Expandable centralizer for downhole tubulars

E - Fixed Constructions – 21 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

E21B 43/10 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2489589

Centralizers made of a non-metallic material in a variety of styles are placed on the exterior of tubing or casing prior to expansion. The compliant nature of such material, when put into service in a centralizer for tubulars to be expanded prevents scoring the pipe on the way downhole. Scratches or scores of the pipe can be the location of stress fractures on expansion. Additionally, the resilient nature of the centralizers prevents them from adding significantly to the required expansion force and allows them to act as seals against channeling in the cemented annular space after expansion.

L'invention concerne des éléments de centrage fabriqués à partir d'un matériau non métallique, de styles divers, placés à l'extérieur d'une colonne ou d'un tubage avant expansion. La flexibilité desdits matériaux, lorsque ceux-ci sont mis en oeuvre dans un élément de centrage destiné à des éléments tubulaires soumis à une expansion, empêche qu'un tuyau ne soit rayé lors de son trajet descendant. Les rayures ou éraflures du tuyau peuvent donner lieu à des fractures de tension lors de l'expansion. En outre, l'élasticité desdits éléments de centrage leur permet de ne pas faire augmenter significativement la force d'expansion exigée, et d'avoir une fonction de joints contre le phénomène de cheminements préférentiels dans un espace annulaire cimenté après expansion.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Expandable centralizer for downhole tubulars does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Expandable centralizer for downhole tubulars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expandable centralizer for downhole tubulars will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1653627

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.