US Patent No: 5,253,720

Number of patents in Portfolio can not be more than 2000

Method and apparatus for taking an undisturbed core sample

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention is a coring device which has features to seal off from the well fluids prior to taking of the specimen. The apparatus can be hydraulically or pneumatically actuated to move an inner string which is connected to a core barrel. Prior to moving the core barrel, an outer tube is sealingly pushed into the formation. Once the outer tube has been set into the formation, the inner tube drives the core barrel into the formation, leaving behind a rabbit. A clam shell is located at the forward end which stays open as the core barrel is driven into the formation and closes as the core barrel is withdrawn into the outer tube to retain the core. The pneumatic or hydraulic pressure continues to be applied to the inner string as the core barrel is withdrawn into the outer tube. Upon full retraction of the core barrel into the outer tube, a ball valve is actuated to seal off the core barrel. At that time, the hydraulic or pneumatic pressure is removed and the apparatus is pulled to the surface. The core barrel has a venting feature to allow any gas in the core barrel to escape as the core barrel fills with the core sample.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
EVI CHERRINGTON ENVIRONMENTAL, INC.HOUSTON, TX7

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aumann, James T Salt Lake City, UT 16 215
Karlsson, Haraldur 2723 Meandering Trail, Kingwood, TX 77339 7 436
Radford, Steven R The Woodlands, TX 99 810

Cited Art Landscape

Patent Info (Count) # Cites Year
 
EASTMAN CHRISTENSEN COMPANY (6)
4,256,192 Pressure core barrel 20 1979
4,552,229 Externally powered core catcher 9 1983
4,553,613 Hydraulic lift inner barrel in a drill string coring tool 7 1983
4,605,075 Shrouded core catcher 10 1984
4,606,416 Self activating, positively driven concealed core catcher 13 1984
4,607,710 Cammed and shrouded core catcher 12 1984
 
C. KEITH THOMPSON (1)
4,310,057 Apparatus for extracting subterranean gas samples 47 1980
 
HANDLEY, JAMES P. (1)
4,807,707 Sampling apparatus and method 46 1987
 
K-V Associates, Inc. (1)
4,804,050 Method of underground fluid sampling 55 1987
 
Mining Tools, Div. of Smith Int'l., Inc. (1)
4,356,873 Cutter mounting and apparatus and method for a drill bit 28 1980
 
NORWEGIAN GEOTECHNICAL INSTITUTE, A CORP. OF NORWAY (1)
4,518,050 Rotating double barrel core sampler 21 1983
 
Phillips Petroleum Company (1)
4,335,622 Soil gas probe 20 1980
 
TOTAL FINA ELF (1)
2002/0197,174 Electrical pump, and method for using plurality of submersible electrical pumps for well completion 2002
 
Other [Check patent profile for assignment information] (2)
4,350,005 Fruit picker 2 1981
4,669,554 Ground water monitoring device and method 50 1985

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
BAKER HUGHES INCORPORATED (7)
5,568,838 Bit-stabilized combination coring and drilling system 110 1994
6,006,844 Method and apparatus for simultaneous coring and formation evaluation 45 1996
6,719,070 Apparatus and methods for sponge coring 4 2000
7,093,676 Apparatus and methods for sponge coring 0 2003
7,004,265 Apparatus and methods for sponge coring 1 2005
7,234,547 Apparatus and methods for sponge coring 1 2006
7,231,991 Apparatus and methods for sponge coring 1 2006
 
JAPAN OIL, GAS AND METALS NATIONAL CORPORATION (5)
6,216,804 Apparatus for recovering core samples under pressure 20 1998
6,378,631 Apparatus for recovering core samples at in situ conditions 19 2000
6,305,482 Method and apparatus for transferring core sample from core retrieval chamber under pressure for transport 14 2000
6,230,825 Apparatus for recovering core samples under pressure 9 2000
6,659,204 Method and apparatus for recovering core samples under pressure 17 2001
 
GE HEALTHCARE BIO-SCIENCES CORP. (1)
7,059,207 Motor driven sampling apparatus for material collection 2 2003
 
J. I. LIVINGSTONE ENTERPRISES LTD. (1)
8,757,293 Air hammer coring apparatus and method 0 2008
 
LONGYEAR TM, INC. (1)
8,333,255 High productivity core drilling system 1 2008
 
REEDHYCALOG, L.P. (1)
6,009,960 Coring tool 7 1998

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