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Class Information
Number: 175/404
Name: Boring or penetrating the earth > Bit or bit element > Core forming type > With core-breaking means
Description: Apparatus in which the bit is further provided with means to disintegrate the undisturbed cylindrical portion of the formation after it has been formed.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8281882 Jack element for a drill bit Oct. 9, 2012
7878271 Drill bit Feb. 1, 2011
7779901 Downhole debris catcher and associated mill Aug. 24, 2010
7694756 Indenting member for a drill bit Apr. 13, 2010
7571780 Jack element for a drill bit Aug. 11, 2009
7328755 Hydraulic drill bit assembly Feb. 12, 2008
7258179 Rotary bit with an indenting member Aug. 21, 2007
7225886 Drill bit assembly with an indenting member Jun. 5, 2007
7198119 Hydraulic drill bit assembly Apr. 3, 2007
7055626 Core bit having features for controlling flow split Jun. 6, 2006
6637521 Earth borer Oct. 28, 2003
6401840 Method of extracting and testing a core from a subterranean formation Jun. 11, 2002
6267179 Method and apparatus for accurate milling of windows in well casings Jul. 31, 2001
6158534 Core sampler Dec. 12, 2000
5957221 Downhole core sampling and testing apparatus Sep. 28, 1999
5901797 Drilling apparatus with dynamic cuttings removal and cleaning May. 11, 1999
5791424 Drill bit for the rotary-percussive drilling of preferably rock, concrete or the like Aug. 11, 1998
5655614 Self-centering polycrystalline diamond cutting rock bit Aug. 12, 1997
5360260 Tunneling machine with radially sweeping tool carriers Nov. 1, 1994
5176212 Combination drill bit Jan. 5, 1993
5145017 Kerf-cutting apparatus for increased drilling rates Sep. 8, 1992
5038870 Ice auger cutter Aug. 13, 1991
5031708 Cockable corebreaker apparatus Jul. 16, 1991
5016718 Combination drill bit May. 21, 1991
4907659 Powered soil-sampler Mar. 13, 1990
4858706 Diamond drill bit with hemispherically shaped diamond inserts Aug. 22, 1989
4854788 Drill Aug. 8, 1989
4825963 High-pressure waterjet/abrasive particle-jet coring method and apparatus May. 2, 1989
4694916 Continuous coring drill bit Sep. 22, 1987
4685339 Soil sample taker and vehicle mounting arrangement Aug. 11, 1987
4657445 Core drill and method of removing a core therefrom Apr. 14, 1987
4640374 Rotary drill bit Feb. 3, 1987
4538691 Rotary drill bit Sep. 3, 1985
4535853 Drill bit for jet assisted rotary drilling Aug. 20, 1985
4534231 Method and device for taking soil samples Aug. 13, 1985
4445580 Deep hole rock drill bit May. 1, 1984
4352400 Drill bit Oct. 5, 1982
4324300 Rotary drill bit Apr. 13, 1982
D262630 Drill bit Jan. 12, 1982
4280573 Rock-breaking tool for percussive-action machines Jul. 28, 1981
4258808 Rock drill Mar. 31, 1981
4244626 Rotary cutter for gouging out ore from mine faces or the like Jan. 13, 1981
4234048 Drill bits embodying impregnated segments Nov. 18, 1980
4230193 Rotary drill bit Oct. 28, 1980
4230191 Machine for making underground excavations Oct. 28, 1980
4228862 Apparatus for drilling holes in the ground Oct. 21, 1980
4207954 Core bit having axial conical core breaker Jun. 17, 1980
4130170 Probe for use in geological surveys Dec. 19, 1978
4078622 Road surface recessing device Mar. 14, 1978
4016942 Method and apparatus for indicating the position of one well bore with respect to a second well bore Apr. 12, 1977

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