E21B 15/003
Supports for the drilling machine: adapted to be moved on their substructure
Official title: {adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells}
E21B15/003 (Supports for the drilling machine: adapted to be moved on their substructure) appears on 308 US grants and 308 published applications in this corpus.
Search patents in E21B- Granted patents
- 308
- Published applications
- 308
- Assignees
- 174
- Inventors
- 547
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 5 |
| 2003 | 2 | 8 |
| 2004 | 5 | 2 |
| 2005 | 2 | 1 |
| 2006 | 3 | 1 |
| 2007 | 1 | 1 |
| 2008 | 2 | 4 |
| 2009 | 1 | 6 |
| 2010 | 3 | 7 |
| 2011 | 0 | 5 |
| 2012 | 3 | 7 |
| 2013 | 10 | 17 |
| 2014 | 7 | 21 |
| 2015 | 20 | 20 |
| 2016 | 18 | 26 |
| 2017 | 21 | 25 |
| 2018 | 16 | 27 |
| 2019 | 28 | 30 |
| 2020 | 41 | 30 |
| 2021 | 14 | 20 |
| 2022 | 20 | 17 |
| 2023 | 20 | 8 |
| 2024 | 19 | 12 |
| 2025 | 7 | 4 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Hybrid coiled tubing/conventional drilling unit110US 5,842,530 ACanadian Fracmaster Ltd. · 1998
- Dual hoist derrick system for deep sea drilling97US 6,217,258 B1Japan Drilling Co., Ltd. · 2001
- Tubular transfer system70US 6,705,414 B2GlobalSantaFe Corporation · 2004
- Walking substructure device69US 5,921,336 AParker Drilling Company · 1999
- Auxiliary offshore rig and methods for using same62US 4,208,158 AFranklin Enterprises, Inc. · 1980