Abstract:
During production of hydrocarbons, an oil-gas flow from a well bottom to a well-head is subdivided into a plurality of individual oil-gas flows which flow in a plurality of individual passages (2, 3) located side-by-side with one another.
Abstract:
A method and device for reducing or eliminating axial thrust in a rotary machine such as a centrifugal pump or compressor by altering the fluid pressure in a cavity (31) or (32) formed between a rotor (20) and a housing (10). The device contains a disk (40) placed along the rotor (20) for subdividing the fluid in the cavity (32) in such a way that all annular gap leakage flow is channeled and pumped through the space (42) between that disk and the rotor from the center of the pump towards the periphery. As a result, the pressure in the cavity (32) is altered to reduce and control the axial thrust on the rotor (20) which becomes independent of the wear state of the shaft seals (61). In another embodiment, the step of flow subdividing is achieved by providing a set of braking vanes (56) along the periphery of the cavity (31) for reducing the rotational speed of the fluid coming from the cavity as well as from the annular gap and a stationary disk (50) is placed along the interior wall (11) of the housing (10) for directing the radial flow of that fluid towards the center of the pump.
Abstract:
During production of hydrocarbons, an oil-gas flow from a well bottom to a well-head is subdivided into a plurality of individual oil-gas flows which flow in a plurality of individual passages (2, 3) located side-by-side with one another.