초록 ▼

A multiphase piston-type pumping system including a feed line (13) for the fluid to be pumped and a discharge line (19) for the pumped fluid, with at least one first variable-volume chamber (2) designed for pumping, the fluid, and with chamber being defined by a first cylinder head (3), a first cyli

A multiphase piston-type pumping system including a feed line (13) for the fluid to be pumped and a discharge line (19) for the pumped fluid, with at least one first variable-volume chamber (2) designed for pumping, the fluid, and with chamber being defined by a first cylinder head (3), a first cylinder (4), and a first piston (5), whereby piston (5) moves along the longitudinal axis of cylinder (4) in the cylinder (4). A first drive element (6) moves the piston (5) in the cylinder (4). The system also has a casing (23) surrounding at least the space swept by piston (5), with the space being opposite the first chamber (2) with respect to and with the piston (5), said easing (23) containing a gaseous fluid. The piston (5) has a recess (20) designed to receive a projection (10) integral with cylinder head (3), whereby these two elements produce a jet of fluid directed at a discharge port (15).

대표청구항 ▼

A device for pumping a multiphase fluid having a liquid phase and a gas phase, the device comprising a feed line for feeding the fluid to be pumped, a discharge line for discharging pumped fluid, at least one variable-volume chamber for pumping said fluid, said chamber being defined by a cylinder he

A device for pumping a multiphase fluid having a liquid phase and a gas phase, the device comprising a feed line for feeding the fluid to be pumped, a discharge line for discharging pumped fluid, at least one variable-volume chamber for pumping said fluid, said chamber being defined by a cylinder head, a cylinder, and a piston movable in the cylinder along a longitudinal axis of the cylinder, said piston having a recess facing an upper part of the piston, said cylinder head including a projection having a cross-sectional configuration matching a cross-sectional configuration of said recess so as to enable said projection to penetrate into said recess when said piston approaches said cylinder head with the projection being splayed and the cross-section of the projection being largest adjacent to a remainder of the head facing the chamber and a valve means provided in said projection for controlling a feed of the multiphase fluid from said feed line into said at least one variable volume chamber, and wherein, when said projection penetrates into said recess of said piston, cooperating surfaces of said projection and said recess produce a high speed jet of multiphase fluid directed directly toward at least one discharge port for discharging said multiphase fluid.