E21B 47/08
Measuring diameters or related dimensions at the borehole
E21B47/08 (Measuring diameters or related dimensions at the borehole) appears on 585 US grants and 564 published applications in this corpus.
Search patents in E21B- Granted patents
- 585
- Published applications
- 564
- Assignees
- 179
- Inventors
- 1,180
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 10 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 11 | 0 |
| 1986 | 7 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 10 | 0 |
| 1991 | 4 | 0 |
| 1992 | 7 | 0 |
| 1993 | 8 | 0 |
| 1994 | 5 | 0 |
| 1995 | 9 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 6 | 1 |
| 2002 | 9 | 3 |
| 2003 | 3 | 3 |
| 2004 | 1 | 3 |
| 2005 | 7 | 5 |
| 2006 | 4 | 11 |
| 2007 | 3 | 5 |
| 2008 | 6 | 9 |
| 2009 | 5 | 14 |
| 2010 | 6 | 15 |
| 2011 | 13 | 7 |
| 2012 | 7 | 14 |
| 2013 | 6 | 13 |
| 2014 | 10 | 18 |
| 2015 | 15 | 26 |
| 2016 | 16 | 27 |
| 2017 | 19 | 33 |
| 2018 | 29 | 39 |
| 2019 | 35 | 45 |
| 2020 | 39 | 38 |
| 2021 | 36 | 52 |
| 2022 | 33 | 45 |
| 2023 | 48 | 42 |
| 2024 | 46 | 31 |
| 2025 | 26 | 33 |
| 2026 | 22 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for untethered multifinger imaging of a wellbore inner wall29 Sep 2026US 12,747,662 B2Saudi Arabian Oil Company
- 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
- Methods and systems for greenhouse gas capture and sequestration28 Jul 2026US 12,692,773 B2Carbon Geocycle, Inc.
- Processing and joint interpretation using multiple borehole acoustic waves for through tubing cement evaluation8 Oct 2026US 2026/0309020 A1Halliburton Energy Services.Inc.
- Systems and methods for multi-finger caliper tool1 Oct 2026US 2026/0298079 A1Schlumberger Technology Corporation
- Multimodal processing of pulsed eddy current response signal for well integrity evaluation24 Sep 2026US 2026/0287553 A1Schlumberger Technology Corporation
- Devices, systems, and methods for validating drilling equipment17 Sep 2026US 2026/0278500 A1Schlumberger Technology Corporation
- Flexible arm caliper tool for downhole measurements27 Aug 2026US 2026/0251057 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
- 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
- Rotary steerable well drilling system utilizing hydraulic servo-loop176US 6,109,372 ASchlumberger Technology Corporation · 2000
- Downhole tools using artificial intelligence based control170US 6,026,911 AIntelligent Inspection Corporation · 2000