Directional Drilling Well Completion Patent Landscape 2026
Halliburton Energy Services leads a moderately concentrated field with the top five filers holding roughly one-third of the hundred largest filers’ combined output, while Chinese academic and coal-industry institutions collectively represent the majority of recent activity. The field is in a growth stage on a multi-year basis, though annual volume has eased from its 2023 peak.
Halliburton leads, but Chinese institutions collectively define the competitive center of gravity
Halliburton Energy Services holds the top position in the applicant ranking with 51 patent records, followed by Eavor Technologies at 26, China Coal Technology and Engineering Group Corp at 20.
The top five filers account for 32% of the hundred largest filers’ combined total, indicating moderate concentration — no single player dominates decisively. Below the top two Western oilfield-services firms, a dense second tier of Chinese coal-industry research institutes and mining universities occupies most of the remaining ranking slots.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Halliburton Energy Services Inc | 51 | |
| 2 | Eavor Technologies Inc | 26 | |
| 3 | CHINA UNIV OF MINING & TECH | 23 | |
| 4 | CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD | 22 | |
| 5 | XIAN RES INST OF CHINA COAL TECH & ENG GRP CORP | 20 | |
| 6 | CHINA UNIV OF MINING & TECH (BEIJING) | 16 | |
| 7 | ENN SCI & TECH DEV | 15 | |
| 8 | ENN Coal Gasification Mining Co Ltd | 13 | |
| 9 | Henan Polytechnic University | 13 | |
| 10 | Baker Hughes Company | 13 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Chongqing University | 11 | |
| 12 | Catalana de Perforacions | 10 | |
| 13 | Taiyuan University of Technology | 8 | |
| 14 | CCTEG Coal Mining Research Institute | 7 | |
| 15 | TIANDI SCI & TECH CO LTD | 6 | |
| 16 | Inner Mongolia Research Institute of China University of Mining and Technology | 6 | |
| 17 | Huainan Mining Industry Group | 6 | |
| 18 | Xinjiang Guoliheng Clean Energy Technology Co Ltd | 6 | |
| 19 | Target Drilling LLC | 5 | |
| 20 | China Coal Energy Research Institute Co Ltd | 5 |
Halliburton’s position reflects decades of oilfield-services IP investment; Eavor’s ranking is notable as a newer entrant focused on closed-loop geothermal, signaling diversification of the directional-drilling application base beyond conventional oil and gas. The Chinese institutional cluster suggests state-directed R&D in coal-mine gas drainage as a primary driver of recent filing volume.
The most recent 18–24 months are likely under-represented due to patent publication lag; current activity levels are probably higher than the raw counts suggest. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Multi-year growth persists despite an easing from the 2023 filing peak; E21B dominates the technology mix
The annual filing trend and the IPC technology composition together reveal both the pace of competitive activity and the structural concentration of innovation within the core drilling subclass.
Annual filing trend
Filings rose from 13 in 2017 to a peak of 50 in 2023, with the recent three-year window sitting 28% above the prior three-year window — confirming growth-stage dynamics on a multi-year basis. The apparent softening in 2024 and the low 2026 count reflect publication lag rather than a real deceleration; treat those years as under-counted.
↗ Hover for values · click a bar to ask EurekaTechnology composition
E21B (Earth and rock drilling — wells) is overwhelmingly dominant, consistent with the core subject matter. E21F (mine safety and ventilation) forms a significant secondary branch, reflecting the coal-mine methane drainage application that drives much of the Chinese institutional activity. Branches such as F24T (geothermal systems), G01V (geophysics and gravity surveying), and C09K (specialty materials) each represent small but distinct sub-communities, indicating early-stage diversification into adjacent applications.
↗ 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.
Hydraulic fracturing pressure relief method for mu…
A hydraulic fracturing pressure relief method for multi-layer thick and hard roof of an extra-thick coal seam includes: obtaining an attitude of stratum of the multi-layer thick and hard roof using roof drilling technology; based on rock mechanics experimenting and roof visual 5 inspecting, evaluating a stability of the multi-layer thick and hard roof, and… (excerpt from the patent abstract)
Open this patent in Eureka →| # | Patent | Citations |
|---|---|---|
| 1 | Dynamic orienting reference system for directional… | 318 |
| 2 | Method and apparatus for drilling boreholes in ear… | 277 |
| 3 | Wellbore completion using measurement-while-drilli… | 198 |
| 4 | Formation conditioning process and system | 171 |
| 5 | Radial tie back assembly for directional drilling | 135 |
| 6 | Drilling liner systems | 111 |
| 7 | Less temperature dependent drilling fluids for use… | 98 |
| 8 | 煤层顶板梳状瓦斯抽采钻孔的成孔工艺方法 | 94 |
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 strategy
Four structural observations — maturity, concentration, collaboration, and geography — shape the investment calculus for any new or existing participant in this space.
Growth stage, easing from a 2023 peak
The lifecycle evidence positions this field firmly in Growth: the recent three-year filing window is 28% above the prior three-year window. However, annual volume peaked in 2023 and has since eased, so the field is expanding on a multi-year basis without accelerating further at the annual level. Entry timing remains viable but window-setting has moved past the earliest phase.
Growth stageModerate concentration with a deep Chinese institutional second tier
At 32% of the hundred largest filers’ combined total, the top five represent meaningful but not decisive concentration. Halliburton and Eavor sit clearly above the pack among Western filers, while the Chinese institutional tier — multiple universities and coal-group research institutes — collectively rivals or exceeds Western incumbents in volume. A new entrant can establish a meaningful position without confronting a single impenetrable leader.
Moderate concentrationUniversity–industry co-filing concentrated in Chinese coal-sector partnerships
The most active co-filing pair is China University of Mining and Technology (Beijing) with its Inner Mongolia Research Institute, at 6 joint filings. Chongqing University co-files with Guizhou Yuneng Investment (3 filings) and with Hebi Coal and Power Shancheng District No. 8 Coal Mine (2 filings). China University of Mining and Technology (main campus) has several single-filing industry partnerships. Western firms show no evident co-applicant activity in this dataset, leaving cross-border collaboration as an underexploited structural option.
China-centric co-filingChina dominates filings; US and EPO provide meaningful secondary coverage
China accounts for 270 patent records — by far the lead jurisdiction — followed by the United States at 61, Europe (EPO) at 22, and WIPO PCT at 20. Australia, Canada, and Russia carry smaller but non-trivial counts. This distribution reflects both the coal-mine methane drainage driver in China and the oilfield-services IP strategies of Western majors filing selectively across multiple jurisdictions.
China-led, globally filedGo 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 |
|---|---|---|
| China University of Mining and Technology (Beijing) | Inner Mongolia Research Institute of China University of Mining and Technology (Beijing) | 6 |
| China University of Mining and Technology (Beijing) | Shanxi Lu’an Environmental Energy Development Co Ltd Wuyang Coal Mine | 3 |
| Chongqing University | Guizhou Yuneng Investment Co Ltd | 3 |
| Chongqing University | Hebi Coal and Power Co Ltd Shancheng District No 8 Coal Mine | 2 |
| China University of Mining and Technology | Shaanxi Zhengtong Coal Industry Co Ltd | 1 |
| China University of Mining and Technology | Otog Front Banner Changcheng No 6 Mining Co Ltd | 1 |
| China University of Mining and Technology | Henan Longyu Energy Co Ltd Yongcheng Cheji Coal Mine | 1 |
| China University of Mining and Technology | Xinkuang Inner Mongolia Energy Co Ltd | 1 |
| China University of Mining and Technology | Yangzhou Zhongkuang Building New Materials Technology Co Ltd | 1 |
| China University of Mining and Technology | Xuzhou University of Technology | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Halliburton anchors Western oilfield-services IP; Eavor signals the geothermal pivot
Two Western firms sit clearly above the Chinese institutional cluster in overall patent record count, though their technology emphasis and recent momentum differ sharply.
Halliburton Energy Services
Halliburton holds 51 patent records — the largest individual position in the corpus — concentrated in E21B 43 (well production and stimulation), E21B 7 (drilling direction and deviation), and E21B 47 (measuring while drilling). Recent-period momentum is flagged as a new entrant pattern in the comparison window, suggesting the company’s activity in this specific sub-topic is relatively fresh rather than a long-standing dominant position. The portfolio breadth across production, directional control, and MWD reflects its full-stack oilfield-services strategy.
patent records: 51Eavor Technologies
Eavor Technologies holds 26 patent records and is the only top-ranked applicant with a substantial F24T (geothermal systems) component alongside E21B 43 and E21B 7, reflecting its closed-loop geothermal well technology. Recent momentum shows a sharp decline of 87% versus the prior period, which — given Eavor’s status as a scale-up — likely reflects a burst of foundational patent filings followed by a natural moderation rather than a strategic retreat. Its presence at rank two makes it the most distinctive technical outlier among the leaders.
patent records: 26| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Halliburton Energy Services Inc (USA) | 1 | ▲ new entrant |
| Eavor Technologies Inc | 3 | ▼ -87% |
| China University of Mining and Technology | 3 | ▲ new entrant |
| China Coal Technology and Engineering Group Chongqing Research Institute Co Ltd | 9 | ▲ new entrant |
| Xi’an Research Institute of China Coal Technology and Engineering Group Corp | 8 | ▲ new entrant |
| China University of Mining and Technology (Beijing) | 9 | ▲ new entrant |
| Henan Polytechnic University | 5 | ▲ new entrant |
| Chongqing University | 8 | ▲ new entrant |
Geothermal systems and geophysical surveying are sparse but technically adjacent sub-fields worth watching
Several IPC branches appear at low share relative to the dominant E21B core, representing under-served areas where directional drilling techniques could plausibly extend. Two stand out for their combination of low current filing density and clear technical connection to the core subject.
F24T · Geothermal systems
This branch holds only 20 patent records and a 3% share of the technology composition, yet Eavor Technologies’ top-two ranking is almost entirely built on it — confirming that closed-loop and enhanced geothermal systems represent a technically credible and commercially active adjacent application. The low count relative to E21B means the competitive landscape here is sparse; a firm with directional drilling completion expertise and geothermal project access could establish a defensible position. The entry path is clearest for companies already active in deep, high-temperature well construction.
Search this in Eureka →G01V · Geophysics & gravity surveying
G01V covers formation evaluation and subsurface imaging tools that are tightly coupled to directional drilling decisions, yet only 11 patent records appear here — a 1% share. This sparsity is notable because real-time geophysical feedback is integral to modern geosteering and well placement. The gap may reflect that the dominant players file this work under E21B 47 (MWD/LWD) rather than G01V, or it may represent a genuine under-investment in sensor-independent formation characterization methods. For a firm with data-analytics or sensor capability, this branch offers a low-density entry point adjacent to the core.
Search this in Eureka →How leading applicants differ by technology route across E21B subclasses and adjacent fields
Route coverage across the main technology branches in the current evidence set.
| Player | E21B 43 · Earth & rock drilling (wells) | E21B 7 · Earth & rock drilling (wells) | E21F 7 · Mine safety & ventilation | E21B 47 · Earth & rock drilling (wells) | E21B 33 · Earth & rock drilling (wells) |
|---|---|---|---|---|---|
| Halliburton Energy Services Inc (USA) | Strong · 44 | Strong · 25 | Absent | Moderate · 17 | Emerging · 3 |
| China Coal Technology and Engineering Group Chongqing Research Institute Co Ltd | Strong · 19 | Strong · 12 | Strong · 18 | Moderate · 6 | Moderate · 6 |
| Eavor Technologies Inc | Strong · 26 | Strong · 17 | Absent | Moderate · 7 | Moderate · 8 |
| Xi’an Research Institute of China Coal Technology and Engineering Group Corp | Strong · 20 | Strong · 12 | Strong · 12 | Emerging · 4 | Emerging · 3 |
| China University of Mining and Technology | Strong · 15 | Strong · 12 | Moderate · 6 | Emerging · 3 | Moderate · 6 |
| China University of Mining and Technology (Beijing) | Strong · 16 | Moderate · 8 | Moderate · 7 | Absent | Emerging · 2 |
| Baker Hughes Holdings LLC | Strong · 13 | Strong · 13 | Absent | Absent | Moderate · 3 |
Frequently asked questions
Halliburton Energy Services holds the top position with 51 patent records, ahead of Eavor Technologies at 26 and China University of Mining and Technology at 23.
China is the lead jurisdiction by a wide margin, accounting for 270 patent records. The United States is second at 61, followed by Europe (EPO) at 22 and WIPO PCT at 20.
The evidence classifies the field as Growth-stage: the recent three-year filing window is 28% above the prior three-year window. Annual volume peaked in 2023 and has eased since, but the multi-year trajectory remains upward. The most recent years are additionally under-counted due to publication lag.
E21B (Earth and rock drilling — wells) is overwhelmingly dominant, with 437 patent records. E21F (mine safety and ventilation) is a significant secondary branch at 129 records, driven largely by coal-mine methane drainage applications in China.
Co-filing activity is concentrated among Chinese academic and industry pairs. The most active partnership is China University of Mining and Technology (Beijing) with its Inner Mongolia Research Institute at 6 joint filings, followed by Chongqing University with Guizhou Yuneng Investment at 3 filings. Western firms show no evident co-applicant activity in this dataset.
F24T (Geothermal systems) and G01V (Geophysics and gravity surveying) are the most technically adjacent branches with low current filing density — 20 and 11 patent records respectively. E21C (Mining and quarrying) and E21D (Shafts, tunnels and mine support) are also sparse relative to E21B but are more narrowly application-specific.
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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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