E21B 10/56
Button-type inserts
Official title: Button-type inserts (E21B10/52 takes precedence)
E21B10/56 (Button-type inserts) appears on 2,147 US grants and 1,712 published applications in this corpus.
Search patents in E21B- Granted patents
- 2,147
- Published applications
- 1,712
- Assignees
- 282
- Inventors
- 1,754
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 7 | 0 |
| 1978 | 12 | 0 |
| 1979 | 8 | 0 |
| 1980 | 11 | 0 |
| 1981 | 20 | 0 |
| 1982 | 14 | 0 |
| 1983 | 12 | 0 |
| 1984 | 19 | 0 |
| 1985 | 28 | 0 |
| 1986 | 21 | 0 |
| 1987 | 29 | 0 |
| 1988 | 34 | 0 |
| 1989 | 28 | 0 |
| 1990 | 27 | 0 |
| 1991 | 39 | 0 |
| 1992 | 29 | 0 |
| 1993 | 16 | 0 |
| 1994 | 29 | 0 |
| 1995 | 28 | 0 |
| 1996 | 23 | 0 |
| 1997 | 39 | 0 |
| 1998 | 41 | 0 |
| 1999 | 45 | 0 |
| 2000 | 49 | 0 |
| 2001 | 52 | 17 |
| 2002 | 39 | 32 |
| 2003 | 32 | 23 |
| 2004 | 17 | 28 |
| 2005 | 24 | 32 |
| 2006 | 21 | 46 |
| 2007 | 12 | 43 |
| 2008 | 26 | 53 |
| 2009 | 37 | 48 |
| 2010 | 43 | 79 |
| 2011 | 49 | 96 |
| 2012 | 60 | 89 |
| 2013 | 69 | 98 |
| 2014 | 96 | 137 |
| 2015 | 92 | 102 |
| 2016 | 97 | 111 |
| 2017 | 104 | 111 |
| 2018 | 108 | 98 |
| 2019 | 133 | 104 |
| 2020 | 95 | 66 |
| 2021 | 65 | 50 |
| 2022 | 48 | 68 |
| 2023 | 55 | 54 |
| 2024 | 73 | 50 |
| 2025 | 43 | 35 |
| 2026 | 36 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method to extend PDC bit life and improve drilling speed by mitigating slip-stick29 Sep 2026US 12,747,637 B2
- Cutting element including two or more shaped cutting features, each having a convex and inwardly/downwardly angled shape29 Sep 2026US 12,747,638 B2Halliburton Energy Services.Inc.
- Underground directional drilling apparatus22 Sep 2026US 12,742,358 B1Melfred Borzall, Inc.
- Fixed cutter drill bits with mechanically attached cutter element assemblies18 Aug 2026US 12,709,946 B2Grant Prideco, L.P.
- Cutter elements with concave recesses and fixed cutter drill bit including same18 Aug 2026US 12,709,947 B2National Oilwell Varco, L. P.
- A cutting element and methods of making same24 Sep 2026US 2026/0286782 A1Element Six (UK) Limited
- Increased drill bit or lower bha inertia for reducing hfto24 Sep 2026US 2026/0286783 A1Schlumberger Technology Corporation
- Underground directional drilling apparatus24 Sep 2026US 2026/0286786 A1Melfred Borzall, Inc.
- Systems and methods for dull grading24 Sep 2026US 2026/0289758 A1Exo-Field Engineering Solutions PCT Ltd.
- 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
Most cited
By later US patents
- Cutting composite formed of cemented carbide substrate and diamond layer481US 5,120,327 ADiamant Boart-Stratabit (USA) Inc. · 1992
- Temperature resistant abrasive compact and method for making same436US 4,224,380 AGeneral Electric Company · 1980
- Diamond rock tools for percussive and rotary crushing rock drilling421US 5,154,245 ASandvik AB · 1992
- Cutting elements for rotary drill bits409US 5,135,061 A1992
- Composite abrasive compact having high thermal stability403US 5,127,923 AUS Synthetic Corporation · 1992