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Class Information
Number: 175/344
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > Noncutting portion forwardly of rolling cutter (e.g., reamer)
Description: Apparatus in which the rolling cutter element is carried on a bit having a portion extending inwardly toward the axis of the bit and forwardly of the cutter element in the direction of boring and which has no cutting function.










Sub-classes under this class:

Class Number Class Name Patents
175/345 Longitudinal axis cutter 12


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8657038 Expandable reamer apparatus including stabilizers Feb. 25, 2014
8584776 Methods, systems, and tool assemblies for distributing weight between an earth-boring rotary drill bit and a reamer device Nov. 19, 2013
8579050 Reamer with balanced cutting structure for use in a wellbore Nov. 12, 2013
8561726 Vertical drilling system for controlling deviation Oct. 22, 2013
8464813 Cutter assembly for a raise boring reamer Jun. 18, 2013
8347989 Hole opener with hybrid reaming section and method of making Jan. 8, 2013
8281876 Reamers and methods for directional drilling Oct. 9, 2012
8256536 Backreamer for a tunneling apparatus Sep. 4, 2012
8061451 Vertical drilling system for controlling deviation Nov. 22, 2011
8042625 Drilling tool Oct. 25, 2011
8028769 Reamer with stabilizers for use in a wellbore Oct. 4, 2011
7958950 Reamer and methods for directional drilling Jun. 14, 2011
7938204 Reamer with improved hydraulics for use in a wellbore May. 10, 2011
7775303 Device for a drilling tool Aug. 17, 2010
7730969 Reamer and methods for directional drilling Jun. 8, 2010
7445063 Rock drill bit assembly Nov. 4, 2008
7445062 Grease filling arrangement in a cutter for a boring head Nov. 4, 2008
7389829 Method and apparatus for forming bored hole Jun. 24, 2008
7325630 Hole opener Feb. 5, 2008
7048078 Expandable underreamer/stabilizer May. 23, 2006
6568488 Roller pipe burster May. 27, 2003
6527066 Hole opener with multisized, replaceable arms and cutters Mar. 4, 2003
5992542 Cantilevered hole opener Nov. 30, 1999
5372209 Polycentric reamer Dec. 13, 1994
5366029 Large shaft over-reamer apparatus and method Nov. 22, 1994
5337843 Hole opener for the top hole section of oil/gas wells Aug. 16, 1994
4627501 Borer head with planetary gearing Dec. 9, 1986
4449595 Method and apparatus for drilling a curved bore May. 22, 1984
4386670 Boring head with extension elements Jun. 7, 1983
4381038 Raise bit with cutters stepped in a spiral and flywheel Apr. 26, 1983
4359114 Raise drill bit inboard cutter assembly Nov. 16, 1982
4316515 Shaft drill bit with improved cutter bearing and seal arrangement and cutter insert arrangement Feb. 23, 1982
4301876 Non-rotating stabilizer for raise boring Nov. 24, 1981
4274496 Method and device in earth cutting Jun. 23, 1981
4258805 Low cutter load raise head Mar. 31, 1981
4248314 Shaft drill bit with overlapping cutter arrangement Feb. 3, 1981
4244433 Safety mechanism for a raise drill Jan. 13, 1981
4228863 Reamer bit for raise boring Oct. 21, 1980
4202417 Raise drill with elastomeric load absorbing means May. 13, 1980
4195701 Raise drill having water passages directed toward the roller cutters Apr. 1, 1980
4194578 Raise boring head with retractable gage cutters Mar. 25, 1980
4182422 Large diameter bit with bridge mounted drive stem Jan. 8, 1980
4179000 Self-cleaning raise boring head system Dec. 18, 1979
4177866 System for boring raises having portions of different diameters Dec. 11, 1979
4142598 Two stage large diameter drill bit Mar. 6, 1979
4142593 Raise drill inner yoke bridge Mar. 6, 1979
4141421 Under reamer Feb. 27, 1979
4108259 Raise drill with removable stem Aug. 22, 1978
4102416 Stabilized conical boring tool Jul. 25, 1978
4060141 Self-propelled deep well turbine drill Nov. 29, 1977

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