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Class Information
Number: 175/265
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Plural cutter elements longitudinally relative movable into transverse alignment
Description: Apparatus in which a plurality of cutter elements are provided, said cutter elements being movable relative to each other in the direction of the longitudinal axis of the shaft to an operative position in which the cutting edges of the cutter elements lie in the same transverse plane perpendicular to the longitudinal axis of the shaft.










Patents under this class:

Patent Number Title Of Patent Date Issued
8550188 Downhole reamer asymmetric cutting structures Oct. 8, 2013
8118099 Method and apparatus for forming and sealing a hole in a sidewall of a borehole Feb. 21, 2012
7757787 Drilling and hole enlargement device Jul. 20, 2010
7681667 Drilling apparatus Mar. 23, 2010
7597158 Drilling and hole enlargement device Oct. 6, 2009
7506703 Drilling and hole enlargement device Mar. 24, 2009
7410015 Expandable drill bit Aug. 12, 2008
7370712 Under reamer May. 13, 2008
7063155 Casing cutter Jun. 20, 2006
6973978 Drilling tool having an expandable bladder and method for using same Dec. 13, 2005
6722452 Pantograph underreamer Apr. 20, 2004
6695074 Method and apparatus for enlarging well bores Feb. 24, 2004
6691803 Drill bit assembly having pivotal cutter blades Feb. 17, 2004
6595302 Multi-blade underreamer Jul. 22, 2003
6454024 Replaceable drill bit assembly Sep. 24, 2002
6070677 Method and apparatus for enhancing production from a wellbore hole Jun. 6, 2000
5881827 Extendable bit Mar. 16, 1999
4971163 Drilling bucket apparatus for cast-in-place piles with expanded bottoms Nov. 20, 1990
4915181 Tubing bit opener Apr. 10, 1990
4819744 Funnel hole ice auger Apr. 11, 1989
4809793 Enhanced diameter clean-out tool and method Mar. 7, 1989
4604818 Under reaming pile bore excavating bucket and method of its excavation Aug. 12, 1986
4488606 Method of excavating an under-reamed pile bore Dec. 18, 1984
4396076 Under-reaming pile bore excavator Aug. 2, 1983
4366988 Sonic apparatus and method for slurry well bore mining and production Jan. 4, 1983
4141421 Under reamer Feb. 27, 1979











 
 
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