Pipe centralizer and method of attachment

Details Pipe centralizer and method of attachment Pipe centralizer and method of attachment

E - Fixed Constructions

21

B

E21B 17/10 (2006.01)

Patent

CA 2450749

A crimpable centralizer has been invented for installation on pipe, such as would be useful in well bore drilling and casing operations. The present invention provides a centralizer having a cylindrical body which when coaxially placed over a pipe and substantially radially inwardly displaced at a plurality of points (i.e. crimped) about the circumference of a section of the cylindrical body, attaches to the pipe to create a connection having structurally significant axial and torque load transfer capacity. When crimped according to the methods of the present invention, the load transfer capacity of the connection between the centralizer and the pipe can be arranged to substantially prevent significant relative movement of the centralizer on the pipe under loads that may be encountered when using one or more of the pipes as components of a tubular string used for drilling or completing well bores.

L'invention concerne un centreur sertissable destiné à être monté sur un tube de forage, à utiliser dans des opérations de forage et de tubage de puits. Le centreur selon l'invention comporte un corps cylindrique qui, lorsqu'il est placé coaxialement sur un tube et déplacé sensiblement radialement vers l'intérieur, en une pluralité de points (par exemple serti) sur la circonférence d'une partie du corps cylindrique, est fixé audit tube, la liaison ainsi créée offrant une capacité structuralement importante de transfert de charge axiale et de couple. Lorsque ledit centreur est serti selon les procédés présentés, la capacité de transfert de charge de la liaison établie entre lui et le tube peut être réglée de façon qu'elle empêche sensiblement un déplacement relatif important du centreur sur le tube, en présence de charges pouvant se produire lorsque l'on utilise au moins un tube en tant que composant d'un train de forage tubulaire utilisé pour forer ou terminer des puits.

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