E21B 23/0419
Using down-hole motor and pump arrangements for generating hydraulic pressure
Official title: {using down-hole motor and pump arrangements for generating hydraulic pressure}
E21B23/0419 (Using down-hole motor and pump arrangements for generating hydraulic pressure) appears on 242 US grants and 198 published applications in this corpus.
Search patents in E21B- Granted patents
- 242
- Published applications
- 198
- Assignees
- 81
- Inventors
- 237
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 1 | 1 |
| 2003 | 2 | 2 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 2 | 2 |
| 2007 | 2 | 3 |
| 2008 | 2 | 0 |
| 2009 | 2 | 6 |
| 2010 | 0 | 11 |
| 2011 | 5 | 11 |
| 2012 | 12 | 13 |
| 2013 | 12 | 15 |
| 2014 | 15 | 22 |
| 2015 | 18 | 17 |
| 2016 | 19 | 13 |
| 2017 | 24 | 10 |
| 2018 | 12 | 7 |
| 2019 | 12 | 5 |
| 2020 | 6 | 12 |
| 2021 | 12 | 6 |
| 2022 | 5 | 7 |
| 2023 | 3 | 11 |
| 2024 | 8 | 9 |
| 2025 | 13 | 7 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods of manufacturing combination thrust-bearing and radial bearing apparatuses16 Jun 2026US 12,655,869 B2US Synthetic Corporation
- Sleeve and plug system and method31 Mar 2026US 12,590,518 B2Republic Oil Tools, LLC
- Downhole radial force tool assembly10 Mar 2026US 12,571,273 B2Welltec A/S
- Methodology and system for electronic control and acquisition of downhole valve20 Jan 2026US 12,529,285 B2Schlumberger Technology Corporation
- Electric submersible pump with active cooling13 Jan 2026US 12,523,131 B2Halliburton Energy Services.Inc.
- Individual or paired arm control in a wellbore tractor30 Jul 2026US 2026/0218579 A1Gowell Technology Norway AS
- Sleeve and plug system and method23 Jul 2026US 2026/0210221 A1Republic Oil Tools, LLC
- Extensible transition joint for control line protection12 Mar 2026US 2026/0071502 A1Halliburton Energy Services.Inc.
- System and method for electrical control of downhole well tools29 Jan 2026US 2026/0028896 A1Weatherford Technology Holdings, LLC
- Electric submersible pump with active cooling25 Dec 2025US 2025/0389174 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Diamond thrust bearing and method for manufacturing same434US 5,092,687 AAnadrill, Inc. · 1992
- Well drilling tool with diamond radial/thrust bearings383US 4,410,054 AMaurer Engineering Inc. · 1983
- Rotary drill bit including polycrystalline diamond cutting elements320US 7,866,418 B2US Synthetic Corporation · 2011
- Diamond bearing assembly291US 5,368,398 ACsir · 1994
- Thrust bearing for use in downhole drilling systems280US 5,480,233 A1996