E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 29/04 (2006.01)
Patent
CA 2367744
A pipe string in an oil well has a cable (2) slidingly attached along it. It may be necessary to break the pipe string. Apparatus is provided for controlling the position of a fracture in the cable, as it is desirable to break the cable at about the same point. The apparatus comprises a pocket (1) attached to the cable and having a passage through which the cable passes, and upper and lower nipples (5 and 6) attached to the cable in the pocket. The lower face (5') of the nipple (5) is skewed relative to the lower internal face (3') of the pocket and the facing faces (5", 6') of the two nipples are skewed relative to each other, so bending and kinking the cable when tension is applied. The cable therefore breaks at the bend or kink. The pipe string includes a plurality of such apparatuses located at spaced points along its length.
L'invention concerne une colonne de tubes dans un puits de pétrole, qui comporte un câble (2) fixé de manière coulissante le long de la colonne. Il peut être nécessaire de rompre la colonne de tubes. On décrit un appareil qui permet de contrôler la position d'une fracture dans le câble et, si besoin est, de rompre le câble au niveau de ce point. L'appareil comporte une poche (1) fixée au câble et munie d'un passage par lequel passe le câble, et des mamelons supérieur et inférieur (5, 6) fixés au câble dans la poche. La face inférieure (5') du mamelon (5) est oblique relativement à la face intérieure inférieure (3') de la poche, et les faces opposées (5", 6') des deux mamelons sont obliques l'une relativement à l'autre, de manière à plier et courber le câble lorsqu'une tension est y exercée. Le câble rompt par conséquent au niveau de l'incurvation ou courbure. Plusieurs de ces appareils sont disposés à des emplacements espacés, le long de la colonne de tubes.
Dybevik Arthur H.
Stokkeland Kaj
Vold Gisle
Marks & Clerk
Subsurface Technology As
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