Patent ID: 6817633
Filing Date: 2004-11-16
Classification: E21B,F16L

Abstract:
A threaded connection for releasably coupling tubular members with each other, comprising:a coupling having a first box end and a second box end with a longitudinal bore extending through the coupling from the first box end to the second box end; a first internal thread profile formed within the first box end of the coupling; a second internal thread profile formed within the second box end of the coupling; each tubular member having a respective first pin end and a respective second pin end; a longitudinal bore extending through each tubular member from the respective first end to the respective second end; a first external thread profile formed on the first pin end and a second external thread profile formed on the second pin end; the first external thread profile having a pitch diameter larger than a pitch diameter of the second external thread profile; and the pitch diameter of the first external thread profile approximately 0.006 inches larger than the pitch diameter of the second external thread profile.