E21B 7/20
Driving or forcing casings or pipes into boreholes
Official title: Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
E21B7/20 (Driving or forcing casings or pipes into boreholes) appears on 1,048 US grants and 818 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,048
- Published applications
- 818
- Assignees
- 369
- Inventors
- 1,518
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 14 | 0 |
| 1978 | 11 | 0 |
| 1979 | 11 | 0 |
| 1980 | 10 | 0 |
| 1981 | 5 | 0 |
| 1982 | 9 | 0 |
| 1983 | 10 | 0 |
| 1984 | 9 | 0 |
| 1985 | 11 | 0 |
| 1986 | 8 | 0 |
| 1987 | 14 | 0 |
| 1988 | 16 | 0 |
| 1989 | 16 | 0 |
| 1990 | 15 | 0 |
| 1991 | 16 | 0 |
| 1992 | 17 | 0 |
| 1993 | 21 | 0 |
| 1994 | 13 | 0 |
| 1995 | 10 | 0 |
| 1996 | 16 | 0 |
| 1997 | 10 | 0 |
| 1998 | 16 | 0 |
| 1999 | 14 | 0 |
| 2000 | 18 | 0 |
| 2001 | 17 | 11 |
| 2002 | 17 | 23 |
| 2003 | 19 | 33 |
| 2004 | 26 | 53 |
| 2005 | 17 | 48 |
| 2006 | 51 | 24 |
| 2007 | 36 | 34 |
| 2008 | 29 | 39 |
| 2009 | 21 | 40 |
| 2010 | 38 | 34 |
| 2011 | 32 | 39 |
| 2012 | 28 | 41 |
| 2013 | 35 | 31 |
| 2014 | 29 | 40 |
| 2015 | 30 | 39 |
| 2016 | 25 | 29 |
| 2017 | 37 | 38 |
| 2018 | 26 | 41 |
| 2019 | 37 | 32 |
| 2020 | 43 | 22 |
| 2021 | 34 | 29 |
| 2022 | 22 | 25 |
| 2023 | 20 | 16 |
| 2024 | 26 | 32 |
| 2025 | 20 | 18 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Wellbore installation apparatus and method of lower an apparatus to seabed16 Jun 2026US 12,655,706 B2Onesubsea, LLC
- Detachable fluidisation device9 Jun 2026US 12,649,998 B2GBM Works IP B.V.
- Pullback system for drilling tool7 Apr 2026US 12,595,703 B2Vermeer Manufacturing Company
- Casing drill bit facilitating drill-out thereof, and related methods of manufacture and use7 Apr 2026US 12,595,704 B2
- Apparatus and method for supporting a collar region of a blast hole during drilling31 Mar 2026US 12,590,496 B2Aquirian Technology Pty Ltd
- Drilling robot with an extrusion unit10 Sep 2026US 2026/0266139 A1ZHAW - Zürcher Hochschule Für Angewandte Wissenschaften
- Pullback system for drilling tool16 Jul 2026US 2026/0201752 A1Vermeer Manufacturing Company
- Water drill lance for extinguishing fire in container25 Jun 2026US 2026/0175058 A1TankTech, Inc.
- Reamer for horizontal directional drilling18 Jun 2026US 2026/0168332 A1Michels Corporation
- Wellbore installation apparatus and method of lower an apparatus to seabed30 Apr 2026US 2026/0117613 A1Aker Solutions Subsea AS
Most cited
By later US patents
- Method of creating a wellbore in an underground formation356US 5,348,095 AShell Oil Company · 1994
- Procedures and equipment for profiling and jointing of pipes319US 6,457,532 B1Weatherford/Lamb, Inc. · 2002
- 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
- Method of deep drilling249US 4,483,399 A1984