E21B 29/08
Cutting or deforming pipes to control fluid flow
E21B29/08 (Cutting or deforming pipes to control fluid flow) appears on 222 US grants and 132 published applications in this corpus.
Search patents in E21B- Granted patents
- 222
- Published applications
- 132
- Assignees
- 98
- Inventors
- 324
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 9 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 11 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 5 |
| 2004 | 1 | 5 |
| 2005 | 5 | 4 |
| 2006 | 8 | 4 |
| 2007 | 3 | 3 |
| 2008 | 6 | 2 |
| 2009 | 2 | 4 |
| 2010 | 5 | 0 |
| 2011 | 1 | 5 |
| 2012 | 0 | 3 |
| 2013 | 3 | 8 |
| 2014 | 5 | 12 |
| 2015 | 3 | 9 |
| 2016 | 12 | 14 |
| 2017 | 10 | 14 |
| 2018 | 9 | 1 |
| 2019 | 11 | 7 |
| 2020 | 6 | 6 |
| 2021 | 8 | 9 |
| 2022 | 8 | 4 |
| 2023 | 9 | 8 |
| 2024 | 5 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- BOP piston booster and bonnet assembly7 Oct 2025US 12,435,595 B2
- Methods of pre-testing expansion charge for selectively expanding a wall of a tubular, and methods of selectively expanding walls of nested tubulars22 Oct 2024US 12,123,272 B2
- Slot cutter system and operations10 Sep 2024US 12,084,934 B2Schlumberger Technology Corporation
- Advanced loading method for ball rotation cutting and method of use therefor6 Aug 2024US 12,055,003 B2Halliburton Energy Services.Inc.
- Device and apparatus16 Jul 2024US 12,037,859 B2Enovate Systems Limited
- Segmented expanding gun for plug and abandonment applications16 Jul 2026US 2026/0201763 A1Schlumberger Technology Corporation
- Rotary actuated shear and seal valve2 Oct 2025US 2025/0305385 A1Nxl Technologies Inc.
- Bop piston booster and bonnett assembly8 Aug 2024US 2024/0263534 A1Worldwide Oilfield Machine, Inc.
- Cutting wellhead gate valve by water jetting3 Aug 2023US 2023/0243223 A1Saudi Arabian Oil Company
- Patching construction method using a hydraulic variable-grade expansion tool for blocking during drilling1 Jun 2023US 2023/0167703 A1Southwest Petroleum University
Most cited
By later US patents
- Deformable member175US 6,896,049 B2Zeroth Technology Ltd. · 2005
- Rotatable ball valve apparatus and method98US 4,681,133 AHydril Company · 1987
- Downhole safety valve for subterranean well and method98US 4,944,351 ABaker Hughes Incorporated · 1990
- Method and apparatus for establishing communication with a downhole portion of a control fluid pipe93US 4,981,177 ABaker Hughes Incorporated · 1991
- Rotatable ball valve apparatus and method82US 4,703,807 AHydril Company · 1987