Water-Based Drilling Fluid Patents: Top Companies & Trends 2026
Water-Based Drilling Fluid Systems: Patents, Leading Filers and Where Claim Space Is Still Open
48.0% of all 791 records sit with just five assignees, so the core shale-inhibition and fluid-loss claim space is already dense before you draft. Annual filings ran from 15 records in 2017 up to a peak of 27 in 2018. The only span long enough to trust as a trend rather than noise is 2021 to 2024, where filings dropped from 27 to 18 records — a 33% decline. Years after 2024 are still filling in under the roughly 18-month publication lag and should not be read as confirming a continued fall.
- 1HALLIBURTON ENERGY SERVICES INC219
- 2SAUDI ARABIAN OIL CO82
- 3LUBRIZOL OILFIELD SOLUTIONS INC29
- 4M I LLC(US)27
- 5CHEVRON PHILLIPS CHEMICAL COMPANY LP23
See the full water based drilling fluid systems analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about this landscape
Who holds the most patents in water-based drilling fluid systems?
One assignee leads the ranked field with 219 records, well ahead of the fifth-place filer at 23. The top five assignees combined hold 380 records, or 48.0% of the 791 records in scope, meaning nearly half the field’s patent activity sits with a small group of companies. Beyond the top ten (59.3% combined), the remaining 90 ranked companies form a long tail with only a handful of filings each, so competitive risk is concentrated rather than evenly spread.
Is patent filing in this field growing or slowing down?
Filing peaked in 2018 at 27 records and has since pulled back; the most recent complete three-year comparison, 2021 to 2024, shows a 33% decline from 27 to 18 records. Data from 2025 onward is still incomplete because publication typically lags filing by about 18 months, so it should not yet be read as confirming further decline. On the evidence available, the honest read is a cooling field rather than a growing one.
What technical areas are most claimed versus still open?
C09K (materials for miscellaneous applications) touches 90.1% of the 791 records and E21B (earth and rock drilling) touches 34.4%, making these the densest claim space. Narrower classes tied to water treatment (C02F, 2.5%), polysaccharide chemistry (C08B, 2.0%) and acyclic/carbocyclic compounds (C07C, 2.1%) are lightly claimed by comparison. That gap can mean either genuine white space or chemistries that have not proven out commercially, and record counts alone will not distinguish the two.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Water Based Drilling Fluid Systems covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.