US3697940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signalling system for bore logging
Assignee: Individual
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Filing: 1968-08-23
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Granted: 1972-10-10
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Expires: 1988-08-23
Abstract
Abstract A borehole telemetering apparatus comprises a protective casing coaxially mounted to the drill pipe. The casing includes a magnetostrictive or electrostrictive acoustic transducer which is in acoustic contact with the drill pipe, a silicon controlled rectifier and power supply for controlling the activation of the transducer. The transducer is coupled to the drill pipe preferably by means of an acoustic transformer and the lengths of individual drill pipes are adjusted to the transducer frequency.
Inventors
- 👤 Bohdan Jiri Berka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:43
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12; E21B47/14; E21B47/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
234 words
A signalling device for bore logging including a sonic transmitter unit attached to a lower section of the drill string disposed in a borehole, and a sonic receiver unit disposed on the earth''s surface and secured to an upper section of the drill string, said sonic transmitter unit comprising at least an electroacoustic transducer having a body mechanically deformable by the effects of electricity and capable of vibration, an acoustic transformer having an upwardly converging conical configuration, said transformer being of a length substantially equal to the half of the wave length of said vibrations, the upper base of said transformer being integral with said upper section of said drill string, said body being acoustically connected to the lower base of said accoustic transformer to transmit vibrations to said receiver unit, electric power pulse generating means electrically connected to said transducer for generating damped vibrations in said transducer, power supply means for feeding said power pulse generating means, switch means connected between said power pulse generating means and said power supply means, and a survey instrument coupled with said switch means for activating said transducer as a function of a predetermined condition of said borehole, said sonic receiver unit comprising an electroacoustic pick-up element, filter means coupled to said pick-up for separating said damped vibrations from accidental noise, amplifier means coupled to said filter means, and indicating means electrically connected to said amplifier means.
Claim 2
Dependent Claim
234 words
A signalling device for bore logging including a sonic transmitter unit attached to a lower section of the drill string disposed in a borehole, and a sonic receiver unit disposed on the earth''s surface and secured to an upper section of the drill string, said sonic transmitter unit comprising at least an electroacoustic transducer having a body mechanically deformable by the effects of electricity and capable of vibration, an acoustic transformer having an upwardly converging conical configuration, said transformer being of a length substantially equal to the half of the wave length of said vibrations, the upper base of said transformer being integral with said upper section of said drill string, said body being acoustically connected to the lower base of said accoustic transformer to transmit vibrations to said receiver unit, electric power pulse generating means electrically connected to said transducer for generating damped vibrations in said transducer, power supply means for feeding said power pulse generating means, switch means connected between said power pulse generating means and said power supply means, and a survey instrument coupled with said switch means for activating said transducer as a function of a predetermined condition of said borehole, said sonic receiver unit comprising an electroacoustic pick-up element, filter means coupled to said pick-up for separating said damped vibrations from accidental noise, amplifier means coupled to said filter means, and indicating means electrically connected to said amplifier means.
Claim 3
Dependent Claim
27 words
The signalling device according to claim 1 wherein said survey instrument is a radiation detector adapted for actuating said switch means when detecting radiation in said borehole.
Claim 4
Dependent Claim
219 words
A sonic transmitter unit for a signalling device for bore logging comprising a drill section, a hermetically sealed casing concentrically surrounding said drill section, an acoustic transformer having an upwardly converging conical configuration, said transformer being integral with said drill section, said casing being secured to said acoustic transformer, said casing including an electrical power supply with two output terminals; a power pulse generator comprising a capacitor connected to one power supply output terminal via a resistor, a semiconductor switching device having a switching control circuit actuated by said switch means; an electroacoustic transducer having two electrical input terminals,, said transducer being terminated by an upper vibrating surface acoustically connected with said acoustic transformer, one of said transducer terminals being connected to said capacitor and the second transducer terminal being connected to the second power supply output terminal to charge said capacitor via said resistor, whereby said semiconductor switching device being connected for abruptly discharging said capacitor through said transducer; and a pendulum inclinometer the pendulum of which forms one contact of said switch means,, the second contact of said switch means being adjustably supported in the path of said pendulum to provide a connection when the angular position of the pendulum resulting from the inclination of the borehole corresponds to a preset angular position of said second contact.
Claim 5
Dependent Claim
219 words
A sonic transmitter unit for a signalling device for bore logging comprising a drill section, a hermetically sealed casing concentrically surrounding said drill section, an acoustic transformer having an upwardly converging conical configuration, said transformer being integral with said drill section, said casing being secured to said acoustic transformer, said casing including an electrical power supply with two output terminals; a power pulse generator comprising a capacitor connected to one power supply output terminal via a resistor, a semiconductor switching device having a switching control circuit actuated by said switch means; an electroacoustic transducer having two electrical input terminals,, said transducer being terminated by an upper vibrating surface acoustically connected with said acoustic transformer, one of said transducer terminals being connected to said capacitor and the second transducer terminal being connected to the second power supply output terminal to charge said capacitor via said resistor, whereby said semiconductor switching device being connected for abruptly discharging said capacitor through said transducer; and a pendulum inclinometer the pendulum of which forms one contact of said switch means,, the second contact of said switch means being adjustably supported in the path of said pendulum to provide a connection when the angular position of the pendulum resulting from the inclination of the borehole corresponds to a preset angular position of said second contact.
Claim 6
Dependent Claim
30 words
The sonic transmitter for a signalling device according to claim 3 wherein said semiconductOr switching device is a silicon controlled rectifier the gate of which forms said switching control circuit.
Claim 7
Dependent Claim
33 words
The sonic transmitter for a signalling device according to claim 4 wherein said switching device control circuit further comprises a trigger circuit for producing a train of trigger pulses of a definite frequency.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |