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Class Information
Number: 175/233
Name: Boring or penetrating the earth > With means movable relative to tool below ground to stop flow toward bore bottom > Movable to seal sample receiver at bore bottom pressure
Description: Apparatus in which the movable means seals, or cooperates with another means to seal a sample collecting chamber at the pressure which exists at the bottom of the bore.

Patents under this class:

Patent Number Title Of Patent Date Issued
7775276 Method and apparatus for downhole sampling Aug. 17, 2010
6659204 Method and apparatus for recovering core samples under pressure Dec. 9, 2003
6216804 Apparatus for recovering core samples under pressure Apr. 17, 2001
5555945 Early evaluation by fall-off testing Sep. 17, 1996
5482123 Method and apparatus for pressure coring with non-invading gel Jan. 9, 1996
4950844 Method and apparatus for obtaining a core sample at ambient pressure Aug. 21, 1990
4583595 Method and apparatus for obtaining fluid samples in a well Apr. 22, 1986
4356872 Downhole core barrel flushing system Nov. 2, 1982
4317490 Apparatus and method for obtaining a core at in situ pressure Mar. 2, 1982
4258803 Core barrel for obtaining and retrieving subterranean formation samples Mar. 31, 1981
4256192 Pressure core barrel Mar. 17, 1981
4230192 Core sampling apparatus and method Oct. 28, 1980
4142594 Method and core barrel apparatus for obtaining and retrieving subterranean formation samples Mar. 6, 1979

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