Patent ID: 6276457
Filing Date: 2001-08-21
Classification: E21B

Abstract:
A method for emplacing a coil tubing string having a bottom end in a wellbore having a horizontal section, said section having toe and heel ends, comprising:providing at ground surface a primary tubing string and a coil tubing string, each having a bottom end, the primary tubing string having a larger diameter and being stronger and more rigid than the coil tubing string;securing the coil tubing string bottom end to the primary tubing string bottom end with first means secured to one string bottom end and second means secured to the other string bottom end, said first and second means being interlocked by a pair of solid members, one of which is meltable at downhole elevated temperature;running the two strings into the borehole with the coil tubing string secured to the primary tubing string and landing their bottom ends adjacent the toe end of the wellbore;melting the meltable member; andseparating the coil tubing string from the primary tubing string.