Document Type and Number:
Japanese Patent JPS5191003
Kind Code:
A
Abstract:
A down hole pump and, more particularly, a turbine driven geothermal down hole pump has a housing insertable in a well casing to a depth wherein geothermal liquid is exposed to the inlet of the pump contained in the housing and with a turbine in the housing for driving the pump and which is supplied with a part of the pumped liquid which is filtered and returned under pressure as a power liquid for driving the turbine. The pump has a suction ejector supplied with spent power liquid received from the turbine for imposing a net positive suction head on liquid at the pump inlet and with this spent power liquid also being directed to an expansible seal surrounding a lower part of the housing to engage the seal with the well casing. The drive shaft between the turbine and the pump is rotatably mounted by journal bearings with power liquid returned from ground level being supplied by passages to the journal bearings in a manner to avoid packing and mechanical seals for the shaft.
Application Number:
JP14648375A
Publication Date:
August 10, 1976
Filing Date:
December 10, 1975
Export Citation:
International Classes:
F04D13/08; E21B33/12; E21B43/12; F04B47/08; F04D9/06; F04D13/04; F04D29/04; F04D29/047; F04D29/66; (IPC1-7): F04D13/04