Well Testing & Pressure Transient Analysis Patents: Leaders 2026
Well Testing and Pressure Transient Analysis Patents
Oilfield service majors dominate the ranked list, with the leader holding 25 records against a fifth-place figure of 10 and a tenth-place figure of 7 across 47 ranked companies. Filings ran from 2 in 2017 to a peak of 10 in 2020. The last complete comparison the data supports is 2021 (5) against 2024 (4), a 20% decline; 2025 and 2026 are still filling in under publication lag and should not be read as a continued drop.
- 1SAUDI ARABIAN OIL CO25
- 2SCHLUMBERGER TECH CORP22
- 3BP CORP NORTH AMERICA INC18
- 4HALLIBURTON ENERGY SERVICES INC16
- 5SCHLUMBERGER TECHNOLOGY BV10
See the full well testing and pressure transient analysis 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 are the leading patent holders in well testing and pressure transient analysis?
The assignee ranking behind this dataset lists 47 companies, with the leading assignee holding 25 records — more than double the fifth-place figure of 10. Several related entities occupy adjoining positions near the top, which points to a single corporate group holding the deepest claim position rather than several independent competitors. Below the top few positions the ranking thins quickly into a long tail of companies holding only a handful of records each, typically specialist service providers or operators defending a narrow technical niche.
Is filing activity in this field growing or shrinking?
Filing peaked at 10 in 2020 and the most recent span the data can treat as complete, 2021 to 2024, shows a 20% decline from 5 filings to 4. Because publication typically lags filing by around 18 months, 2025 and 2026 figures are still filling in and should not be read as evidence of a continued drop. The honest read is a plateau after a 2020 peak, not a technology in decline.
Which technical sub-areas are most crowded, and which are still open?
E21B, covering earth and rock drilling methods, appears in 73.2% of the 127 records in scope, making it the densest claim territory by far. G01V (geophysics and gravity surveying) follows at 29.1%. By contrast, classes tied to AI-based interpretation (G06N), analogue computation (G06G) and flow metering (G01F) each sit under 4% of records, marking them as comparatively under-claimed relative to the drilling-centric core.
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 Well Testing and Pressure Transient Analysis 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.