E21B 49/088
Combined with sampling
Official title: {combined with sampling}
E21B49/088 (Combined with sampling) appears on 359 US grants and 369 published applications in this corpus.
Search patents in E21B- Granted patents
- 359
- Published applications
- 369
- Assignees
- 88
- Inventors
- 763
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 5 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 1 |
| 2002 | 11 | 6 |
| 2003 | 5 | 3 |
| 2004 | 1 | 8 |
| 2005 | 1 | 4 |
| 2006 | 4 | 1 |
| 2007 | 5 | 3 |
| 2008 | 3 | 6 |
| 2009 | 2 | 0 |
| 2010 | 0 | 3 |
| 2011 | 1 | 4 |
| 2012 | 1 | 8 |
| 2013 | 3 | 11 |
| 2014 | 12 | 20 |
| 2015 | 6 | 29 |
| 2016 | 15 | 22 |
| 2017 | 19 | 18 |
| 2018 | 9 | 30 |
| 2019 | 32 | 29 |
| 2020 | 31 | 22 |
| 2021 | 22 | 31 |
| 2022 | 35 | 24 |
| 2023 | 34 | 28 |
| 2024 | 23 | 18 |
| 2025 | 21 | 21 |
| 2026 | 20 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Validation for reservoir flow during formation testing22 Sep 2026US 12,742,387 B2Halliburton Energy Services.Inc.
- Determination of downhole formation fluid contamination and certain component concentrations15 Sep 2026US 12,735,984 B2Halliburton Energy Services.Inc.
- Sulfur and amorphous dithiazine measurement30 Jun 2026US 12,669,494 B2ConocoPhillips Company
- Tracer autosampling method23 Jun 2026US 12,662,938 B2NCS Multistage Inc.
- Hydrogen production, storage and recovery16 Jun 2026US 12,655,725 B2TerraH2 LLC
- Real time downhole api determination24 Sep 2026US 2026/0286843 A1Schlumberger Technology Corporation
- Formation fluid sampling using probe with inflatable pad27 Aug 2026US 2026/0251062 A1Halliburton Energy Services.Inc.
- Estimating a cleanup curve for a downhole fluid sampling operation27 Aug 2026US 2026/0251063 A1Schlumberger Technology Corporation
- Fluid compressibility factor and method of determination30 Jul 2026US 2026/0218610 A1Schlumberger Technology Corporation
- Tubing or casing conveyed fluid sampling system23 Jul 2026US 2026/0210244 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Down hole tool for determination of formation properties330US 4,860,581 ASchlumberger Technology Corporation · 1989
- Down hole method for determination of formation properties276US 4,936,139 ASchlumberger Technology Corporation · 1990
- Apparatus and method for analyzing the composition of formation fluids242US 4,994,671 ASchlumberger Technology Corporation · 1991
- Formation isolation and testing apparatus and method172US 5,803,186 ABaker Hughes Incorporated · 1998
- Early evaluation system with pump and method of servicing a well128US 5,799,733 AHalliburton Energy Services.Inc. · 1998