E21B 47/026
Of penetrated ground layers
Official title: of penetrated ground layers
E21B47/026 (Of penetrated ground layers) appears on 185 US grants and 182 published applications in this corpus.
Search patents in E21B- Granted patents
- 185
- Published applications
- 182
- Assignees
- 79
- Inventors
- 364
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 2 | 7 |
| 2005 | 1 | 2 |
| 2006 | 5 | 6 |
| 2007 | 4 | 3 |
| 2008 | 1 | 10 |
| 2009 | 2 | 3 |
| 2010 | 5 | 3 |
| 2011 | 1 | 4 |
| 2012 | 5 | 6 |
| 2013 | 10 | 9 |
| 2014 | 4 | 9 |
| 2015 | 6 | 15 |
| 2016 | 4 | 11 |
| 2017 | 12 | 10 |
| 2018 | 8 | 8 |
| 2019 | 11 | 6 |
| 2020 | 6 | 13 |
| 2021 | 10 | 19 |
| 2022 | 14 | 6 |
| 2023 | 6 | 6 |
| 2024 | 5 | 3 |
| 2025 | 8 | 12 |
| 2026 | 6 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Logging tool inversion integration29 Sep 2026US 12,747,661 B2Schlumberger Technology Corporation
- Visualization of directional influence of wells on correlation8 Sep 2026US 12,729,621 B2Chevron U.S.A.Inc.
- Anticorrelation in propagation resistivity logs for geosteering28 Jul 2026US 12,692,778 B2Schlumberger Technology Corporation
- Drilling apparatus and method for the determination of formation location21 Apr 2026US 12,607,114 B2Antech Limited
- System and method for determining the location of a bottom hole assembly7 Apr 2026US 12,595,730 B2Motive Drilling Technologies, Inc.
- Downhole anisotropy inversion for look ahead detection during drilling30 Jul 2026US 2026/0219414 A1Halliburton Energy Services.Inc.
- Data capture device, system & method23 Jul 2026US 2026/0210238 A1
- Method and system for determining core orientation16 Jul 2026US 2026/0201793 A1
- System and method for drilling event detection16 Jul 2026US 2026/0201795 A1Motive Drilling Technologies, Inc.
- Apparatus and method for constructing a modular logging-while-drilling tool16 Jul 2026US 2026/0201797 A1Well Resolutions Technology
Most cited
By later US patents
- Directional resistivity measurements for azimuthal proximity detection of bed boundaries164US 6,181,138 B2Halliburton Energy Services.Inc. · 2001
- Dipmeter apparatus and method using transducer array having longitudinally spaced transducers106US 5,200,705 ASchlumberger Technology Corporation · 1993
- Down hole video tool apparatus and method for visual well bore recording64US 4,855,820 A1989
- Apparatus and method for wellbore resistivity imaging using capacitive coupling59US 6,714,014 B2Baker Hughes Incorporated · 2004
- Method and apparatus for exploration of geological formation tilt in boreholes54US 4,251,773 ASchlumberger Technology Corporation · 1981