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Class Information
Number: 175/239
Name: Boring or penetrating the earth > With means movable relative to tool below ground to stop flow toward bore bottom > With undisturbed core receiver
Description: Apparatus comprising the combination of a relatively movable, flow stopping means and structure adapted to admit and substantially encompass a cylinder of earth formation as it is being defined by an annular type bit.

Sub-classes under this class:

Class Number Class Name Patents
175/240 Movable means adapted to underlie severed core 4

Patents under this class:

Patent Number Title Of Patent Date Issued
8684110 Sealed core Apr. 1, 2014
8657037 Drill bit and core retaining device Feb. 25, 2014
8647030 Core drilling system with torque shaft Feb. 11, 2014
8613330 Coring tools and related methods Dec. 24, 2013
8453766 Hydrocarbon formation core protection and transportation apparatus Jun. 4, 2013
8430186 Sealed core Apr. 30, 2013
5209310 Corebarrel May. 11, 1993
4580643 Adjustable bearing section core barrel Apr. 8, 1986
4356872 Downhole core barrel flushing system Nov. 2, 1982
4248313 Earth boring auger Feb. 3, 1981
4230192 Core sampling apparatus and method Oct. 28, 1980

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