Patent ID: 8118089
Filing Date: 2012-02-21
Classification: E21B,F04B

Abstract:
1. An improved fluid delivery system for a deep well in which the fluid to be raised to the surface is in a sub surface pay zone; said delivery system including a rod string, a pump disposed in the pay zone, attached to said rod string and a drive head at the surface of the well, said pump and said drive head being positively connected in order that said drive head causes said pump to rotate to deliver fluid under pressure upwardly to the surface of the well; a tubular housing circumscribing a portion of said rod string, a transmission in said tubular housing; said transmission interposed between said drive head and said pump on said rod string, said transmission adapted to receive power from said drive head and deliver power to said pump at said pump's optimum performance level; and at least one pathway passing through said transmission capable of receiving fluid under pressure from said pump and delivering said pumped fluid toward the surface of said well.