
Claim 5
Dependent Claim
114 words
In a packer of the type having a mandrel, expandable slip-type anchors, resilient sleeves slidably mounted coaxially on the mandrel and inclined means for expanding the slips and sleeves outwardly against oil well casing, the improvement comprising: a. an inner sleeve having an annular fold-guiding recess in its inner wall, said inner sleeve adapted to be expanded outwardly away from said mandrel; and b. an outer sleeve, having a higher durometer than and encasing said inner sleeve, positioned between and immediately adjacent to said inclined means, said outer sleeve adapted to be expanded outwardly into sealing engagement with said casing, said expansion being accomplished by said inclined means and aided by said inner sleeve.
Claim 6
Dependent Claim
114 words
In a packer of the type having a mandrel, expandable slip-type anchors, resilient sleeves slidably mounted coaxially on the mandrel and inclined means for expanding the slips and sleeves outwardly against oil well casing, the improvement comprising: a. an inner sleeve having an annular fold-guiding recess in its inner wall, said inner sleeve adapted to be expanded outwardly away from said mandrel; and b. an outer sleeve, having a higher durometer than and encasing said inner sleeve, positioned between and immediately adjacent to said inclined means, said outer sleeve adapted to be expanded outwardly into sealing engagement with said casing, said expansion being accomplished by said inclined means and aided by said inner sleeve.
Claim 7
Dependent Claim
19 words
The improvement of claim 4 wherein said inner sleeve is a sealed resilient container filled with a noncompressible fluid.
Claim 8
Dependent Claim
13 words
The improvement of claim 5 wherein said noncompressible fluid is a hydraulic oil.
References Cited (Backward Citations)
US2173903A
Cited
US2565130A
Cited
US2612953A
Cited
US2602513A
Cited
US3068942A
Cited
US3461959A
Cited
US3371716A
Cited
US3554280A
Cited
US3517742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |