Apparatus and method for cleaning out sand from an...

E - Fixed Constructions – 21 – B

Patent

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E21B 37/00 (2006.01) E21B 21/02 (2006.01)

Patent

CA 2630020

An apparatus and method is provided for cleaning out sand from underbalanced gas wells. The apparatus can include a valve subassembly equipped with an emergency shut in device to remotely control the actuation of the valve via an air or hydraulic control line. Operatively coupled to the inlet of the valve subassembly is a swivel subassembly that enables the coupling to a tubing string. A lifting assembly attaches the valve subassembly to an elevator of a well service rig. A hardened elbow coupled to an outlet of the valve subassembly directs the gas/sand mixture being removed from the well through a hose to a collection pit. The use of the apparatus in a sand cleanout operation allows joints of pipe to be tripped into and out of the tubing string all the while keeping the emergency shutdown device actuator connected and operational.

Appareil et méthode de nettoyage du sable des puits de gaz en sous-pression. L'appareil peut comprendre un sous-ensemble robinet équipé d'un dispositif de fermeture d'urgence de puits pour commander à distance l'actionnement du robinet par une commande hydraulique ou pneumatique. Fonctionnellement couplé à l'orifice d'entrée du sous-ensemble robinet, un sous-ensemble tête d'injection permet le raccord à une colonne de production. Un ensemble de levage fixe le sous-ensemble robinet à l'élévateur de la plateforme d'entretien du puits. Un coude durci couplé à un orifice de sortie du sous-ensemble robinet achemine le mélange de gaz et de sable devant être retiré du puits au moyen d'un tuyau et versé dans un puisard. L'utilisation de l'appareil pour une opération de nettoyage de sable permet la manoeuvre de joints de tuyau vers l'intérieur et l'extérieur de la colonne de production tout en maintenant l'actionneur du dispositif de fermeture d'urgence de puits branché et opérationnel.

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