E21B 29/10
Reconditioning of well casings
Official title: Reconditioning of well casings, e.g. straightening
E21B29/10 (Reconditioning of well casings) appears on 359 US grants and 334 published applications in this corpus.
Search patents in E21B- Granted patents
- 359
- Published applications
- 334
- Assignees
- 119
- Inventors
- 587
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 6 |
| 2002 | 9 | 21 |
| 2003 | 15 | 21 |
| 2004 | 22 | 25 |
| 2005 | 5 | 28 |
| 2006 | 29 | 13 |
| 2007 | 27 | 15 |
| 2008 | 12 | 14 |
| 2009 | 10 | 12 |
| 2010 | 5 | 10 |
| 2011 | 8 | 7 |
| 2012 | 13 | 13 |
| 2013 | 3 | 11 |
| 2014 | 7 | 8 |
| 2015 | 11 | 8 |
| 2016 | 9 | 9 |
| 2017 | 5 | 10 |
| 2018 | 6 | 9 |
| 2019 | 7 | 15 |
| 2020 | 17 | 14 |
| 2021 | 15 | 18 |
| 2022 | 13 | 17 |
| 2023 | 15 | 11 |
| 2024 | 9 | 7 |
| 2025 | 15 | 8 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pinhole repair method using epoxy and expandable mesh16 Jun 2026US 12,655,756 B2Saudi Arabian Oil Company
- Curing casing leak tool21 Apr 2026US 12,607,091 B2Saudi Arabian Oil Company
- Additive manufacture system3 Mar 2026US 12,565,002 B2Kongsberg Ferrotech AS
- Method of creating a plurality of longitudinally separated circumferential dents in a wellbore tubular30 Dec 2025US 12,509,953 B2Shell USA, Inc.
- Laser milling system for concentric casing string cement repair23 Dec 2025US 12,503,926 B2Saudi Arabian Oil Company
- Downhole patch13 Aug 2026US 2026/0235011 A1Welltec A/S
- Additive manufacture system9 Jul 2026US 2026/0192520 A1Kongsberg Ferrotech AS
- Expandable casing patch system and method for installing such casing patch30 Apr 2026US 2026/0117616 A1Uniarmour LLC
- Downhole packer assembly12 Mar 2026US 2026/0071512 A1Welltec A/S
- Non-metallic expandable tubular4 Dec 2025US 2025/0369317 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Method of creating a wellbore in an underground formation356US 5,348,095 AShell Oil Company · 1994
- Procedures and equipment for profiling and jointing of pipes319US 6,457,532 B1Weatherford/Lamb, Inc. · 2002
- Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means292US 5,318,122 ABaker Hughes Incorporated · 1994
- Downhole pipe expansion apparatus and method258US 6,021,850 ABaker Hughes Incorporated · 2000
- Method and apparatus for downhole sealing252US 6,425,444 B1Weatherford/Lamb, Inc. · 2002