Patent ID: 6712402
Filing Date: 2004-03-30
Classification: F16L

Abstract:
An oilfield tubular connection including a threaded pin end on one tubular and a box end with mating threads on another tubular, the pin end having a nominal inside diameter smaller than the box end nominal inside diameter, the connection further comprising:the box end having a first torque shoulder formed at the axial end of the box end lying substantially in a plane perpendicular to a central axis of the oilfield tubular connection for engaging a mating surface integrally formed on the pin end, the first torque shoulder being spaced radially outward from the mating threads on the pin end and the box end; the pin end having a pin end surface lying substantially in a plane perpendicular to the central axis of the connection; and a box sleeve selectively securable to the box end, the box sleeve having a sleeve end surface for matingly engaging the pin end surface to form a second torque shoulder, said box sleeve being wholly received within said connection when said pin and said box end are mated.