Assignee
CAMCO DRILLING GROUP LTD
US·42 granted patents·4,732 citations·filing 1990–1997
Top patents by PatentIndex Score
42 records- 0199US5265682ASteerable rotary drilling systemsCAMCO DRILLING GROUP LTD·Filed 1992·Granted Nov 30, 1993·416 cites·24 claims
- 0298US5732783AIn or relating to rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1996·Granted Mar 31, 1998·145 cites·6 claims
- 0398US5706905ASteerable rotary drilling systemsCAMCO DRILLING GROUP LTD·Filed 1996·Granted Jan 13, 1998·416 cites·15 claims
- 0498US5520255AModulated bias unit for rotary drillingCAMCO DRILLING GROUP LTD·Filed 1995·Granted May 28, 1996·329 cites·10 claims
- 0597US5582259AModulated bias unit for rotary drillingCAMCO DRILLING GROUP LTD·Filed 1995·Granted Dec 10, 1996·219 cites·7 claims
- 0696US5803185ASteerable rotary drilling systems and method of operating such systemsCAMCO DRILLING GROUP LTD·Filed 1996·Granted Sep 8, 1998·277 cites·16 claims
- 0796US5553679AModulated bias unit for rotary drillingCAMCO DRILLING GROUP LTD·Filed 1995·Granted Sep 10, 1996·260 cites·9 claims
- 0896US5186268ARotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1991·Granted Feb 16, 1993·237 cites·16 claims
- 0995US5778992ADrilling assembly for drilling holes in subsurface formationsCAMCO DRILLING GROUP LTD·Filed 1996·Granted Jul 14, 1998·199 cites·10 claims
- 1095US5531281ARotary drilling toolsCAMCO DRILLING GROUP LTD·Filed 1994·Granted Jul 2, 1996·203 cites·2 claims
- 1193US5244039ARotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1991·Granted Sep 14, 1993·164 cites·18 claims
- 1292US6065554APreform cutting elements for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1997·Granted May 23, 2000·177 cites·39 claims
- 1392US5603385ARotatable pressure sealCAMCO DRILLING GROUP LTD·Filed 1995·Granted Feb 18, 1997·174 cites·17 claims
- 1489US5669271AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1995·Granted Sep 23, 1997·67 cites·7 claims
- 1588US5222566ARotary drill bits and methods of designing such drill bitsCAMCO DRILLING GROUP LTD·Filed 1992·Granted Jun 29, 1993·156 cites·5 claims
- 1687US5651421ARotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1995·Granted Jul 29, 1997·125 cites·22 claims
- 1782US5649604ARotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1995·Granted Jul 22, 1997·95 cites·23 claims
- 1881US5720357ACutter assemblies for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1996·Granted Feb 24, 1998·89 cites·18 claims
- 1980US5829539ARotary drill bit with hardfaced fluid passages and method of manufacturingCAMCO DRILLING GROUP LTD·Filed 1997·Granted Nov 3, 1998·95 cites·8 claims
- 2080US5590728AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1994·Granted Jan 7, 1997·68 cites·37 claims
- 2179US5163524ARotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1991·Granted Nov 17, 1992·69 cites·9 claims
- 2278US5617928AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1995·Granted Apr 8, 1997·61 cites·14 claims
- 2378US5605199AElements faced with super hard materialCAMCO DRILLING GROUP LTD·Filed 1995·Granted Feb 25, 1997·84 cites·17 claims
- 2475US5165494ARotary drills bitsCAMCO DRILLING GROUP LTD·Filed 1990·Granted Nov 24, 1992·51 cites·4 claims
- 2574US5611649AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1995·Granted Mar 18, 1997·52 cites·12 claims
- 2674US5487436ACutter assemblies for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1994·Granted Jan 30, 1996·30 cites·11 claims
- 2770US5598750AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1994·Granted Feb 4, 1997·35 cites·15 claims
- 2869US5862873AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1996·Granted Jan 26, 1999·59 cites·33 claims
- 2969US5622233AElements faced with superhard materialsCAMCO DRILLING GROUP LTD·Filed 1995·Granted Apr 22, 1997·42 cites·5 claims
- 3069US5348109ACutter assemblies and cutting elements for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1993·Granted Sep 20, 1994·44 cites·25 claims
- 3165US5959380APrevention of particle accumulation between rotatable components of an electrical machineCAMCO DRILLING GROUP LTD·Filed 1996·Granted Sep 28, 1999·37 cites·20 claims
- 3263US5992549ACutting structures for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1997·Granted Nov 30, 1999·42 cites·21 claims
- 3361US5425288AManufacture of rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1994·Granted Jun 20, 1995·35 cites·9 claims
- 3456US5888619AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1996·Granted Mar 30, 1999·16 cites·32 claims
- 3553US5417296ARotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1994·Granted May 23, 1995·26 cites·4 claims
- 3652US5788001AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1996·Granted Aug 4, 1998·30 cites·27 claims
- 3751US5671818ARotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1995·Granted Sep 30, 1997·25 cites·15 claims
- 3849US6116355AChoke deviceCAMCO DRILLING GROUP LTD·Filed 1997·Granted Sep 12, 2000·25 cites·17 claims
- 3949US5421425ACutting elements for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1994·Granted Jun 6, 1995·20 cites·16 claims
- 4047US5699868ARotary drill bits having nozzles to enhance recirculationCAMCO DRILLING GROUP LTD·Filed 1996·Granted Dec 23, 1997·27 cites·12 claims
- 4132US5769175ACutter assemblies for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1996·Granted Jun 23, 1998·5 cites·17 claims
- 4226US5875849AApparatus and method for recompleting wells with coiled tubingCAMCO DRILLING GROUP LTD·Filed 1997·Granted Mar 2, 1999·6 cites·9 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →