Patent ID: 8726994

Claim:
A double top drive swivel insertable into a drill or work string comprising: (a) a first mandrel having upper and lower end sections, the upper section being connectable to and rotatable with an upper drill or work string section, the first mandrel including a longitudinal passage; (b) a first sleeve, the first sleeve being rotatably connected to the first mandrel; (c) a first seal between upper and lower end portions of the first mandrel and first sleeve, the first seal preventing leakage of fluid between the first mandrel and first sleeve; (d) the first sleeve comprising an inlet port; (e) the first mandrel comprising a 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 first mandrel to supply pressurized fluid from the inlet port of the first sleeve to the longitudinal passage of the first mandrel; (f) a second mandrel having upper and lower end sections, the upper section being fluidly connected to the lower section of the first mandrel and the lower section of the second mandrel being connectable to and rotatable with a lower section of drill or work string section, the second mandrel including a longitudinal passage; (g) a second sleeve having a longitudinal sleeve passage, the second sleeve being rotatably connected to the second mandrel; (h) a second seal between upper and lower end portions of the second mandrel and second sleeve, the second seal preventing leakage of fluid between the second mandrel and second sleeve; (i) the second sleeve comprising an inlet; (j) the second mandrel comprising a 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 second mandrel to supply pressurized fluid from the inlet port of the second sleeve to the longitudinal passage of the second mandrel; and (k) a valve fluidly connecting the longitudinal passages of the first and second mandrels.