Method of determination of the stuck point in drill pipes by...

E - Fixed Constructions – 21 – B

Patent

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E21B 47/09 (2006.01)

Patent

CA 2597829

The invention relates to the area of the mining industry, namely, to the area of drill hole survey, and can be used for determination of free or stuck parts of pipes in a drill hole. The implementation of this method is accompanied by registration of the parameter characterizing the condition of the pipe metal and by determination of the free point, based on changes in the value of the above- mentioned parameter. The value of a time-induced decay of the electromagnetic field generated by application of an electric current pulse to the pipe is used as the above- mentioned parameter.

Cette invention se rapporte au domaine de l'industrie minière, nommément au domaine de l'examen des forages, et elle peut servir à déterminer les parties libres ou bloquées des tiges dans un trou de forage. La mise en oeuvre de cette méthode est accompagnée de l'enregistrement du paramètre qui caractérise l'état du métal des tiges et de la détermination du point libre, en fonction des changements apportés à la valeur du paramètre susmentionné. La valeur d'un déclin temporel du champ électromagnétique produit par l'application d'une impulsion de courant à la tige est utilisée comme paramètre susmentionné.

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