E21B 47/085
Using radiant means
Official title: using radiant means, e.g. acoustic, radioactive or electromagnetic
E21B47/085 (Using radiant means) appears on 321 US grants and 299 published applications in this corpus.
Search patents in E21B- Granted patents
- 321
- Published applications
- 299
- Assignees
- 113
- Inventors
- 606
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 8 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 1 |
| 2002 | 4 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 1 |
| 2005 | 4 | 4 |
| 2006 | 3 | 8 |
| 2007 | 2 | 2 |
| 2008 | 4 | 2 |
| 2009 | 4 | 4 |
| 2010 | 2 | 6 |
| 2011 | 3 | 4 |
| 2012 | 3 | 4 |
| 2013 | 4 | 10 |
| 2014 | 4 | 9 |
| 2015 | 8 | 15 |
| 2016 | 7 | 15 |
| 2017 | 9 | 20 |
| 2018 | 19 | 26 |
| 2019 | 24 | 32 |
| 2020 | 26 | 21 |
| 2021 | 23 | 26 |
| 2022 | 15 | 19 |
| 2023 | 18 | 18 |
| 2024 | 26 | 16 |
| 2025 | 10 | 13 |
| 2026 | 10 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Borehole correction for resistivity LWD tools with ultrasonic log while drilling caliper25 Aug 2026US 12,716,344 B2Halliburton Energy Services.Inc.
- Multi-casing evaluation using multi-frequency, non-collocated, induction measurements11 Aug 2026US 12,704,060 B2Schlumberger Technology Corporation
- Spatial characterization of dysfunction in downhole systems4 Aug 2026US 12,698,706 B2Schlumberger Technology Corporation
- Processing and joint interpretation using multiple borehole acoustic waves for through tubing cement evaluation14 Jul 2026US 12,680,442 B2Halliburton Energy Services.Inc.
- Downhole tubular inspection using partial-saturation eddy currents21 Apr 2026US 12,607,113 B2Halliburton Energy Services.Inc.
- Processing and joint interpretation using multiple borehole acoustic waves for through tubing cement evaluation8 Oct 2026US 2026/0309020 A1Halliburton Energy Services.Inc.
- Well logging apparatus with buoyancy adjustment27 Aug 2026US 2026/0251058 A1Schlumberger Technology Corporation
- Downhole tubular inspection using partial-saturation eddy currents30 Jul 2026US 2026/0218601 A1Halliburton Energy Services.Inc.
- Test Device and Test Method for While-Drilling Casing Collapse and Cementing Quality Evaluation23 Jul 2026US 2026/0210231 A1China Oilfield Services Limited
- Systems and methods for multiple mechanical caliper measurements23 Jul 2026US 2026/0210234 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Drilling systems with sensors for determining properties of drilling fluid downhole402US 6,176,323 B1Baker Hughes Incorporated · 2001
- Method and apparatus for solution mining148US 5,246,273 A1993
- Method and apparatus for inspecting well bore casing129US 5,717,169 ASchlumberger Technology Corporation · 1998
- Measurement-while-drilling devices with pad mounted sensors127US 6,173,793 B1Baker Hughes Incorporated · 2001
- Method and apparatus for acoustically investigating a casing and cement bond in a borehole119US 4,255,798 ASchlumberger Technology Corporation · 1981