Fluid end

Abstract

A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number of vertical passages each of which intersect one of the horizontal passages and contains a suction valve at its bottom and a discharge valve at its top. A suction manifold is hingedly attached to the bottom of body to provide a flow of fluid into the body via the suction valves. A discharge passage intersects the vertical passages and receives fluid pressurized by the plungers via discharge valves and ports such from the fluid end.

1 . A piston and valve seat of a suction valve comprising:
 said valve seat forming a tube with open, top and bottom surfaces;   a piston having a head for engaging said top surface of said valve seat and a stem extending downwardly from said head through said valve seat, said stem having a transverse aperture at a lower end of said stem; and wherein   said valve seat and piston have an installed position where in said installed positioned said valve seat and piston are in a body of a fluid end.   
   
   
       2 . The piston and valve seat of the suction valve of  claim 1 , wherein said fluid end is part of a high pressure pump. 
   
   
       3 . The piston and valve seat of the suction valve of  claim 2  wherein the fluid end of the high pressure pump is a forged metal mono-block. 
   
   
       4 . The piston and valve seat of the suction valve of  claim 3  wherein the high pressure pump is an oil field pump. 
   
   
       5 . A high pressure pump piston for mating with a valve seat said pump piston comprising:
 a stem having an end opposite a head;   a keeper pin transverse aperture and a lock pin aperture adjacent said end, said lock pin aperture at a right angle to said keeper pin aperture and said lock pin aperture intersects a bottom portion of the keeper pin aperture and opens into said keeper pin aperture, said lock pin aperture being positioned relative to said keeper pin aperture so when a keeper pin is in place in the keeper pin aperture and a lock pin is in place in the lock pin aperture the lock pin and keeper pin interface with one another.   
   
   
       6 . The high pressure pump piston of  claim 5  wherein the keeper pin aperture is larger than the lock pin aperture. 
   
   
       7 . The high pressure pump piston of  claim 5  wherein the piston is in a high pressure pump. 
   
   
       8 . The high pressure pump piston of  claim 7  wherein the fluid end of the high pressure pump is a forged metal mono-block. 
   
   
       9 . The high pressure pump piston of  claim 8  wherein the high pressure pump is an oil field pump.