E21B 17/085
Riser connections
Official title: {Riser connections (connectors for wellhead E21B33/038)}
E21B17/085 (Riser connections) appears on 336 US grants and 270 published applications in this corpus.
Search patents in E21B- Granted patents
- 336
- Published applications
- 270
- Assignees
- 174
- Inventors
- 571
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 9 | 0 |
| 1979 | 1 | 0 |
| 1980 | 8 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 7 | 7 |
| 2003 | 4 | 4 |
| 2004 | 1 | 2 |
| 2005 | 1 | 3 |
| 2006 | 1 | 2 |
| 2007 | 0 | 9 |
| 2008 | 6 | 7 |
| 2009 | 0 | 10 |
| 2010 | 9 | 10 |
| 2011 | 10 | 15 |
| 2012 | 7 | 14 |
| 2013 | 12 | 15 |
| 2014 | 19 | 19 |
| 2015 | 17 | 18 |
| 2016 | 17 | 17 |
| 2017 | 17 | 13 |
| 2018 | 13 | 12 |
| 2019 | 12 | 12 |
| 2020 | 13 | 15 |
| 2021 | 11 | 17 |
| 2022 | 23 | 13 |
| 2023 | 19 | 16 |
| 2024 | 12 | 11 |
| 2025 | 12 | 2 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Well control system and method of use8 Sep 2026US 12,729,592 B2Deep Blue Oil & Gas Limited
- Connector for subsea pipelines and risers, and repair of a pipeline or riser utilizing the connector5 May 2026US 12,618,504 B2
- Steel wire pre-embedded integrated full-bore acid fracturing hose assembly and preparation method thereof30 Dec 2025US 12,510,195 B1Qingdao Qingflex Hose Factory
- Robotic system for making or breaking a riser7 Oct 2025US 12,435,582 B2Stebbins Innovations, LLC
- Offshore drilling apparatus and methods30 Sep 2025US 12,428,918 B2Expro North Sea Limited
- Lateral clamping module for rigid risers24 Sep 2026US 2026/0286788 A1Petroleo Brasileiro S.A. - Petrobras
- Multi-purpose robot end effector for riser running process activities24 Sep 2026US 2026/0286790 A1Grant Prideco, lnc.
- Connector assemblies and processes for using same27 Aug 2026US 2026/0251236 A1Koil Energy Solutions, Inc.
- Wellhead attachment system30 Jul 2026US 2026/0218583 A1Vault Pressure Control LLC
- A release adapter for an end-fitting and a subsea connector assembly23 Jul 2026US 2026/0210194 A1S3N Ventus Ltd
Most cited
By later US patents
- Remotely operable releasable pipe connector134US 4,611,662 AAmoco Corporation · 1986
- Well apparatus and method122US 4,995,464 ADril-Quip, Inc. · 1991
- Anti-rotation tubular connection for flowlines or the like110US 4,693,498 AMobil Oil Corporation · 1987
- Multiple-seal underwater pipe-riser connector101US 5,505,502 AShell Oil Company · 1996
- Upper marine riser package97US 4,712,620 AVetco Gray Inc. · 1987