Patent ID: 7828060
Filing Date: 2010-11-09
Classification: E21B

Abstract:
1. A method of checking for restrictions in a string of tubing located in a hole or bore and comprising a plurality of tubing sections, in preparation for use of the tubing sections in a subsequent operation, the method comprising: identifying the diameter of a ball, dart, plug or other device to be passed through the tubing in a subsequent operation; providing a profile in the tubing string; providing a drift member adapted to engage with said profile; selecting a drift member diameter at least as great as the diameter of said ball, dart, plug or other device; passing the drift member through the tubing string to drift the tubing sections; determining whether the drift member has engaged with said profile, and pulling the tubing string out of hole and separating the tubing sections, further comprising reconnecting drifted tubing sections, running the resulting tubing string back into the hole, and performing the subsequent operation, wherein the subsequent operation includes running said ball, dart or plug through the reconnected tubing sections.