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Class Information
Number: 175/286
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Cutter element shifted by longitudinally relatively movable parts > Cam or gear engaging cutter element
Description: Apparatus in which one of the relatively longitudinally movable parts comprises the transversely movable cutter element and another of the parts comprises a cam or gear element having a portion engaging the cutter element so that as the parts move longitudinally relative to each other the cutter element will be moved transversely of the bit head.

Sub-classes under this class:

Class Number Class Name Patents
175/289 Cutter element spring biased to retracted position 21
175/288 Cutter element substantially longitudinally movable on shaft 11
175/287 With separate latch holding cutter element in shifted position 7

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8561724 Expanding mill having camming sleeve for extending cutting blade Oct. 22, 2013
8439135 Down-the-hole drill hammer having an extendable drill bit assembly May. 14, 2013
8371389 Differential shifting tool and method of shifting Feb. 12, 2013
8360173 Positive engagement underreamer and method Jan. 29, 2013
8302706 Apparatus and method for installing ground anchoring systems Nov. 6, 2012
8276690 Expandable downhole tool Oct. 2, 2012
8235147 Apparatus and method for installing ground anchoring systems Aug. 7, 2012
8122978 Drilling device with undercutting Feb. 28, 2012
8113301 Jetted underreamer assembly Feb. 14, 2012
7958951 Method for assembling an underreaming tool Jun. 14, 2011
7891441 Expandable downhole tool Feb. 22, 2011
7810568 Method of making a window in a tubular using an expandable watermelon mill Oct. 12, 2010
7681667 Drilling apparatus Mar. 23, 2010
7665550 Underreamer and method of use Feb. 23, 2010
7658241 Underreaming and stabilizing tool and method for its use Feb. 9, 2010
7654342 Underreaming and stabilization tool for use in a borehole and method for its use Feb. 2, 2010
7493971 Concentric expandable reamer and method Feb. 24, 2009
6920923 Section mill for wells Jul. 26, 2005
6851492 Fastener, hammering jig for installing the fastener, and drill bit for working undercut hole Feb. 8, 2005
6561286 Well bore reamer and method May. 13, 2003
6439323 Seismic shothole reaming module Aug. 27, 2002
6394197 Reverse circulation drilling system with bit locked underreamer arms May. 28, 2002
6209665 Reverse circulation drilling system with bit locked underreamer arms Apr. 3, 2001
5975222 Reverse circulation drilling system with bit locked underreamer arms Nov. 2, 1999
5853054 2-Stage underreamer Dec. 29, 1998
5787999 Drill bit with set of underreamer arms Aug. 4, 1998
5735650 Drill bit for drilling an undercut hole Apr. 7, 1998
5560440 Bit for subterranean drilling fabricated from separately-formed major components Oct. 1, 1996
5361859 Expandable gage bit for drilling and method of drilling Nov. 8, 1994
5141063 Restriction enhancement drill Aug. 25, 1992
5107943 Method and apparatus for gravel packing of wells Apr. 28, 1992
5060738 Three-blade underreamer Oct. 29, 1991
5036921 Underreamer with sequentially expandable cutter blades Aug. 6, 1991
4998981 Bit for drilling an undercut hole Mar. 12, 1991
4992010 Device for forming an undercut in a drilled hole Feb. 12, 1991
4846290 Underreamer with revolving diamond cutter elements Jul. 11, 1989
4842082 Variable outside diameter tool for use in pikewells Jun. 27, 1989
4819744 Funnel hole ice auger Apr. 11, 1989
4646826 Well string cutting apparatus Mar. 3, 1987
4640373 Bore head for deep-hole boring Feb. 3, 1987
4635737 Undercutting drill Jan. 13, 1987
4550788 Roof bolt hole groover Nov. 5, 1985
4458761 Underreamer with adjustable arm extension Jul. 10, 1984
4446934 Boring tool for radial enlargement of a cylindrical foundation bore May. 8, 1984
4444279 Drilling tool Apr. 24, 1984
4354560 Apparatus for drilling enlarged boreholes Oct. 19, 1982
4354559 Enlarged borehole drilling method and apparatus Oct. 19, 1982
4144942 Method of setting a pile without noise or vibration and apparatus therefor Mar. 20, 1979
4091882 Drilling tool May. 30, 1978
4055226 Underreamer having splined torque transmitting connection between telescoping portions for control of cutter position Oct. 25, 1977

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