E21B 47/00
Survey of boreholes or wells
Official title: Survey of boreholes or wells (monitoring pressure or flow of drilling fluid E21B21/08)
E21B47/00 (Survey of boreholes or wells) appears on 17,507 US grants and 17,775 published applications in this corpus.
Search patents in E21B- Granted patents
- 17,507
- Published applications
- 17,775
- Assignees
- 3,029
- Inventors
- 22,767
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 91 | 0 |
| 1977 | 87 | 0 |
| 1978 | 75 | 0 |
| 1979 | 62 | 0 |
| 1980 | 68 | 0 |
| 1981 | 90 | 0 |
| 1982 | 72 | 0 |
| 1983 | 84 | 0 |
| 1984 | 106 | 0 |
| 1985 | 121 | 0 |
| 1986 | 120 | 0 |
| 1987 | 130 | 0 |
| 1988 | 128 | 0 |
| 1989 | 174 | 0 |
| 1990 | 144 | 0 |
| 1991 | 114 | 0 |
| 1992 | 140 | 0 |
| 1993 | 122 | 0 |
| 1994 | 129 | 0 |
| 1995 | 98 | 0 |
| 1996 | 117 | 0 |
| 1997 | 81 | 0 |
| 1998 | 121 | 0 |
| 1999 | 142 | 0 |
| 2000 | 143 | 0 |
| 2001 | 168 | 49 |
| 2002 | 197 | 204 |
| 2003 | 195 | 246 |
| 2004 | 184 | 299 |
| 2005 | 199 | 301 |
| 2006 | 240 | 287 |
| 2007 | 242 | 289 |
| 2008 | 200 | 326 |
| 2009 | 208 | 402 |
| 2010 | 289 | 423 |
| 2011 | 265 | 452 |
| 2012 | 321 | 508 |
| 2013 | 334 | 645 |
| 2014 | 428 | 771 |
| 2015 | 493 | 1034 |
| 2016 | 657 | 1163 |
| 2017 | 864 | 1216 |
| 2018 | 946 | 1233 |
| 2019 | 1291 | 1198 |
| 2020 | 1183 | 1121 |
| 2021 | 1177 | 1292 |
| 2022 | 1094 | 1017 |
| 2023 | 1122 | 977 |
| 2024 | 976 | 939 |
| 2025 | 862 | 835 |
| 2026 | 613 | 548 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21B 47/12Means for transmitting measuring-signals or control signals from the well to the5,887
- E21B 47/06Measuring temperature or pressure3,427
- E21B 47/10Locating fluid leaks, intrusions or movements3,118
- E21B 47/02Determining slope or direction2,632
- E21B 47/01Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines2,224
- E21B 47/09Locating or determining the position of objects in boreholes or wells1,784
- E21B 47/04Measuring depth or liquid level878
- E21B 47/002Survey of boreholes or wells: by visual inspection737
All 16 subgroupsShow fewer
- E21B 47/008Monitoring of down-hole pump systems714
- E21B 47/005Monitoring or checking of cementation quality or level637
- E21B 47/007Measuring stresses in a pipe string or casing597
- E21B 47/08Measuring diameters or related dimensions at the borehole585
- E21B 47/26Storing data down-hole399
- E21B 47/006Detection of corrosion or deposition of substances271
- E21B 47/001Survey of boreholes or wells: for underwater installation255
- E21B 47/003Determining well or borehole volumes137
Recent patents
- Modified gas assisted plunger lift6 Oct 2026US 12,753,684 B2Silverwell Technology Limited
- Integrating ethernet technology within drilling systems6 Oct 2026US 12,753,688 B2Schlumberger Technology Corporation
- Horizontal directional drilling system and method6 Oct 2026US 12,753,690 B2Vermeer Manufacturing Company
- Systems and methods for determining a wellbore-casing volume6 Oct 2026US 12,753,691 B2Saudi Arabian Oil Company
- Subsurface detection system and method6 Oct 2026US 12,753,692 B2Schlumberger Technology Corporation
- Processing and joint interpretation using multiple borehole acoustic waves for through tubing cement evaluation8 Oct 2026US 2026/0309020 A1Halliburton Energy Services.Inc.
- System and method for predicting corrosion rate in boreholes8 Oct 2026US 2026/0309021 A1Schlumberger Technology Corporation
- Systems and methods for deploying and retrieving magnetically coupled temporary wireline fiber for broadside wave detection8 Oct 2026US 2026/0309022 A1
- Temperature management of downhole tools8 Oct 2026US 2026/0309023 A1Eavor Technologies Inc.
- Conglomerate reservoir segmentation and clustering method and apparatus, storage medium, and processor8 Oct 2026US 2026/0309024 A1PetroChina Company Limited
Most cited
By later US patents
- Controlling hydrocarbon production609US 10,677,035 B2Saudi Arabian Oil Company · 2020
- Method and apparatus employing received independent magnetic field components of a transmitted alternating magnetic field for determining location494US 4,710,708 ADevelco, Inc. · 1987
- Method and apparatus for testing, completion and/or maintaining wellbores using a sensor device420US 5,829,520 ABaker Hughes Incorporated · 1998
- Drilling systems with sensors for determining properties of drilling fluid downhole402US 6,176,323 B1Baker Hughes Incorporated · 2001
- Downhole combination tool358US 5,064,006 AMagrange, Inc · 1991