E21B 19/162
Cathead actuated
Official title: {cathead actuated}
E21B19/162 (Cathead actuated) appears on 11 US grants and 4 published applications in this corpus.
Search patents in E21B- Granted patents
- 11
- Published applications
- 4
- Assignees
- 5
- Inventors
- 15
- Latest grant
- 3 Nov 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Apparatus and methods for tong operation3 Nov 2020US 10,822,893 B2Weatherford Technology Holdings, LLC
- Apparatus and methods for tong operation12 Nov 2019US 10,472,906 B2Weatherford Technology Holdings, LLC
- Top drive with mounted winch3 Nov 2015US 9,175,526 B2Tesco Corporation
- System for measuring the torque applied to a threaded connection between sections of oilfield pipe23 Apr 1996US 5,509,316 AConnection Technology, Ltd.
- Pipe spinner assembly17 Mar 1987US 4,649,778 A
- Apparatus and methods for tong operation5 Mar 2020US 2020/0072002 A1Weatherford Technology Holdings, LLC
- Apparatus and methods for tong operation21 Feb 2019US 2019/0055796 A1Weatherford Technology Holdings, LLC
- Top drive with mounted winch9 May 2013US 2013/0112430 A1Tesco Corporation
- Device for Handling Pipes9 Apr 2009US 2009/0090221 A1
Most cited
By later US patents
- Torque control system for catheads19US 4,444,273 A1984
- System for measuring the torque applied to a threaded connection between sections of oilfield pipe14US 5,509,316 AConnection Technology, Ltd. · 1996
- Method and apparatus for use in drill string make up12US 4,501,335 A1985
- Method and apparatus for torque monitoring12US 4,567,779 AAnalog Data Systems · 1986
- Top drive with mounted winch7US 9,175,526 B2Tesco Corporation · 2015