High pressure tubular swivel joint

A swivel joint comprising:

• a first swivel body having a first end, said first swivel body having an end face on the first end thereof and a passage extending through said first swivel body communicating with the first end, said passage including:
• a first cylindrical inner surface communicating with the end face;
• a second inner surface having a diameter less than the diameter of the first cylindrical inner surface;
• and a shoulder extending between the first and second inner surfaces;
• a second swivel body having a first end and a second end, said second swivel body including:
• an end face on the first end thereof;
• and a passage extending through said second swivel body communicating the first and second ends, said passage including:
• a first inner surface communicating with the end face;
• a second cylindrical inner surface;
• and a shoulder extending between said first and second inner surfaces;
• a third swivel body having a first end and having a passage therein communicating with the first end thereof and having a cylindrical outer surface having a diameter less than the diameter of the second cylindrical inner surface of said second swivel body, said third swivel body being disposed within the second cylindrical inner surface of said second swivel body, said passage through said third swivel body including:
• a first cylindrical inner surface communicating with the first end of said third swivel body;
• a second inner surface having a diameter less than the diameter of the first cylindrical inner surface;
• and a shoulder extending between the first and second inner surfaces;
• a sleeve having a first end and a second end and a passage extending therethrough communicating the first and second ends, said sleeve further including:
• an outwardly extending flange formed on the exterior of said sleeve intermediate the first and second ends;
• a first cylindrical outer surface on said sleeve communicating with the first end of said sleeve and being received within the first cylindrical inner surface of said first swivel body;
• a second cylindrical outer surface on said sleeve communicating with the second end of said sleeve;
• a first end face on the first end of said sleeve;
• and a second end face on the second end of said sleeve, the second end of said sleeve extending into the first cylindrical inner surface of said third swivel body;
• static annular seal means disposed intermediate the first end of said sleeve and the first cylindrical inner surface of said first swivel body for providing a fluid-tight seal between said sleeve and said first swivel body;
• dynamic annular seal means disposed intermediate the second end face of said sleeve and the first cylindrical inner surface and the shoulder of said third swivel body for providing a sliding fluid-tight seal between said sleeve and said third swivel body;
• rotary bearing means disposed intermediate the cylindrical outer surface of said third swivel body and the second cylindrical inner surface of said second swivel body for journally supporting said third swivel body within said second swivel body for rotation about the axis of the second cylindrical inner surface of said second swivel body;
• and
• means for connecting said first and second swivel bodies and engaging the outwardly extending flange of said sleeve between the end faces of said first and second swivel bodies and preventing relative movement therebetween.

A swivel joint comprising:

• a first swivel body having a first end and a second end, said first swivel body having an end face formed on the first end thereof and an outwardly extending flange formed thereon adjacent the first end thereof, a passage extending through said first swivel body communicating the first and second ends, said passage including a first cylindrical inner surface communicating with the end face, a second cylindrical inner surface having a diameter less than the first cylindrical inner surface and an annular shoulder extending between said first and second cylindrical surfaces;
• a second swivel body having a first end and a second end, said second swivel body having an end face formed on the first end thereof and an outwardly extending flange formed thereon adjacent the first end thereof, a passage extending through said second swivel body communicating the first and second ends, said passage including a first cylindrical inner surface communicating with the end face, a second cylindrical inner surface having a diameter greater than the first cylindrical inner surface and an annular shoulder extending between said first and second cylindrical surfaces;
• a third swivel body having a first end and a second end and having a passage extending therethrough communicating the first and second ends thereof and having a cylindrical outer periphery, said third swivel body being disposed within the second cylindrical inner surface of said second swivel body with the first end thereof adjacent the annular shoulder of said second swivel body, said passage through said third swivel body including a first cylindrical inner surface communicating with the first end of said third swivel body, a second cylindrical inner surface having a diameter less than the first cylindrical inner surface communicating with the second end of said third swivel body, and an annular shoulder extending between the first and second cylindrical inner surfaces;
• a tubular sleeve having a first end and a second end and a passage extending therethrough communicating the first and second ends, an outwardly extending flange formed on the exterior of said sleeve intermediate the first and second ends, a first cylindrical outer surface formed on said sleeve extending from the flange to the first end of said sleeve and having a diameter slightly less than the diameter of the first cylindrical inner surface of said first swivel body and being received within the first cylindrical inner surface of said first swivel body, a second cylindrical outer surface formed on said sleeve extending from the flange to the second end of said sleeve and having a diameter slightly less than the diameter of the first cylindrical inner surface of said second swivel body and slightly less than the diameter of the first cylindrical inner surface of said third swivel body, a first end face formed on the first end of said tubular sleeve, a second end face formed on the second end of said tubular sleeve, the second end of said tubular sleeve extending through the first cylindrical inner surface of said second swivel body and extending into the first cylindrical inner surface of said third swivel body;
• static annular seal means disposed intermediate the first end face of said tubular sleeve and the first cylindrical inner surface and the annular shoulder of said first swivel body for providing a fluid-tight seal between said sleeve and said first swivel body;
• dynamic annular seal means disposed intermediate the second end face of said tubular sleeve and the first cylindrical inner surface and the annular shoulder of said third swivel body for providing a sliding fluid-tight seal between said sleeve and said third swivel body;
• rotary bearing means disposed intermediate the cylindrical outer periphery of said third swivel body and the second cylindrical inner surface of said second swivel body for journally supporting said third swivel body within said second swivel body for rotation about the axis of the second cylindrical inner surface of said second swivel body;
• and
• clamp means for mutually engaging the flanges of said first and second swivel bodies and engaging the outwardly extending flange of said tubular sleeve between the end faces of said first and second swivel bodies for preventing relative movement therebetween.