E21B 7/064
Specially adapted drill bits therefor
Official title: {specially adapted drill bits therefor}
E21B7/064 (Specially adapted drill bits therefor) appears on 244 US grants and 202 published applications in this corpus.
Search patents in E21B- Granted patents
- 244
- Published applications
- 202
- Assignees
- 84
- Inventors
- 331
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 8 | 0 |
| 2000 | 5 | 0 |
| 2001 | 12 | 1 |
| 2002 | 11 | 8 |
| 2003 | 4 | 9 |
| 2004 | 7 | 2 |
| 2005 | 3 | 1 |
| 2006 | 2 | 3 |
| 2007 | 0 | 12 |
| 2008 | 6 | 12 |
| 2009 | 8 | 8 |
| 2010 | 11 | 11 |
| 2011 | 6 | 7 |
| 2012 | 12 | 13 |
| 2013 | 11 | 4 |
| 2014 | 1 | 11 |
| 2015 | 10 | 7 |
| 2016 | 5 | 7 |
| 2017 | 5 | 10 |
| 2018 | 8 | 8 |
| 2019 | 9 | 18 |
| 2020 | 18 | 16 |
| 2021 | 13 | 8 |
| 2022 | 12 | 10 |
| 2023 | 7 | 7 |
| 2024 | 8 | 3 |
| 2025 | 6 | 3 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for steering a drill bit28 Jul 2026US 12,692,749 B1Schlumberger Technology Corporation
- Increased drill bit or lower BHA inertia for reducing HFTO30 Jun 2026US 12,669,019 B2Schlumberger Technology Corporation
- Piloting pulsed power drilling using a multi-actuator based floating electrode21 Apr 2026US 12,607,070 B2Halliburton Energy Services.Inc.
- Rod section system6 Jan 2026US 12,516,575 B2TRACTO-TECHNIK GmbH & Co. KG
- Rotary steerable system30 Dec 2025US 12,509,945 B2OnTarget Drilling, LLC
- Increased drill bit or lower bha inertia for reducing hfto24 Sep 2026US 2026/0286783 A1Schlumberger Technology Corporation
- Machining gas switch lead wire drilling tool for indirect live-wire and method of operating the same25 Jun 2026US 2026/0176925 A1Korea Electric Power Corporation
- Piloting pulsed power drilling using a multi-actuator based floating electrode26 Feb 2026US 2026/0055665 A1Halliburton Energy Services.Inc.
- Increased drill bit or lower bha inertia for reducing hfto4 Sep 2025US 2025/0277411 A1Schlumberger Technology Corporation
- Systems and methods for ranging and tracking while drilling multiple geological wells8 May 2025US 2025/0146363 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Steerable rotary drilling systems281US 5,265,682 ACamco Drilling Group Limited · 1993
- Modulated bias units for steerable rotary drilling systems268US 5,553,678 ACamco International Inc. · 1996
- Directional drilling assembly and method189US 6,213,226 B1Halliburton Energy Services.Inc. · 2001
- Curved drilling apparatus148US 5,423,389 AAmoco Corporation · 1995
- Steerable rotary drag bit with longitudinally variable gage aggressiveness131US 5,967,247 ABaker Hughes Incorporated · 1999