US3583677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-mechanical transducer for secondary oil recovery
Assignee: Electro-Sonic Oil Tools Inc
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Filing: 1969-08-28
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Granted: 1971-06-08
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Expires: 1989-08-28
Abstract
Abstract An electromechanical transducer for use in secondary recovery in oil wells which, in effect, produces a dipole-type radiation field of increased magnitude which extends along a single axis perpendicular to the axis of the oil well. This allows the surrounding casing to vibrate in a displacement mode rather than in a circumferential expansion mode, to enable energy coupling to the surrounding oil-producing formation. In specific form of the invention, the transducer includes two resonant beams forced to vibrate at an audio or sonic frequency by piezoelectric element stacks driven by an external electrical power source and transferring energy through additive shear waves to an external body.
Inventors
- 👤 Edward H Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:01
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611; E; E21; E21B; E21B28/00; E21B43/00; E21B43/003; G; G01; G01V; G01V1/00; G01V1/40; G01V1/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
An electromechanical transducer as in claim 1 where said cavities are sealed to exclude said fluid medium.
Claim 2
Dependent Claim
23 words
An electromechanical transducer as in claim 1 where each of said vibratory means includes a stack of piezoelectric elements having a bidirectional polarization.
Claim 3
Dependent Claim
24 words
An electromechanical transducer as in claim 1 where said means for placing said vibratory means in synchronous vibration includes a source of alternating voltage.
Claim 4
Dependent Claim
46 words
An electromechanical transducer as in claim 1 where the mechanical impedance of said transducer is km. where k is the effective spring compliance of the transducer and m the mass of the transducer and where k is primarily determined by the bending mode of said transducer.
Claim 5
Dependent Claim
118 words
An electromechanical transducer adapted to be disposed in a well casing to couple energy to the fluid and formation surrounding said casing comprising, a body elongated along a predetermined axis having first and second coaxial cavities separated by web means integral to said body, first and second vibrating means respectively cantilevered on said web means, each of said vibrating means including vibratory elements and a reaction mass, said vibrating elements in combination with said reaction mass forming cantilevered beams having an axis substantially coincident with said predetermined axis, means for placing said vibratory elements in synchronous vibration whereby vibrating energy is coupled to said body through additive shear waves produced by said beams vibrating in a free-free mode.
Claim 6
Dependent Claim
24 words
An electromechanical transducer as in claim 6 where said web means includes a relatively thin flange portion coupling said web means to said body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |