Patent ID: 6120067
Filing Date: 2000-09-19
Classification: E21B,F16L

Abstract:
A threaded connector for connecting large diameter tubes, the connector comprising:a first large diameter tube comprising a pin member having a pin nose with at least one external pin thread having a first wrap adjacent the pin nose of said pin member, the first large diameter tube having a first internal diameter adjacent said pin member, the at least one pin thread having a pin crest surface with a pin crest surface outer diameter along the first wrap, and a pin guiding surface forming the pin nose of the pin member; anda second large diameter tube comprising a box member having a box nose with at least one internal box thread having a first wrap adjacent the box nose of the box member, the second large diameter tube having a second internal diameter adjacent the box member, the at least one box thread having a box crest surface with a box crest diameter along the first wrap, a box guiding surface forming the box nose of the box member, the box guiding surface having an internal diameter mating to the pin crest surface outer diameter along the first wrap, the pin guiding surface having an external diameter mating to the box crest diameter along the first wrap;the pin nose ending with a metallic pin face surface;a pin nose receiving shoulder for the box member, the pin nose receiving shoulder having a first metallic recessed socket portion to mate with the pin face surface, the pin nose receiving shoulder having an internal ridge that forms the radially innermost portion of the pin nose receiving shoulder, the first metallic recessed socket portion having a deeper axial depth as compared to the internal ridge;the box nose face ending with a metallic box face surface;a box nose receiving shoulder for the pin member, the box nose receiving shoulder having a second metallic recessed socket portion to mate with the box face surface, the box nose receiving shoulder having an external ridge that forms the radially outermost portion of the box nose receiving shoulder, the second metallic recessed socket portion having a deeper axial depth as compared to the external ridge;the pin nose face and box nose face being axially spaced so as to simultaneously engage in metal-to-metal contact as the threaded connector is made up; anda pin member internal surface having a pin internal diameter substantially equal to the first internal diameter of the first large diameter tubular and the second internal diameter of the second large diameter tubular to provide a substantially constant internal diameter from the first large diameter tubular through the threaded connection and to the second large diameter tubular.