High pressure transfer motor-pump

Abstract

A high pressure transfer motor-pump providing for pumping a wide range of process fluids (e.g. chemicals, multiphase fluids, and particle polluted fluids) between intake and outlet ports at high pressure with little to zero leak to the environment and little to no contamination between the pumped process fluid and the driving hydraulic fluid. In accordance to an embodiment a high pressure transfer motor-pump includes a process fluid path extending between an inlet port and an outlet port, a cylinder having a barrier separating a hydraulic fluid path from the process fluid path, a motor coupled across a dynamic seal to a hydraulic pump to manipulate the cylinder barrier by circulating a hydraulic fluid through the hydraulic supply fluid path and a housing pressurized at an inlet pressure of the inlet port and encapsulating the motor, the pump, the dynamic seal and the hydraulic fluid.

What is claimed is: 
     
         1 . A high pressure transfer motor-pump, the motor-pump comprising:
 a process fluid path extending between an inlet port and an outlet port;   a cylinder having a barrier separating a hydraulic fluid path from the process fluid path;   a motor coupled across a dynamic seal to a hydraulic pump to manipulate the cylinder barrier by circulating a hydraulic fluid through the hydraulic supply fluid path; and   a housing encapsulating the motor, the pump, the dynamic seal and the hydraulic fluid, wherein the housing is pressurized at an inlet pressure of the inlet port.   
     
     
         2 . The motor-pump of  claim 1 , wherein the cylinder barrier is a piston. 
     
     
         3 . The motor-pump of  claim 1 , wherein the cylinder barrier is a membrane. 
     
     
         4 . The motor-pump of  claim 1 , wherein the cylinder comprises at least two cylinders. 
     
     
         5 . The motor-pump of  claim 1 , wherein:
 the cylinder barrier is a piston; and   the cylinder comprises at least two cylinders.   
     
     
         6 . The motor-pump of  claim 1 , wherein:
 the cylinder barrier is a membrane; and   the cylinder comprises at least two cylinders.   
     
     
         7 . A fluid sampling system; comprising:
 a process fluid path extending between an inlet port and an outlet port;   a sensor in communication with the process fluid path to detect a characteristic of a process fluid;   a cylinder having a barrier separating a hydraulic fluid path from the process fluid path;   a motor coupled across a dynamic seal to a hydraulic pump to manipulate the cylinder barrier by circulating a hydraulic fluid through the hydraulic supply fluid path; and   a housing encapsulating the motor, the pump, the dynamic seal and the hydraulic fluid, wherein the housing is pressurized at an inlet pressure of the inlet port.   
     
     
         8 . The sampling system of  claim 7 , wherein the cylinder barrier is a piston. 
     
     
         9 . The sampling system of  claim 7 , wherein the cylinder barrier is a membrane. 
     
     
         10 . The sampling system of  claim 7 , wherein:
 the cylinder barrier is a piston; and   the cylinder comprises at least two cylinders.   
     
     
         11 . The sampling system of  claim 7 , wherein:
 the cylinder barrier is a membrane; and   the cylinder comprises at least two cylinders.   
     
     
         12 . A method comprising:
 operating a motor-pump to transfer a process fluid from an inlet port at an inlet pressure to an outlet port at an outlet pressure, the motor-pump comprising:
 a process fluid path extending between the inlet port and the outlet port; 
 a cylinder having a barrier separating a hydraulic fluid path from the process fluid path; 
 a motor coupled across a dynamic seal to a hydraulic pump to manipulate the cylinder barrier by circulating a hydraulic fluid through the hydraulic supply fluid path; and 
 a housing encapsulating the motor, the pump, the dynamic seal and the hydraulic fluid, wherein the housing is pressurized at the inlet pressure. 
   
     
     
         13 . The method of  claim 15 , wherein the inlet pressure is higher than a pressure of the environment exterior of the housing. 
     
     
         14 . The method of  claim 15 , wherein the inlet pressure and the outlet pressure are substantially equal. 
     
     
         15 . The method of  claim 15 , wherein the cylinder barrier is a piston. 
     
     
         16 . The method of  claim 15 , wherein the cylinder barrier is a membrane. 
     
     
         17 . The method of  claim 15 , comprising transferring the process fluid at the inlet pressure through a sampling system in fluid communication with the process fluid path. 
     
     
         18 . The method of  claim 15 , comprising transferring the process fluid at the inlet pressure through a sampling system in fluid communication with the process fluid path; and
 the inlet pressure and the outlet pressure are substantial equal.   
     
     
         19 . The method of  claim 18 , wherein the cylinder barrier is a piston. 
     
     
         20 . The method of  claim 18 , wherein the cylinder barrier is a membrane.