E21B 47/002
Survey of boreholes or wells: by visual inspection
Official title: by visual inspection
E21B47/002 (Survey of boreholes or wells: by visual inspection) appears on 737 US grants and 851 published applications in this corpus.
Search patents in E21B- Granted patents
- 737
- Published applications
- 851
- Assignees
- 254
- Inventors
- 1,752
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 9 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 7 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 1 |
| 2003 | 3 | 3 |
| 2004 | 2 | 9 |
| 2005 | 1 | 8 |
| 2006 | 7 | 8 |
| 2007 | 12 | 10 |
| 2008 | 2 | 4 |
| 2009 | 6 | 9 |
| 2010 | 8 | 15 |
| 2011 | 4 | 5 |
| 2012 | 12 | 19 |
| 2013 | 3 | 12 |
| 2014 | 13 | 25 |
| 2015 | 10 | 39 |
| 2016 | 17 | 34 |
| 2017 | 33 | 60 |
| 2018 | 37 | 48 |
| 2019 | 57 | 60 |
| 2020 | 43 | 51 |
| 2021 | 48 | 105 |
| 2022 | 79 | 86 |
| 2023 | 78 | 70 |
| 2024 | 71 | 61 |
| 2025 | 55 | 50 |
| 2026 | 42 | 59 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Horizontal directional drilling system and method6 Oct 2026US 12,753,690 B2Vermeer Manufacturing Company
- Computer script for processing images and use thereof in a method for facies image determination6 Oct 2026US 12,755,356 B2Petroleo Brasileiro S.A. - Petrobras
- System and method for untethered multifinger imaging of a wellbore inner wall29 Sep 2026US 12,747,662 B2Saudi Arabian Oil Company
- Learning hydrocarbon distribution from seismic image29 Sep 2026US 12,748,229 B2Landmark Graphics Corporation
- Drill head for use with microtunneling apparatus15 Sep 2026US 12,735,946 B2OptionX Holdings Pty Ltd
- Calibration methods for oil based mud imager tools17 Sep 2026US 2026/0275856 A1Halliburton Energy Services.Inc.
- Systems and methods for automatically identifying analog materials based on estimated petrophysical properties of a selected sample material17 Sep 2026US 2026/0276618 A1BP Corporation North America Inc.
- Video camera-based noise and signal separation for mud pulse telemetry10 Sep 2026US 2026/0266172 A1Halliburton Energy Services.Inc.
- Systems and methods for generating synthetic fracture images of subsurface layers for drilling wells6 Aug 2026US 2026/0226822 A1Saudi Arabian Oil Company
- Downhole tubular inspection using partial-saturation eddy currents30 Jul 2026US 2026/0218601 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Drilling systems with sensors for determining properties of drilling fluid downhole402US 6,176,323 B1Baker Hughes Incorporated · 2001
- Logging while drilling borehole imaging and dipmeter device292US 5,899,958 AHalliburton Energy Services.Inc. · 1999
- Downhole tools using artificial intelligence based control225US 5,947,213 AIntelligent Inspection Corporation · 1999
- Autonomous downhole oilfield tool191US 6,378,627 B1Intelligent Inspection Corporation · 2002
- Downhole tools using artificial intelligence based control170US 6,026,911 AIntelligent Inspection Corporation · 2000