Diagnostic device for a seismic probe and associated method
AssigneeMichaël Delchambre
InventorsMichaël Delchambre, Sergei Labuda, Xavier Horsot
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Abstract
Disclosed is a diagnostic device for a seismic probe, the probe including, in an elongate tubular body, an electronic module, a capacitor bank and a spark gap adapted to generate a shock wave in a wellbore, the device including at least one sensor adapted to measure at least one parameter of the shock wave over time. The sensor is fixed to an inner surface of a wall of the tubular body, at a predetermined, non-zero distance from the spark gap in the direction of the electronic module. Also disclosed is a diagnostic method using the signals of the sensor.
Claims20
A diagnostic device for a seismic probe, said probe having:
- in an elongate tubular body, an electronic module,
- a capacitor bank and
- a spark gap adapted to generate a shock wave in a wellbore,
- said device comprising:
- at least one sensor adapted to measure at least one parameter of the shock wave over time, wherein:
- said sensor is fixed to an inner surface of a wall of the tubular body, at a predetermined, non-zero distance from the spark gap in the direction of the electronic module and adapted to measure the shock wave directly transmitted by the wall of the tubular body,
- said device further comprises a computer adapted to:
- record, during firing, a signal output by said sensor, process the recorded signal and compare it with at least one reference value, and based on the result of the comparison, output information representing the operating state of the probe, allowing a distinction to be made, after processing, between failed firing and successful firing.
A diagnostic method for a seismic probe, said probe comprising, in an elongate tubular body, an electronic module, a capacitor bank and a spark gap adapted to effect firing, generating a shock wave in a wellbore, wherein:
- a probe is used which is equipped with a sensor adapted to measure at least one parameter of the shock wave directly transmitted by the body of the probe over time, said sensor being fixed to an inner surface of a wall of the body at a predetermined, non-zero distance from the spark gap, a signal output by said sensor is recorded by a computer during firing, the recorded signal is processed and compared with at least one reference value, and based on the result of the comparison, the computer outputs information representing the operating state of the probe, allowing a distinction to be made, after processing, between failed firing and successful firing.
Dependencies are inferred from the claim text.