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Class Information
Number: 175/268
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Cutter element shifted by fluid pressure > With dropped element
Description: Apparatus in which a part is provided which is specifically described as being dropped from above ground to an operative position below ground, said part functioning to cause operation of the fluid shifting means, for example, by (1) operating a latch, (2) providing a fluid reacting surface or (3) operating a valve or other means to permit movement of the cutter element.










Patents under this class:

Patent Number Title Of Patent Date Issued
8657039 Restriction element trap for use with an actuation element of a downhole apparatus and method of use Feb. 25, 2014
8555983 Apparatus and method for activating and deactivating a downhole tool Oct. 15, 2013
8540035 Extendable cutting tools for use in a wellbore Sep. 24, 2013
8459375 Tools for use in drilling or enlarging well bores having expandable structures and methods of making and using such tools Jun. 11, 2013
8381837 Downhole tool deactivation and re-activation Feb. 26, 2013
8365842 Ratchet mechanism in a fluid actuated device Feb. 5, 2013
8251161 Device for actuating a bottom tool Aug. 28, 2012
8205689 Stabilizer and reamer system having extensible blades and bearing pads and method of using same Jun. 26, 2012
7975783 Reaming and stabilization tool and method for its use in a borehole Jul. 12, 2011
7775302 Casing shoe and retrievable bit assembly Aug. 17, 2010
7673708 Ball-activated mechanism for controlling the operation of a downhole tool Mar. 9, 2010
7665545 Pressure controlled downhole operations Feb. 23, 2010
7584811 Reaming and stabilization tool and method for its use in a borehole Sep. 8, 2009
7401666 Reaming and stabilization tool and method for its use in a borehole Jul. 22, 2008
7100713 Expandable apparatus for drift and reaming borehole Sep. 5, 2006
6443247 Casing drilling shoe Sep. 3, 2002
6131675 Combination mill and drill bit Oct. 17, 2000
4603749 Apparatus for downward displacement of an inner tube within a coring barrel Aug. 5, 1986
4177866 System for boring raises having portions of different diameters Dec. 11, 1979











 
 
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