G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/72 (2006.01) G01N 27/82 (2006.01) G01V 3/26 (2006.01)
Patent
CA 2369213
A casing joint locator device (66) and methods are described. The locator device (66) includes a giant magnetoresistive (GMR) sensor (70) that is capable of detecting joints (24) between sections (20, 22) of casing in a wellbore. The methods and devices described detect perturbations in the earth's magnetic field caused by air gaps (34) and discontinuities associated with a casing joint or with an external casing joint collar. As a result, they are capable of detecting flush and standard collared joints. The casing joint locator generates essentially no magnetic or electromagnetic field so that other downhole instrumentation is not affected by its presence.
L'invention concerne un dispositif de localisation de manchon de tubage ainsi que ses procédés d'utilisation. Le dispositif de localisation (66) comprend un capteur (70) magnétorésistif géant (GMR) capable de détecter des manchons (24) entre des sections (20, 22) de tubage dans un puits de forage. Les procédés et dispositifs décrits servent à détecter des perturbations dans le champ magnétique terrestre causées par des trous d'air (34) ainsi que des discontinuités associées à un manchon de tubage ou à un collier externe de manchon de tubage. Ils permettent ainsi de détecter des joints lisses et des joints bagués normalisés. Le dispositif de localisation de manchon de tubage ne génère aucun champ magnétique ou électromagnétique. Les autres instruments de fond de puits ne sont donc pas perturbés par sa présence.
Halliburton Energy Services Inc.
Ridout & Maybee Llp
LandOfFree
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