E21B 7/122
With submersible vertically movable guide
Official title: {with submersible vertically movable guide}
E21B7/122 (With submersible vertically movable guide) appears on 18 US grants and 10 published applications in this corpus.
Search patents in E21B- Granted patents
- 18
- Published applications
- 10
- Assignees
- 15
- Inventors
- 40
- Latest grant
- 8 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 2 | 3 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Nearshore subsea drilling8 Aug 2023US 11,719,049 B2Fnv IP B.V.
- Bend stiffener20 Dec 2022US 11,530,578 B2CRP Subsea Limited
- Semi-submersible drilling vessel, e.g. for use in a harsh environment5 Jul 2022US 11,377,172 B2Itrec B V
- Wireline coring recovery system of a seafloor drilling rig and method of using same22 Jun 2021US 11,041,344 B1Hunan University of Science and Technology
- Electronic release tool13 Apr 2021US 10,975,650 B2Hunting Titan, Inc.
- Method for providing a subsea template system with a tail pipe and a subsea template system4 Dec 2025US 2025/0369316 A1
- Offshore horizontal directional drilling installation frame, system, and method31 Aug 2023US 2023/0272673 A1
- Nearshore Subsea Drilling29 Dec 2022US 2022/0412168 A1Fnv IP B.V.
- Wireline coring recovery system of a seafloor drilling rig and method of using same3 Jun 2021US 2021/0164300 A1Hunan University of Science and Technology
- Bend Stiffener11 Mar 2021US 2021/0071480 A1Trelleborg Offshore U.K. Ltd.
Most cited
By later US patents
- Remotely operated water bottom based drilling system using cable for auxiliary operations22US 7,380,614 B1Williamson & Associates, Inc. · 2008
- Rising centralizing spider20US 5,479,990 AShell Oil Company · 1996
- Subsea drilling template with carousel guidance system19US 4,174,011 AStandard Oil Company (Indiana) · 1979
- Drilling apparatus18US 3,961,673 AMaschinen- und Bohrgerate-Fabrik Alfred Wirth & Co., K.G. · 1976
- Offshore drilling of large diameter holes in rock formations14US 4,470,468 ARaymond International Builders, Inc. · 1984