E21B 33/0387
Hydraulic stab connectors
Official title: {Hydraulic stab connectors}
E21B33/0387 (Hydraulic stab connectors) appears on 158 US grants and 104 published applications in this corpus.
Search patents in E21B- Granted patents
- 158
- Published applications
- 104
- Assignees
- 80
- Inventors
- 241
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 2 |
| 2002 | 2 | 1 |
| 2003 | 5 | 1 |
| 2004 | 0 | 3 |
| 2005 | 1 | 2 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 0 | 4 |
| 2009 | 4 | 7 |
| 2010 | 4 | 11 |
| 2011 | 5 | 10 |
| 2012 | 10 | 13 |
| 2013 | 12 | 4 |
| 2014 | 6 | 3 |
| 2015 | 3 | 5 |
| 2016 | 6 | 3 |
| 2017 | 4 | 6 |
| 2018 | 4 | 4 |
| 2019 | 3 | 7 |
| 2020 | 7 | 3 |
| 2021 | 1 | 1 |
| 2022 | 4 | 5 |
| 2023 | 5 | 3 |
| 2024 | 0 | 1 |
| 2025 | 2 | 0 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stab and hinge over system and methods of use thereof12 May 2026US 12,624,616 B1OneSubsea IP UK Limited
- Stab and hinge over system and methods of use thereof12 May 2026US 12,624,617 B1OneSubsea IP UK Limited
- Single line quick connector (SQC), a system comprising the single line quick connector and method of operating22 Jul 2025US 12,366,132 B2
- Pressure seal with built in testing system8 Jul 2025US 12,352,659 B2Expro North Sea Limited
- Systems and methods for tethering subsea Blow-Out-Preventers21 Nov 2023US 11,821,279 B2Trendsetter Vulcan Offshore, Inc.
- Connector assemblies and processes for using same9 Jul 2026US 2026/0194172 A1Koil Energy Solutions, Inc.
- ROV operated Hotstab11 Jan 2024US 2024/0010305 A1Oceaneering International, Inc.
- Single Line Quick Connector (SQC), a System Comprising the Single Line Quick Connector and Method of Operating18 May 2023US 2023/0151708 A1FMC Kongsberg Subsea AS
- Systems and Methods for Tethering Subsea Blow-Out-Preventers11 May 2023US 2023/0144686 A1Trendsetter Vulcan Offshore, Inc.
- Subsea Blind Stab Device16 Mar 2023US 2023/0079184 A1FMC Kongsberg Subsea AS
Most cited
By later US patents
- Tubing hanger vent65US 5,868,204 AABB Vetco Gray Inc. · 1999
- Subsea connector system and method for coupling subsea conduits52US 5,730,551 AFMC Corporation · 1998
- Subsea flowline connector50US 4,200,312 ARegan Offshore International, Inc. · 1980
- Subsea hydraulic coupling50US 4,637,470 AHughes Tool Company · 1987
- Modular subsea control system47US 6,644,410 B12003