Ultra high pressure field end for a reciprocating pump

A pump fluid end comprising:

• a body having an inlet and an outlet;
• a plurality of parallel plungers reciprocably disposed in said body wherein:
• said plungers and said body define a plurality of pumping chambers within said body;
• and
• said body defines a plurality of accumulators within said body and adjacent to corresponding ones of said pumping chambers;
• and
• a collet assembly for grippingly engaging an end of each of said plungers extending from said body and adapted for connection to a pump drive end and minimizing stress loading on said ends of said plungers.

A pump fluid end comprising:

• a body having an inlet and an outlet;
• a plunger reciprocably disposed in said body;
• sealing means for sealing between said plunger and said body;
• accumulator means within said body and in communication with said outlet for internally minimizing discharge pressure fluctuations within the body as a result of reciprocation of said plunger, said accumulator means being characterized by an annular chamber defined in said body;
• and
• a collect assembly for connecting said plunger to a pump drive end, said collet assembly comprising:
• a split collet disposed around an end of said plunger;
• a collet hub disposed around said collet;
• an adapter adjacent to said collet hub and adapted for connection to said pump drive end;
• and
• fastening means for attaching said collet hub to said adapter and thereby clampingly engaging said collet with said plunger such that stress loading on said plunger is minimized.