E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/09 (2006.01) E21B 44/00 (2006.01) E21B 47/022 (2006.01) E21B 47/024 (2006.01) G01V 1/42 (2006.01)
Patent
CA 2424134
The present invention relates to a method for estimating the position and trajectory of a drill during drilling of boreholes in rock. The method comprising the steps of determining the starting position of the drill bit and recording the received transient seismic waves generated by the drill on impact, and estimating the difference in arrival time between events. From these, the relative distances, between the positions of the drill bit at different events are calculated and from these the present position is calculated.
L'invention concerne un procédé d'estimation de la position et de la trajectoire d'un trépan pendant le forage de trous dans la roche. Ce procédé consiste à déterminer la position de départ du trépan et à enregistrer les ondes sismiques transitoires reçues générées par l'outil de forage sur impact, puis à évaluer la différence de temps d'arrivée entre événements. Sur la base de ces résultats, on calcule les distances relatives entre les positions du trépan à différents événements et ensuite la position actuelle.
Hjorth Jan
Litzen Bjorn
Guideline Ab
Sim & Mcburney
LandOfFree
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