System and method for direct drive pump

摘要

A direct drive pump employs an on-off tool to attach the drive rod string to a floating pump drive shaft in both torsion and tension. The downward thrust on the drive shaft, as well as the weight of the drive rod string, is born by a thrust bearing in the drivehead at the surface. A floater pump is used with this direct drive pump to permit the free vertical movement of the drive shaft. When a tandem direct drive pump is employed a housing containing a tandem pump drive shaft connector connects the shafts in an upper and lower tandem pump to permit the two to freely move in the tandem direct drive pump.

主权项

1. A method of using a direct drive pump system comprising the steps of:
providing a pump, said pump having rotors, connecting said rotors to pump drive shafts in torque; connecting said pump drive shaft to a drive rod string in tension; and imparting downward thrust force received by the pump drive shaft to said drive rod string; wherein said downward thrust force carried by said drive rod string is carried at a surface of the system by a drive head.