E21B 33/138
Plastering the borehole wall
Official title: Plastering the borehole wall; Injecting into the formation
E21B33/138 (Plastering the borehole wall) appears on 1,237 US grants and 1,192 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,237
- Published applications
- 1,192
- Assignees
- 386
- Inventors
- 2,193
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 7 | 0 |
| 1978 | 10 | 0 |
| 1979 | 8 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 9 | 0 |
| 1984 | 11 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 7 | 0 |
| 1989 | 11 | 0 |
| 1990 | 11 | 0 |
| 1991 | 10 | 0 |
| 1992 | 9 | 0 |
| 1993 | 9 | 0 |
| 1994 | 11 | 0 |
| 1995 | 8 | 0 |
| 1996 | 11 | 0 |
| 1997 | 1 | 0 |
| 1998 | 8 | 0 |
| 1999 | 17 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 1 |
| 2002 | 9 | 12 |
| 2003 | 10 | 11 |
| 2004 | 10 | 16 |
| 2005 | 7 | 23 |
| 2006 | 17 | 11 |
| 2007 | 13 | 10 |
| 2008 | 9 | 22 |
| 2009 | 16 | 21 |
| 2010 | 19 | 17 |
| 2011 | 9 | 31 |
| 2012 | 11 | 18 |
| 2013 | 17 | 34 |
| 2014 | 24 | 49 |
| 2015 | 29 | 68 |
| 2016 | 24 | 80 |
| 2017 | 53 | 100 |
| 2018 | 98 | 87 |
| 2019 | 96 | 125 |
| 2020 | 97 | 105 |
| 2021 | 114 | 99 |
| 2022 | 99 | 51 |
| 2023 | 82 | 57 |
| 2024 | 62 | 43 |
| 2025 | 58 | 58 |
| 2026 | 43 | 43 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods of treating unconsolidated sand formations using a red mud sealant composition6 Oct 2026US 12,753,339 B2Saudi Arabian Oil Company
- Deflocculation additives for wellbore servicing fluid additives15 Sep 2026US 12,735,620 B2Halliburton Energy Services.Inc.
- Sealant compositions comprising red mud, subterranean operation fluids thereof, and related methods15 Sep 2026US 12,735,624 B1Saudi Arabian Oil Company
- Method of staged refracturing for fractured well15 Sep 2026US 12,735,967 B1Chongqing University
- System for maintaining reversible dynamic range control information associated with parametric audio coders15 Sep 2026US 12,738,288 B2Dolby International AB
- 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
- Method for Enhancing Formation Fracture Propagation Pressure17 Sep 2026US 2026/0275827 A1Chongqing University
- Method of staged refracturing for fractured well17 Sep 2026US 2026/0275842 A1Chongqing University
- Degradable fibers for water savings in hydraulic fracturing17 Sep 2026US 2026/0275844 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Method for treating multiple wellbore intervals339US 6,543,538 B2ExxonMobil Upstream Research Company · 2003
- Procedures and equipment for profiling and jointing of pipes319US 6,457,532 B1Weatherford/Lamb, Inc. · 2002
- Oil recovery method and apparatus312US 4,305,463 AOil Trieval Corporation · 1981
- Disposal of produced formation fines during oil recovery300US 4,787,452 AMobil Oil Corporation · 1988
- Methods of sealing subterranean zones265US 5,913,364 AHalliburton Energy Services.Inc. · 1999