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Class Information
Number: 175/232
Name: Boring or penetrating the earth > With means movable relative to tool below ground to stop flow toward bore bottom
Description: Apparatus including a means which is movable below ground relative to a tool or to a part of a tool, whereby the movable means will substantially block the flow of material toward the bottom of the bore, said movable means either blocking the bore, or a passage in the tool or tool shaft.

Sub-classes under this class:

Class Number Class Name Patents
175/238 Flow-stopping means includes relatively movable cutter element 5
175/236 In sample receiver removable through below-ground tool shaft 25
175/237 Means comprises dropped element 21
175/233 Movable to seal sample receiver at bore bottom pressure 13
175/243 Resiliently biased or composed of flexible material 24
175/241 Stops flow by movement about fixed pivot 5
175/234 With longitudinally spaced valve seats 23
175/239 With undisturbed core receiver 11

Patents under this class:

Patent Number Title Of Patent Date Issued
8500370 Excavation and compaction equipment for the construction of screw piles Aug. 6, 2013
8490720 Self aligning mud saver valve seat Jul. 23, 2013
8408337 Downhole blowout preventor Apr. 2, 2013
8251144 Flow diverter Aug. 28, 2012
8181719 Flow pulsing device for a drilling motor May. 22, 2012
7913772 Drilling fluid flow diverter Mar. 29, 2011
7322432 Fluid diverter tool and method Jan. 29, 2008
7096975 Modular design for downhole ECD-management devices and related methods Aug. 29, 2006
6607607 Coiled tubing wellbore cleanout Aug. 19, 2003
6561269 Canister, sealing method and composition for sealing a borehole May. 13, 2003
6543532 Electrical surface activated downhole circulating sub Apr. 8, 2003
6349763 Electrical surface activated downhole circulating sub Feb. 26, 2002
6289999 Fluid flow control devices and methods for selective actuation of valves and hydraulic drilling tools Sep. 18, 2001
5487431 Subterranean fluid sampling systems and methods Jan. 30, 1996
5363927 Apparatus and method for hydraulic drilling Nov. 15, 1994
5230390 Self-contained closure mechanism for a core barrel inner tube assembly Jul. 27, 1993
5190114 Flow pulsing apparatus for drill string Mar. 2, 1993
5070950 Remote controlled actuation device Dec. 10, 1991
5009272 Flow pulsing method and apparatus for drill string Apr. 23, 1991
4928775 Downhole surge valve for earth boring apparatus May. 29, 1990
4905778 Device for producing pressure pulses in an oil well fluid medium Mar. 6, 1990
4830122 Flow pulsing apparatus with axially movable valve May. 16, 1989
4819745 Flow pulsing apparatus for use in drill string Apr. 11, 1989
4817739 Drilling enhancement tool Apr. 4, 1989
4657092 Circulation reversing tool Apr. 14, 1987
RE29734 Well bore data-transmission apparatus with debris clearing apparatus Aug. 15, 1978
4077481 Subterranean mining apparatus Mar. 7, 1978
4066139 Sampling drill Jan. 3, 1978
4059166 Subterranean drilling and slurry mining Nov. 22, 1977

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