Sand Control Patents: Who Leads, Where the Gaps Are 2026
- 71.1% of all filings sit with five companies. 2,438 of the 3,430 records in scope belong to the top five assignees, with the leader alone holding 855 — this is a field defined by a handful of incumbents, not a fragmented one.
- Filing pace has eased, not collapsed. From 2021's 73 filings to 2024's 60 — the last year with a complete count — the field is down 18%, following a 2018 peak of 118.
- E21B dominates the classification, but the edges are thin. 91.4% of records sit in earth and rock drilling (E21B), while adjacent classes like implants (A61F, 0.9%) and water supply (E03B, 1.0%) barely register — a sign of narrow technical framing across the corpus.
Filing growth compares 2021 (73 records) with 2024 (60) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 3,430 records in scope (CR5), not by the ranked leaders only.
What the sand control and gravel packing patent record actually shows
Sand control and gravel packing sits at the intersection of completions engineering and materials science: screens, shunt tubes, expandable liners and slurry placement techniques designed to keep unconsolidated formation sand out of production tubing. The 3,430 records in scope span 2015 through the middle of 2026, covering everything from alpha-wave gravel placement theory to expandable sand screen mechanics. Publication lags filing by roughly 18 months, so the most recent one or two years understate real activity.
The classification data points to a technically narrow field: nearly all records carry an E21B (earth and rock drilling) class, with only small overflow into materials, geophysics, pipe fittings and separation processes. That narrowness, combined with a leaderboard where ten companies hold 91.4% of all records, suggests most of the open technical territory lies not in wholly new categories but in under-claimed combinations within and adjacent to the dominant class.
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Filing trends and technology composition
Two views of the same 3,430 records: how filing volume has moved year over year, and how those records classify across IPC subclasses. Both use the full record count as denominator.
Filing trend: peak in 2018, gradual pull-back since
Annual filings rose from 25 in 2017 to a peak of 118 in 2018, then eased. The 2021-to-2024 span — the last year with a complete count — shows a decline from 73 to 60 filings, an 18% drop. Treat 2025 and 2026 figures as provisional; they will revise upward as publications catch up.
IPC composition: E21B carries the field
E21B (earth and rock drilling for wells) appears in 91.4% of all 3,430 records, dwarfing every other class. C09K (materials, 6.7%), A45C (3.5%), G01V (1.9%), F16L (1.4%), B01D (1.3%), E03B (1.0%) and A61F (0.9%) round out the mix — each a minor overlay rather than a distinct filing cluster.
Shares are the percentage of the 3,430 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Sand Control and Gravel Packing with Eureka
This page is one run against one query. Ask Eureka your own question about sand control and gravel packing and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art shaping this field
Sand control system and method for controlling sand production (US20090151942A1)
A method for controlling sand production in a well drilled in a subterranean formation comprising installing an expandable sand screen assembly in the well. The expandable sand screen assembly comprises an expandable sand screen in an unexpanded configuration. A slurry is pumped down the well and circulated through the annular space defined by the expandable sand screen and the formation. The expandable sand screen is expanded thereby dehydrating the slurry in the annular space.Filed by an individual inventor rather than one of the concentrated incumbents — a reminder that the leaderboard's dominance does not close off individual filings entirely.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20050199401A1 | System and Method to Seal Using a Swellable Material | 459 |
| 2 | US6112817A | Flow control apparatus and methods | 361 |
| 3 | WO1999023354A1 | Expandable downhole tubing | 323 |
| 4 | US5515915A | Well screen having internal shunt tubes | 321 |
| 5 | US5868200A | Alternate-path well screen having protected shunt connection | 277 |
| 6 | US6569814B1 | Fluids and techniques for hydrocarbon well completion | 275 |
| 7 | US20090114386A1 | Systems and methods for distributed interferometric acoustic monitoring | 258 |
| 8 | US20040149431A1 | Method and apparatus for a monodiameter wellbore, monodiameter casing and monobore | 251 |
| 9 | US7066284B2 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell | 233 |
| 10 | WO2003008756A1 | Wellbore system with annular seal member | 203 |
Citation counts inside a searched corpus favour older records; read them as markers of influence on later filings, not as a signal of current commercial relevance.
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Browse MCP servers →What the data means for filing strategy
Three patterns worth acting on before drafting claims or scoping freedom-to-operate in this space.
The leaderboard is not a level field
With 2,438 of 3,430 records held by five companies and the single leader alone at 855, new entrants are filing into a space where core screen and shunt-tube mechanics are already densely claimed by incumbents.
Volume is easing from a 2018 peak, not accelerating
The field peaked at 118 filings in 2018 and has since pulled back; the 2021-to-2024 window shows a confirmed 18% decline. This is consolidation of claim space, not technology maturity — dense filing history does not mean the underlying problem is solved.
Nearly everything sits in one class
Overflow into materials (C09K, 6.7%), geophysics (G01V, 1.9%) and separation processes (B01D, 1.3%) is thin. A field this narrowly classified often has under-explored combinations at its class boundaries rather than genuinely new categories.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to sand control and gravel packing, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Schlumberger Technology LLC | Schlumberger Limited | 110 |
| Schlumberger Holdings Limited | Schlumberger Technology LLC | 79 |
| Schlumberger Holdings Limited | Schlumberger Limited | 77 |
| Schlumberger Technology LLC | Services Petroliers Schlumberger SA (Prad Research and Development) | 71 |
| Schlumberger Holdings Limited | Services Petroliers Schlumberger SA (Prad Research and Development) | 69 |
| Schlumberger Limited | Services Petroliers Schlumberger SA (Prad Research and Development) | 67 |
| Schlumberger Technology LLC | Schlumberger Canada Limited | 61 |
| Schlumberger Canada Limited | Schlumberger Limited | 61 |
All ten recorded co-assignee pairs involve entities within the same corporate group, reflecting internal IP restructuring rather than cross-company joint filings — there is no evidence in this dataset of collaborative filing between competing incumbents.
Who holds the ground, and where momentum is shifting
The ranking covers 100 companies as returned by the data endpoint — not a top-50 or top-100 cut, but the full ranked set. Activity above the fifth position accounts for the large majority of all filings.
One company sets the pace
The leading assignee holds 855 of the 3,430 records in scope, well ahead of the field. Combined with the next four ranked companies, the top five account for 71.1% of all filings.
A steep drop after the top five
Fifth position holds 288 records; by tenth position that has fallen to 100. The top ten together hold 91.4% of all records, leaving a long tail of single- and few-filing entrants below them.
Latest-year activity is thin across the board
Recent-year counts by assignee are small in absolute terms — a handful of filings each — with one entity moving from a low base at +100% year-over-year while a major incumbent shows a -100% drop to zero in the latest year. These swings reflect the low volume typical of the most recent, still-incomplete filing year rather than a structural shift.
| Assignee | Recent year | YoY |
|---|---|---|
| Schlumberger Technology LLC | 4 | +100% |
| Schlumberger Technology Corp | 1 | -50% |
| Schlumberger Canada Limited | 1 | — |
| Schlumberger Limited | 1 | — |
| Halliburton Energy Services, Inc. (US) | 0 | -100% |
| Weatherford Lamb, Inc. | 0 | — |
| Schlumberger Holdings Limited | 0 | — |
| ExxonMobil Upstream Research Company | 0 | — |
Where to take this analysis
The trends above point to where claim space is dense and where it thins out. Turning that into a filing or FTO decision means going deeper on the specific mechanics involved.
Map freedom-to-operate against the top five
With 71.1% of records held by five companies, any new expandable screen or shunt-tube filing needs a claim-by-claim check against their active families before drafting.
Explore assignee portfolios in EurekaProbe the under-claimed boundary classes
Classes like A61F, E03B and B01D show minimal overlap with the core E21B cluster — worth checking whether analogous mechanisms from those domains have been transplanted into sand control claims.
Run a white space search in EurekaTrack the next publication cycle
2025 and 2026 filing counts are still incomplete due to publication lag; revisit the trend once another 18 months of data lands to see whether the 2021-2024 pull-back continues.
Set up monitoring in EurekaCommon questions about sand control and gravel packing patents
One assignee leads the field with 855 of the 3,430 records in scope, and the top five companies together hold 71.1% of all filings. This level of concentration means the leaderboard is dominated by a small number of oilfield services incumbents rather than a broad field of independent filers. Any competitive analysis in this space should start with those top five before looking at the long tail of smaller filers.
Filings peaked in 2018 at 118 for the year, and the most recent complete comparison — 2021 at 73 filings versus 2024 at 60 — shows an 18% decline. That is a real pull-back from peak activity, not a collapse. Figures for 2025 and 2026 are still incomplete because publication typically lags filing by around 18 months, so it is too early to call the current trajectory.
The overwhelming majority of records, 91.4% of 3,430, classify under E21B, the IPC subclass for earth and rock drilling in wells — covering screens, shunt tubes and related completion hardware. Materials science (C09K) accounts for 6.7%, with much smaller overlaps into geophysics, pipe fittings, separation processes, water supply and implant-adjacent classes. The narrowness of this spread suggests most patent activity is mechanical and materials-focused rather than spanning into adjacent domains.
US20090151942A1 describes a method for controlling sand production using an expandable sand screen that is run into the well unexpanded, then expanded while a slurry is circulated and dehydrated in the annular space between screen and formation. It is a representative example of the expandable-screen-plus-slurry-dehydration approach that recurs across the corpus's most-cited prior art. Anyone drafting claims around expandable screens or slurry-based sand control should review it as part of a freedom-to-operate check, alongside the higher-citation records in the same cluster.
The classification data points to boundary classes with minimal filing activity — implants and prostheses (A61F) at 0.9%, water supply and distribution (E03B) at 1.0%, and separation processes (B01D) at 1.3% of the 3,430 records — as areas barely touched relative to the dominant E21B cluster. Sub-mechanisms like alpha-wave gravel placement modelling, openhole gravel-pack slurry dehydration and screen slot-size optimisation also show thinner coverage than core screen geometry claims. These are reasonable starting points for a novelty search rather than guaranteed open ground, since thin classification data does not rule out unclassified prior art.
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.