E21B 33/043
Specially adapted for underwater well heads
Official title: specially adapted for underwater well heads ({E21B33/0407,} E21B33/047 take precedence)
E21B33/043 (Specially adapted for underwater well heads) appears on 541 US grants and 368 published applications in this corpus.
Search patents in E21B- Granted patents
- 541
- Published applications
- 368
- Assignees
- 132
- Inventors
- 668
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 10 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 9 | 0 |
| 1986 | 9 | 0 |
| 1987 | 12 | 0 |
| 1988 | 8 | 0 |
| 1989 | 13 | 0 |
| 1990 | 17 | 0 |
| 1991 | 11 | 0 |
| 1992 | 9 | 0 |
| 1993 | 15 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 8 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 10 | 0 |
| 2001 | 8 | 6 |
| 2002 | 15 | 13 |
| 2003 | 18 | 16 |
| 2004 | 12 | 21 |
| 2005 | 4 | 17 |
| 2006 | 20 | 14 |
| 2007 | 10 | 8 |
| 2008 | 15 | 9 |
| 2009 | 5 | 6 |
| 2010 | 4 | 10 |
| 2011 | 9 | 15 |
| 2012 | 9 | 14 |
| 2013 | 13 | 26 |
| 2014 | 17 | 15 |
| 2015 | 20 | 21 |
| 2016 | 22 | 14 |
| 2017 | 12 | 14 |
| 2018 | 17 | 15 |
| 2019 | 15 | 16 |
| 2020 | 13 | 19 |
| 2021 | 24 | 15 |
| 2022 | 8 | 15 |
| 2023 | 15 | 15 |
| 2024 | 23 | 11 |
| 2025 | 17 | 14 |
| 2026 | 9 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High torque actuated tubing hanger orientation11 Aug 2026US 12,704,037 B2FMC Kongsberg Subsea AS
- Space-out mechanism for a tubing hanger and a tree14 Jul 2026US 12,680,409 B2Innovex International, Inc.
- Tubing hanger alignment device with flanged end9 Jun 2026US 12,650,053 B2Innovex International, Inc.
- Rigidized seal assembly using automated space-out mechanism19 May 2026US 12,631,083 B2Innovex International, Inc.
- Tubing hanger alignment device and space-out mechanism17 Mar 2026US 12,577,846 B2Innovex International, Inc.
- Space-Out Mechanism for a Tubing Hanger and a Tree8 Oct 2026US 2026/0308996 A1Innovex International, Inc.
- Rigidized Seal Assembly Using Automated Space-Out Mechanism16 Jul 2026US 2026/0201767 A1Innovex International, Inc.
- Tubing Hanger Alignment Device and Space-Out Mechanism9 Jul 2026US 2026/0193953 A1Innovex International, Inc.
- Subsea stroking tool4 Jun 2026US 2026/0153008 A1
- Tensioned wellhead systems and related methods7 May 2026US 2026/0125962 A1Onesubsea, LLC
Most cited
By later US patents
- Metal-to-metal annulus packoff for a subsea wellhead system167US 5,174,376 AFMC Corporation · 1992
- Wellhead138US 5,544,707 ACooper Cameron Corporation · 1996
- Well apparatus and method122US 4,995,464 ADril-Quip, Inc. · 1991
- Device for inserting tubular members together116US 5,095,991 AVetco Gray Inc. · 1992
- Tree test plug108US 5,775,422 AFMC Corporation · 1998