E21B 7/043
For underwater installations
Official title: {for underwater installations}
E21B7/043 (For underwater installations) appears on 60 US grants and 21 published applications in this corpus.
Search patents in E21B- Granted patents
- 60
- Published applications
- 21
- Assignees
- 37
- Inventors
- 99
- Latest grant
- 18 Jan 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 2 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Systems and methods for sensorless state estimation, disturbance estimation, and model adaption for rotary steerable drilling systems18 Jan 2022US 11,225,834 B2Halliburton Energy Services.Inc.
- Device and method for solid-state fluidized mining of natural gas hydrates in shallow seabed3 Nov 2020US 10,822,927 B2Southwest Petroleum University
- Crustal and disturbance field survey correction10 Sep 2019US 10,408,055 B2ConocoPhillips Company
- Subsea slanted wellhead system and BOP system with dual injector head units27 Feb 2018US 9,903,172 B2Aarbakke Innovation AS
- Inclined conductor device7 Feb 2017US 9,564,748 B2NeoDrill AS
- Device and method for solid-state fluidized mining of natural gas hydrates in shallow seabed6 Feb 2020US 2020/0040710 A1Southwest Petroleum University
- Real-time optimization and visualization of parameters for drilling operations14 Feb 2019US 2019/0048703 A1Landmark Graphics Corporation
- Systems and Methods for Sensorless State Estimation, Disturbance Estimation, and Model Adaption for Rotary Steerable Drilling Systems8 Mar 2018US 2018/0066475 A1Halliburton Energy Services.Inc.
- Subsea slanted wellhead system and bop system with dual injector head units23 Nov 2017US 2017/0335649 A1Aarbakke Innovation AS
- Crustal and disturbance field survey correction22 Dec 2016US 2016/0369625 A1ConocoPhillips Company
Most cited
By later US patents
- Method of replacing a corroded well conductor in an offshore platform115US 4,526,232 AShell Offshore Inc. · 1985
- Internal elevator94US 4,320,915 AVarco International, Inc. · 1982
- Template and process for drilling and completing multiple wells76US 5,330,007 AMarathon Oil Company · 1994
- Assembly and process for drilling and completing multiple wells64US 5,878,815 AMarathon Oil Company · 1999
- Monopod drilling platform with directional drilling53US 4,030,310 ASea-Log Corporation · 1977