E21B 49/081
With down-hole means for trapping a fluid sample
Official title: {with down-hole means for trapping a fluid sample (E21B49/10 takes precedence)}
E21B49/081 (With down-hole means for trapping a fluid sample) appears on 649 US grants and 592 published applications in this corpus.
Search patents in E21B- Granted patents
- 649
- Published applications
- 592
- Assignees
- 134
- Inventors
- 1,041
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 7 | 0 |
| 1989 | 9 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 5 | 0 |
| 1994 | 14 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 8 | 0 |
| 1999 | 9 | 0 |
| 2000 | 9 | 0 |
| 2001 | 14 | 0 |
| 2002 | 18 | 16 |
| 2003 | 10 | 10 |
| 2004 | 7 | 17 |
| 2005 | 5 | 8 |
| 2006 | 16 | 8 |
| 2007 | 11 | 12 |
| 2008 | 4 | 16 |
| 2009 | 12 | 22 |
| 2010 | 16 | 25 |
| 2011 | 17 | 19 |
| 2012 | 17 | 15 |
| 2013 | 14 | 29 |
| 2014 | 20 | 40 |
| 2015 | 22 | 35 |
| 2016 | 33 | 42 |
| 2017 | 30 | 30 |
| 2018 | 22 | 35 |
| 2019 | 38 | 30 |
| 2020 | 35 | 35 |
| 2021 | 34 | 32 |
| 2022 | 26 | 32 |
| 2023 | 32 | 18 |
| 2024 | 32 | 27 |
| 2025 | 29 | 26 |
| 2026 | 16 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for downhole fluid microsample collection with staged hydraulic actuation22 Sep 2026US 12,742,386 B2Halliburton Energy Services.Inc.
- Passive diffusion bag samplers with improved performance18 Aug 2026US 12,710,340 B2Aeris Scientific, LLC
- Sampling through perforation guns with flushing28 Jul 2026US 12,692,786 B2Schlumberger Technology Corporation
- Intelligent treatment device for downhole gas invasion while drilling16 Jun 2026US 12,654,129 B1Chengdu University of Technology
- Pressure tuned infrared light emitting diode for downhole spectroscopy19 May 2026US 12,631,111 B2Baker Hughes Oilfield Operations LLC
- Real time downhole api determination24 Sep 2026US 2026/0286843 A1Schlumberger Technology Corporation
- Dynamic multi-flowline control system for downhole tools17 Sep 2026US 2026/0275864 A1Schlumberger Technology Corporation
- Formation fluid sampling using probe with inflatable pad27 Aug 2026US 2026/0251062 A1Halliburton Energy Services.Inc.
- Tubing or casing conveyed fluid sampling system23 Jul 2026US 2026/0210244 A1Halliburton Energy Services.Inc.
- A device and method for measuring pressure in immiscible fluids in a subterranean reservoir9 Jul 2026US 2026/0193982 A1Hydrophilic AS
Most cited
By later US patents
- Down hole tool for determination of formation properties330US 4,860,581 ASchlumberger Technology Corporation · 1989
- Dual-pump formation fracturing222US 9,556,721 B2Schlumberger Technology Corporation · 2017
- Permanent optical sensor downhole fluid analysis systems147US 6,437,326 B1Schlumberger Technology Corporation · 2002
- Downhole fluid property measurement tool144US 5,329,811 AHalliburton Company · 1994
- Early evaluation system with pump and method of servicing a well128US 5,799,733 AHalliburton Energy Services.Inc. · 1998