E21B 33/14
For cementing casings into boreholes
Official title: for cementing casings into boreholes
E21B33/14 (For cementing casings into boreholes) appears on 2,219 US grants and 2,062 published applications in this corpus.
Search patents in E21B- Granted patents
- 2,219
- Published applications
- 2,062
- Assignees
- 476
- Inventors
- 3,136
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 8 | 0 |
| 1980 | 9 | 0 |
| 1981 | 8 | 0 |
| 1982 | 10 | 0 |
| 1983 | 16 | 0 |
| 1984 | 17 | 0 |
| 1985 | 7 | 0 |
| 1986 | 12 | 0 |
| 1987 | 18 | 0 |
| 1988 | 14 | 0 |
| 1989 | 14 | 0 |
| 1990 | 20 | 0 |
| 1991 | 16 | 0 |
| 1992 | 21 | 0 |
| 1993 | 18 | 0 |
| 1994 | 47 | 0 |
| 1995 | 27 | 0 |
| 1996 | 20 | 0 |
| 1997 | 13 | 0 |
| 1998 | 27 | 0 |
| 1999 | 16 | 0 |
| 2000 | 15 | 0 |
| 2001 | 17 | 10 |
| 2002 | 23 | 38 |
| 2003 | 36 | 38 |
| 2004 | 33 | 68 |
| 2005 | 28 | 40 |
| 2006 | 47 | 35 |
| 2007 | 47 | 28 |
| 2008 | 27 | 50 |
| 2009 | 32 | 38 |
| 2010 | 29 | 34 |
| 2011 | 19 | 44 |
| 2012 | 31 | 50 |
| 2013 | 28 | 45 |
| 2014 | 35 | 79 |
| 2015 | 49 | 88 |
| 2016 | 66 | 146 |
| 2017 | 87 | 175 |
| 2018 | 120 | 219 |
| 2019 | 205 | 126 |
| 2020 | 170 | 132 |
| 2021 | 153 | 131 |
| 2022 | 124 | 112 |
| 2023 | 120 | 107 |
| 2024 | 134 | 118 |
| 2025 | 98 | 66 |
| 2026 | 62 | 45 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Thixotropic slurry with enhanced reliability for use in a wellbore8 Sep 2026US 12,729,335 B2Halliburton Energy Services.Inc.
- Cement system for CO2 injection and sequestration in mafic/ultramafic rock and method of use8 Sep 2026US 12,729,607 B2Protostar Group Ltd.
- Low profile stage collar and related methods for stage cementing operations8 Oct 2026US 2026/0309001 A1
- Wellhead assemblies and methods24 Sep 2026US 2026/0286801 A1Onesubsea, LLC
- Systems and methods for producing wellbore fluids10 Sep 2026US 2026/0266157 A1Exero Well Integrity
- Convertible Autofill Float Equipment Having Poppet Valve and Sliding Sleeve20 Aug 2026US 2026/0243146 A1Weatherford Technology Holdings, LLC
- Method and tool for cementing wellbore13 Aug 2026US 2026/0235012 A1Baker Hughes Oilfield Operations LLC
Most cited
By later US patents
- Downhole surge pressure reduction system and method of use340US 5,960,881 AJerry P. Allamon · 1999
- Method of creating a casing in a borehole325US 5,667,011 AShell Oil Company · 1997
- Procedures and equipment for profiling and jointing of pipes319US 6,457,532 B1Weatherford/Lamb, Inc. · 2002
- Method to cement a wellbore295US 5,409,071 AShell Oil Company · 1995
- Well casing flotation device and method259US 5,181,571 AUnion Oil Company of California · 1993