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Class Information
Number: 175/306
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > Telescoping members relatively rotatable > With means to couple members to prevent relative rotation
Description: Apparatus in which selectively engageable means are provided on the telescoping members for transmitting rotary motion from one member to the other.










Patents under this class:

Patent Number Title Of Patent Date Issued
8657040 Percussion drilling assembly and locking system therefor Feb. 25, 2014
8397839 Self-indexing down-the-hole drill Mar. 19, 2013
8381843 Well bore reamer Feb. 26, 2013
7997346 Percussion drilling assembly with annular locking member Aug. 16, 2011
7987930 Drill bit assembly for fluid-operated percussion drill tools Aug. 2, 2011
7975784 Drill bit assembly for fluid-operated percussion drill tools Jul. 12, 2011
7882906 Up-down vibratory drilling and jarring tool Feb. 8, 2011
7866416 Clutch for a jack element Jan. 11, 2011
7234544 Drill tool shaft-to-housing locking device Jun. 26, 2007
7017682 Drill string shutoff valve Mar. 28, 2006
6981560 Method and apparatus for treating a productive zone while drilling Jan. 3, 2006
6896060 Downhole jarring tool adjuster May. 24, 2005
6866096 E-line downhole jarring tool Mar. 15, 2005
6745836 Down hole motor assembly and associated method for providing radial energy Jun. 8, 2004
6705415 Directional drilling apparatus Mar. 16, 2004
6702040 Telescopic drilling method Mar. 9, 2004
6516903 Drill bit stabilizer device Feb. 11, 2003
6397957 Jacket tube for a drilling and anchoring device Jun. 4, 2002
6357538 Bit torque limiting device Mar. 19, 2002
6182774 Bit torque limiting device Feb. 6, 2001
6082457 Method of using a drill string tool Jul. 4, 2000
5947214 BIT torque limiting device Sep. 7, 1999
5778993 Locking a sample tube in a downhole hammer Jul. 14, 1998
5407021 Down-the-hole hammer drill having reverse circulation Apr. 18, 1995
5010965 Self-propelled ram boring machine Apr. 30, 1991
5005656 Device in impact machines Apr. 9, 1991
4745983 Bit seat protector device for drilling systems or the like May. 24, 1988
4665998 Mechanical well jar May. 19, 1987
4573536 Method and apparatus for flushing a well Mar. 4, 1986
4452307 Reamer Jun. 5, 1984
4408670 Impact cam subassembly for drills Oct. 11, 1983
4210316 Drill string shock absorber with improved pin type torque transmission means Jul. 1, 1980











 
 
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