Nippon Steel has been granted a patent for a threaded connection for steel pipes. The connection includes a pin and a box, with both having annular shoulder surfaces, sealing surfaces, and thread ...

A compression test conducted on a 7 5/8-in., 39-lb/ft P-110 casing joint buckled the pipe body rather than the connection. The test, conducted by Grant Prideco for Shell Offshore Inc.'s Brutus oil and ...

Daido Steel has been granted a patent for a threaded connection for steel pipes. The connection includes a pin and a box, with both having annular shoulder surfaces, sealing surfaces, and thread parts ...