USRE31420E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powdered metal casing for perforating charge and its method of manufacture
Assignee: Halliburton Co
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Filing: 1982-08-23
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Granted: 1983-10-18
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Expires: 2002-08-23
Abstract
Abstract Disclosed herein is a powdered metal casing and an apparatus and method for making the powdered metal casing, which casing is useful for shaped explosive charges for perforating oil and gas wells.
Inventors
- 👤 Glenn B. Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:53
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/02; E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117; F; F42; F42B; F42B3/00; F42B3/28; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
38 words
A shaped charge casing formed solely of a green compact consisting of powdered metal sufficiently compressed to .[.form a jet.]. .Iadd.confine energy released .Iaddend.upon explosion of said shaped charge while being reduced to a powder by said explosion.
Claim 2
Dependent Claim
38 words
A shaped charge casing formed solely of a green compact consisting of powdered metal sufficiently compressed to .[.form a jet.]. .Iadd.confine energy released .Iaddend.upon explosion of said shaped charge while being reduced to a powder by said explosion.
Claim 3
Dependent Claim
15 words
The casing of claim 1 wherein said powdered metal is compressed to approximately 120,000 PSI.
Claim 4
Dependent Claim
51 words
The casing of claim 1 wherein said compact is composed of about 80 percent by weight of a powdered metal having a diameter of approximately 100 microns, about 19 percent by weight of powdered lead having a diameter of approximately 100 microns, and about one percent by weight of graphite powder.
Claim 5
Dependent Claim
19 words
The casing of claim 3 wherein said powdered metal has an atomic number at least as great as iron.
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) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |