Device for extracting at least one gas contained in a...

Details Device for extracting at least one gas contained in a... Device for extracting at least one gas contained in a...

E - Fixed Constructions

21

B

E21B 21/06 (2006.01)

Patent

CA 2581242

The inventive device (53) comprises an enclosure (63), means (65) for supplying the drilling mud into the enclosure (63), and means (67) for discharging the drilling mud from the enclosure (63). The device also comprises means (69) for introducing a carrier gas into the enclosure (63) and a pipe (71), which serves to extract the gas discharging into the enclosure (63) and which is connected to suction means (109). The device (53) additionally comprises selective venting means (72) comprising a vent pipe (115) perforated over the extracting pipe (71) and means (117) for closing the vent pipe (115). These means (117) are designed for opening the vent pipe (115) when the pressure at at least one point (121) of the device is less than a predetermined set value. The invention is used for analyzing the gaseous content of muds from drilling oil wells.

Ce dispositif (53) comprend une enceinte (63), des moyens (65) d'amenée de la boue de forage dans l'enceinte (63), des moyens (67) d'évacuation de la boue de forage de l'enceinte (63). Il comprend en outre des moyens (69) d'introduction d'un gaz vecteur dans l'enceinte (63) et une conduite (71) d'extraction de gaz qui débouche dans l'enceinte (63), reliée à des moyens (109) d'aspiration. Le dispositif (53) comprend en outre des moyens (72) de mise à l'évent sélective qui comportent une conduite (115) d'évent, piquée sur la conduite d'extraction (71) et des moyens (117) d'obturation de la conduite d'évent (115). Ces moyens (117) sont adaptés pour ouvrir la conduite d'évent (115) lorsque la pression en au moins un point (121) du dispositif est inférieure à une valeur de consigne prédéterminée. Application à l'analyse du contenu gazeux des boues issues d'un forage de puits de pétrole.

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