Mechanical connector utilizing dog-clutch teeth to transfer torque

A mechanical connector provided with threads on substantially matching frustoconical surfaces of a box and a pin, said substantially matching frustoconical surfaces of said box and said pin extending essentially between two sets of nipple seals, whereas one said set of said nipple seals is located near an end of said box and another said set of said nipple seals is located near an end of said pin and whereas each said set of said nipple seals incorporates axially engaging, substantially cylindrical surfaces with an outside surface and an inside surface of a male substantially cylindrical segment interacting radially through a mechanism of a hoop stress with substantially matching surfaces of a substantially cylindrical cavity;

• whereas said threads on said substantially matching essentially frustoconical surfaces of said box and said pin include at least one of:
• an axisymmetric thread,
• a left-handed thread,
• a right-handed thread;
• whereas said mechanical connector is utilized to connect segments of pipes or tubes transporting fluids;
• whereas an axis of said box and an axis of said pin coincide with an axis of said mechanical connector;
• and wherein said mechanical connector includes a one or more set of dog-clutch teeth designed to transfer high torsional loads structurally between said pin and said box, whereas a design order of magnitude of said high torsional loads is of an order of magnitude of design bending loads of said mechanical connector;
• whereas a correct azimuth orientation of said box relative said pin is assured by an arrangement of said dog-clutch teeth around a circumference of said mechanical connector, including utilizing a non-uniform circumferential pitch distribution of said dog clutch-teeth around said circumference of said mechanical connector;
• and whereas said one or more set of said dog clutch-teeth is located near said set of said nipple seals.