US4643019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous end plug disk for testing core samples
Assignee: Marathon Oil Co
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Filing: 1985-10-25
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Granted: 1987-02-17
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Expires: 2005-10-25
Abstract
Abstract Improved end plugs for abutting core samples during porosity and permeability testing. The end plug has a face having at least one circular channel and a plurality of radial channels formed on its surface which are in fluid communication with the circular channel. The face abuts a porous disk which in turn abuts the core sample.
Inventors
- 👤 Stanley C. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:29
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/0806
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
182 words
An end plug abutting an end of a core sample during testing of said core sample, said end plug being in fluid communication with a fluid and capable of delivering said fluid into said end of said core sample, said end plug comprising: a porous disk (400) having a substantially flat first surface (410) abutting a face (100) of said end plug and a substantially flat second surface (420) abutting said end of said core sample; said face (100) having at least one circular channel (330, 340) formed therein between the center and outer circumference of said face, a plurality of radial channels (350) formed in said face in fluid communication with said at least one circular channel (330, 340) and a central channel (360) formed in the center of said face from which said plurality of radial channels (350) emanate outwardly to said circumference; said central channel (360) in fluid communication with said fluid for extending said fluid through said radial channels (350) into said at least one circular channel (330, 340), through said porous disk and into said core sample.
Claim 2
Dependent Claim
182 words
An end plug abutting an end of a core sample during testing of said core sample, said end plug being in fluid communication with a fluid and capable of delivering said fluid into said end of said core sample, said end plug comprising: a porous disk (400) having a substantially flat first surface (410) abutting a face (100) of said end plug and a substantially flat second surface (420) abutting said end of said core sample; said face (100) having at least one circular channel (330, 340) formed therein between the center and outer circumference of said face, a plurality of radial channels (350) formed in said face in fluid communication with said at least one circular channel (330, 340) and a central channel (360) formed in the center of said face from which said plurality of radial channels (350) emanate outwardly to said circumference; said central channel (360) in fluid communication with said fluid for extending said fluid through said radial channels (350) into said at least one circular channel (330, 340), through said porous disk and into said core sample.
Claim 3
Dependent Claim
20 words
The end plug of claim 1 wherein said formed circular and radial channels (330, 340, 350) have a semi-circular cross-section.
Claim 4
Dependent Claim
20 words
The end plug of claim 1 wherein said face and porous disk are circular and have substantially the same diameter.
Claim 5
Dependent Claim
17 words
The end plug of claim 1 wherein said face is a continuous surface of said end plug.
Claim 6
Dependent Claim
176 words
An end plug abutting an end of a core sample during testing of said core sample, said end plug being in fluid communication with a fluid and capable of delivering said fluid into said end of said core sample, said end plug comprising: a porous disk (400) having a substantially flat first surface (410) abutting a face (100) of said end plug and a substantially flat second surface (420) abutting said end of said core sample; said face (100) having two circular channels (330, 340) formed therein between the center and outer circumference of said face, a plurality of radial channels (350) formed in said face in fluid communication with said two circular channels (330, 340) and a central channel (360) formed in the center of said face from which said plurality of radial channels (350) emanate outwardly to said circumference; said central channel (360) in fluid communication with said fluid for extending said fluid through said radial channels (350) into said two circular channels (330, 340), through said porous disk and into said core sample.
Claim 7
Dependent Claim
176 words
An end plug abutting an end of a core sample during testing of said core sample, said end plug being in fluid communication with a fluid and capable of delivering said fluid into said end of said core sample, said end plug comprising: a porous disk (400) having a substantially flat first surface (410) abutting a face (100) of said end plug and a substantially flat second surface (420) abutting said end of said core sample; said face (100) having two circular channels (330, 340) formed therein between the center and outer circumference of said face, a plurality of radial channels (350) formed in said face in fluid communication with said two circular channels (330, 340) and a central channel (360) formed in the center of said face from which said plurality of radial channels (350) emanate outwardly to said circumference; said central channel (360) in fluid communication with said fluid for extending said fluid through said radial channels (350) into said two circular channels (330, 340), through said porous disk and into said core sample.
Claim 8
Dependent Claim
20 words
The end plug of clam 5 wherein said formed circular and radial channels (330, 340, 350) have a semi-circular cross-section.
Claim 9
Dependent Claim
20 words
The end plug of clam 5 wherein said formed circular and radial channels (330, 340, 350) have a semi-circular cross-section.
Claim 10
Dependent Claim
20 words
The end plug of claim 5 wherein said face and porous disk are circular and have substantially the same diameter.
Claim 11
Dependent Claim
17 words
The end plug of claim 5 wherein said face is a continuous surface of said end plug.
References Cited (Backward Citations)
US4433571A
Cited
US4561289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |