E21B 33/0385
Electrical connectors
Official title: {electrical connectors}
E21B33/0385 (Electrical connectors) appears on 122 US grants and 119 published applications in this corpus.
Search patents in E21B- Granted patents
- 122
- Published applications
- 119
- Assignees
- 74
- Inventors
- 258
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 2 |
| 2005 | 1 | 2 |
| 2006 | 0 | 6 |
| 2007 | 5 | 3 |
| 2008 | 2 | 2 |
| 2009 | 2 | 3 |
| 2010 | 4 | 1 |
| 2011 | 1 | 8 |
| 2012 | 4 | 1 |
| 2013 | 5 | 4 |
| 2014 | 2 | 5 |
| 2015 | 4 | 2 |
| 2016 | 3 | 10 |
| 2017 | 7 | 6 |
| 2018 | 5 | 6 |
| 2019 | 5 | 5 |
| 2020 | 10 | 9 |
| 2021 | 7 | 7 |
| 2022 | 7 | 11 |
| 2023 | 7 | 10 |
| 2024 | 9 | 5 |
| 2025 | 7 | 4 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Safety controls for electrical submersible pump systems28 Apr 2026US 12,612,917 B1Halliburton Energy Services.Inc.
- Submersible, high-voltage electrical connector10 Mar 2026US 12,573,789 B2
- Spiral lock electrical connection assembly3 Feb 2026US 12,542,380 B2Innovex Downhole Solutions, Inc.
- Method and system for deploying an electric submersible pump in a live well5 Aug 2025US 12,378,836 B2Schlumberger Technology Corporation
- Electrical connector5 Aug 2025US 12,381,354 B2Siemens Energy, Inc.
- Completing a wellbore with multiple electrical submersible pump docking stations2 Jul 2026US 2026/0185430 A1Saudi Arabian Oil Company
- Connections to subsea electrical equipment7 May 2026US 2026/0128579 A1Subsea 7 Norway AS
- Safety controls for electrical submersible pump systems30 Apr 2026US 2026/0117778 A1Halliburton Energy Services.Inc.
- Integral penetrator tubing hanger23 Apr 2026US 2026/0110231 A1Sonic Connectors Ltd.
- Harness12 Mar 2026US 2026/0071511 A1Baker Hughes Energy Technolo Gy UK Limited
Most cited
By later US patents
- Inductive-coupling connector for a well head equipment103US 5,052,941 ASchlumberger Technology Corporation · 1991
- Well installation in which electrical current is supplied for a source at the wellhead to an electrically responsive device located a substantial distance below the wellhead98US 4,852,648 AAVA International Corporation · 1989
- Modular subsea control system47US 6,644,410 B12003
- Apparatus for controlling the operation of an underwater installation43US 4,899,822 ACamco, Incorporated · 1990
- Submarine wellhead42US 5,213,162 ASociete Nationale Elf Aquitaine (Production) · 1993