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Class Information
Number: 175/325.6
Name: Boring or penetrating the earth > With tool shaft detail > Shaft carried guide or protector > Surrounding existing shaft section > Held by a fastener parallel to shaft axis
Description: Apparatus where the guide or protector means encircles and is fixed to the shaft by a securing means having a longitudinal axis equidistant to the longitudinal axis of the tool shaft.










Patents under this class:

Patent Number Title Of Patent Date Issued
8701785 Shrinkable sleeve stabilizer Apr. 22, 2014
8235148 Thread retention for an earth boring device Aug. 7, 2012
8122960 Spoolable coiled tubing spear for use in wellbores and methods of using same Feb. 28, 2012
7409758 Vibration damper systems for drilling with casing Aug. 12, 2008
7234544 Drill tool shaft-to-housing locking device Jun. 26, 2007
7025136 Torque reduction tool Apr. 11, 2006
6997254 Method of making a centering device and centering device formed by that method Feb. 14, 2006
6910534 Apparatus for attaching a sensor to a tubing string Jun. 28, 2005
6494274 Axle, a friction reducing fitting and an axle installation method Dec. 17, 2002
5833019 Pipe protector Nov. 10, 1998
5692563 Tubing friction reducer Dec. 2, 1997
5579854 Drill pipe casing protector and method Dec. 3, 1996
5553676 Reversible expander Sep. 10, 1996
5542454 Free flow low energy pipe protector Aug. 6, 1996
5199510 Raise boring head and stem assembly method Apr. 6, 1993
5069297 Drill pipe/casing protector and method Dec. 3, 1991
4796670 Drill pipe protector Jan. 10, 1989
4705121 Pin, especially for clamping a sleeve-shaped protector or centering device on its tube serving for drilling an underground deposit Nov. 10, 1987
4602690 Detachable apparatus for preventing differential pressure sticking in wells Jul. 29, 1986
4484785 Tubing protector Nov. 27, 1984
4398772 Drill pipe protector Aug. 16, 1983
4266578 Drill pipe protector May. 12, 1981
4021083 Snap-lock end ring May. 3, 1977











 
 
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