Patent US4338713A successfully refreshed from Google Patents.
US4338713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of powdered metal casing
Assignee: Halliburton Co
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Filing: 1980-04-21
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Granted: 1982-07-13
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Expires: 2000-04-21
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
2026-10-30 09:14
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/02; B22F1/00; B22F1/09; B22F1/12; E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117; F; F42; F42B; F42B3/00; F42B3/28
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
The method of forming a shaped charge powdered metal casing for use in an oil well perforating gun comprising the steps of: providing a mix 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; placing said mix in a mold having one movable wall, said mold having a generally bell shape with an open end and a closed end; moving said movable wall of said mold and compressing the mix within said mold until approximately 120,000 PSI is exerted upon the mix within said mold to form a green compact; removing the compressed mix from the mold; and forming a hole through the closed end of said compressed mix.
Claim 2
Independent Claim
141 words
The method of forming a shaped charge powdered metal casing for use in an oil well perforating gun comprising the steps of: providing a mix 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; placing said mix in a mold having one movable wall, said mold having a generally bell shape with an open end and a closed end; moving said movable wall of said mold and compressing the mix within said mold until approximately 120,000 PSI is exerted upon the mix within said mold to form a green compact; removing the compressed mix from the mold; and forming a hole through the closed end of said compressed mix.
Claim 3
Independent Claim
80 words
The method of forming a powdered metal casing, consisting of: providing a metal powder mix 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; placing said metal powder mix in a mold; and compressing said metal powder mix within said mold at a pressure of approximately 120,000 PSI.
Claim 4
Independent Claim
80 words
The method of forming a powdered metal casing, consisting of: providing a metal powder mix 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; placing said metal powder mix in a mold; and compressing said metal powder mix within said mold at a pressure of approximately 120,000 PSI.
Claim 5
Dependent Claim
21 words
The method of claim 2 wherein said casing is molded in substantially the shape of a bell having an open mouth.
Claim 6
Dependent Claim
24 words
The method of claim 3 further consisting of forming a hole through said casing at the end opposite the mouth of said bell shape.
Claim 7
Dependent Claim
9 words
The method of claim 4 wherein forming comprises punching.
Claim 8
Dependent Claim
9 words
The method of claim 4 wherein forming comprises drilling.
Claim 9
Independent Claim
129 words
The method of forming a shaped charge powdered metal casing for use in an oil well perforating gun comprising the steps of: providing a mix 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; placing said mix in a mold having one movable wall, said mold having a generally bell shape with an open end and a closed end; moving said movable wall of said mold and compressing the mix within said mold to form a green compact; removing the compressed mix from the mold; and forming a hole through the closed end of said compressed mix.
Claim 10
Independent Claim
129 words
The method of forming a shaped charge powdered metal casing for use in an oil well perforating gun comprising the steps of: providing a mix 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; placing said mix in a mold having one movable wall, said mold having a generally bell shape with an open end and a closed end; moving said movable wall of said mold and compressing the mix within said mold to form a green compact; removing the compressed mix from the mold; and forming a hole through the closed end of said compressed mix.
Claim 11
Independent Claim
73 words
The method of forming a powdered metal casing, consisting of: providing a metal powder mix 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; placing said metal powder mix in a mold; and compressing said metal powder mix within said mold.
Claim 12
Independent Claim
73 words
The method of forming a powdered metal casing, consisting of: providing a metal powder mix 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; placing said metal powder mix in a mold; and compressing said metal powder mix within said mold.
Claim 13
Dependent Claim
21 words
The method of claim 8 wherein said casing is molded in substantially the shape of a bell having an open mouth.
Claim 14
Dependent Claim
24 words
The method of claim 10 further consisting of forming a hole through said casing at the end opposite the mouth of said bell shape.
Claim 15
Dependent Claim
9 words
The method of claim 10 wherein forming comprises punching.
Claim 16
Dependent Claim
9 words
The method of claim 10 wherein forming comprises drilling.
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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) | 1985-07-12 | 1986-01-11 | 1986-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-12 | 1990-01-11 | 1990-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-12 | 1994-01-11 | 1994-07-13 | $7700.00 | Window Closed / Lapsed |