Patent ID: 7350830
Filing Date: 2008-04-01
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 containing solid particles contained between threads of a pin and box in an engaged connection comprising a groove cut in a crest of a thread of said pin and/or said box, said groove following the helical path of said crest and having dimensions configured to conduct said thread lubricant without reducing contact forces between the engaged threads in said connection, said groove being cut in said crest approximately midway between thread flanks on either side of said crest, said groove providing an escape passage for said thread lubricant allowing flow of thread lubricant through said groove and having a diametrical cross sectional dimension whose smallest value is greater than the largest diametrical cross sectional dimension of the largest of said solid particles in said thread lubricant.