Patent ID: 6698534
Filing Date: 2004-03-02
Classification: E21B

Abstract:
A well-drilling apparatus comprising:a coiled tubing having a lowerable end; and a bottom hole assembly for drilling a well suspended from said coiled tubing at said lowerable end, said bottom hole assembly comprising: a length of nonmagnetic tubing, a motor and drilling bit driven by said motor below said length of nonmagnetic tubing, an orienter along said nonmagnetic tubing above said motor for orienting said motor and bit relative to said nonmagnetic tubing, a sensor package within said length of nonmagnetic tubing at an upper portion thereof, a drilling fluid flow tube extending through said length of nonmagnetic tubing from said coiled tubing to said motor and bit and alongside said sensor package, and a device for determining a relative position measurement between said motor and said nonmagnetic tubing.