E21B 47/117
Detecting leaks
Official title: Detecting leaks, e.g. from tubing, by pressure testing
E21B47/117 (Detecting leaks) appears on 472 US grants and 443 published applications in this corpus.
Search patents in E21B- Granted patents
- 472
- Published applications
- 443
- Assignees
- 221
- Inventors
- 1,013
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 9 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 2 |
| 2003 | 1 | 6 |
| 2004 | 3 | 1 |
| 2005 | 2 | 5 |
| 2006 | 3 | 0 |
| 2007 | 4 | 5 |
| 2008 | 1 | 3 |
| 2009 | 4 | 8 |
| 2010 | 8 | 9 |
| 2011 | 9 | 8 |
| 2012 | 6 | 6 |
| 2013 | 5 | 16 |
| 2014 | 9 | 18 |
| 2015 | 12 | 17 |
| 2016 | 10 | 16 |
| 2017 | 14 | 19 |
| 2018 | 15 | 28 |
| 2019 | 27 | 51 |
| 2020 | 32 | 34 |
| 2021 | 40 | 38 |
| 2022 | 31 | 34 |
| 2023 | 44 | 31 |
| 2024 | 40 | 29 |
| 2025 | 42 | 42 |
| 2026 | 22 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Well integrity system and method25 Aug 2026US 12,716,330 B2Ads Services, LLC
- Methods and devices for retaining conveyed heat up a wellbore18 Aug 2026US 12,709,962 B2Gradient Geothermal Inc.
- Shoe track assembly system and method of use28 Jul 2026US 12,692,783 B1Citadel Casing Solutions LLC
- Wellbore seal28 Jul 2026US 12,692,784 B2Schlumberger Technology Corporation
- Detecting wellbore leaks14 Jul 2026US 12,680,446 B1Saudi Arabian Oil Company
- Downhole flow monitoring and evaluation using distributed acoustic sensing and acoustic noise logging1 Oct 2026US 2026/0298078 A1Halliburton Energy Services.Inc.
- Pressure response test to detect leakage of rotating control device24 Sep 2026US 2026/0286841 A1Schlumberger Technology Corporation
- Procedure to characterize sound sources with experiments removing the influence from an experimental acoustic apparatus17 Sep 2026US 2026/0276854 A1Halliburton Energy Services.Inc.
- Tieback liner section23 Jul 2026US 2026/0210214 A1Abu Dhabi Company for Onshore Petroleum Operations Limited
- Wellbore seal23 Jul 2026US 2026/0210235 A1Schlumberger Technology Corporation
Most cited
By later US patents
- System containing expendible isolation valve with frangible sealing member, seat arrangement and method for use134US 5,188,182 AOtis Engineering Corporation · 1993
- Tree test plug108US 5,775,422 AFMC Corporation · 1998
- Chemical actuation of downhole tools101US 6,349,766 B1Baker Hughes Incorporated · 2002
- Subsea wellhead apparatus87US 5,143,158 ADril-Quip, Inc. · 1992
- Apparatus and method for completing and recompleting wells for production82US 5,615,739 A1997