E21B 49/086
Withdrawing samples at the surface
Official title: {Withdrawing samples at the surface}
E21B49/086 (Withdrawing samples at the surface) appears on 180 US grants and 179 published applications in this corpus.
Search patents in E21B- Granted patents
- 180
- Published applications
- 179
- Assignees
- 86
- Inventors
- 407
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 2 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 6 |
| 2013 | 1 | 5 |
| 2014 | 1 | 4 |
| 2015 | 6 | 9 |
| 2016 | 5 | 21 |
| 2017 | 9 | 18 |
| 2018 | 19 | 20 |
| 2019 | 11 | 18 |
| 2020 | 16 | 8 |
| 2021 | 19 | 16 |
| 2022 | 16 | 13 |
| 2023 | 11 | 9 |
| 2024 | 9 | 7 |
| 2025 | 10 | 14 |
| 2026 | 6 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Predicted bias correction for drilling fluids15 Sep 2026US 12,736,516 B2Halliburton Energy Services.Inc.
- Sampling through perforation guns with flushing28 Jul 2026US 12,692,786 B2Schlumberger Technology Corporation
- Diagnostic system directly connected to a subterranean formation for carbon dioixde monitoring30 Jun 2026US 12,669,493 B2Patina IP LLC
- Tracer autosampling method23 Jun 2026US 12,662,938 B2NCS Multistage Inc.
- Monitoring wellbore fluids using metal ions from tracers12 May 2026US 12,624,634 B2Halliburton Energy Services.Inc.
- Monitoring wellbore fluids using metal ions from tracers27 Aug 2026US 2026/0251059 A1Halliburton Energy Services.Inc.
- Continuous characterization and communication of chemical tracer9 Jul 2026US 2026/0193981 A1Patina IP LLC
- Systems and methods for detecting and characterizing contamination in gas sampling systems18 Jun 2026US 2026/0168893 A1Schlumberger Technology Corporation
- Systems and methods for gas chromatography and contamination detection18 Jun 2026US 2026/0168971 A1Schlumberger Technology Corporation
- Dynamically engineered sampling kits for liquid samples5 Feb 2026US 2026/0036048 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Method and apparatus for sampling fluids from a wellbore85US 6,435,279 B1Halliburton Energy Services.Inc. · 2002
- Process and apparatus for monitoring and controlling the flammability of gas from an in-situ combustion oil recovery project74US 4,683,947 AAir Products and Chemicals, Inc. · 1987
- Apparatus and method to obtain representative samples of oil well production35US 6,212,948 B12001
- Method for sampling a fluid from a well34US 4,454,772 ATexaco Inc. · 1984
- Three-phase well test apparatus using pumped recirculation to maintain homogenous flow34US 5,211,842 AConoco Inc. · 1993