E21B 10/06
Roller core bits
E21B10/06 (Roller core bits) appears on 19 US grants and 5 published applications in this corpus.
Search patents in E21B- Granted patents
- 19
- Published applications
- 5
- Assignees
- 14
- Inventors
- 35
- Latest grant
- 5 Oct 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 0 | 0 |
| 2021 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Downhole tools with variable cutting element arrays5 Oct 2021US 11,136,830 B2Schlumberger Technology Corporation
- Rotary drilling tool and method for producing a bore in the ground23 Feb 2021US 10,927,624 B2BAUER Maschinen GmbH
- Drill bits with anti-tracking features23 May 2017US 9,657,527 B2Baker Hughes Incorporated
- Drill bits with anti-tracking features10 Feb 2015US 8,950,514 B2Baker Hughes Incorporated
- Roller cone disk with shaped compacts13 Nov 2012US 8,307,920 B2Baker Hughes Incorporated
- Rotary drilling tool and method for producing a bore in the ground26 Dec 2019US 2019/0390519 A1BAUER Maschinen GmbH
- Downhole tools with variable cutting element arrays15 Aug 2019US 2019/0249497 A1Smith International, Inc.
- Drill bits with anti-tracking features30 Jul 2015US 2015/0211303 A1Baker Hughes Incorporated
- Drill Bits with Anti-Tracking Features29 Dec 2011US 2011/0315452 A1Baker Hughes Incorporated
- Roller cone disk with shaped compacts17 Feb 2011US 2011/0036639 A1Baker Hughes Incorporated
Most cited
By later US patents
- Diamond cutter rock bit with penetration limiting94US 4,006,788 ASmith International, Inc. · 1977
- Roller cone core bit with spiral stabilizers90US 5,289,889 A1994
- Rotary cone drill bit with truncated rolling cone cutters and dome area cutter inserts75US 5,695,019 ADresser Industries, Inc. · 1997
- Boring apparatus61US 4,470,470 ASumitomo Metal Mining Co., Ltd. · 1984
- Drilling device25US 4,549,614 AEngtech SA · 1985