E21B 34/125
With time delay systems
Official title: {with time delay systems, e.g. hydraulic impedance mechanisms}
E21B34/125 (With time delay systems) appears on 21 US grants and 6 published applications in this corpus.
Search patents in E21B- Granted patents
- 21
- Published applications
- 6
- Assignees
- 10
- Inventors
- 34
- Latest grant
- 5 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 2 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Interventionless injection safety valve5 Nov 2024US 12,134,954 B2Schlumberger Technology Corporation
- Multiple system ports using a time delay valve3 Jan 2023US 11,542,780 B2Halliburton Energy Services.Inc.
- Hydraulic drilling jar with hydraulic lock piston24 Nov 2020US 10,844,683 B2Weatherford Technology Holdings, LLC
- Hydraulically-metered downhole position indicator26 Dec 2017US 9,850,752 B2Halliburton Energy Services.Inc.
- Delayed opening pressure actuated ported sub for subterranean use14 Nov 2017US 9,816,350 B2Baker Hughes, A Ge Company, LLC
- Interventionless injection safety valve13 Jul 2023US 2023/0220745 A1Schlumberger Technology Corporation
- Multiple system ports using a time delay valve11 Nov 2021US 2021/0348478 A1Halliburton Energy Services.Inc.
- Hydraulic Drilling Jar with Hydraulic Lock Piston3 Oct 2019US 2019/0301257 A1Weatherford Technology Holdings, LLC
- Stage tool28 Jun 2018US 2018/0179857 A1Packers Plus Energy Services Inc.
- Delayed Opening Pressure Actuated Ported Sub for Subterranean Use5 Nov 2015US 2015/0315873 A1Baker Hughes Incorporated
Most cited
By later US patents
- Apparatus for testing and sampling open-hole oil and gas wells70US 5,826,662 AHalliburton Energy Services.Inc. · 1998
- Well isolation system49US 6,041,864 ASchlumberger Technology Corporation · 2000
- Tool for treating subterranean wells37US 4,913,231 ADowell Schlumberger Incorporated · 1990
- Tool for treating subterranean wells28US 5,020,592 ADowell Schlumberger Incorporated · 1991
- Deflate-equalizing valve apparatus for inflatable packer formation tester23US 4,424,860 ASchlumberger Technology Corporation · 1984