E21B 33/13
Methods or devices for cementing, for plugging holes, crevices or the like
E21B33/13 (Methods or devices for cementing, for plugging holes, crevices or the like) appears on 5,076 US grants and 4,942 published applications in this corpus.
Search patents in E21B- Granted patents
- 5,076
- Published applications
- 4,942
- Assignees
- 1,066
- Inventors
- 6,965
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 18 | 0 |
| 1978 | 17 | 0 |
| 1979 | 19 | 0 |
| 1980 | 19 | 0 |
| 1981 | 18 | 0 |
| 1982 | 15 | 0 |
| 1983 | 30 | 0 |
| 1984 | 43 | 0 |
| 1985 | 24 | 0 |
| 1986 | 18 | 0 |
| 1987 | 39 | 0 |
| 1988 | 23 | 0 |
| 1989 | 40 | 0 |
| 1990 | 41 | 0 |
| 1991 | 32 | 0 |
| 1992 | 35 | 0 |
| 1993 | 40 | 0 |
| 1994 | 69 | 0 |
| 1995 | 50 | 0 |
| 1996 | 45 | 0 |
| 1997 | 28 | 0 |
| 1998 | 55 | 0 |
| 1999 | 39 | 0 |
| 2000 | 36 | 0 |
| 2001 | 36 | 12 |
| 2002 | 43 | 58 |
| 2003 | 59 | 61 |
| 2004 | 55 | 104 |
| 2005 | 46 | 82 |
| 2006 | 79 | 66 |
| 2007 | 75 | 64 |
| 2008 | 52 | 105 |
| 2009 | 66 | 85 |
| 2010 | 80 | 104 |
| 2011 | 51 | 134 |
| 2012 | 69 | 125 |
| 2013 | 84 | 186 |
| 2014 | 114 | 253 |
| 2015 | 159 | 242 |
| 2016 | 182 | 334 |
| 2017 | 224 | 392 |
| 2018 | 300 | 435 |
| 2019 | 425 | 376 |
| 2020 | 393 | 336 |
| 2021 | 380 | 351 |
| 2022 | 334 | 250 |
| 2023 | 285 | 247 |
| 2024 | 279 | 238 |
| 2025 | 247 | 176 |
| 2026 | 145 | 126 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods of treating unconsolidated sand formations using a red mud sealant composition6 Oct 2026US 12,753,339 B2Saudi Arabian Oil Company
- Systems and methods of deploying a wiper plug in a downhole tubular string6 Oct 2026US 12,753,670 B1Halliburton Energy Services.Inc.
- Method of sealing a well with multiple annuli22 Sep 2026US 12,742,364 B2Schlumberger Technology Corporation
- Behind casing wash and cement22 Sep 2026US 12,742,370 B2Hydra Systems AS
- Deflocculation additives for wellbore servicing fluid additives15 Sep 2026US 12,735,620 B2Halliburton Energy Services.Inc.
- Apparatus utilizing shape-memory and self-assembly to plug relatively wide remote fractures8 Oct 2026US 2026/0308440 A1The Penn State Research Foundation
- Formation Maintenance Fluids with Flowback Enhancers to Improve Wellbore Operations8 Oct 2026US 2026/0308442 A1Baker Hughes Oilfield Operations LLC
- Improvements in or Relating to Well Abandonment8 Oct 2026US 2026/0308995 A1
- Low profile stage collar and related methods for stage cementing operations8 Oct 2026US 2026/0309001 A1
- Plugging assemblies for plugging cased wellbores1 Oct 2026US 2026/0298044 A1G&H Diversified Manufacturing LP
Most cited
By later US patents
- Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means361US 5,388,648 ABaker Hughes Incorporated · 1995
- Compositions and methods for cementing using elastic particles353US 6,508,305 B1BJ Services Company · 2003
- Downhole surge pressure reduction system and method of use340US 5,960,881 AJerry P. Allamon · 1999
- Method for treating multiple wellbore intervals339US 6,543,538 B2ExxonMobil Upstream Research Company · 2003
- Method of creating a casing in a borehole325US 5,667,011 AShell Oil Company · 1997