System and method for wireless communication in a producing well system
The invention relates to a system and method for wireless communication in a producing well system associated with oil and gas production, comprising at least one well bore. The system comprises at least two communication units, the communication units each comprising a transmitter and/or receiver for sending and/or receiving data, at least one, control unit for controlling the communication between the communication units.
1. System for wireless communication in a producing well system associated with oil and gas production, comprising:
at least one well bore,
at least two communication units, the communication units each comprising a transmitter and receiver for sending and receiving data, the transmitter comprising a static pulse generation device adapted for generating static pressure fluctuations in the well's production fluid, and
at least one control unit for controlling the communication between the communication units, wherein the transmitter is configured for monitoring and controlling the generated static pressure fluctuations according to the producing well system's time constant in order to provide static pressure fluctuation characteristics that match the producing well system, wherein the time constant refers to the time delay between transmitting and receiving a pulse between the communication units.
2. System according to claim 1 , wherein each of the communication units comprise a fail-safe mechanism.
3. System according to claim 2 , wherein the static pulse generation device is a choking device that modulates the flow of the production fluid, and that the fail-safe mechanism is configured to return the choking device to a passive mode in case of a system failure, whereby the pulse generation device returns from whatever state it is at the occurrence of the system failure to a position where a minimum choking effect is imposed on the flow of the well's production fluid.
4. System according to claim 1 , wherein parameters of the static pressure fluctuations are changed in an adaptive process.
5. System according to claim 1 , wherein the communication units and/or the control unit comprise data conversion means to convert data for transmission.
6. System according to claim 1 , wherein the transmitter and receiver are adapted for sending and receiving data by means of the production fluid.
7. System according to claim 1 , wherein the transmitter and receiver are adapted for transmitting and receiving signals by means of fluctuations in the production fluid.
8. System according to claim 1 , wherein the communication units are physically connected to a process pipe.
9. System according to claim 1 , wherein that the communication units have equal access to the data transmitted in the production fluid.
10. System according to claim 1 , wherein the control unit is integrated in a communication unit.
11. System according to claim 1 , wherein at least one of the communication units is connected to or integrated in an ordinary well device/instrument.
12. System according to claim 1 , wherein the regular stream/flow of the production fluid constitutes the carrier for the data to be transmitted.
13. System according to claim 1 , wherein the receivers comprise a static pulse generation device adapted for generating static pressure fluctuations in the production fluid.
14. System according to claim 1 , wherein it further comprises at least one sensor located in the well for providing sensor data for transmission, and a receiver located at the surface.
15. Method for communicating in a producing well system comprising at least one well bore, the method comprises:
providing at least two communication units, the communication units each comprising a transmitter and receiver for sending and receiving data, and at least one control unit for controlling the communication between the communication units,
sending data from one communication unit to another by means of generating static pressure fluctuations in the well's production fluid, and
monitoring and controlling the generated static pressure fluctuations according to the producing well system's time constant in order to provide static pressure fluctuation characteristics that match the producing well system, wherein the time constant refers to the time delay between transmitting and receiving a pulse between the communication units.
16. Method according to claim 15 , wherein parameters of the static pressure fluctuations are related to the fluid's behaviour.
17. Method according to claim 15 , wherein parameters of the static pressure fluctuations are changed in an adaptive process.
18. Method according to claim 15 , wherein the communication units and/or the control unit comprise data conversion means to convert data for transmission.
19. Method according to claim 15 , wherein data are converted in the communication units and/or the control unit for transmission.
20. Method according to claim 15 , wherein the data are sent and received via the production fluid.
21. Method according to claim 15 , wherein the data is sent and received by means of fluctuations in the production fluid.
22. Method according to claim 21 , wherein the fluctuations in the production fluid are static pressure fluctuations.
23. Method according to claim 15 , wherein the communication units have equal access to the data transmitted in the production fluid.
24. Method according to claim 15 , wherein the regular stream/flow of the production fluid constitutes the carrier for the data to be transmitted.
25. Method according to claim 15 , wherein static pressure fluctuations are generated in the production fluid by means of a static pulse generation device.
26. Method according to claim 15 , wherein it transmits sensor data provided from a sensor in the well to a receiver located at the surface.