Flow reversing apparatus and methods of use

Details Flow reversing apparatus and methods of use Flow reversing apparatus and methods of use

E - Fixed Constructions

21

B

E21B 34/06 (2006.01)

Patent

CA 2610563

Apparatus and methods for selectively and safely reversing flow in coiled tubing used for wellbore cleanouts are disclosed. One apparatus includes a section (2) of coiled tubing having a main flow channel, at least two flow- preventing valves (6) in the section of coiled tubing, each adapted to close the main flow channel upon attempted flow reversal; and at least one actuator (54) adapted to deter closing of the flow-preventing valves. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims .

Cet appareil et ces procédés d'inversion sélective et sûre d'un écoulement dans une conduite enroulée sont utilisés pour le nettoyage d'un puits de forage. L'appareil comprend une section de conduite enroulée ayant un canal principal d'écoulement, au moins deux soupapes de prévention d'écoulement dans cette section, chacune servant à fermer le canal principal d'écoulement lors d'une tentative d'inversion d'écoulement; et au moins un actionneur conçu pour éviter la fermeture des soupapes de prévention d'écoulement.

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