C09K 8/424
Using "spacer" compositions
Official title: {using "spacer" compositions}
C09K8/424 (Using "spacer" compositions) appears on 181 US grants and 181 published applications in this corpus.
Search patents in C09K- Granted patents
- 181
- Published applications
- 181
- Assignees
- 48
- Inventors
- 288
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 3 |
| 2005 | 0 | 2 |
| 2006 | 4 | 7 |
| 2007 | 2 | 0 |
| 2008 | 3 | 3 |
| 2009 | 1 | 2 |
| 2010 | 1 | 3 |
| 2011 | 0 | 3 |
| 2012 | 0 | 5 |
| 2013 | 8 | 13 |
| 2014 | 5 | 8 |
| 2015 | 4 | 12 |
| 2016 | 4 | 10 |
| 2017 | 7 | 7 |
| 2018 | 6 | 25 |
| 2019 | 19 | 16 |
| 2020 | 26 | 21 |
| 2021 | 19 | 7 |
| 2022 | 10 | 9 |
| 2023 | 7 | 6 |
| 2024 | 7 | 8 |
| 2025 | 2 | 6 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for leak prevention18 Aug 2026US 12,709,959 B2Schlumberger Technology Corporation
- Method for forming high efficiency geothermal wellbores24 Feb 2026US 12,560,049 B2Eavor Technologies Inc.
- Methods for cementing wellbores utilizing spacer fluids that include surfactant packages27 Jan 2026US 12,534,660 B2Saudi Arabian Oil Company
- Wellbore servicing compositions containing a latex additive15 Jul 2025US 12,359,108 B1Halliburton Energy Services.Inc.
- Spacer fluids containing swellable abrasive particles20 May 2025US 12,305,115 B2Schlumberger Technology Corporation
- Settable scavenger spacer fluid for displacing drilling mud6 Aug 2026US 2026/0226337 A1Schlumberger Technology Corporation
- Cementing spacer30 Apr 2026US 2026/0117111 A1Riteks, Inc.
- System and method for leak prevention12 Feb 2026US 2026/0043307 A1Schlumberger Technology Corporation
- Cementing Compositions For Plugging Very Large Fracture Widths18 Dec 2025US 2025/0382515 A1Halliburton Energy Services.Inc.
- Methods for cementing wellbores utilizing spacer fluids that include surfactant packages16 Oct 2025US 2025/0320399 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Spacer fluids122US 5,030,366 AAtlantic Richfield Company · 1991
- Method and spacer fluid composition for displacing drilling fluid from a wellbore107US 5,866,517 AAtlantic Richfield Company · 1999
- Spacer composition and method of use99US 4,083,407 AThe Dow Chemical Company · 1978
- Aqueous displacement fluid compositions for use in wellbores90US 6,063,737 AShell Oil Company · 2000
- Fluid spacer composition for use in well cementing64US 4,588,032 AHalliburton Company · 1986