E21B 47/135
Using light waves
Official title: using light waves, e.g. infrared or ultraviolet waves
E21B47/135 (Using light waves) appears on 897 US grants and 1,076 published applications in this corpus.
Search patents in E21B- Granted patents
- 897
- Published applications
- 1,076
- Assignees
- 204
- Inventors
- 1,408
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 2 |
| 2002 | 5 | 11 |
| 2003 | 9 | 11 |
| 2004 | 8 | 24 |
| 2005 | 12 | 19 |
| 2006 | 14 | 17 |
| 2007 | 17 | 14 |
| 2008 | 11 | 23 |
| 2009 | 14 | 23 |
| 2010 | 20 | 25 |
| 2011 | 17 | 29 |
| 2012 | 16 | 30 |
| 2013 | 16 | 34 |
| 2014 | 21 | 58 |
| 2015 | 34 | 62 |
| 2016 | 42 | 87 |
| 2017 | 58 | 92 |
| 2018 | 55 | 91 |
| 2019 | 86 | 70 |
| 2020 | 77 | 58 |
| 2021 | 82 | 83 |
| 2022 | 49 | 55 |
| 2023 | 75 | 47 |
| 2024 | 49 | 44 |
| 2025 | 35 | 38 |
| 2026 | 31 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Subsurface detection system and method6 Oct 2026US 12,753,692 B2Schlumberger Technology Corporation
- Apparatus and methods for monitoring optical fiber system integrity15 Sep 2026US 12,736,438 B2OneSubsea IP UK Limited
- Monitoring and perforating system and method combining plug and perforation operation with distributed acoustic sensing1 Sep 2026US 12,723,497 B2Borehole Seismic, LLC.
- Real-time monitoring of an electronic assembly using an optical waveguide1 Sep 2026US 12,723,510 B1Schlumberger Technology Corporation
- Downhole fracturing zone data logger and downhole fracturing zone data acquisition system4 Aug 2026US 12,698,705 B2Zhejiang Tensing Science and Technology Co., Ltd.
- Optical cable straightening structure for logging while drilling, and drilling device1 Oct 2026US 2026/0298033 A1Wuhan University of Technology
- Downhole flow monitoring and evaluation using distributed acoustic sensing and acoustic noise logging1 Oct 2026US 2026/0298078 A1Halliburton Energy Services.Inc.
- Contrast component coating for sensor analysis24 Sep 2026US 2026/0286842 A1Halliburton Energy Services.Inc.
- Wetmate connection system and method17 Sep 2026US 2026/0275814 A1Schlumberger Technology Corporation
- Methods for real-time optimization of coiled tubing cleanout operations using downhole pressure sensors17 Sep 2026US 2026/0275821 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Method and system for monitoring smart structures utilizing distributed optical sensors332US 6,913,079 B22005
- Monitoring of downhole parameters and tools utilizing fiber optics244US 6,281,489 B1Baker Hughes Incorporated · 2001
- Monitoring of downhole parameters and tools utilizing fiber optics241US 6,588,266 B2Baker Hughes Incorporated · 2003
- Stationary system for the active and/or passive monitoring of an underground deposit237US 5,363,094 AInstitut Francais du Petrole · 1994
- Monitoring of downhole parameters and tools utilizing fiber optics159US 6,268,911 B1Baker Hughes Incorporated · 2001