E21B 43/013
Connecting a production flow line to an underwater well head
E21B43/013 (Connecting a production flow line to an underwater well head) appears on 447 US grants and 315 published applications in this corpus.
Search patents in E21B- Granted patents
- 447
- Published applications
- 315
- Assignees
- 194
- Inventors
- 727
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 11 | 0 |
| 1981 | 10 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 15 | 0 |
| 1985 | 5 | 0 |
| 1986 | 17 | 0 |
| 1987 | 14 | 0 |
| 1988 | 5 | 0 |
| 1989 | 10 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 8 |
| 2002 | 9 | 7 |
| 2003 | 9 | 6 |
| 2004 | 7 | 7 |
| 2005 | 2 | 2 |
| 2006 | 7 | 9 |
| 2007 | 3 | 2 |
| 2008 | 3 | 6 |
| 2009 | 4 | 9 |
| 2010 | 3 | 9 |
| 2011 | 3 | 13 |
| 2012 | 8 | 14 |
| 2013 | 7 | 10 |
| 2014 | 14 | 20 |
| 2015 | 20 | 16 |
| 2016 | 19 | 15 |
| 2017 | 14 | 15 |
| 2018 | 16 | 29 |
| 2019 | 17 | 21 |
| 2020 | 18 | 16 |
| 2021 | 17 | 31 |
| 2022 | 20 | 15 |
| 2023 | 17 | 9 |
| 2024 | 15 | 7 |
| 2025 | 11 | 10 |
| 2026 | 6 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Subsea pumping and booster system19 May 2026US 12,631,096 B2Baker Hughes Energy Technology UK Limited
- 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
- Tie-in of subsea pipeline24 Feb 2026US 12,560,056 B2Equinor Energy AS
- Lightweight flow module13 Jan 2026US 12,523,110 B2FMC Technologies, Inc.
- Subsea pumping and booster system17 Sep 2026US 2026/0275839 A1Baker Hughes Energy Technology UK Limited
- Offshore fluid handling23 Jul 2026US 2026/0210190 A1Aker Solutions Subsea AS
- Installation of subsea risers16 Jul 2026US 2026/0201755 A1Subsea 7 Norway AS
- Connector assemblies and processes for using same9 Jul 2026US 2026/0194172 A1Koil Energy Solutions, Inc.
- Subsea fluid transfer system and process for using the same25 Jun 2026US 2026/0176938 A1Koil Energy Solutions, Inc.
Most cited
By later US patents
- Method for remotely launching subsea pigs in response to wellhead pressure change97US 6,022,421 ASonsub International Ltd. · 2000
- Insert tree81US 5,971,077 AABB Vetco Gray Inc. · 1999
- Flowline connector with subsea equipment package74US 6,481,504 B1FMC Corporation · 2002
- Remotely operable horizontal connection apparatus and method65US 5,255,745 ACooper Industries, Inc. · 1993
- Underwater Christmas tree cap and lockdown apparatus63US 4,405,016 ASmith International, Inc. · 1983