E21B 49/082
Wire-line fluid samplers
Official title: {Wire-line fluid samplers (E21B49/083 takes precedence)}
E21B49/082 (Wire-line fluid samplers) appears on 193 US grants and 159 published applications in this corpus.
Search patents in E21B- Granted patents
- 193
- Published applications
- 159
- Assignees
- 57
- Inventors
- 385
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 0 |
| 2002 | 6 | 7 |
| 2003 | 5 | 5 |
| 2004 | 1 | 5 |
| 2005 | 1 | 1 |
| 2006 | 6 | 2 |
| 2007 | 2 | 2 |
| 2008 | 1 | 2 |
| 2009 | 1 | 3 |
| 2010 | 2 | 7 |
| 2011 | 4 | 4 |
| 2012 | 3 | 6 |
| 2013 | 5 | 5 |
| 2014 | 5 | 13 |
| 2015 | 7 | 9 |
| 2016 | 11 | 8 |
| 2017 | 10 | 11 |
| 2018 | 7 | 23 |
| 2019 | 13 | 7 |
| 2020 | 13 | 7 |
| 2021 | 13 | 13 |
| 2022 | 4 | 6 |
| 2023 | 8 | 3 |
| 2024 | 9 | 5 |
| 2025 | 3 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pressure compensated locking sampling tool10 Mar 2026US 12,571,306 B1Schlumberger Technology Corporation
- Downhole segregation for wireline formation fluid sampling24 Feb 2026US 12,560,083 B2Schlumberger Technology Corporation
- Wellbore probe movement control28 Oct 2025US 12,454,890 B2Halliburton Energy Services.Inc.
- Zero flaring zonal formation testing with drill stem testing capabilities2 Sep 2025US 12,404,768 B2Schlumberger Technology Corporation
- Real time downhole water chemistry and uses15 Jul 2025US 12,359,565 B2ConocoPhillips Company
- Real time downhole api determination24 Sep 2026US 2026/0286843 A1Schlumberger Technology Corporation
- Tubing or casing conveyed fluid sampling system23 Jul 2026US 2026/0210244 A1Halliburton Energy Services.Inc.
- Pressure compensated locking sampling tool12 Mar 2026US 2026/0071541 A1Schlumberger Technology Corporation
- Probe and method for sampling fluids from a subterranean environment5 Feb 2026US 2026/0036047 A1Schlumberger Technology Corporation
- Downhole segregation for wireline formation fluid sampling6 Feb 2025US 2025/0043682 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Wellbore fluid sampler and method109US 5,058,674 AHalliburton Company · 1991
- Methods of downhole testing subterranean formations and associated apparatus therefor90US 6,325,146 B1Halliburton Energy Services.Inc. · 2001
- Early evaluation system81US 5,540,280 AHalliburton Company · 1996
- Reduced contamination sampling72US 6,659,177 B2Schlumberger Technology Corporation · 2003
- Sample chamber with dead volume flushing68US 6,467,544 B1Schlumberger Technology Corporation · 2002