E21B 7/201
With helical conveying means
Official title: {with helical conveying means}
E21B7/201 (With helical conveying means) appears on 124 US grants and 81 published applications in this corpus.
Search patents in E21B- Granted patents
- 124
- Published applications
- 81
- Assignees
- 64
- Inventors
- 194
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 9 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 3 |
| 2005 | 0 | 0 |
| 2006 | 1 | 3 |
| 2007 | 3 | 1 |
| 2008 | 3 | 11 |
| 2009 | 2 | 2 |
| 2010 | 6 | 3 |
| 2011 | 3 | 3 |
| 2012 | 4 | 4 |
| 2013 | 5 | 3 |
| 2014 | 2 | 4 |
| 2015 | 3 | 7 |
| 2016 | 0 | 4 |
| 2017 | 6 | 8 |
| 2018 | 4 | 6 |
| 2019 | 7 | 4 |
| 2020 | 7 | 2 |
| 2021 | 4 | 1 |
| 2022 | 1 | 3 |
| 2023 | 2 | 0 |
| 2024 | 3 | 4 |
| 2025 | 3 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Multi-tool boring systems and methods of operating such systems15 Jul 2025US 12,359,512 B2Phoenix Boring, Inc.
- Rigless drilling and wellhead installation20 May 2025US 12,305,513 B2Vetco Gray Scandinavia.AS
- Auger boring using a pipe seal assembly to join together casing pipe sections4 Feb 2025US 12,215,551 B2Brocato Construction Company Inc.
- Apparatus and method for removing soil from a conduit6 Aug 2024US 12,055,041 B2Equinor Energy AS
- Multi-tool boring systems and methods of operating such systems16 Apr 2024US 11,959,338 B2ArcByt, Inc.
- Multi-Tool Boring Systems and Methods of Operating Such Systems9 Oct 2025US 2025/0314132 A1Phoenix Boring, Inc.
- Drilling unit and method for producing a foundation in soil and/or a foundation under water29 May 2025US 2025/0171978 A1
- Multi-Tool Boring Systems and Methods of Operating Such Systems4 Jul 2024US 2024/0218743 A1ArcByt, Inc.
- Rigless drilling and wellhead installation2 May 2024US 2024/0141731 A1Vetco Gray Scandinavia AS
- Multi-tool boring systems and methods of operating such systems21 Mar 2024US 2024/0093557 A1ArcByt, Inc.
Most cited
By later US patents
- Running bore-lining tubulars74US 7,849,927 B2Deep Casing Tools, Ltd. · 2010
- Propulsion process of buried pipe67US 5,169,264 AKidoh Technical Ins. Co., Ltd. · 1992
- Apparatus for guiding and steering earth boring casing52US 5,099,927 A1992
- Apparatus and method for steering a pipe jacking head52US 5,163,520 ALag Steering Systems · 1992
- Methods and apparatus for wellbore construction and completion47US 7,311,148 B2Weatherford/Lamb, Inc. · 2007