US4794990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion protected shaped charge and method
Assignee: Halliburton Co
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Filing: 1987-01-06
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Granted: 1989-01-03
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Expires: 2007-01-06
Abstract
Abstract An improved shaped charge comprised of a bell-shaped casing, a shaped explosive material disposed within the casing having a cavity formed therein and a liner disposed within the cavity formed of compressed powdered metal is provided. The compressed powdered metal liner includes a coating of an unsaturated organic compound or mixture of such organic compounds thereon whereby the liner is protected from corrosion attack without adversely affecting the performance of the shaped charge. A method of preventing the corrosion of the compressed powdered metal liner of a shaped charge is also provided.
Inventors
- 👤 Robert S. Riggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:39
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; E21B43/00; E21B43/11; E21B43/116; E21B43/117; F; F42; F42B; F42B1/00; F42B1/02; F42B1/032
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
71 words
In a shaped charge comprised of a bell-shaped casing, an explosive material disposed within said casing having a cavity formed therein and a liner disposed within the cavity formed of compressed powdered metal, the improvement comprising including a coating of an unsaturated organic compound consisting essentially of linseed oil on said compressed powdered metal liner whereby said liner is protected from corrosion attack without adversely affecting the performance of said charge.
Claim 2
Dependent Claim
71 words
In a shaped charge comprised of a bell-shaped casing, an explosive material disposed within said casing having a cavity formed therein and a liner disposed within the cavity formed of compressed powdered metal, the improvement comprising including a coating of an unsaturated organic compound consisting essentially of linseed oil on said compressed powdered metal liner whereby said liner is protected from corrosion attack without adversely affecting the performance of said charge.
Claim 3
Dependent Claim
86 words
In a shaped charge comprised of a bell-shaped casing, an explosive material disposed within said casing having a cavity formed therein and a liner disposed within the cavity formed of compressed powdered metal, the improvement comprising said compressed powdered metal liner being formed of a mixture of copper and lead and including a coating of an unsaturated organic compound consisting essentially boiled linseed oil on said compressed powdered metal liner whereby said liner is protected by corrosion attack without adversely affecting the performance of said charge.
Claim 4
Dependent Claim
86 words
In a shaped charge comprised of a bell-shaped casing, an explosive material disposed within said casing having a cavity formed therein and a liner disposed within the cavity formed of compressed powdered metal, the improvement comprising said compressed powdered metal liner being formed of a mixture of copper and lead and including a coating of an unsaturated organic compound consisting essentially boiled linseed oil on said compressed powdered metal liner whereby said liner is protected by corrosion attack without adversely affecting the performance of said charge.
Claim 5
Dependent Claim
93 words
In a shaped charge comprised of a bell-shaped casing, an explosive material disposed within said casing having a cavity formed therein and a liner disposed within the cavity formed of compressed powdered metal, the improvement comprising including a coating of an unsaturated organic compound or mixture of such organic compounds on said compressed metal liner whereby said liner is protected from corrosion attack without adversely affecting the performance of said charge, said coating being applied to said powdered metal prior to when said powdered metal is compressed and said liner is formed therefrom.
Claim 6
Dependent Claim
93 words
In a shaped charge comprised of a bell-shaped casing, an explosive material disposed within said casing having a cavity formed therein and a liner disposed within the cavity formed of compressed powdered metal, the improvement comprising including a coating of an unsaturated organic compound or mixture of such organic compounds on said compressed metal liner whereby said liner is protected from corrosion attack without adversely affecting the performance of said charge, said coating being applied to said powdered metal prior to when said powdered metal is compressed and said liner is formed therefrom.
Claim 7
Dependent Claim
91 words
In an oil and gas well perforating gun comprised of a tubular housing and a plurality of shaped charges disposed within the housing, each of the shaped charges including a bell-shaped casing and a compressed powdered metal liner disposed within the casing with explosive material therebetween, the improvement comprising each of said compressed powdered metal liners of said shaped charges including a coating of an unsaturated organic compound consisting essentially of linseed oil thereon whereby said liners are protected from corrosion attack without adversely affecting the performance of said shaped charges.
Claim 8
Dependent Claim
91 words
In an oil and gas well perforating gun comprised of a tubular housing and a plurality of shaped charges disposed within the housing, each of the shaped charges including a bell-shaped casing and a compressed powdered metal liner disposed within the casing with explosive material therebetween, the improvement comprising each of said compressed powdered metal liners of said shaped charges including a coating of an unsaturated organic compound consisting essentially of linseed oil thereon whereby said liners are protected from corrosion attack without adversely affecting the performance of said shaped charges.
Claim 9
Dependent Claim
55 words
The perforating gun of claim 4 wherein said tubular housing includes a plurality of ports formed therein and each of said shaped charges is positioned in alignment with one of said ports whereby upon detonation of said charges, said compressed powdered metal liners are destroyed and jets are formed which are directed through said ports.
Claim 10
Dependent Claim
17 words
The perforating gun of claim 5 wherein each of said ports is sealed with a replaceable plug.
Claim 11
Dependent Claim
18 words
The perforating gun of claim 6 wherein said compressed powdered metal liners of said shaped charges are cone-shaped.
Claim 12
Dependent Claim
101 words
In an oil and gas well perforating gun comprised of a tubular housing and a plurality of shaped charges disposed within the housing, each of the shaped charges including a bell-shaped casing and a compressed powdered metal liner disposed within the casing with explosive material therebetween, the improvement comprising each of said compressed powdered metal liners of said shaped charges being comprised of a mixture of copper and lead and including a coating of an unsaturated organic compound consisting essentially boiled linseed oil thereon whereby said liners are protected from corrosion attack without adversely affecting the performance of said shaped charges.
Claim 13
Dependent Claim
101 words
In an oil and gas well perforating gun comprised of a tubular housing and a plurality of shaped charges disposed within the housing, each of the shaped charges including a bell-shaped casing and a compressed powdered metal liner disposed within the casing with explosive material therebetween, the improvement comprising each of said compressed powdered metal liners of said shaped charges being comprised of a mixture of copper and lead and including a coating of an unsaturated organic compound consisting essentially boiled linseed oil thereon whereby said liners are protected from corrosion attack without adversely affecting the performance of said shaped charges.
Claim 14
Dependent Claim
109 words
In an oil and gas well perforating gun comprised of a tubular housing and a plurality of shaped charges disposed within the housing, each of the shaped charges including a bell-shaped casing and a compressed powdered metal liner disposed within the casing with explosive material therebetween, the improvement comprising each of said compressed powdered metal liners of said shaped charges including a coating of unsaturated organic compound or compounds thereon whereby said liners are protected from corrosion attack without adversely affecting the performance of said shaped charges, said coating being applied to said powdered metal prior to when said powdered metal is compressed and said liner is formed therefrom.
Claim 15
Dependent Claim
109 words
In an oil and gas well perforating gun comprised of a tubular housing and a plurality of shaped charges disposed within the housing, each of the shaped charges including a bell-shaped casing and a compressed powdered metal liner disposed within the casing with explosive material therebetween, the improvement comprising each of said compressed powdered metal liners of said shaped charges including a coating of unsaturated organic compound or compounds thereon whereby said liners are protected from corrosion attack without adversely affecting the performance of said shaped charges, said coating being applied to said powdered metal prior to when said powdered metal is compressed and said liner is formed therefrom.
Claim 16
Independent Claim
74 words
A method of preventing the corrosion of the liner of a shaped charge comprised of a bell-shaped casing, an explosive material disposed within the casing having a cavity formed therein and a compressed powdered metal liner disposed within the cavity comprising coating said compressed powdered metal liner with an unsaturated organic compound consisting essentially of linseed oil whereby said liner is protected from corrosion attack without adversely affecting the performance of said shaped charge.
Claim 17
Independent Claim
74 words
A method of preventing the corrosion of the liner of a shaped charge comprised of a bell-shaped casing, an explosive material disposed within the casing having a cavity formed therein and a compressed powdered metal liner disposed within the cavity comprising coating said compressed powdered metal liner with an unsaturated organic compound consisting essentially of linseed oil whereby said liner is protected from corrosion attack without adversely affecting the performance of said shaped charge.
Claim 18
Dependent Claim
28 words
The method of claim 10 wherein said compressed powdered metal liner is coated with said unsaturated organic compound by applying said compound to the surfaces of said liner.
Claim 19
Independent Claim
82 words
A method of preventing the corrosion of the liner of a shaped charge comprised of a bell-shaped casing, an explosive material disposed within the casing having a cavity formed therein and a compressed powdered metal liner formed of a mixture of copper and lead disposed within the cavity comprising coating said compressed powdered metal liner with an unsaturated organic compound consisting essentially boiled linseed oil whereby said liner is protected from corrosion attack without adversely affecting the performance of said shaped charge.
Claim 20
Independent Claim
82 words
A method of preventing the corrosion of the liner of a shaped charge comprised of a bell-shaped casing, an explosive material disposed within the casing having a cavity formed therein and a compressed powdered metal liner formed of a mixture of copper and lead disposed within the cavity comprising coating said compressed powdered metal liner with an unsaturated organic compound consisting essentially boiled linseed oil whereby said liner is protected from corrosion attack without adversely affecting the performance of said shaped charge.
Claim 21
Independent Claim
114 words
A method of preventing the corrosion of the liner of a shaped charge comprised of a bell-shaped casing, an explosive material disposed within the casing having a cavity formed therein and a compressed powdered metal liner disposed within the cavity comprising coating said compressed powdered metal liner with an unsaturated organic compound or mixture of such compounds whereby said liner is protected from corrosion attack without adversely affecting the performance of said shaped charge, said compressed powdered metal liner being coated with said unsaturated organic compound or compounds by mixing said unsaturated compound or compounds with the powdered metal used to form said liner prior to compressing said powdered metal and forming said liner.
Claim 22
Independent Claim
114 words
A method of preventing the corrosion of the liner of a shaped charge comprised of a bell-shaped casing, an explosive material disposed within the casing having a cavity formed therein and a compressed powdered metal liner disposed within the cavity comprising coating said compressed powdered metal liner with an unsaturated organic compound or mixture of such compounds whereby said liner is protected from corrosion attack without adversely affecting the performance of said shaped charge, said compressed powdered metal liner being coated with said unsaturated organic compound or compounds by mixing said unsaturated compound or compounds with the powdered metal used to form said liner prior to compressing said powdered metal and forming said liner.
Claim 23
Dependent Claim
40 words
The method of claim 13 wherein said unsaturated organic compound of compounds are mixed with said powdered metal in an amount in the range of from about 0.001% to about 1% by weight of the resulting powdered metal-organic compound mixture.
Claim 24
Dependent Claim
29 words
The method of claim 13 wherein said powdered metal is comprised of a mixture of copper and lead and said unsaturated mixtured of organic compounds is boiled linseed oil.
Claim 25
Dependent Claim
33 words
The method of claim 15 wherein said mixture of powdered copper and lead contains copper in an amount in the range of from about 50% to about 90% by weight of said mixture.
Claim 26
Dependent Claim
37 words
The method of claim 16 wherein said mixture of unsaturated organic compounds is mixed with said mixture of powdered copper and lead in an amount of about 0.1% by weight of the resulting powdered metal-organic compound mixture.
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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) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |