Method and apparatus for producing an oil reservoir
AssigneeRead Group AS
InventorTore Kjos
Life of this patent
Estimating the term…
Abstract
A method for producing an oil reservoir, comprising establishing an oil producing well, producing a production fluid containing oil and water, transporting the production fluid to a downhole liquid/liquid hydrocyclone, separating the fluid in the liquid/liquid hydrocyclone into an oil enriched stream at the hydrocyclone underflow, transporting the oil enriched stream to the surface, reinjecting the water enriched stream at a downhole site, cooling the transported oil enriched stream by sending a counterflow of a cooling medium relative the oil enriched stream, thereby keeping the oil enriched stream in a substantially liquid phase.
Claims11
A method of producing an oil reservoir, comprising
- establishing an oil producing well,
- producing a production fluid containing oil and water,
- transporting said production fluid to a downhole liquid/liquid hydrocyclone,
- separating the production fluid in the liquid/liquid hydrocyclone into an oil enriched stream at the hydrocyclone overflow, and a water enriched stream at the hydrocyclione underflow,
- transporting the oil enriched stream to the surface,
- reinjecting the water enriched stream at a downhole site,
- cooling the transported oil enriched stream by sending a counterflow as a cooling medium relative to said oil enriched stream, thereby keeping the oil enriched stream in a substantially liquid phase,
- wherein said cooling medium is injection water.
An apparatus for producing an oil reservoir through an oil producing well, the apparatus comprising a downhole liquid/liquid hydrocyclone for separating a production fluid containing oil and water into an oil enriched stream and a water enriched stream, a downhole pump for pumping said oil enriched stream to the surface, and means for sending a counterflow of a cooling medium relative to the surface pumped oil enriched stream.
An apparatus for producing an oil reservoir through an oil producing well, the apparatus comprising a downhole liquid/liquid hydrocyclone for separating a production fluid containing oil and water into an oil enriched stream and a water enriched stream, a downhole pump for pumping said oil enriched stream to the surface, and means for sending a counterflow of a cooling medium relative to the surface pumped oil enriched stream, said means for sending said counterflow including a means for sending a flow of injection water down said well, including a downhole turbine driven by the injection water, said turbine being in drive connection with said downhole pump.
An apparatus for producing an oil reservoir through an oil producing well, the apparatus comprising a downhole liquid/liquid hydrocyclone for separating a production fluid containing oil and water into an oil enriched stream and a water enriched stream, a downhole pump for pumping said oil enriched stream to the surface, and means for sending a counterflow of a cooling medium relative to the surface pumped oil enriched stream, including a downhole solid/liquid hydrocyclone in the well at a position above said downhole pump, said downhole solid/liquid hydrocyclone having an inlet, an overflow and an underflow, said inlet being connected with an aquifer, said overflow ejecting re-injection water down the well to the reservoir, and said underflow ejecting solids enriched liquid to a downhole site, preferably to said aquifer.
Dependencies are inferred from the claim text.