Plunger Pump

Abstract

A pump system according on one or more aspects of another embodiment of the present disclosure comprises a pair of plunger pumps disposed in a back-to-back assembly having a width that is less than about 102 inches, wherein each pump comprises a zero offset and at least a six inch stroke.

1 . A pump having a stroke length, the pump comprising;
 a housing comprising a cylinder having a cylinder axis and an entrance;   a plunger having a crosshead reciprocally disposed in the cylinder, the plunger comprising a power end section having an outside diameter and a fluid end section having an outside diameter that is different from the outside diameter of the power end section;   a manifold positioned adjacent to the cylinder for supplying and delivering fluid acted on by the plunger;   a crankshaft rotatably mounted in the housing, the crankshaft having crankshaft axis;   a connecting rod having a crankshaft end connected to the crankshaft and a connecting rod connected to the crosshead by a wrist pin;   a power end seal disposed adjacent to the entrance to the cylinder, wherein the power end section of the plunger is in sealing contact with the power end seal; and   a fluid end seal disposed adjacent to a port to the manifold, wherein the fluid end section of the plunger is in sealing contact with the fluid end seal.   
   
   
       2 . The pump of  claim 1 , wherein the outside diameter of the power end section of the plunger is larger than the outside diameter of the fluid end of the plunger. 
   
   
       3 . The pump of  claim 1 , wherein the cylinder axis and the crankshaft axis are co-planar with an axis of the wrist pin. 
   
   
       4 . The pump of  claim 1 , wherein the cylinder axis and the crankshaft axis are co-planar. 
   
   
       5 . The pump of  claim 1 , wherein the cylinder axis is co-planar with an axis of the wrist pin. 
   
   
       6 . The pump of  claim 1 , wherein the stroke length of the pump is at least about six inches. 
   
   
       7 . The pump of  claim 1 , wherein the power end section of the plunger comprises a length equal to about the stroke length of the pump plus two times the length of the power end seal. 
   
   
       8 . The pump of  claim 1 , wherein the fluid end section of the plunger comprises a length equal to about the stroke length of the pump plus two times the length of the fluid end seal. 
   
   
       9 . The pump of  claim 1 , wherein:
 the power end section of the plunger comprises a length equal to about the stroke length of the pump plus two times the length of the power end seal; and   the fluid end section of the plunger comprises a length equal to about the stroke length of the pump plus two times the length of the fluid end seal.   
   
   
       10 . The pump of  claim 9 , wherein the stroke length is at least about six inches. 
   
   
       11 . The pump of  claim 9 , wherein the outside diameter of the power end section of the plunger is larger than the outside diameter of the fluid end of the plunger. 
   
   
       12 . The pump of  claim 11 , wherein the stroke length is at least about six inches. 
   
   
       13 . The pump of  claim 9 , wherein the plunger is attached to the crosshead at a recessed portion of a fluid end of the crosshead, wherein the recessed portion is recessed toward the wrist pin relative to the fluid end of the crosshead. 
   
   
       14 . The pump of  claim 13 , wherein the recessed portion extends into the power end section of the plunger. 
   
   
       15 . A pump system, comprising a pair of plunger pumps disposed in a back-to-back assembly having a width that is less than about 102 inches, wherein each pump comprises a zero offset and at least a six inch stroke. 
   
   
       16 . The pump system of  claim 15 , wherein each pump of the pair of pumps comprises a plunger comprising a power end section having an outside diameter in sealing contact with a power end seal and a fluid end section having an outside diameter in sealing contact with a fluid end seal, wherein the outside diameter of the power end section is different from the outside diameter of the fluid end section. 
   
   
       17 . A plunger pump assembly, the assembly comprising a first pump and a second pump disposed in a back-to-back assembly having a width that is less than about 102 inches, wherein each of the first and the second pump comprises:
 a housing comprising a cylinder having a cylinder axis and an entrance;   a plunger having a crosshead reciprocally disposed in the cylinder, the plunger comprising a power end section having an outside diameter and a fluid end section having an outside diameter that is different from the outside diameter of the power end section;   a manifold positioned adjacent to the cylinder for supplying and delivering fluid acted on by the plunger;   a crankshaft rotatably mounted in the housing, the crankshaft having crankshaft axis;   a connecting rod having a crankshaft end connected to the crankshaft and a connecting rod connected to the crosshead by a wrist pin;   a power end seal disposed adjacent to the entrance to the cylinder, wherein the power end section of the plunger is in sealing contact with the power end seal; and   a fluid end seal disposed adjacent to a port to the manifold, wherein the fluid end section of the plunger is in sealing contact with the fluid end seal.   
   
   
       18 . The pump of  claim 17 , wherein the outside diameter of the power end section of the plunger is larger than the outside diameter of the fluid end of the plunger. 
   
   
       19 . The pump of  claim 17 , wherein the cylinder axis and the crankshaft axis are co-planar with an axis of the wrist pin. 
   
   
       20 . The pump of  claim 17 , wherein the cylinder axis and the crankshaft axis are co-planar. 
   
   
       21 . The pump of  claim 17 , wherein the cylinder axis is co-planar with an axis of the wrist pin. 
   
   
       22 . The pump of  claim 17 , wherein a stroke length of the pump is at least six inches. 
   
   
       23 . The pump of  claim 17 , wherein the power end section of the plunger comprises a length equal to about the stroke length of the pump plus two times the length of the power end seal. 
   
   
       24 . The pump of  claim 17 , wherein the fluid end section of the plunger comprises a length equal to about the stroke length of the pump plus two times the length of the fluid end seal. 
   
   
       25 . The pump of  claim 17 , wherein:
 the power end section of the plunger comprises a length equal to about the stroke length of the pump plus two times the length of the power end seal; and   the fluid end section of the plunger comprises a length equal to about the stroke length of the pump plus two times the length of the fluid end seal.