E21B 21/067
Separating gases from drilling fluids
Official title: {Separating gases from drilling fluids}
E21B21/067 (Separating gases from drilling fluids) appears on 235 US grants and 222 published applications in this corpus.
Search patents in E21B- Granted patents
- 235
- Published applications
- 222
- Assignees
- 105
- Inventors
- 370
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 9 | 0 |
| 1983 | 6 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 2 | 1 |
| 2004 | 1 | 3 |
| 2005 | 1 | 3 |
| 2006 | 2 | 4 |
| 2007 | 2 | 1 |
| 2008 | 2 | 3 |
| 2009 | 1 | 3 |
| 2010 | 3 | 1 |
| 2011 | 1 | 7 |
| 2012 | 1 | 5 |
| 2013 | 4 | 5 |
| 2014 | 7 | 13 |
| 2015 | 10 | 16 |
| 2016 | 10 | 20 |
| 2017 | 16 | 23 |
| 2018 | 12 | 23 |
| 2019 | 17 | 19 |
| 2020 | 26 | 19 |
| 2021 | 16 | 10 |
| 2022 | 13 | 9 |
| 2023 | 9 | 9 |
| 2024 | 11 | 8 |
| 2025 | 9 | 10 |
| 2026 | 7 | 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.
- Refrigeration-integrated hydrocarbon collection system and method of operation25 Aug 2026US 12,716,649 B2Oxy Low Carbon Ventures, LLC
- Deep transient testing (DTT) downhole and surface gas rate integration workflow14 Jul 2026US 12,681,001 B2Schlumberger Technology Corporation
- Suction device for drilling mud2 Jun 2026US 12,644,349 B2Geolog S.r.l.
- Separator system and method19 May 2026US 12,631,076 B2
- Systems and methods for detecting and characterizing contamination in gas sampling systems18 Jun 2026US 2026/0168893 A1Schlumberger Technology Corporation
- Drilling unit with selective carbon dioxide and hydrocarbon drilling fluid venting system21 May 2026US 2026/0139559 A1
- Prediction of surface gas concentrations in drilling fluid9 Apr 2026US 2026/0098472 A1Schlumberger Technology Corporation
- Surface transit time determination26 Mar 2026US 2026/0085587 A1Schlumberger Technology Corporation
- Debris removal from degasser probe19 Mar 2026US 2026/0078644 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Method and apparatus for the continuous analysis of drilling mud123US 4,635,735 ASchlumberger Technology Corporation · 1987
- Measurement system and method for quantitatively determining the concentrations of a plurality of gases in drilling mud66US 4,887,464 AAnadrill, Inc. · 1989
- Subsea gas separation system and method for offshore drilling66US 6,276,455 B1Shell Offshore Inc. · 2001
- Motorized gas trap52US 4,358,298 A1982
- Drilling mud degasser apparatus and method48US 3,973,930 A1976