Blocking robot for high-pressure oil wells

Details Blocking robot for high-pressure oil wells Blocking robot for high-pressure oil wells

E - Fixed Constructions

21

B

E21B 33/02 (2006.01)

Patent

CA 2103361

A robot for sealing and blocking pipes which are subject to very high pressure. The robot comprises a counter-pressure device below the main blocking portion for simultaneously acting on the inner wall, at depth in the pipe, by expansion caused by a single linear movement of a tapered shaft in a cylinder having therein a tapered bore; said shaft having a diameter which is 50 % greater than the difference between the inner taper diameters of the two ends of the cylinder, which cylinder has a slot running the full length thereof and is controlled by hydraulic jacks; a centre pipe allowing oil flow and normalising the upward pressure during the insertion process; and two pantographs for centering the system in the well in spite of the very high pressure. The high pressure in the well helps ensure blocking of the system.

2103361 9218746 PCTABS00160 L'invention concerne un robot pour la fermeture et le blocage des tuyaux soumis à de très fortes pressions, comportant des moyens d'oppositions à la pression situés au-dessous de la partie de blocage principale, et agissant simultanément sur la paroi intérieure, en profondeur dans le tuyau, par extension, obtenue par un seul mouvement linéaire d'un axe cônique dans un cylindre comportant à l'intérieur un fraisage cônique; l'axe ayant 50 % de plus de diamètre de la différence des diamètres intérieurs côniques des deux bouts du cylindre, comportant une fente sur toute sa longueur, commandé par des vérins hydrauliques; comportant un conduit central assurant l'afflux du pétrole, normalisant la pression ascendante durant le processus de son introduction; comportant aussi deux pantographes permettant le centrage du système dans le puits malgré les très fortes pressions; la forte pression du puits agit pour la fermeté du blocage du système.

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