Centralizer for centring drilling and casing pipes and...

Details Centralizer for centring drilling and casing pipes and... Centralizer for centring drilling and casing pipes and...

E - Fixed Constructions

21

B

E21B 17/10 (2006.01)

Patent

CA 2067061

ABSTRACT OF THE INVENTION CENTRALIZER FOR CENTRING DRILLING AND CASING PIPES AND CENTRALIZING ARRANGEMENTS INCLUDING SAID CENTRALIZER A centralizer comprises two spaced-apart support rings connected by spring bows. Each support ring is provided with an internal groove. In use the centralizer is slid onto a pipe provided with two spaced-apart external grooves. When the internal grooves on the support rings overly the external grooves on the pipe a flexible stop ring is inserted through a window in the support rings into a space defined by the internal groove and the external groove. The internal groove on the support ring extends axially longer than the stop ring by an amount such that the spring bows can be pressed flat against the periphery of the pipe. (Fig- 1)

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