E21B 17/025
Side entry subs
Official title: {Side entry subs}
E21B17/025 (Side entry subs) appears on 106 US grants and 59 published applications in this corpus.
Search patents in E21B- Granted patents
- 106
- Published applications
- 59
- Assignees
- 45
- Inventors
- 146
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 9 | 1 |
| 2002 | 0 | 1 |
| 2003 | 2 | 4 |
| 2004 | 5 | 5 |
| 2005 | 1 | 6 |
| 2006 | 4 | 1 |
| 2007 | 6 | 6 |
| 2008 | 4 | 2 |
| 2009 | 3 | 1 |
| 2010 | 2 | 0 |
| 2011 | 1 | 3 |
| 2012 | 0 | 2 |
| 2013 | 2 | 4 |
| 2014 | 3 | 0 |
| 2015 | 0 | 1 |
| 2016 | 3 | 3 |
| 2017 | 2 | 2 |
| 2018 | 3 | 1 |
| 2019 | 2 | 4 |
| 2020 | 2 | 1 |
| 2021 | 0 | 2 |
| 2022 | 2 | 5 |
| 2023 | 2 | 1 |
| 2024 | 3 | 2 |
| 2025 | 4 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for packaging components, assemblies and modules in downhole tools10 Mar 2026US 12,571,265 B2Baker Hughes Holdings LLC
- Downhole rotary slip ring joint to allow rotation of assemblies with electrical and fiber optic control lines23 Dec 2025US 12,503,920 B2Halliburton Energy Services.Inc.
- Downhole packer suitable for smart well completion16 Sep 2025US 12,416,215 B2Petroleo Brasileiro S.A. - Petrobras
- Well tool pressure compensating system and method4 Feb 2025US 12,215,550 B2Madis XL Ltd.
- Cable connectors for use downhole7 Jan 2025US 12,188,305 B2Oilfield Equipment Development Center Limited
- Downhole rotary slip ring joint to allow rotation of assemblies with three or more control lines20 Mar 2025US 2025/0092742 A1Halliburton Energy Services.Inc.
- Well tool pressure compensating system and method14 Nov 2024US 2024/0376787 A1Madis XL Ltd.
- Cable Connectors for Use Downhole25 Jan 2024US 2024/0026742 A1Oilfield Equipment Development Center Limited
- Seam-Sealed Pothead to Motor Connection19 Oct 2023US 2023/0332617 A1Baker Hughes Oilfield Operations LLC
- Downhole packer suitable for smart well completion29 Dec 2022US 2022/0412184 A1Petroleo Brasileiro S.A. - Petrobras
Most cited
By later US patents
- Method for running downhole tools and devices with coiled tubing276US 5,435,395 AHalliburton Company · 1995
- Straight line, pump through entry sub92US 6,202,764 B12001
- Well entry tool80US 5,803,191 A1998
- Wellpacker and a method of running an I-wire or control line past a packer80US 6,173,788 B1Baker Hughes Incorporated · 2001
- Top entry sub arrangement79US 5,284,210 A1994