Method and apparatus for analyzing casing wear and retrieval...

Details Method and apparatus for analyzing casing wear and retrieval... Method and apparatus for analyzing casing wear and retrieval...

E - Fixed Constructions

21

B

E21B 47/00 (2006.01) B01D 35/06 (2006.01) B03C 1/02 (2006.01) B03C 1/28 (2006.01) E21B 7/18 (2006.01) E21B 12/02 (2006.01) E21B 21/06 (2006.01) E21B 49/08 (2006.01) G01N 1/40 (2006.01) G01N 33/28 (2006.01)

Patent

CA 2443111

A method and apparatus for retrieving magnetic casing fragments from a well using a shrouded magnet are disclosed. Retrieving casing fragments allows the determination of weight loss from the casing to assist in analyzing the integrity of the casing, the condition of the casing and the amount of casing wear, or to determine whether more expensive analysis is required. The shrouded magnet (10) with flow vanes (22), a non-magnetic container (12) enclosing a source of magnetic field, recovers metal fragments by colecting them on the outside surface (13) of the container (12), which fragments are easily separated from the device by removing them from such outer surface after removal of the source of magnetic field from inside the container.

L'invention concerne un procédé et un appareil de récupération de fragments magnétiques de tubage dans un puits à l'aide d'un aimant pourvu d'un revêtement. La récupération de fragments de tubage permet de déterminer une perte de poids du tubage et d'analyser l'intégrité du tubage, l'état du tubage et la quantité d'usure du tubage, ou de déterminer si une analyse plus coûteuse est nécessaire. L'aimant (10) à revêtement pourvu d'ailettes (22) d'écoulement et d'un récipient non magnétique (12) comprenant une source de champ magnétique, récupère des fragments métalliques par ramassage sur la surface extérieure (13) du récipient (12), lesdits fragments étant facilement séparés du dispositif par retrait de ladite surface extérieure suite au retrait de la source de champ magnétique de l'intérieur du récipient.

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