Patent ID: 6905149
Filing Date: 2005-06-14
Classification: E21B,F16L

Abstract:
1. A pin and/or box thread connector having a fluid flow passage for use in relieving fluid pressure in a thread lubricant contained between threads in an engaged connection comprising a groove cut in a crest of a thread of said pin and/or said box said groove having dimensions configured to conduct said thread lubricant without reducing contact forces between the engaged threads in said connection, a thread tooth being formed by a load flank and a stab flank on either side of said crest, said load flank having a surface inclined to a central axis of said connector at a load flank angle, said stab flank having a surface inclined to a central axis of said connector at a stab flank angle, and said groove cut at a point on said crest at an intersection of said crest with a bisector of an angle defined by an intersection of a line lying within said load flank surface and a line lying within said stab flank surface, said stab flank surface including a line inclined to said central axis at an angle of 90 degrees.