E21B 47/16
Through the drill string or casing
Official title: through the drill string or casing {, e.g. by torsional acoustic waves}
E21B47/16 (Through the drill string or casing) appears on 417 US grants and 391 published applications in this corpus.
Search patents in E21B- Granted patents
- 417
- Published applications
- 391
- Assignees
- 113
- Inventors
- 708
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 7 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 10 | 0 |
| 1993 | 2 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 8 | 1 |
| 2002 | 8 | 6 |
| 2003 | 4 | 12 |
| 2004 | 5 | 10 |
| 2005 | 12 | 6 |
| 2006 | 5 | 10 |
| 2007 | 8 | 4 |
| 2008 | 5 | 11 |
| 2009 | 4 | 7 |
| 2010 | 5 | 7 |
| 2011 | 7 | 12 |
| 2012 | 6 | 11 |
| 2013 | 8 | 8 |
| 2014 | 8 | 21 |
| 2015 | 13 | 39 |
| 2016 | 20 | 29 |
| 2017 | 32 | 27 |
| 2018 | 23 | 27 |
| 2019 | 35 | 41 |
| 2020 | 27 | 18 |
| 2021 | 23 | 21 |
| 2022 | 14 | 16 |
| 2023 | 21 | 12 |
| 2024 | 18 | 10 |
| 2025 | 11 | 19 |
| 2026 | 11 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High voltage pulse delivery over long cables in pulsed power systems1 Sep 2026US 12,726,132 B2Halliburton Energy Services.Inc.
- Computing A0 mode attenuation for cement evaluation in cased wells11 Aug 2026US 12,704,063 B2Halliburton Energy Services.Inc.
- Spiral waveform analysis for behind pipe cement evaluation, well abandonment operations and complex annular environments14 Jul 2026US 12,680,441 B2Halliburton Energy Services.Inc.
- In-slips acoustic reception7 Jul 2026US 12,674,389 B2Baker Hughes Oilfield Operations LLC
- Acoustic receiver7 Jul 2026US 12,674,390 B2Raptor Data Limited
- In-slips acoustic communications17 Sep 2026US 2026/0275861 A1Baker Hughes Oilfield Operations LLC
- Downhole wireless acoustic powering and communications23 Jul 2026US 2026/0210240 A1National Technology & Engineering Solutions of Sandia, LLC
- Multi-channel acoustic receiver for acoustic communication network23 Jul 2026US 2026/0210241 A1Schlumberger Technology Corporation
- Systems and Methods for Data Acquisition From Outside a Well Casing23 Jul 2026US 2026/0210242 A1National Technology & Engineering Solutions of Sandia, LLC
- Subsea tool assembly and method of operating a subsea tool19 Mar 2026US 2026/0078651 A1Baker Hughes Energy Technology UK Limited
Most cited
By later US patents
- Acoustic data link and formation property sensor for downhole MWD system315US 5,924,499 AHalliburton Energy Services.Inc. · 1999
- Downhole production well control system and method208US 5,732,776 ABaker Hughes Incorporated · 1998
- Method for directionally drilling a borehole192US 5,467,832 ASchlumberger Technology Corporation · 1995
- Method and apparatus for the remote control and monitoring of production wells168US 5,706,896 ABaker Hughes Incorporated · 1998
- Production well telemetry system and method158US 5,941,307 ABaker Hughes Incorporated · 1999