Downhole gas compressor

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 41/00 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2551569

A method for producing gas from a well with low pressure involves running a bottom hole pressure test to graph a P-Q curve. The operator computes a frictional pressure drop due to friction of the gas flowing through the production tubing to the surface. A packer is set above perforations in the well. A screw pump is selected that has a capacity equal to the sum of the frictional pressure drop plus a desired wellhead pressure. The screw pump has a flow rate capacity determined from the P-Q curve. The operator may vary the frequency of a downhole motor to achieve the desired wellhead pressure,

Méthode de production d'un gaz à partir d'un puits à basse pression comprenant la réalisation d'un test de pression de fond de trou pour tracer une courbe PQ. L'opérateur calcule la perte de charge due au frottement du gaz circulant dans la colonne de production vers la surface. Une garniture d'étanchéité est placée au-dessus de perforations dans le puits. Une pompe à vis est choisie en fonction de sa capacité, qui doit être égale à la somme de la perte de charge due au frottement et de la pression de tête de puits désirée. La capacité de débit de la pompe à vis est déterminée en fonction la courbe PQ. L'opérateur peut faire varier la fréquence du moteur de fond pour atteindre la pression de tête de puits désirée.

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