Downhole hydraulic pump apparatus having a "free" jet pump and safety valve assembly and method

A hydraulic pump apparatus for a well assembly including a rigid, elongated tubular casing extending into a formation producing production fluid, the hydraulic pump apparatus comprising:

• an elongated tube;
• a retrievable bottom-hole assembly mounted proximate a lower end of said elongated tube, said elongated tube and said bottom-hole assembly both being adapted for selective insertion into the tubular casing, said bottom-hole assembly comprising:
• an upper bottom-hole assembly having an upper bore therethrough;
• a middle bottom-hole assembly having a middle longitudinal bore therethrough, a fluid longitudinal port therethrough and a radial discharge port;
• and
• a lower bottom-hole assembly having a lower bore and a safety valve therein, said safety valve having a closed position which blocks said lower bore below said safety valve from said middle longitudinal bore and said fluid longitudinal port,
• wherein said lower bottom-hole assembly is connected to said middle bottom-hole assembly and said middle bottom-hole assembly is connected to said upper bottom-hole assembly;
• and
• a free pump assembly formed for sliding receipt in said elongated tube, said free pump assembly comprising:
• an upper pump body formed for sliding receipt in said upper bottom-hole assembly;
• and
• a lower extension assembly connected to said upper pump body, said lower extension assembly having a first portion and a second portion, said first portion formed to open said safety valve upon seating of said free pump assembly in said bottom-hole assembly, and said second portion having an extension discharge port formed to be in fluid communication with said radial discharge port of said middle bottom-hole assembly upon seating of said free pump assembly in said bottom-hole assembly, said lower extension assembly further comprising:
• a first seal below said extension discharge port;
• and
• a second seal above said extension discharge port,
• wherein said first and second seals form fluid tight seals between said lower extension assembly and said bottom-hole assembly when said free pump assembly is seated in said bottom-hole assembly.