Patent ID: 8201627
Filing Date: 2012-06-19
Classification: E21B

Abstract:
1. A double top drive swivel insertable into a drill or work string comprising: (a) a mandrel having upper and lower end sections, the upper section being connectable to and rotatable with an upper drill or work string section and the lower section being connectable to and rotatable with a lower drill or work string section, the mandrel including a longitudinal passage; (b) a first sleeve, the first sleeve being rotatably connected to the mandrel by a first plurality of longitudinally spaced bearings; (c) a first seal between the mandrel and first sleeve, the first seal preventing leakage of fluid between the mandrel and first sleeve; (d) the first sleeve comprising an inlet port positioned between the first plurality of spaced bearings; (e) the mandrel comprising a first plurality of longitudinally spaced apart radial ports in fluid communication with both the inlet port of the first sleeve and the longitudinal passage of the mandrel to supply pressurized fluid from the inlet port of the first sleeve to the longitudinal passage of the mandrel; (f) a second sleeve having a longitudinal sleeve passage, the second sleeve being rotatably connected to the mandrel by a second plurality of longitudinally spaced bearings; (h) a second seal between the mandrel and second sleeve, the second seal preventing leakage of fluid between the mandrel and second sleeve; (i) the second sleeve comprising an inlet port positioned between the second plurality of spaced bearings; (j) the mandrel comprising a second plurality of longitudinally spaced apart radial ports in fluid communication with both the inlet port of the second sleeve and the longitudinal passage of the mandrel to supply pressurized fluid from the inlet port of the second sleeve to the longitudinal passage; and (k) wherein the first and second sleeves are independently rotatable relative to the mandrel.