E21B 10/54
The bit being of the rotary drag type
Official title: the bit being of the rotary drag type, e.g. fork-type bits
E21B10/54 (The bit being of the rotary drag type) appears on 986 US grants and 942 published applications in this corpus.
Search patents in E21B- Granted patents
- 986
- Published applications
- 942
- Assignees
- 162
- Inventors
- 1,005
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 6 | 0 |
| 1986 | 1 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 7 | 0 |
| 1995 | 10 | 0 |
| 1996 | 6 | 0 |
| 1997 | 11 | 0 |
| 1998 | 13 | 0 |
| 1999 | 22 | 0 |
| 2000 | 17 | 0 |
| 2001 | 13 | 4 |
| 2002 | 12 | 7 |
| 2003 | 13 | 9 |
| 2004 | 8 | 7 |
| 2005 | 3 | 8 |
| 2006 | 6 | 12 |
| 2007 | 7 | 20 |
| 2008 | 11 | 39 |
| 2009 | 17 | 27 |
| 2010 | 17 | 51 |
| 2011 | 26 | 54 |
| 2012 | 40 | 38 |
| 2013 | 33 | 61 |
| 2014 | 39 | 63 |
| 2015 | 67 | 86 |
| 2016 | 63 | 76 |
| 2017 | 59 | 79 |
| 2018 | 91 | 67 |
| 2019 | 87 | 68 |
| 2020 | 73 | 47 |
| 2021 | 46 | 26 |
| 2022 | 34 | 23 |
| 2023 | 27 | 17 |
| 2024 | 27 | 21 |
| 2025 | 19 | 14 |
| 2026 | 13 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Devices, systems, and methods for a cutting element6 Oct 2026US 12,753,658 B2Schlumberger Technology Corporation
- Long-life drill bit with downhole self-renewal capability11 Aug 2026US 12,704,025 B2Southwest Petroleum University
- Torque-adaptive impact tool suitable for PDC bit14 Jul 2026US 12,680,385 B2Southwest Petroleum University
- Non-uniform roller cone14 Jul 2026US 12,680,393 B2Schlumberger Technology Corporation
- Polycrystalline diamond and methods for fabricating the same14 Jul 2026US 12,680,395 B2US Synthetic Corporation
- Earth-boring tools including cutting elements having different characteristics in different regions of the earth-boring tools10 Sep 2026US 2026/0266140 A1Baker Hughes Oilfield Operations LLC
- Fixed cutter drill bits including cutter elements with high abrasion resistant polycrystalline diamond segments27 Aug 2026US 2026/0251020 A1Grant Prideco, L.P.
- Producing hydro-efflux hammer using catalyst-free pdc cutters20 Aug 2026US 2026/0241447 A1Saudi Arabian Oil Company
- Drill bit cutter elements with one or more textured, non-planar surfaces on cutting faces thereof and drill bits including same13 Aug 2026US 2026/0234995 A1National Oilwell Varco, L. P.
- Fixed cutter drill bits including cutter elements with enhanced durability13 Aug 2026US 2026/0234996 A1Grant Prideco, L.P.
Most cited
By later US patents
- Bit for subterranean drilling fabricated from separately-formed major components380US 5,560,440 ABaker Hughes Incorporated · 1996
- Drill bit having improved cutter configuration295US 4,913,247 AEastman Christensen Company · 1990
- Expandable gage bit for drilling and method of drilling271US 5,361,859 ABaker Hughes Incorporated · 1994
- Impregnated bit with PDC cutters in cone area197US 6,510,906 B1Baker Hughes Incorporated · 2003
- Superabrasive elements, methods of manufacturing, and drill bits including same194US 8,236,074 B1US Synthetic Corporation · 2012