tubing

CONT: Dans la plupart des cas, les sondages pétroliers comportent [...] une colonne de surface [...]; une colonne technique [...] [et] une colonne de production, si le puits est «positif», qui permet d'isoler la zone pétrolifère et à l'intérieur de laquelle sera descendu un tube d'écoulement du pétrole (tubing).
CONT: En surface, le casing [de production] et le tubing sont reliés aux tuyauteries qui doivent évacuer le pétrole produit par le sondage; on utilise à cette fin une tête de puits ou «arbre de Noël».

CONT: When oil is found, the drilling stops. The bit and string are pulled out of the hole, and a pipe called a production casing is put into the hole and cemented in place. Another pipe, called tubing, is put inside the casing. The oil will be pumped through the tubing, which is connected to valves on a Christmas tree.
OBS: Production tubing is steel pipe smaller in diameter than the production casing. It is lowered into the casing and held in place by packers which also isolate the producing layers of rocks.