E21B 10/32
With expansible cutting tools
Official title: with expansible cutting tools
E21B10/32 (With expansible cutting tools) appears on 591 US grants and 485 published applications in this corpus.
Search patents in E21B- Granted patents
- 591
- Published applications
- 485
- Assignees
- 179
- Inventors
- 813
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 12 | 0 |
| 1984 | 7 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 9 | 0 |
| 1990 | 4 | 0 |
| 1991 | 10 | 0 |
| 1992 | 8 | 0 |
| 1993 | 13 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 2 | 0 |
| 2002 | 7 | 9 |
| 2003 | 8 | 10 |
| 2004 | 6 | 20 |
| 2005 | 11 | 6 |
| 2006 | 11 | 10 |
| 2007 | 7 | 15 |
| 2008 | 14 | 16 |
| 2009 | 8 | 12 |
| 2010 | 18 | 30 |
| 2011 | 17 | 28 |
| 2012 | 22 | 27 |
| 2013 | 23 | 29 |
| 2014 | 22 | 40 |
| 2015 | 29 | 26 |
| 2016 | 25 | 22 |
| 2017 | 21 | 28 |
| 2018 | 21 | 19 |
| 2019 | 23 | 29 |
| 2020 | 32 | 17 |
| 2021 | 20 | 22 |
| 2022 | 23 | 21 |
| 2023 | 20 | 15 |
| 2024 | 16 | 14 |
| 2025 | 21 | 12 |
| 2026 | 5 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Devices, systems, and methods for identifying a radial position of an expandable tool29 Sep 2026US 12,747,663 B1Schlumberger Technology Corporation
- Drilling head assembly with latching system and fluid retention mechanism12 May 2026US 12,624,604 B2
- Brake and wear indicator for expandable downhole tool27 Jan 2026US 12,534,961 B2Schlumberger Technology Corporation
- Microtunneling apparatus27 Jan 2026US 12,534,963 B2OptionX Holdings Pty Ltd
- Microtunneling apparatus13 Jan 2026US 12,523,103 B2OptionX Holdings Pty Ltd
- Wellbore controllable chamber-forming granular-flow mining system6 Aug 2026US 2026/0226817 A1Blueland Technology Limited
- Brake and wear indicator for expandable downhole tool4 Jun 2026US 2026/0153002 A1Schlumberger Technology Corporation
- Device and its application method for in-situ cutting soil in borehole7 May 2026US 2026/0125952 A1Chang An University
- System and method for geothermal well installation2 Apr 2026US 2026/0092505 A1Schlumberger Technology Corporation
- Post Hole Belling Auger5 Feb 2026US 2026/0035873 A1Jess Tools, LLC
Most cited
By later US patents
- Drilling with casing and retrievable drill bit314US 5,271,472 AAtlantic Richfield Company · 1993
- Drilling with casing and retrievable drill bit289US 5,197,553 AAtlantic Richfield Company · 1993
- Expandable underreamer/stabilizer271US 6,732,817 B2Smith International, Inc. · 2004
- Cutter blades for rotary tubing tools210US 5,242,017 A1993
- Combination mill and drill bit197US 6,131,675 ABaker Hughes Incorporated · 2000