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Class Information
Number: 175/384
Name: Boring or penetrating the earth > Bit or bit element > Adjustable cutter element > Radially adjustable
Description: Apparatus in which the cutter element is adapted to be selectively held in different positions for the purpose of increasing the circular outline of the cutting edge as the bit is rotated.










Patents under this class:

Patent Number Title Of Patent Date Issued
8567530 Collapsible rock head and associated structure Oct. 29, 2013
8528668 Electronically activated underreamer and calliper tool Sep. 10, 2013
8511404 Drilling tool, apparatus and method for underreaming and simultaneously monitoring and controlling wellbore diameter Aug. 20, 2013
8469120 Methods and apparatus for controlling cutting ribbons during a drilling operation Jun. 25, 2013
8360173 Positive engagement underreamer and method Jan. 29, 2013
8302709 Downhole tool leg retention methods and apparatus Nov. 6, 2012
8177000 Modular system for a back reamer and method May. 15, 2012
8132633 Self positioning cutter and pocket Mar. 13, 2012
7963348 Expandable earth boring apparatus using impregnated and matrix materials for enlarging a borehole Jun. 21, 2011
7954564 Placement of cutting elements on secondary cutting structures of drilling tool assemblies Jun. 7, 2011
7845430 Compliantly coupled cutting system Dec. 7, 2010
7810568 Method of making a window in a tubular using an expandable watermelon mill Oct. 12, 2010
7686103 Drill bit with radially expandable cutter, and method of using same Mar. 30, 2010
7681671 Drilling apparatus having in-line extending wings and driving method thereof Mar. 23, 2010
7591329 Auger with a movable gouge for making a borehole Sep. 22, 2009
7293616 Expandable bit Nov. 13, 2007
7152702 Modular system for a back reamer and method Dec. 26, 2006
7124843 Bit assembly for a hammering drill Oct. 24, 2006
6745858 Adjustable earth boring device Jun. 8, 2004
6131675 Combination mill and drill bit Oct. 17, 2000
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
5308150 Down reaming apparatus May. 3, 1994
5234064 Roller cutter assembly having adjustable ring cutter spacing Aug. 10, 1993
5139099 Excavation tool Aug. 18, 1992
5111893 Device for drilling in and/or lining holes in earth May. 12, 1992
5009274 Laterally adjustable drilling tool Apr. 23, 1991
4819744 Funnel hole ice auger Apr. 11, 1989
4531596 Tool for boring an enlarged portion within the interior of a hole and a tiltable tool for completing that tool Jul. 30, 1985
4456082 Expandable rock bit Jun. 26, 1984
4448270 Variable diameter earth boring bit May. 15, 1984
4264246 Boring tool for boring holes of substantial length Apr. 28, 1981
4142598 Two stage large diameter drill bit Mar. 6, 1979
4133399 Boring device Jan. 9, 1979
4100983 Boring device Jul. 18, 1978
4071098 Cutter mounting extension apparatus Jan. 31, 1978
4049067 Cutter mounting extension apparatus Sep. 20, 1977
4010808 Expandable raise bit Mar. 8, 1977
3989115 Adjustable gage cutter scraper for tunneling machines Nov. 2, 1976
3960218 Grass-clearing device for lawn-sprinkler heads Jun. 1, 1976











 
 
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