Subsea Wellhead Patents: Who Leads, Where the Gaps Are 2026
Subsea wellhead and guide base patents: who holds the claims, and where the field is still open
Concentrated at the top. The five leading assignees hold 50.7% of all 621 records in scope, and the leading ten hold 67.5% — a field where a handful of legacy oilfield names still set the terms. Filings rose to a peak of 19 in 2020, and the years since sit below that peak. Because publication lags filing by roughly eighteen months, the final one or two years on the chart will revise upward as more filings publish.
- 1WEATHERFORD TECHNOLOGY HOLDINGS LLC94
- 2VETCO GRAY INC85
- 3PLEXUS HOLDINGS PLC58
- 4HALLIBURTON CO42
- 5CAMERSON INT CORP36
See the full subsea wellhead and guide base 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 on subsea wellhead patents
Who are the leading patent holders in subsea wellhead and guide base systems?
The dataset ranks 100 assignees by record count, with the leading company holding 94 records against 36 for the fifth-ranked assignee — a wide gap. The top five assignees combined account for 50.7% of all 621 records in scope, and the top ten account for 67.5%. These leading names are established oilfield equipment and drilling services companies rather than new entrants, so most core wellhead hardware claim space is already occupied by a small group.
Is subsea wellhead patent filing activity growing or slowing down?
Filing peaked at 19 records in a single year in 2020 and has not returned to that level since in the years with complete data. A precise growth rate cannot be computed because fewer than four complete years remain once publication lag is accounted for. Readers should treat the most recent one to two years on any trend chart as undercounted, since publication typically lags filing by roughly eighteen months.
What technology areas do subsea wellhead patents cover?
The overwhelming majority, 85.8% of the 621 records, carry an E21B classification covering earth and rock drilling equipment including wellhead and casing hardware. Smaller shares fall into pipes and fittings, valves, and seals and gaskets, each in the single digits. Connectors, powder metallurgy, foundations and additive manufacturing each account for under 2% of records, marking them as comparatively under-claimed relative to the core drilling hardware cluster.
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 Subsea Wellhead and Guide Base 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.