F16L 55/46
Launching or retrieval of pigs or moles
F16L55/46 (Launching or retrieval of pigs or moles) appears on 303 US grants and 269 published applications in this corpus.
Search patents in F16L- Granted patents
- 303
- Published applications
- 269
- Assignees
- 187
- Inventors
- 600
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 10 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 1 |
| 2002 | 8 | 11 |
| 2003 | 7 | 3 |
| 2004 | 5 | 2 |
| 2005 | 6 | 2 |
| 2006 | 0 | 2 |
| 2007 | 0 | 7 |
| 2008 | 1 | 9 |
| 2009 | 4 | 7 |
| 2010 | 3 | 9 |
| 2011 | 7 | 9 |
| 2012 | 9 | 7 |
| 2013 | 3 | 14 |
| 2014 | 13 | 11 |
| 2015 | 12 | 7 |
| 2016 | 9 | 15 |
| 2017 | 10 | 7 |
| 2018 | 9 | 20 |
| 2019 | 24 | 14 |
| 2020 | 15 | 21 |
| 2021 | 14 | 24 |
| 2022 | 9 | 16 |
| 2023 | 22 | 18 |
| 2024 | 15 | 14 |
| 2025 | 12 | 12 |
| 2026 | 10 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus for cleaning and inspecting oil well drilling mud flow lines25 Aug 2026US 12,715,025 B1Tri-State Environmental, LLC
- Pipeline pig catcher18 Aug 2026US 12,710,124 B2Anti-Pollution Innovations, LP
- Resident subsea pig launcher and receiver station21 Jul 2026US 12,687,251 B2Petroleo Brasileiro S.A. - Petrobras
- Cleaning module for a pipeline inspection gauge16 Jun 2026US 12,655,928 B2Entegra LLP
- Method and system for mapping and inspecting live fluid pipes9 Jun 2026US 12,650,195 B2Reduct NV
- A device for detecting blockages in water pipes, and a method for detecting blockages by means of such a device20 Aug 2026US 2026/0243382 A1Aganova S.L.
- Separation of cleaning bodies from a stream of fluid30 Jul 2026US 2026/0219000 A1Taprogge GmbH
- System for determining conditions within a pipeline2 Jul 2026US 2026/0185645 A1Saudi Arabian Oil Company
- Method for operating a working apparatus in a pipeline, and working apparatus25 Jun 2026US 2026/0177184 A1
- Inspection method11 Jun 2026US 2026/0160643 A1ROLLS-ROYCE plc
Most cited
By later US patents
- Method for remotely launching subsea pigs in response to wellhead pressure change97US 6,022,421 ASonsub International Ltd. · 2000
- Methods and apparatus for purging liquid from an offshore pipeline and/or scanning a pipeline interior74US 3,961,493 ABrown & Root, Inc. · 1976
- Oil field pig launcher and receiver66US 4,073,303 A1978
- Method of inserting a sensor into a pipeline54US 5,612,499 ATDW Delaware, Inc. · 1997
- Method and apparatus for cleaning a drill string54US 8,646,521 B22014