Downhole flow stimulation in a natural gas well

Details Downhole flow stimulation in a natural gas well Downhole flow stimulation in a natural gas well

E - Fixed Constructions

21

B

E21B 43/12 (2006.01) E21B 36/00 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2246504

Fluid flow in a natural gas well is stimulated by means of a downhole multi-stage rotary compressor (10) which is driven by an electric motor (6). Preferably the compressor shaft (9) is equipped with gas journal bearings (12), the motor is a brushless permanent magnet motor which is capable of operating at a speed above 5000 RPM and which directly drives the compressor shaft (9), and the production tubing (1) is thermally insulated by evacuated the surrounding annular space.

On stimule l'écoulement descendant dans un puits de gaz naturel au moyen d'un compresseur de fond rotatif à plusieurs étages (10), actionné par un moteur électrique (6). De préférence, l'arbre (9) du compresseur est équipé de paliers de tourillon à gaz (12), le moteur est un moteur à aimant permanent sans balais qui est susceptible de fonctionner à une vitesse de 5000 tours/mn et qui entraîne directement l'arbre (9) du compresseur, et la colonne de production est thermiquement isolée par suppression de l'espace annulaire environnant.

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