Invert Emulsion Drilling Fluid Patents: Top Companies & Trends 2026
Invert Emulsion and Synthetic Drilling Fluid Patents: Who Leads and Where the Field Is Open
Concentrated at the top. the top 5 assignees hold 61.0% of all 720 records in scope, and the top 10 hold 73.2% — a small group of oilfield services and majors controls most of the claim space. Filings climbed from 31 in 2017 toward a peak of 33 in 2019, then eased; the tracked 2021-to-2024 comparison shows 8 falling to 6, a -25% move. Treat 2025 and 2026 as undercounted — publication typically lags filing by around 18 months, so recent years will fill in as more records publish.
- 1M I LLC(US)262
- 2CHEVRON PHILLIPS CHEMICAL COMPANY LP68
- 3HALLIBURTON ENERGY SERVICES INC50
- 4SAUDI ARABIAN OIL CO32
- 5BAKER HUGHES CO27
See the full invert emulsion and synthetic drilling fluids 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 on this landscape
Who holds the most patents in invert emulsion and synthetic drilling fluids?
One assignee leads the field with 262 of the 720 records in this dataset, well ahead of the fifth-ranked filer at 27 and the tenth at 15. The top 5 assignees combined hold 61.0% of all records, and the top 10 combined hold 73.2%, so the field is concentrated among a small group of oilfield services companies and majors. A long tail of smaller filers holds the remaining share, typically with a handful of records each.
Is patent filing in this field still growing?
Filing peaked at 33 records in 2019 after rising from 31 in 2017, and the tracked 2021-to-2024 window shows a decline from 8 to 6 filings, a -25% move. Figures for 2025 and 2026 look low but are not yet reliable, because publication typically lags filing by around 18 months. Read the recent tail as incomplete rather than as evidence the technology area has stopped attracting R&D investment.
What technology areas do these patents actually cover?
Most records sit in C09K, materials for miscellaneous applications, covering 74.7% of the 720 records in scope — this is where fluid formulation, additive and emulsion chemistry claims are filed. E21B, earth and rock drilling, covers 42.1% of records and includes wellbore and drilling-process claims. Smaller clusters cover condensation polymers, hydrocarbon oil refining, separation processes, cement chemistry, magnetic/electrostatic separation and geophysical surveying, each under 6% of records, marking narrower but distinct filing activity.
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 Invert Emulsion and Synthetic Drilling Fluids 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.