E21B 17/017
Bend restrictors for limiting stress on risers
Official title: {Bend restrictors for limiting stress on risers}
E21B17/017 (Bend restrictors for limiting stress on risers) appears on 147 US grants and 150 published applications in this corpus.
Search patents in E21B- Granted patents
- 147
- Published applications
- 150
- Assignees
- 97
- Inventors
- 349
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 0 |
| 2003 | 2 | 1 |
| 2004 | 1 | 6 |
| 2005 | 1 | 4 |
| 2006 | 2 | 1 |
| 2007 | 2 | 4 |
| 2008 | 2 | 9 |
| 2009 | 2 | 8 |
| 2010 | 2 | 8 |
| 2011 | 5 | 11 |
| 2012 | 4 | 11 |
| 2013 | 5 | 9 |
| 2014 | 8 | 5 |
| 2015 | 8 | 7 |
| 2016 | 8 | 9 |
| 2017 | 8 | 12 |
| 2018 | 7 | 5 |
| 2019 | 11 | 3 |
| 2020 | 3 | 7 |
| 2021 | 7 | 9 |
| 2022 | 6 | 3 |
| 2023 | 5 | 7 |
| 2024 | 3 | 4 |
| 2025 | 4 | 2 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Connector assembly for emergency decoupling of a subsea end fitting of a movable subsea structure29 Sep 2026US 12,747,653 B2S3N Ventus Ltd
- Hydraulic actuation system for diverless bell mouth18 Aug 2026US 12,710,113 B2Petroleo Brasileiro S.A. - Petrobras
- Umbilical10 Mar 2026US 12,571,286 B2Onesubsea, LLC
- Connector assemblies and processes for using same3 Mar 2026US 12,565,944 B1Koil Energy Solutions, Inc.
- Segmented bend restrictor system with full disassembly capability24 Feb 2026US 12,562,558 B2Panduit Corp.
- Connector assemblies and processes for using same27 Aug 2026US 2026/0251236 A1Koil Energy Solutions, Inc.
- Connector assembly20 Aug 2026US 2026/0243136 A1BMS Design Limited
- A connector assembly for emergency decoupling of a subsea end fitting of a movable subsea structure16 Jul 2026US 2026/0201777 A1S3N Ventus Ltd
- External reinforcement structural apparatus for supporting bend stiffener and method of installing the structural apparatus in an operational environment11 Jun 2026US 2026/0160138 A1Petroleo Brasileiro S.A. - Petrobras
- Segmented bend restrictor system with full disassembly capability28 May 2026US 2026/0149255 A1Panduit Corp.
Most cited
By later US patents
- Marine riser51US 4,909,327 AHydril Company · 1990
- Riser system for sub-sea wells and method of operation45US 6,276,456 B12001
- Enhanced steel catenary riser system38US 6,062,769 AFMC Corporation · 2000
- Device for limiting the bending radius of a flexible duct37US 6,220,303 B1Coflexip · 2001
- Riser35US 4,188,156 ACameron Iron Works, Inc. · 1980