High torque and high capacity rotatable center core and floatable sealed body assemblies with universal RAM applications and method

A seal assembly for use in a drill string, comprising:

• a. a central core assembly, connected between a swivel on its upper end and the drill string below, having a central passageway therethrough;
• b. a first outer assembly, having a central bore for slidably engagement around a portion of the central core assembly;
• c. a second outer assembly, having a central bore for slidably engaging around a portion of the central core assembly above the first outer assembly;
• d. a pair of opposing transverse bores in both the first and second outer assemblies corresponding to a pair of transverse bores in the central core assembly;
• e. means for aligning the bores of the central core assembly and the first and second outer assemblies;
• f. rams positional in the transverse bores in the first and second outer assemblies for sealing off the central passageway in the central core assembly when moved to the sealing position.

A method of sealing off flow in a work string above the rig floor, during wireline operations, comprising the following steps:

• providing a central core assembly, having a bore therethrough and positioned between a swivel above it and the work string below it, the central core assembly capable of withstanding the weight of the work string connected to said central core assembly therefrom;
• engaging an outer assembly around the central core assembly, the outer assembly independent in relation to the central core assembly;
• providing a pair of bores through a wall of the outer assembly which align with a pair of bores in the central core assembly which communicate with the bore in the central core assembly;
• aligning the bores of the central core assembly with the bores of the outer assembly to allow a common flow passage therethrough;
• providing a pair of rams in each of the bores of the outer assembly wherein said rams are capable of moving from an open position to a closed position in order to seal the bore in the central core assembly;
• connecting a first end of said central core assembly to a swivel;
• connecting a second end of said central core assembly to the work string disposed within a well bore.