Formation Evaluation (LWD) Patent Landscape 2026
Formation evaluation while drilling (LWD) is a highly concentrated field dominated by Halliburton Energy Services and the Schlumberger/SLB family of entities, together accounting for the majority of all activity. Annual filing volume peaked in 2017 and has eased significantly since, signalling a maturing, oligopolistic technology space rather than an open competitive frontier.
Halliburton and the SLB group dominate a highly concentrated field
Halliburton Energy Services leads the ranked applicant list with 661 patent records, followed closely by Schlumberger Tech Corp at 634 patent records. When the multiple Schlumberger/SLB legal entities are viewed as a group, their combined footprint substantially exceeds any single rival, confirming oligopolistic control.
The top five filers account for 64% of the combined total across the hundred largest filers — an unusually high concentration for an industrial technology segment — leaving Baker Hughes as the primary independent challenger at 308 patent records and a long tail of smaller participants.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Halliburton Energy Services Inc | 661 | |
| 2 | Schlumberger Tech Corp | 634 | |
| 3 | Schlumberger Technology BV | 376 | |
| 4 | Schlumberger Holdings Ltd | 367 | |
| 5 | Baker Hughes Co | 308 | |
| 6 | Services Petroliers Schlumberger SA | 304 | |
| 7 | Schlumberger Canada Ltd | 290 | |
| 8 | PRAD RES & DEV LTD | 204 | |
| 9 | Baker Hughes Oilfield Operations LLC | 49 | |
| 10 | National Oilwell Varco LP | 37 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Weatherford Technology Holdings LLC | 35 | |
| 12 | Saudi Aramco | 32 | |
| 13 | GeoQuest Systems BV | 22 | |
| 14 | Smith International Inc | 20 | |
| 15 | Shell Internationale Research Maatschappij BV | 19 | |
| 16 | National Oilwell DHT LP | 19 | |
| 17 | Motive Drilling Technologies | 19 | |
| 18 | Weatherford/Lamb Inc | 18 | |
| 19 | Landmark Graphics Corp | 17 | |
| 20 | IntelliServ LLC | 12 |
This level of concentration implies that Halliburton and SLB hold broad blocking positions in core LWD sensor physics, downhole telemetry, and formation measurement workflows, making clean freedom-to-operate pathways increasingly narrow for new entrants attempting head-on competition.
Filing counts for the most recent 18–24 months are subject to publication lag and are likely under-represented; the apparent step-down in 2025–2026 should not be read as a structural change until those cohorts mature. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Volume has retreated from its 2017 peak; E21B drilling methods remain the dominant technology branch
The filing trend and technology composition charts together reveal a field that built aggressively through the mid-2010s and has since contracted, while remaining anchored to a narrow set of core IPC classes covering downhole drilling and geophysical sensing.
Annual filing trend
Annual filings peaked at 126 records in 2017 and have trended downward, reaching 48–56 records per year in 2022–2023 before a partial uptick to 53 in 2024. The 2025 and 2026 figures (34 and 2 respectively) reflect publication lag and should not be treated as confirmed activity levels. The overall recent-window growth figure of -46% confirms volume has eased materially from its peak.
↗ Hover for values · click a bar to ask EurekaTechnology composition
E21B (earth and rock drilling — wells) dominates with 2,334 records, followed by G01V (geophysics and gravity surveying) at 1,094. All other classes are a fraction of these two, with G01N (material analysis and testing) a distant third at 168 records. This two-class concentration reflects the integrated hardware-plus-sensing nature of LWD tools, where downhole mechanical engineering and electromagnetic/nuclear sensing are inseparable.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Trajectory control for directional drilling using …
A method for controlling a drilling trajectory of a wellbore includes receiving a target trajectory reference of a drill bit within a wellbore from a formation model. The method also includes receiving real-time formation evaluation measurements from at least one sensor positioned within the wellbore and computing a target trajectory set-point change based… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Downhole combination tool | 428 |
| 2 | Downhole tools using artificial intelligence based… | 382 |
| 3 | Formation pressure measurement while drilling util… | 346 |
| 4 | Dynamic orienting reference system for directional… | 318 |
| 5 | Electromagnetic wave resistivity tool having a til… | 300 |
| 6 | Downhole tools using artificial intelligence based… | 292 |
| 7 | Rotary steerable well drilling system utilizing hy… | 280 |
| 8 | Control model for production wells | 277 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
Four structural features — maturity stage, applicant concentration, co-filing behaviour, and geographic focus — each carry distinct implications for how a new or incumbent player should position an LWD R&D programme.
Decline stage: annual volume has eased from its 2017 peak
The lifecycle assessment classifies this field as Decline, with annual filings easing back from the 2017 peak of 126 records. This does not mean the technology is obsolete, but it does indicate that the primary wave of broad-claim filing by incumbents has passed. R&D investment is more defensible when focused on differentiated sub-technologies rather than replicating core sensor physics already densely patented by the leaders.
Past-peak · DeclineTop five filers hold 64% share of the hundred largest filers
Halliburton, the consolidated SLB group, and Baker Hughes collectively own the overwhelming share of ranked filings, creating a near-impenetrable core in conventional LWD. Smaller players such as National Oilwell Varco (37 patent records), Weatherford Technology Holdings (35), and Saudi Aramco (32) occupy distinct niches but lack the portfolio depth to challenge the leaders across the full technology stack. New entrants are most viable in adjacent or emergent sub-fields rather than the established sensor-physics core.
OligopolyCo-filing is almost entirely intra-SLB group consolidation
The most active co-applicant pairs are all combinations of Schlumberger/SLB legal entities: Schlumberger Technology BV with SLB (265 co-filings), Schlumberger Technology BV with Schlumberger Holdings (215), and Schlumberger Holdings with SLB (211). Prad Research & Development is the fourth node in this intra-group network with co-filings reaching 178. This pattern reflects corporate IP consolidation across jurisdictions rather than external technology partnerships, and no significant cross-company collaboration pairs are evident in the evidence.
Intra-group onlyUnited States is the primary filing jurisdiction by a wide margin
The United States leads jurisdiction coverage with 1,139 records, followed by WIPO/PCT (410), Europe/EPO (294), the United Kingdom (274), and Canada (273). Norway (95) and Australia (91) reflect North Sea and offshore market relevance. China has only 26 records — notably low for a country with significant drilling activity — suggesting either strategic under-filing by incumbents or an opportunity for domestic Chinese players. Other producing-region markets such as Brazil (20), Malaysia (18), and the UAE (11) are lightly covered.
US-anchoredGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Schlumberger Technology BV | Services Petroliers Schlumberger SA | 265 |
| Schlumberger Technology BV | Schlumberger Holdings Ltd | 215 |
| Schlumberger Holdings Ltd | Services Petroliers Schlumberger SA | 211 |
| Schlumberger Technology BV | Prad Research & Development Ltd | 178 |
| Schlumberger Holdings Ltd | Prad Research & Development Ltd | 177 |
| Services Petroliers Schlumberger SA | Prad Research & Development Ltd | 173 |
| Services Petroliers Schlumberger SA | Schlumberger Canada Ltd | 154 |
| Schlumberger Technology BV | Schlumberger Canada Ltd | 148 |
| Schlumberger Holdings Ltd | Schlumberger Canada Ltd | 117 |
| Schlumberger Canada Ltd | Prad Research & Development Ltd | 117 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Halliburton leads on volume; SLB Tech Corp shows a rising recent trend
The two dominant forces — Halliburton Energy Services and the SLB/Schlumberger group — share the same core technology focus (E21B downhole measurement and G01V geophysical sensing) but diverge in recent momentum, with Halliburton showing a declining recent trend while Schlumberger Tech Corp has accelerated.
Halliburton Energy Services
With 661 patent records, Halliburton is the single largest ranked applicant in this corpus. Its technology focus is anchored in E21B 47 (downhole measurement, 501 records) and G01V 3 (electromagnetic geophysics, 177 records), with E21B 49 (formation testing, 132 records) rounding out a broad, integrated position. However, its recent filing trend has declined by -52% versus the prior three-year window, indicating a strategic pullback or portfolio consolidation rather than continued aggressive expansion.
patent records: 661Schlumberger Tech Corp (SLB)
Schlumberger Tech Corp ranks second with 634 patent records, and its recent filing trend is up +24% versus the prior period — the only top-tier entity showing positive momentum. Its technology emphasis mirrors Halliburton’s (E21B 47 at 315 records, E21B 49 at 216, G01V 3 at 93), but the rising trend suggests renewed investment in LWD IP, possibly tied to SLB’s digital and sensor modernisation programmes. Considered alongside related SLB entities, the group’s aggregate position substantially exceeds Halliburton’s.
patent records: 634| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Halliburton Energy Services Inc | 57 | ▼ -52% |
| Schlumberger Tech Corp | 51 | ▲ +24% |
| Schlumberger Technology BV | 14 | ▼ -26% |
| Services Petroliers Schlumberger SA | 19 | ▼ -21% |
| Schlumberger Canada Ltd | 14 | ▲ +40% |
| Baker Hughes Oilfield Operations LLC | 6 | ▼ -79% |
Under-served branches adjacent to the LWD core
Five IPC classes sit adjacent to the dominant E21B/G01V core with comparatively sparse coverage. Two stand out for their technical relevance to next-generation LWD capabilities and realistic entry paths for challengers or new entrants.
G06N · AI and machine learning models
G06N covers computing methods based on AI models and currently holds only 12 records in this corpus — a 1% share of the dominant E21B class. Given that several of the most-cited patents in this field already reference AI-based downhole analytics (including a top-cited patent titled ‘Downhole tools using artificial intelligence’), the sparse G06N filing activity suggests that AI-native approaches to real-time formation interpretation remain underclaimed. An entrant with strengths in physics-informed machine learning or neural inversion could build a differentiated position here without directly confronting the dense E21B core.
Search this in Eureka →G01R · Electric and magnetic measurement
G01R (electric and magnetic measurement) has 68 records — roughly 3% of the E21B count — despite electromagnetic methods being central to LWD resistivity and dielectric tools. This relative sparsity may reflect incumbents filing primarily under E21B rather than G01R, but it also creates room for specialists in advanced electromagnetic sensor design, multi-frequency antenna systems, or ultra-deepwater EM methods to establish a distinct IP footprint. The adjacent H01Q (antennas, 17 records) is similarly sparse, reinforcing the observation.
Search this in Eureka →How leaders differ by technology route across E21B and G01V sub-classes
Route coverage across the main technology branches in the current evidence set.
| Player | E21B 47 · Earth & rock drilling (wells) | E21B 49 · Earth & rock drilling (wells) | G01V 3 · Geophysics & gravity surveying | E21B 7 · Earth & rock drilling (wells) | E21B 17 · Earth & rock drilling (wells) |
|---|---|---|---|---|---|
| Halliburton Energy Services Inc | Strong · 501 | Moderate · 132 | Moderate · 177 | Moderate · 102 | Emerging · 63 |
| Schlumberger Tech Corp | Strong · 315 | Strong · 216 | Moderate · 93 | Emerging · 59 | Emerging · 27 |
| Schlumberger Technology BV | Strong · 212 | Strong · 118 | Moderate · 67 | Emerging · 19 | Emerging · 20 |
| Schlumberger Holdings Ltd | Strong · 193 | Strong · 119 | Moderate · 64 | Emerging · 23 | Emerging · 25 |
| Baker Hughes Co | Strong · 216 | Emerging · 37 | Moderate · 45 | Emerging · 43 | Moderate · 71 |
| Schlumberger Canada Ltd | Strong · 192 | Moderate · 93 | Moderate · 43 | Emerging · 24 | Emerging · 14 |
| Services Petroliers Schlumberger SA | Strong · 185 | Moderate · 86 | Moderate · 58 | Emerging · 17 | Emerging · 10 |
Frequently asked questions
The analysis covers 730 patent families in scope for formation evaluation while drilling, spanning global filings with the United States as the lead jurisdiction at 1,139 patent records.
Halliburton Energy Services leads with 661 patent records, followed by Schlumberger Tech Corp at 634 and Schlumberger Technology BV at 376. Baker Hughes Co ranks fifth with 308 patent records. The top five filers collectively account for 64% of the combined total across the hundred largest filers.
Annual filings peaked at 126 records in 2017 and have declined to the 48–56 range in 2022–2023, with a partial recovery to 53 in 2024. The lifecycle assessment classifies the field as Decline, with a recent-window growth figure of -46%. The 2025–2026 figures are subject to publication lag.
E21B (earth and rock drilling — wells) is the dominant branch with 2,334 records, followed by G01V (geophysics and gravity surveying) at 1,094. All other IPC classes are a fraction of these two, reflecting the hardware-and-sensing integration at the core of LWD tools.
The United States is the primary jurisdiction with 1,139 records. WIPO/PCT (410), Europe/EPO (294), the United Kingdom (274), and Canada (273) follow. China has only 26 records, notable given the scale of drilling activity there. Norway and Australia reflect North Sea and offshore relevance.
Two adjacent branches show relative sparsity with plausible technical value: G06N (AI and machine learning models, 12 records) and G01R (electric and magnetic measurement, 68 records). Both are technically relevant to next-generation LWD capabilities but remain underclaimed compared to the dense E21B core. These are observations of relative sparsity; entry viability depends on freedom-to-operate analysis and specific claim scope.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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