How Oil Wells Send Acoustic Signals Using Mechanical Hammers
A device that uses pressure differences to slam a piston against a metal surface, creating a specific sound vibration that acts as a signal for deep-well operations.
Original patent title: “Hydro-mechanical sounding device for use with acoustic telemetry system”
A device that uses pressure differences to slam a piston against a metal surface, creating a specific sound vibration that acts as a signal for deep-well operations. Granted to Weatherford Technology Holdings LLC in 2025 with 27 claims.
Key facts
Coverage
What does this patent actually cover?
This device acts like an underwater bell for oil wells. It uses the pressure difference between the inside of a pipe and the surrounding wellbore to push a piston against a striking surface. By carefully changing the size, shape, and spacing of outlet ports in the housing, the device can tune the acoustic vibration to have specific frequencies or patterns. This allows operators to send distinct signals through the drill string to a receiver at the surface, confirming that a tool deep underground has successfully performed its task.
The gap
What does this patent NOT cover?
- Does not cover electronic or battery-powered acoustic signal generators.
- Does not cover systems that rely on mud-pulse telemetry (pressure waves in drilling fluid) rather than mechanical vibration.
- Does not cover wireless signals transmitted through the rock formation itself.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
By treating the outlet ports as a tuning mechanism, the inventors turned a simple mechanical impact into a programmable signal generator, allowing for unique 'acoustic signatures' that can be identified by surface receivers.
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Downhole tool activation confirmation
Acoustic telemetry systems in oil and gas drilling
Wellbore intervention monitoring
Why it matters
The bigger picture
In deep-well drilling, communication with tools miles underground is notoriously difficult. This patent provides a way to confirm tool operation using mechanical sound pulses, which can be more reliable than complex electronics in the extreme heat and pressure of a wellbore. It helps companies like Weatherford ensure their equipment is working without needing to pull the entire drill string out of the hole to check.
Filed
March 7, 2024
Granted
December 16, 2025
Market context
Who's building on this
Companies in this space
Weatherford Technology Holdings is the primary developer here. The technology is part of a broader industry effort by major oilfield service companies like Schlumberger and Halliburton to improve data transmission in harsh downhole environments where traditional electronics often fail.
Market impact
This patent strengthens the portfolio of specialized mechanical telemetry tools. It provides a reliable, low-power alternative to electronic systems, potentially reducing the frequency of 'tripping' (pulling the drill pipe out), which is one of the most expensive and time-consuming tasks in well construction.
Claim 1 — Plain English
What this patent covers
This device acts like an underwater bell for oil wells. It uses the pressure difference between the inside of a pipe and the surrounding wellbore to push a piston against a striking surface. By carefully changing the size, shape, and spacing of outlet ports in the housing, the device can tune the acoustic vibration to have specific frequencies or patterns. This allows operators to send distinct signals through the drill string to a receiver at the surface, confirming that a tool deep underground has successfully performed its task.
The clever bit
By treating the outlet ports as a tuning mechanism, the inventors turned a simple mechanical impact into a programmable signal generator, allowing for unique 'acoustic signatures' that can be identified by surface receivers.
What it does not cover
- Does not cover electronic or battery-powered acoustic signal generators.
- Does not cover systems that rely on mud-pulse telemetry (pressure waves in drilling fluid) rather than mechanical vibration.
- Does not cover wireless signals transmitted through the rock formation itself.
Patent timeline
Application submitted to the patent office
Application published, typically 18 months after filing
Patent officially issued
PatentBrief Score
Impact Score
Early stage
Citation count
0/40
No citations yet
Claim breadth
18/20
Very broad protection
Recency
20/20
Granted within 5 years
Assignee scale
0/20
Independent or smaller assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$20K – $66K
Midpoint $41K · 17.7 yr remaining · industry ×0.7
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
The original legal language
Original claims
27 claims as filed with the patent office.
Concepts involved
Citations
Patent lineage
Cite this patent
Symms, J. V., & Goodman, B. C. (2025). How Oil Wells Send Acoustic Signals Using Mechanical Hammers (U.S. Patent No. 12,497,890). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/12497890/spacex-avionics-philosophy
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
Frequently Asked Questions
What does How Oil Wells Send Acoustic Signals Using Mechanical Hammers cover?
A device that uses pressure differences to slam a piston against a metal surface, creating a specific sound vibration that acts as a signal for deep-well operations.
Who owns patent US 12497890?
Weatherford Technology Holdings LLC owns this patent, granted in 2025.
When does this patent expire?
This patent is expected to expire on December 16, 2045, when the invention enters the public domain.
What problem does this patent solve?
In deep-well drilling, communication with tools miles underground is notoriously difficult. This patent provides a way to confirm tool operation using mechanical sound pulses, which can be more reliable than complex electronics in the extreme heat and pressure of a wellbore. It helps companies like Weatherford ensure their equipment is working without needing to pull the entire drill string out of the hole to check.
What does this patent NOT cover?
Does not cover electronic or battery-powered acoustic signal generators.
Patent monitoring