Along tool string deployed sensors
A sensor system includes interconnected and axially spaced apart sensor devices deployed along an outer surface of a downhole tool string. The sensor devices including a sensor disposed with a protective housing and control electronics located remote from the sensor devices and operationally connected to the sensors.
1. A sensor system, comprising:
sensor devices interconnected and spaced axially apart along the outside surface of a perforating gun string disposed in a wellbore, each of the sensor devices comprising:
a protective housing having shock mitigation packaging; and
a sensor connected to sensor electronics, each of which are disposed within the protective housing; and
master electronics located along the perforating gun string and remote from the sensor devices and operationally connected to the sensor devices.
2. The system of claim 1 , wherein the sensor electronics are disposed in a cavity of the protective housing.
3. The system of claim 1 , wherein the sensor devices are spaced axially apart about ten feet or less.
4. The system of claim 1 , wherein the sensor devices are spaced axially apart about one foot or less.
5. The system of claim 1 , wherein each of the sensor devices comprises a clamp connected with the protective housing to connect the sensor device to the perforating gun string.
6. The system of claim 1 , wherein the sensor devices are interconnected by a control line or wireless telemetry.
7. The system of claim 1 , wherein the master electronics communicate to a surface system via wireless telemetry.
8. A downhole sensor system, comprising:
a sensor device comprising local sensor electronics disposed in a protective housing, the sensor device disposed along the outside surface of a perforating gun string in a wellbore;
shock mitigation packaging within the protective housing;
sensors spaced axially apart and disposed within a protective tubing, the protective tubing extending along the outer surface of gun sections of the perforating gun string, the sensors connected to the local sensor electronics; and
master electronics located along perforating gun string and remote from the sensor device and operationally connected to the local sensor electronics.
9. The system of claim 8 , wherein the sensor device comprises an additional sensor disposed within the protective housing.
10. The system of claim 8 , wherein the sensor device is connected to the tool string by a clamp.
11. The system of claim 8 , wherein the sensors are spaced axially apart about ten feet or less.
12. A method, comprising:
housing wellbore sensors within a protective tubing having shock mitigation packaging;
deploying in a wellbore the protective tubing along an outside surface of a perforating gun string comprising a perforating pun having explosive charges, wherein the sensors within the protective tubing are spaced axially apart;
communicating sensor data to master electronics located in the wellbore along the perforating gun string and remote from the perforating gun; and
communicating commands and the sensor data between the master electronics and surface located electronics.
13. The method of claim 12 , wherein the sensors are connected to sensor electronics deployed along the perforating gun.