E21B 1/38

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
2025/0027,368 VALVE CYLINDER, IMPACT DEVICE AND METHODDec 02, 22Jan 23, 25Not available
2024/0337,157 VALVE-CONTROLLED HIGH-ENERGY HYDROSTATIC DOWN-THE-HOLE IMPACT HAMMERMar 11, 24Oct 10, 24Not available
2022/0010,622 HORIZONTAL DRILLING MACHINE WITH IMPACT DEVICESep 27, 21Jan 13, 22Not available
2017/0334,052 PERCUSSION DRILLING DEVICENov 04, 15Nov 23, 17TRACTO-TECHNIK GMBH & CO. KG
2011/0031,018 HORIZONTAL DRILLING SYSTEMAug 04, 09Feb 10, 11Pioneer One, Inc.
2010/0193,212 Hydraulic pickJul 08, 08Aug 05, 10KONEK, S.R.O.
2010/0187,016 Percussion Hammer Bit With a Driver Sub Including a Guide Sleeve PortionJan 28, 09Jul 29, 10SMITH INTERNATIONAL, INC.
2010/0187,017 Down-the-hole Drill Reverse Exhaust SystemJan 28, 09Jul 29, 10CENTER ROCK, INC.
2010/0155,096 FAIL-RESISTANT HAMMER ASSEMBLY FOR A VALVELESS PERCUSSIVE DRILLJan 31, 08Jun 24, 10J.H. Fletcher & Co.
2010/0059,284 DOWN-THE-HOLE DRILL HAMMER HAVING A REVERSE EXHAUST SYSTEM AND SEGMENTED CHUCK ASSEMBLYNov 18, 09Mar 11, 10CENTER ROCK, INC.
2010/0051,348 ROCK DRILLING EQUIPMENT AND A METHOD IN ASSOCIATION WITH SAMEJan 10, 08Mar 04, 10ATLAS COPCO ROCK DRILLS AB
2010/0012,380 Percussion Drilling Assembly and Hammer Bit with an Adjustable ChokeJul 21, 08Jan 21, 10SMITH INTERNATIONAL, INC.
2009/0301,744 Jet HammerJun 08, 09Dec 10, 09COIL TUBING TECHNOLOGY, INC.
2009/0194,336 Damping and Drilling Machine Including Such a Damping DeviceDec 06, 06Aug 06, 09ATLAS COPCO ROCK DRILLS AB
2008/0035,388 Drill Bit NozzleOct 12, 07Feb 14, 08SCHLUMBERGER TECHNOLOGY CORPORATION
2007/0227,777 DOWN-THE-HOLE HAMMER WITH PILOT AND METHOD OF ENLARGING A HOLEMar 30, 06Oct 04, 07SANDVIK INTELLECTUAL PROPERTY AB
2007/0137,895 Percussion drill bit with V-shaped splinesDec 21, 05Jun 21, 07SMITH INTERNATIONAL, INC.
2006/0000,646 Down-the hole hammerSep 30, 03Jan 05, 06Minroc Technical Promotions Limited