Device comprising multiple detectors for detecting a flow of gas extracted from a drilling fluid

1. A device for analyzing at least a flow of gas extracted from a drilling fluid used for drilling a wellbore, comprising:

a chassis having at least:

a power supply system

a fluid distribution and regulation system,

a control module,

at least a first and second analysis module of different types, each comprising at least a detector for measuring at least a parameter representative of a content of at least a gas compound in the flow of gas,

wherein the chassis comprises a core connector having power, communication and fluid outputs, each of the analysis modules having a module connector complementary to the core connector, wherein the complementary core and module connectors are configured to form a removable connection, and

wherein the device is configured to obtain a measurement from the detector of the first analysis module when the first analysis module is connected to the chassis via the core connector and to obtain a measurement from the detector of the second analysis module when the second analysis module is connected to the chassis via the core connector,

wherein the control module of the chassis is configured to control the power delivered to the core connector and/or the flow of gas delivered to the core connector in function of the type of the analysis module connected to the core connector.

2. The device according to claim 1 , wherein the first analysis module is configured to measure a parameter representative of content of at least a first gas, while the second analysis module is configured to measure a parameter representative of content of at least a second gas, wherein the first and second gas are distinct.

3. The device according to claim 2 , wherein the content of at least a first or second gas comprise at least one of the following:

total content of gas contained in the drilling fluid

content of a gas compound contained in the drilling fluid.

4. The device of claim 3 , wherein the gas compound is one of an alkane having less than 12 carbon atoms, an alkene, an hydrogen sulfur or helium.

5. The device according to claim 1 , wherein the detector of the first analysis module and/or second analysis module is one of the following:

Flame Ionization Detector,

Thermal Conductivity Detector,

Mass Spectrometer,

Laser Photoacoustic Spectrometer,

Fourier Transform Infrared Spectrometer

PhotoIonization Detector (PID),

Electron Capture Detector (ECD),

Pulse discharge detector (PDD).

6. The device according to claim 1 , wherein at least one of the first or second analysis module comprises a gas separation module upstream from the detector for separating the gas compounds contained in the flow of gas.

7. The device according to claim 1 , comprising at least a pump for delivering the flow of gas to the detector, in fluid communication with the core connector, wherein the control module of the chassis is configured to control the flow delivered by the pump in function of the type of the analysis module connected to the core connector.

8. The device according to claim 1 , having at least a pump module comprising the pump, wherein the pump module is connected to the chassis via at least one removable power, communication and fluid connection.

9. The device according to claim 8 , wherein the chassis comprises at least two core connectors configured so that one analysis module is connected to the first core connector while another analysis module is connected to the second core connector, wherein the device comprises at least two pump modules, wherein the fluid distribution and regulation system of the chassis is configured so that:

a first pump module is in fluid communication the first core connector and the corresponding analysis module,

a second pump module is in fluid communication with the second core connector and the corresponding analysis module.

10. The device according to claim 1 , wherein the chassis comprises at least two core connectors configured so that one analysis module is connected to the first core connector while another analysis module is connected to the second core connector.

11. The device according to claim 1 , wherein the chassis comprises an enclosure for enclosing the power supply system, the fluid distribution and regulation system, the control module, the core connector, an analysis module connected to each of the connector.

12. The device according to claim 11 , wherein the enclosure comprises a core compartment containing the power supply system, the fluid distribution and regulation system, the control module and an analysis compartment in which are disposed the at least one core connector, the at least one analysis compartment comprising and opening for introducing at least one of the first and second analysis module and connecting said module to the core connector, and a lid for closing the opening.

13. An installation for analyzing drilling fluid in communication with a wellbore comprising:

at least a pipe in fluid communication with the wellbore,

at least a sampler for recovering a sample of the fluid in the pipe,

at least an extractor for extracting gas contained in the sample of the drilling fluid,

a device according to claim 1 , in fluid communication with the or at least one of the extractors for analyzing the flow of extracted gas.

14. The installation according to claim 13 , comprising a transport line between the extractor and the device, wherein the transport line is no longer than 10 meters.

15. A method of analyzing a flow of gas with a device according to claim 1 , comprising:

measuring at least a parameter representative of a content of at least a first gas in the flow of gas with the device having the first analysis module connected to the core connector,

changing the configuration of the analysis device, comprising

disconnecting the first analysis module and

connecting the second analysis module to the core connector,

measuring at least a parameter representative of a content of at least a second gas in the flow of gas with the device having the second analysis module connected to the core connector.

16. The device according to claim 1 , wherein the chassis comprises an enclosure for enclosing at least a pump module.