E21B 7/208
Using down-hole drives
Official title: {using down-hole drives (E21B7/203 and E21B7/206 take precedence)}
E21B7/208 (Using down-hole drives) appears on 167 US grants and 108 published applications in this corpus.
Search patents in E21B- Granted patents
- 167
- Published applications
- 108
- Assignees
- 63
- Inventors
- 249
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 11 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 2 |
| 2002 | 3 | 7 |
| 2003 | 6 | 17 |
| 2004 | 10 | 8 |
| 2005 | 2 | 10 |
| 2006 | 13 | 1 |
| 2007 | 10 | 8 |
| 2008 | 5 | 5 |
| 2009 | 6 | 3 |
| 2010 | 2 | 1 |
| 2011 | 3 | 3 |
| 2012 | 2 | 3 |
| 2013 | 4 | 3 |
| 2014 | 3 | 2 |
| 2015 | 0 | 3 |
| 2016 | 3 | 4 |
| 2017 | 3 | 5 |
| 2018 | 5 | 5 |
| 2019 | 3 | 2 |
| 2020 | 3 | 2 |
| 2021 | 4 | 5 |
| 2022 | 2 | 2 |
| 2023 | 1 | 1 |
| 2024 | 2 | 3 |
| 2025 | 1 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Detachable fluidisation device9 Jun 2026US 12,649,998 B2GBM Works IP B.V.
- Expanding drill device10 Mar 2026US 12,571,263 B2Herrenknecht AG
- Fluid operated motor for running casing with bypass for pumping lost circulation material19 Aug 2025US 12,392,200 B2Deep Casing Tools, Ltd.
- Underwater drilling apparatus and method for creating a cased borehole underwater19 Nov 2024US 12,146,408 B2BAUER Maschinen GmbH
- Modified casing running tool and method of using the same23 Apr 2024US 11,965,385 B2Mccoy Global Inc.
- System and method for geothermal well installation2 Apr 2026US 2026/0092505 A1Schlumberger Technology Corporation
- Earth Drilling Device16 Oct 2025US 2025/0320780 A1TRACTO-TECHNIK GmbH & Co. KG
- Expanding drill device12 Jun 2025US 2025/0188805 A1Herrenknecht AG
- A detachable fluidisation device26 Dec 2024US 2024/0426072 A1GBM Works IP B.V.
- Fluid operated motor for running casing with bypass for pumping lost circulation material3 Oct 2024US 2024/0328260 A1Deep Casing Tools, Ltd.
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
- Drilling with casing and retrievable bit-motor assembly249US 5,472,057 AAtlantic Richfield Company · 1995
- Method and apparatus for horizontal drilling205US 5,148,875 ABaker Hughes Incorporated · 1992
- Method and apparatus for drilling boreholes in earth formations (drilling liner systems)204US 6,196,336 B1Baker Hughes Incorporated · 2001