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Class Information
Number: 175/83
Name: Boring or penetrating the earth > Tool shaft advanced relative to guide insertable in inaccessible hole to change direction of advance > Guide carried by shaft to operative position > With clutch means acting between shaft and guide
Description: Apparatus in which the means changing the direction of advance and the tool shaft are provided with means for preventing their relative rotation which is manipulable, usually by relative longitudinal movement, to permit relative rotation therebetween.

Patents under this class:

Patent Number Title Of Patent Date Issued
7669672 Apparatus, system and method for installing boreholes from a main wellbore Mar. 2, 2010
7216726 Downhole fluid-tight flexible joint May. 15, 2007
6588542 Borehole tool actuating mechanism Jul. 8, 2003
6401842 Directional drilling apparatus with shifting cam Jun. 11, 2002
6315075 Borehole logging tool with anchoring mechanism Nov. 13, 2001
5012877 Apparatus for deflecting a drill string May. 7, 1991
4989679 Centering device that can be engaged or disengaged, specifically for a drilling assembly Feb. 5, 1991
4305462 Apparatus for positioning deflection wedges Dec. 15, 1981

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