E21B 17/015
Non-vertical risers
Official title: {Non-vertical risers, e.g. articulated or catenary-type}
E21B17/015 (Non-vertical risers) appears on 264 US grants and 223 published applications in this corpus.
Search patents in E21B- Granted patents
- 264
- Published applications
- 223
- Assignees
- 127
- Inventors
- 522
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 16 | 0 |
| 2001 | 12 | 4 |
| 2002 | 13 | 9 |
| 2003 | 5 | 3 |
| 2004 | 8 | 9 |
| 2005 | 3 | 8 |
| 2006 | 3 | 5 |
| 2007 | 5 | 7 |
| 2008 | 4 | 14 |
| 2009 | 5 | 5 |
| 2010 | 6 | 15 |
| 2011 | 6 | 18 |
| 2012 | 6 | 12 |
| 2013 | 10 | 11 |
| 2014 | 11 | 15 |
| 2015 | 19 | 17 |
| 2016 | 18 | 14 |
| 2017 | 12 | 10 |
| 2018 | 7 | 5 |
| 2019 | 10 | 7 |
| 2020 | 4 | 3 |
| 2021 | 3 | 5 |
| 2022 | 4 | 5 |
| 2023 | 6 | 7 |
| 2024 | 2 | 9 |
| 2025 | 10 | 3 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Diverless unified support tube3 Mar 2026US 12,565,815 B2Petroleo Brasileiro S.A. - Petrobras
- Installation of subsea risers26 Aug 2025US 12,398,599 B2Subsea 7 do Brasil Servicos Ltda
- Subsea risers29 Jul 2025US 12,371,949 B2Subsea 7 do Brasil Servicos Ltda
- Off shore rigid steel riser termination and fixation system to floating production storage offloading (FPSO) vessel1 Jul 2025US 12,345,104 B2Saipem S.P.A.
- Off shore rigid steel riser termination and fixation system to Floating Production Storage Offloading (FPSO) vessel24 Jun 2025US 12,338,694 B2Saipem S.P.A.
- Connector assembly20 Aug 2026US 2026/0243136 A1BMS Design Limited
- Installation of subsea risers16 Jul 2026US 2026/0201755 A1Subsea 7 Norway AS
- A connector assembly for emergency decoupling of a subsea end fitting of a movable subsea structure16 Jul 2026US 2026/0201777 A1S3N Ventus Ltd
- Improving fatigue resistance of steel catenary risers27 Nov 2025US 2025/0361776 A1Subsea 7 do Brasil Servicos Ltda
- Pipe protection sleeve16 Oct 2025US 2025/0320949 A1Oceaneering International, Inc.
Most cited
By later US patents
- Flexible pipe131US 4,383,554 AMobil Oil Corporation · 1983
- Method and system for maintenance and servicing of subsea wells70US 4,730,677 AOtis Engineering Corporation · 1988
- Flexible pipe for riser in off-shore oil production66US 6,123,114 ACoflexip · 2000
- Method and apparatus for production of subsea hydrocarbons using a floating vessel62US 4,556,340 AConoco Inc. · 1985
- Direct electric pipeline heating62US 6,142,707 AShell Oil Company · 2000