E21B 7/128
From floating support with independent underwater anchored guide base
Official title: from floating support with independent underwater anchored guide base
E21B7/128 (From floating support with independent underwater anchored guide base) appears on 196 US grants and 82 published applications in this corpus.
Search patents in E21B- Granted patents
- 196
- Published applications
- 82
- Assignees
- 111
- Inventors
- 338
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 11 | 0 |
| 1978 | 7 | 0 |
| 1979 | 7 | 0 |
| 1980 | 12 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 8 | 0 |
| 1986 | 6 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 5 | 1 |
| 2003 | 3 | 3 |
| 2004 | 1 | 6 |
| 2005 | 2 | 4 |
| 2006 | 6 | 1 |
| 2007 | 2 | 1 |
| 2008 | 1 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 2 | 3 |
| 2014 | 1 | 8 |
| 2015 | 6 | 6 |
| 2016 | 8 | 5 |
| 2017 | 5 | 10 |
| 2018 | 6 | 5 |
| 2019 | 9 | 6 |
| 2020 | 3 | 6 |
| 2021 | 7 | 1 |
| 2022 | 2 | 5 |
| 2023 | 4 | 1 |
| 2024 | 3 | 3 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for heave compensation29 Sep 2026US 12,747,635 B2Schlumberger Technology Corporation
- Rigless drilling and wellhead installation20 May 2025US 12,305,513 B2Vetco Gray Scandinavia.AS
- Drill device8 Oct 2024US 12,110,767 B2Ye Sung Ocean Tech.,Ltd
- Method for offshore dual-drive core drilling with three layers of casings under surge compensation16 Apr 2024US 11,959,346 B2Guangzhou Marine Geological Survey
- Rigless drilling and wellhead installation20 Feb 2024US 11,905,831 B2Vetco Gray Scandinavia.AS
- Systems and methods for the detection of key seating wear in offshore drilling5 Jun 2025US 2025/0179906 A1
- Systems and methods for heave compensation12 Dec 2024US 2024/0410228 A1Schlumberger Technology Corporation
- Rigless drilling and wellhead installation2 May 2024US 2024/0141731 A1Vetco Gray Scandinavia AS
- Method for offshore dual-drive core drilling with three layers of casings under surge compensation22 Feb 2024US 2024/0060378 A1Guangzhou Marine Geological Survey
- Fully integrated flow control module14 Sep 2023US 2023/0287770 A1Baker Hughes Energy Technology UK Limited
Most cited
By later US patents
- Dynamically positioned, concentric riser, drilling method and apparatus213US 6,273,193 B1Transocean Sedco Forex, Inc. · 2001
- Gas lift system for marine drilling riser149US 4,099,583 AExxon Production Research Company · 1978
- Drilling fluid diverter system146US 4,063,602 AExxon Production Research Company · 1977
- Riserless mud return system99US 4,149,603 A1979
- Subsea wellbore drilling system for reducing bottom hole pressure97US 6,415,877 B1Deep Vision Inc. · 2002