E21B 41/0042
Characterised by sealing the junction between a lateral and a main bore
Official title: {characterised by sealing the junction between a lateral and a main bore}
E21B41/0042 (Characterised by sealing the junction between a lateral and a main bore) appears on 326 US grants and 267 published applications in this corpus.
Search patents in E21B- Granted patents
- 326
- Published applications
- 267
- Assignees
- 61
- Inventors
- 406
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 8 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 10 | 0 |
| 2000 | 23 | 0 |
| 2001 | 21 | 7 |
| 2002 | 18 | 22 |
| 2003 | 11 | 13 |
| 2004 | 19 | 28 |
| 2005 | 14 | 22 |
| 2006 | 17 | 6 |
| 2007 | 14 | 4 |
| 2008 | 4 | 4 |
| 2009 | 5 | 3 |
| 2010 | 2 | 4 |
| 2011 | 5 | 7 |
| 2012 | 4 | 7 |
| 2013 | 3 | 5 |
| 2014 | 7 | 5 |
| 2015 | 5 | 7 |
| 2016 | 2 | 7 |
| 2017 | 10 | 9 |
| 2018 | 3 | 12 |
| 2019 | 10 | 7 |
| 2020 | 17 | 17 |
| 2021 | 13 | 18 |
| 2022 | 13 | 12 |
| 2023 | 12 | 9 |
| 2024 | 10 | 10 |
| 2025 | 12 | 19 |
| 2026 | 15 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Slidable isolation sleeve with I-shaped seal6 Oct 2026US 12,753,675 B2Halliburton Energy Services.Inc.
- Downhole fluid separator in lateral of re-entry multilateral well1 Sep 2026US 12,723,500 B2Halliburton Energy Services.Inc.
- Multilateral junction including an expandable sealing element21 Jul 2026US 12,687,090 B2Halliburton Energy Services.Inc.
- Multilateral mainbore completion employing an expandable metal anchor30 Jun 2026US 12,669,035 B2Halliburton Energy Services.Inc.
- Systems for generating energy from geothermal sources and methods of operating and constructing same30 Jun 2026US 12,669,269 B2Roda Energy Corporation
- Retrievable, below junction, esp, and other devices24 Sep 2026US 2026/0286811 A1Halliburton Energy Services.Inc.
- Systems for Generating Energy from Geothermal Sources and Methods of Operating and Constructing Same24 Sep 2026US 2026/0287213 A1Roda Energy Corporation
- Two part milling and running tool employing a body lock ring17 Sep 2026US 2026/0275830 A1Halliburton Energy Services.Inc.
- Retrofittable Dual Flow Path Mandrel18 Dec 2025US 2025/0382857 A1Saudi Arabian Oil Company
- Whipstock with detachable whipface and sealing capabilities for multilateral systems27 Nov 2025US 2025/0361797 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means361US 5,388,648 ABaker Hughes Incorporated · 1995
- Expandable wellbore junction301US 6,135,208 AHalliburton Energy Services.Inc. · 2000
- Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means292US 5,318,122 ABaker Hughes Incorporated · 1994
- Downhole equipment, tools and assembly procedures for the drilling, tie-in and completion of vertical cased oil wells connected to liner-equipped multiple drainholes290US 5,462,120 AS-Cal Research Corp. · 1995
- Creating zonal isolation between the interior and exterior of a well system284US 6,070,671 AShell Oil Company · 2000