| 摘要 |
<p>A pumping system including two pumps (7) operable in tandem is capable of developing a power of the order of 1000kW. The pumping system is used downhole in a reservoir to withdraw water at a sufficiently high rate or pressure to effect depressurising of the reservoir and enhance the recovery factor. The pumping system has two pump assemblies (1) each discharging fluid into a respective bypass conduit (2). The conduits (2) discharge fluid flowing therein into a production tubing (3). An anti-recirculation means (10) is coupled to the outlet of the discharge head (8) of each pump assembly (1) by way of a housing (11). The anti-recirculation means (10) is a one way valve arranged to prevent the flow of fluid from the bypass conduit (2) towards the pump or pumps (7). Two bypass conduits (2') may be provided for the two pump assemblies (1) or an elongate conduit (2'') having a crescent shaped cross section may be provided to have an increased fluid capacity.</p> |
