C09K 2208/18
Bridging agents, i.e. particles for temporarily filling the pores of a formation
Official title: Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
C09K2208/18 (Bridging agents, i.e. particles for temporarily filling the pores of a formation) appears on 245 US grants and 268 published applications in this corpus.
Search patents in C09K- Granted patents
- 245
- Published applications
- 268
- Assignees
- 74
- Inventors
- 439
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 1 |
| 2002 | 5 | 4 |
| 2003 | 2 | 4 |
| 2004 | 4 | 13 |
| 2005 | 4 | 9 |
| 2006 | 7 | 22 |
| 2007 | 10 | 13 |
| 2008 | 8 | 12 |
| 2009 | 7 | 15 |
| 2010 | 17 | 13 |
| 2011 | 14 | 10 |
| 2012 | 7 | 16 |
| 2013 | 9 | 12 |
| 2014 | 10 | 9 |
| 2015 | 9 | 13 |
| 2016 | 6 | 17 |
| 2017 | 7 | 5 |
| 2018 | 10 | 11 |
| 2019 | 3 | 3 |
| 2020 | 7 | 11 |
| 2021 | 12 | 15 |
| 2022 | 13 | 8 |
| 2023 | 9 | 7 |
| 2024 | 11 | 14 |
| 2025 | 11 | 7 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Lignin-based compositions and related hydrocarbon separation methods28 Jul 2026US 12,692,429 B2LignoSol IP Limited
- Low density oil-based wellbore fluids and methods thereof7 Apr 2026US 12,595,404 B2Schlumberger Technology Corporation
- Wellbore fluids including fluid loss materials comprising a polymer and a bridging material and related methods24 Feb 2026US 12,559,667 B2Schlumberger Technology Corporation
- Synergistic performance of amine blends in shale control2 Dec 2025US 12,486,444 B2Huntsman Petrochemical Corporation
- Self-destructive barite filter cake in water-based and oil-based drilling fluids14 Oct 2025US 12,441,925 B2King Fahd University of Petroleum and Minerals
- Method for Generating CO2 In Situ for Oilfield Applications Using Propylene Carbonate10 Sep 2026US 2026/0265602 A1Baker Hughes Oilfield Operations LLC
- Plugging agent composition and use thereof, and hydrocarbon reservoir plugging method6 Aug 2026US 2026/0226339 A1China Petroleum & Chemical Corporation
- Self-destructive barite filter cake in water-based and oil-based drilling fluids1 Jan 2026US 2026/0002066 A1King Fahd University of Petroleum and Minerals
- Self-destructive barite filter cake in water-based and oil-based drilling fluids1 Jan 2026US 2026/0002067 A1King Fahd University of Petroleum and Minerals
- Wellbore fluids including fluid loss materials, and related methods21 Aug 2025US 2025/0263598 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Well drilling and servicing fluids and methods of removing filter cake deposited thereby200US 6,494,263 B2Halliburton Energy Services.Inc. · 2002
- Well drilling and servicing fluids and methods of removing filter cake deposited thereby185US 6,422,314 B1Halliburton Energy Services.Inc. · 2002
- Methods and compositions for controlling lost circulation in subterranean operations150US 7,284,611 B2Halliburton Energy Services.Inc. · 2007
- Method for removing filtercake139US 6,143,698 ATetra Technologies, Inc. · 2000
- Method for removing filtercake129US 6,131,661 ATetra Technologies, Inc. · 2000