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Class Information
Number: 175/336
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > Rolling cutter bit with fixed cutter
Description: Apparatus in which the bit includes a cutter element or cutting edge other than a rolling cutter element or portion thereof.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8678111 Hybrid drill bit and design method Mar. 25, 2014
8672060 High shear roller cone drill bits Mar. 18, 2014
8459378 Hybrid drill bit Jun. 11, 2013
8448724 Hole opener with hybrid reaming section May. 28, 2013
8356398 Modular hybrid drill bit Jan. 22, 2013
8347989 Hole opener with hybrid reaming section and method of making Jan. 8, 2013
8336646 Hybrid bit with variable exposure Dec. 25, 2012
8312942 Roller cone drill bits with improved fluid flow Nov. 20, 2012
8268452 Bonding agents for improved sintering of earth-boring tools, methods of forming earth-boring tools and resulting structures Sep. 18, 2012
8205692 Rock bit and inserts with a chisel crest having a broadened region Jun. 26, 2012
8157026 Hybrid bit with variable exposure Apr. 17, 2012
8141664 Hybrid drill bit with high bearing pin angles Mar. 27, 2012
8112258 PDC drill bit using optimized side rake angle Feb. 7, 2012
8096372 Cutter geometry for increased bit life and bits incorporating the same Jan. 17, 2012
8047307 Hybrid drill bit with secondary backup cutters positioned with high side rake angles Nov. 1, 2011
7845435 Hybrid drill bit and method of drilling Dec. 7, 2010
7841426 Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit Nov. 30, 2010
7831419 PDC drill bit with cutter design optimized with dynamic centerline analysis having an angular separation in imbalance forces of 180 degrees for maximum time Nov. 9, 2010
7819208 Dynamically stable hybrid drill bit Oct. 26, 2010
7407525 Fracture and wear resistant compounds and down hole cutting tools Aug. 5, 2008
7318492 Rotary drill bit Jan. 15, 2008
6719073 Single-cone rock bit having cutting structure adapted to improve hole cleaning, and to reduce tracking and bit balling Apr. 13, 2004
6601661 Secondary cutting structure Aug. 5, 2003
6595305 Drill bit, hard member, and bit body Jul. 22, 2003
6536543 Rotary drill bits exhibiting sequences of substantially continuously variable cutter backrake angles Mar. 25, 2003
6394199 Non-circular gauge reaming row inserts May. 28, 2002
6367568 Steel tooth cutter element with expanded crest Apr. 9, 2002
6332503 Fixed cutter bit with chisel or vertical cutting elements Dec. 25, 2001
6241034 Cutter element with expanded crest geometry Jun. 5, 2001
6167975 One cone rotary drill bit featuring enhanced grooves Jan. 2, 2001
6161634 Cutter element with non-rectilinear crest Dec. 19, 2000
6119797 Single cone earth boring bit Sep. 19, 2000
6026916 Rotary drill arrangement Feb. 22, 2000
5544550 Fabrication method for rotary bits and bit components Aug. 13, 1996
5452770 Rock bit and improved forging method for manufacturing thereof Sep. 26, 1995
5433280 Fabrication method for rotary bits and bit components and bits and components produced thereby Jul. 18, 1995
5176212 Combination drill bit Jan. 5, 1993
5145017 Kerf-cutting apparatus for increased drilling rates Sep. 8, 1992
5027913 Insert attack angle for roller cone rock bits Jul. 2, 1991
5016718 Combination drill bit May. 21, 1991
4936398 Rotary drilling device Jun. 26, 1990
4892159 Kerf-cutting apparatus and method for improved drilling rates Jan. 9, 1990
4751972 Revolving cutters for rock bits Jun. 21, 1988
4630869 Shield tunneling machine Dec. 23, 1986
4527644 Drilling bit Jul. 9, 1985
4448269 Cutter head for pit-boring machine May. 15, 1984
4444281 Combination drag and roller cutter drill bit Apr. 24, 1984
4386669 Drill bit with yielding support and force applying structure for abrasion cutting elements Jun. 7, 1983
4359112 Hybrid diamond insert platform locator and retention method Nov. 16, 1982
4343371 Hybrid rock bit Aug. 10, 1982

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