E21B 19/006
Including heave compensators
Official title: {including heave compensators}
E21B19/006 (Including heave compensators) appears on 331 US grants and 282 published applications in this corpus.
Search patents in E21B- Granted patents
- 331
- Published applications
- 282
- Assignees
- 155
- Inventors
- 481
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 1 | 0 |
| 1986 | 8 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 2 |
| 2002 | 7 | 8 |
| 2003 | 6 | 8 |
| 2004 | 11 | 8 |
| 2005 | 6 | 8 |
| 2006 | 7 | 8 |
| 2007 | 3 | 7 |
| 2008 | 7 | 3 |
| 2009 | 3 | 2 |
| 2010 | 3 | 2 |
| 2011 | 5 | 15 |
| 2012 | 5 | 16 |
| 2013 | 8 | 15 |
| 2014 | 11 | 20 |
| 2015 | 22 | 22 |
| 2016 | 24 | 27 |
| 2017 | 20 | 15 |
| 2018 | 21 | 29 |
| 2019 | 25 | 20 |
| 2020 | 16 | 18 |
| 2021 | 15 | 14 |
| 2022 | 10 | 6 |
| 2023 | 8 | 3 |
| 2024 | 4 | 2 |
| 2025 | 1 | 1 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Heave compensator enabling active heave counteraction15 Sep 2026US 12,735,302 B2Ernst-B. Johansen AS
- Well control system and method of use8 Sep 2026US 12,729,592 B2Deep Blue Oil & Gas Limited
- Riser suspension device with movement limiter21 Apr 2026US 12,607,076 B2Enhanced Drilling AS
- Multi-purpose compensator system14 Apr 2026US 12,601,229 B1Advanced Tool & Supply, LLC
- System and method for improved heave compensation24 Mar 2026US 12,584,534 B2Grant Prideco, L.P.
- System and method for improved heave compensation2 Jul 2026US 2026/0185586 A1Grant Prideco, L.P.
- Frequency based rig analysis30 Apr 2026US 2026/0117649 A1Exebenus AS
- Automated heave compensation15 Jan 2026US 2026/0015916 A1Weatherford Technology Holdings, LLC
- Riser suspension device with movement limiter13 Nov 2025US 2025/0347181 A1Enhanced Drilling AS
- Hydraulic stabilization device17 Oct 2024US 2024/0344536 A1Van Halteren Technologies Boxtel B.V.
Most cited
By later US patents
- Fluid assist bearing for telescopic joint of a RISER system144US 6,017,168 AABB Vetco Gray Inc. · 2000
- Upper marine riser package97US 4,712,620 AVetco Gray Inc. · 1987
- Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling93US 6,913,092 B2Weatherford/Lamb, Inc. · 2005
- Rocker arm marine tensioning system83US 6,585,455 B1Shell Oil Company · 2003
- Riser tensioner system for use on offshore platforms using elastomeric pads or helical metal compression springs81US 5,366,324 ALTV Energy Products Company · 1994