E21B 47/09
Locating or determining the position of objects in boreholes or wells
Official title: Locating or determining the position of objects in boreholes or wells {, e.g. the position of an extending arm}; Identifying the free or blocked portions of pipes
E21B47/09 (Locating or determining the position of objects in boreholes or wells) appears on 1,784 US grants and 1,838 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,784
- Published applications
- 1,838
- Assignees
- 502
- Inventors
- 3,110
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 9 | 0 |
| 1978 | 9 | 0 |
| 1979 | 0 | 0 |
| 1980 | 7 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 9 | 0 |
| 1985 | 6 | 0 |
| 1986 | 10 | 0 |
| 1987 | 12 | 0 |
| 1988 | 7 | 0 |
| 1989 | 9 | 0 |
| 1990 | 12 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 6 | 0 |
| 1994 | 7 | 0 |
| 1995 | 10 | 0 |
| 1996 | 11 | 0 |
| 1997 | 3 | 0 |
| 1998 | 12 | 0 |
| 1999 | 15 | 0 |
| 2000 | 12 | 0 |
| 2001 | 20 | 5 |
| 2002 | 24 | 34 |
| 2003 | 20 | 26 |
| 2004 | 26 | 30 |
| 2005 | 12 | 20 |
| 2006 | 24 | 27 |
| 2007 | 23 | 11 |
| 2008 | 21 | 39 |
| 2009 | 12 | 34 |
| 2010 | 29 | 31 |
| 2011 | 21 | 40 |
| 2012 | 34 | 41 |
| 2013 | 37 | 66 |
| 2014 | 42 | 80 |
| 2015 | 59 | 114 |
| 2016 | 62 | 138 |
| 2017 | 101 | 131 |
| 2018 | 111 | 152 |
| 2019 | 138 | 133 |
| 2020 | 127 | 132 |
| 2021 | 141 | 136 |
| 2022 | 131 | 102 |
| 2023 | 126 | 102 |
| 2024 | 107 | 87 |
| 2025 | 88 | 73 |
| 2026 | 51 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Devices, systems, and methods for identifying a radial position of an expandable tool29 Sep 2026US 12,747,663 B1Schlumberger Technology Corporation
- Underground directional drilling apparatus22 Sep 2026US 12,742,358 B1Melfred Borzall, Inc.
- Calculating pull for a stuck drill string15 Sep 2026US 12,735,953 B2Landmark Graphics Corporation
- Systems and methods for estimating depth of wellbore survey measurements15 Sep 2026US 12,735,980 B1Schlumberger Technology Corporation
- Method and tool for cementing wellbore8 Sep 2026US 12,729,599 B2
- Conglomerate reservoir segmentation and clustering method and apparatus, storage medium, and processor8 Oct 2026US 2026/0309024 A1PetroChina Company Limited
- Fretting-wear resistant beacon lid1 Oct 2026US 2026/0298076 A1The Charles Machine Works, Inc.
- Electrically conductive proppant and methods for detecting, locating and characterizing the electrically conductive proppant24 Sep 2026US 2026/0286214 A1Carbo Ceramics Inc.
- Underground directional drilling apparatus24 Sep 2026US 2026/0286786 A1Melfred Borzall, Inc.
- Systems and methods for differentiating non-radioactive tracers downhole24 Sep 2026US 2026/0286839 A1Carbo Ceramics Inc.
Most cited
By later US patents
- Downhole combination tool358US 5,064,006 AMagrange, Inc · 1991
- Use of micro-electro-mechanical systems (MEMS) in well treatments247US 8,316,936 B2Halliburton Energy Services.Inc. · 2012
- Three magnet casing collar locator243US 4,808,925 AHalliburton Company · 1989
- Tubular patch240US 5,785,120 AWeatherford/Lamb, Inc. · 1998
- Systems and methods for exchanging fracturing components of a hydraulic fracturing unit180US 10,954,770 B1BJ Energy Solutions, LLC · 2021