Dual string assembly for gas wells

Details Dual string assembly for gas wells Dual string assembly for gas wells

E - Fixed Constructions

21

B

E21B 33/06 (2006.01) E21B 33/047 (2006.01)

Patent

CA 2172097

A dual completion for gas wells includes a dual base with a primary hanger incorporated in the base. Primary and secondary coiled tubing strings extend through the base at a downwardly converging angle of 2° or less. The dual base is mounted on an annular blowout preventer. At the top of the annular blowout preventer is a tubing centralizer that aligns the two tubing strings parallel to one another. The blowout preventer has two side ports below the bladder allowing the operator to produce gas from the annulus, to flare gas to atmosphere or to pump in kill fluid in the event of an emergency. The alignment of the tubing strings allows production recorders to be run in either string.

Cette invention concerne une tête de complétion double qui comprend une base double à collier de suspension primaire intégré à la base. Les tubes d'intervention enroulés primaire et secondaire traversent la base selon un angle convergent d'au plus 2 degrés. La base double est montée sur un obturateur anti-éruption annulaire. Au sommet de celui-ci se trouve un centreur de tubage qui a pour fonction de maintenir le parallélisme des colonnes dans le puits. L'obturateur anti-éruption comporte deux lumières latérales sous la garniture gonflable pour autoriser l'extraction ou le brûlage de gaz, ainsi que l'injection d'un fluide d'extinction en cas d'urgence. L'alignement des colonnes de production permet d'utiliser les enregistreurs de production sur les deux indifféremment.

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