E21B 47/022
Of the borehole
Official title: of the borehole, e.g. using geomagnetism
E21B47/022 (Of the borehole) appears on 1,566 US grants and 1,343 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,566
- Published applications
- 1,343
- Assignees
- 415
- Inventors
- 2,338
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 12 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 14 | 0 |
| 1981 | 11 | 0 |
| 1982 | 7 | 0 |
| 1983 | 16 | 0 |
| 1984 | 21 | 0 |
| 1985 | 10 | 0 |
| 1986 | 11 | 0 |
| 1987 | 20 | 0 |
| 1988 | 13 | 0 |
| 1989 | 23 | 0 |
| 1990 | 20 | 0 |
| 1991 | 13 | 0 |
| 1992 | 19 | 0 |
| 1993 | 18 | 0 |
| 1994 | 15 | 0 |
| 1995 | 16 | 0 |
| 1996 | 15 | 0 |
| 1997 | 14 | 0 |
| 1998 | 16 | 0 |
| 1999 | 22 | 0 |
| 2000 | 16 | 0 |
| 2001 | 19 | 6 |
| 2002 | 24 | 23 |
| 2003 | 27 | 38 |
| 2004 | 20 | 32 |
| 2005 | 29 | 36 |
| 2006 | 36 | 24 |
| 2007 | 19 | 27 |
| 2008 | 22 | 38 |
| 2009 | 24 | 56 |
| 2010 | 43 | 38 |
| 2011 | 31 | 38 |
| 2012 | 26 | 39 |
| 2013 | 31 | 45 |
| 2014 | 39 | 51 |
| 2015 | 42 | 67 |
| 2016 | 50 | 96 |
| 2017 | 47 | 77 |
| 2018 | 64 | 98 |
| 2019 | 118 | 65 |
| 2020 | 90 | 78 |
| 2021 | 74 | 86 |
| 2022 | 77 | 65 |
| 2023 | 73 | 48 |
| 2024 | 68 | 65 |
| 2025 | 66 | 61 |
| 2026 | 41 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Interference compensated cross-axial magnetometer measurements22 Sep 2026US 12,742,380 B2Schlumberger Technology Corporation
- Method and system for controlling a multi-stage wireline operation in a well15 Sep 2026US 12,735,948 B2
- Systems and methods for estimating depth of wellbore survey measurements15 Sep 2026US 12,735,980 B1Schlumberger Technology Corporation
- Wellbore surveying and ranging data integration1 Sep 2026US 12,723,504 B1Schlumberger Technology Corporation
- Borehole correction for resistivity LWD tools with ultrasonic log while drilling caliper25 Aug 2026US 12,716,344 B2Halliburton Energy Services.Inc.
- Fretting-wear resistant beacon lid1 Oct 2026US 2026/0298076 A1The Charles Machine Works, Inc.
- Automated control of trajectory of downhole drilling24 Sep 2026US 2026/0286829 A1Schlumberger Technology Corporation
- System and method for preventing collisions in wellbores10 Sep 2026US 2026/0266175 A1Schlumberger Technology Corporation
- Milling assembly for drilling a multilateral wellbore10 Sep 2026US 2026/0266176 A1Halliburton Energy Services.Inc.
- Method for predicting a reservoir's structure, petrophysical properties, and associated uncertainty in front of a drill bit10 Sep 2026US 2026/0266177 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Method and apparatus employing received independent magnetic field components of a transmitted alternating magnetic field for determining location494US 4,710,708 ADevelco, Inc. · 1987
- Downhole combination tool358US 5,064,006 AMagrange, Inc · 1991
- Method for drilling a borehole from one cased borehole to another cased borehole312US 5,541,517 AShell Oil Company · 1996
- Rotating magnet for distance and direction measurements from a first borehole to a second borehole292US 5,589,775 AVector Magnetics, Inc. · 1996
- Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto284US 5,812,068 ABaker Hughes Incorporated · 1998