Downhole device with signal transmitter

1. A wellbore installation comprising:

a plurality of downhole devices installed in a petroleum well, the plurality of downhole devices including a first downhole device and a second downhole device;

a fiber optic cable in the petroleum well; and

a topside controller,

wherein each of the first and second downhole devices comprises:

a sensor,

a controller,

a power source, and

an acoustic speaker configured to output a sound signal to the fiber optic cable,

wherein the fiber optic cable functions as both a distributed temperature sensing (DTS) line and a distributed audio sensing (DAS) line,

wherein the topside controller is configured to receive the sound signal,

wherein the sound signal from each of the first and second downhole devices includes an identifiable signature,

wherein the top controller is configured to distinguish whether the sound signal is from the first downhole device or the second downhole device based on the identifiable signature, and

wherein the identifiable signature comprises a sound signal that is transmitted in a unique sequence, wherein the unique sequence of the sound signal of the first downhole device is different from the unique sequence of the sound signal of the second downhole device, wherein the unique sequence of the sound signal of the first downhole device comprises the sound signal being transmitted and maintained for a first amount of time, and the unique sequence of the sound signal of the second downhole device comprises the sound signal being transmitted and maintained for a second amount of time that is different from the first amount of time,

wherein the topside controller is configured to transmit a first pressure sequence to activate the first downhole device, wherein the first pressure sequence comprises an annulus pressure being reduced and maintained for a third amount of time;

wherein the first downhole device is configured to:

responsive to receiving the first pressure sequence, transitioning to a listening mode; and

transmitting, by the acoustic speaker, a predetermined sound signal to the topside controller, wherein the predetermined sound signal indicates that the first downhole device is in the listening mode.

2. The wellbore installation according to claim 1 , wherein each of the first and second downhole devices is configured to output a signal in response to an input to the sensor.

3. The wellbore installation according to claim 2 , wherein the input which the sensor is configured to receive is a pressure sequence.

4. The wellbore installation according to claim 1 , wherein the sensor is a pressure sensor.

5. The wellbore installation according to claim 1 , wherein at least one of the first and second downhole devices is at least one of a gas lift valve, a chemical injection valve, a sliding sleeve, an inflow device, and/or a circulating device.

6. The wellbore installation according to claim 1 , wherein the power source is a battery or an electric generator.

7. The wellbore installation according to claim 1 , wherein at least one of the first and second downhole devices is configured for installation in a production tubing.

8. A method of communicating a sound signal between a downhole device in a well and a topside controller, comprising the steps of:

providing the wellbore installation according to claim 1 ; and

operating the acoustic speaker of at least one of the first and second downhole devices to transmit the sound signal to the topside controller via the fiber optic cable arranged in the well.

9. The method according to claim 8 , further comprising:

transmitting an input signal from the topside controller to at least one of the first and second downhole devices.

10. The method according to claim 9 , wherein the input signal is a pressure sequence.

11. The method according to claim 8 , further comprising activating an action module in at least one of the first and second downhole devices.

12. The method according to claim 11 , further comprising transmitting an input signal from the topside controller to at least one of the first and second downhole devices, wherein the step of activating the action module comprises activating the action module in response to the input signal.

13. The method according to claim 11 , wherein the step of activating the action module comprises opening or closing a valve.