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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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Class Information
Number: 175/349
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > Longitudinal axis cutter > With transverse axis cutter
Description: Apparatus in which an additional rolling cutter element is mounted on an axis extending transversely of the bit head.










Patents under this class:

Patent Number Title Of Patent Date Issued
7240745 Drill bit lubrication apparatus and method Jul. 10, 2007
5033558 Well tool for use with down-hole drilling apparatus Jul. 23, 1991
4433738 Method and apparatus for use when changing the direction of a well bore Feb. 28, 1984
3945447 Boring apparatus Mar. 23, 1976











 
 
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