E21B 25/02
The core receiver being insertable into, or removable from, the borehole without
Official title: the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
E21B25/02 (The core receiver being insertable into, or removable from, the borehole without) appears on 216 US grants and 160 published applications in this corpus.
Search patents in E21B- Granted patents
- 216
- Published applications
- 160
- Assignees
- 121
- Inventors
- 327
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 3 |
| 2003 | 5 | 3 |
| 2004 | 5 | 2 |
| 2005 | 0 | 2 |
| 2006 | 2 | 1 |
| 2007 | 2 | 3 |
| 2008 | 2 | 1 |
| 2009 | 1 | 5 |
| 2010 | 1 | 3 |
| 2011 | 4 | 10 |
| 2012 | 5 | 9 |
| 2013 | 4 | 13 |
| 2014 | 11 | 11 |
| 2015 | 5 | 7 |
| 2016 | 11 | 9 |
| 2017 | 6 | 4 |
| 2018 | 9 | 10 |
| 2019 | 3 | 8 |
| 2020 | 9 | 10 |
| 2021 | 9 | 9 |
| 2022 | 9 | 14 |
| 2023 | 9 | 7 |
| 2024 | 8 | 5 |
| 2025 | 7 | 8 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Devices for marking a core sample25 Aug 2026US 12,716,309 B2Imdex Technologies Pty Ltd
- Method and system for enabling acquisition of borehole survey data and core orientation data18 Aug 2026US 12,709,955 B2Reflex Instruments Asia Pacific Pty Ltd
- Drilling head assembly with latching system and fluid retention mechanism12 May 2026US 12,624,604 B2
- Core sample handling device24 Feb 2026US 12,560,038 B2Coremax Limited
- Drilling system for recovering nearly undisturbed cores from loose to solid ground13 Jan 2026US 12,523,106 B2Stumatec AG
- Quick Release Inner Tube Connector for Core Retrieval10 Sep 2026US 2026/0266153 A1
- Method and system for determining core orientation16 Jul 2026US 2026/0201793 A1
- Core sample handling device12 Mar 2026US 2026/0071509 A1Coremax Limited
- Drilling head assembly with latching system and fluid retention mechanism7 Aug 2025US 2025/0250866 A1
- Devices for marking a core sample7 Aug 2025US 2025/0250874 A1Imdex Technologies Pty Ltd
Most cited
By later US patents
- Bit-stabilized combination coring and drilling system142US 5,568,838 ABaker Hughes Incorporated · 1996
- Drilling tool with retractable pilot drilling unit100US 5,038,873 ABaker Hughes Incorporated · 1991
- Telemetry method for cable-drilled boreholes and method for carrying it out86US 5,560,437 ABergwerksverband GmbH · 1996
- System for in situ replacement of cutting means for a ground drill86US 5,662,182 ADown Hole Technologies Pty. Ltd. · 1997
- System for in-situ replacement of cutting means for a ground drill80US 5,785,134 A1998