Patent ID: 8677814

Claim:
A device for extracting at least one gas contained in drilling mud, comprising: an enclosure; means for conveying the drilling mud into the enclosure; means for removing the drilling mud from the enclosure; means for admitting a carrier gas into the enclosure comprising a carrier gas admission pipe which connects a source of carrier gas to the enclosure, the admission pipe being equipped with a regulating device for regulating the flow of carrier gas circulating in the pipe; and a gas extraction pipe opening into the enclosure via a gas extraction opening; wherein the means for admitting the carrier gas further comprise: a sensor for measuring an instantaneous pressure which is substantially identical to the pressure inside the enclosure, the sensor being arranged at a point located downstream of the regulating device; and means for controlling the regulating device which are connected to the sensor in order to control the flow of carrier gas injected into the enclosure via the regulating device at any moment in time as a function of the difference between the pressure measured by the sensor and a specified gas extraction pressure.