Oil-water separate mining string of bottom water reservoir and jet pump thereof

Abstract

The invention discloses an oil-water separate mining string of a bottom water reservoir and a jet pump thereof, which aim to overcome the defects of shorter service life and lower operability of the adjusting mode of an oil-water liquid quantity ratio existing in the conventional oil-water separate mining production string of the bottom water reservoir. In the string, an electric submersible centrifugal pump, a check valve, a packer, the jet pump and an oil pipe are fixedly connected with one another in turn from bottom to top; the packer is positioned at an oil-water boundary of the bottom water reservoir; a pump barrel, an adapter joint, a connecting barrel, an oil inlet joint and a lower joint are fixedly connected with one another from top to bottom to form a pump body; an upper sealing sleeve is arranged between the upper end face of the connecting barrel and the lower end face of a boss in the adapter joint; a lower sealing sleeve is arranged between the upper end face of the lower joint and the lower end face of a boss in the oil inlet joint; and an upper sealing ring and a lower sealing ring which are fixedly arranged at the periphery of a pump core are positioned on the upper sealing sleeve and the lower sealing sleeve of the pump body respectively to form sealing. The invention has the advantages that: the oil-water separate mining string has a rational structure, the separate mining on the same layer of the bottom water reservoir is realized, and the oil well development effect and the ultimate recovery ratio are improved.

Description

Technical field [0001] The invention relates to a bottom water reservoir oil production string, in particular to a bottom water reservoir oil-moisture recovery string and a jet pump thereof. Background technique [0002] In the middle and late stages of production in bottom water reservoirs, water breakthrough is inevitable in oil wells. If reasonable and effective water control measures are not taken, the production will decrease rapidly, the recovery rate will decrease, and the development effect will deteriorate. One of the technologies of water reservoir. Most of the existing bottom water reservoirs are exploited using the combination of water plugging + water control, mechanical plugging + chemical plugging to control the rising speed of water cut and the occurrence of water ridges and water cones; double-acting pumps are also used for oil-water recovery operations , the upper and lower two full-tube well pumps of the double-acting pump exploit the oil in the upper par...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the short service life of the oil-water recovery production string in the existing bottom water reservoir, the adjustment method of the oil-water liquid ratio is not operable, and the working process of the electric submersible centrifugal pump-jet pump cannot make full use of the bottom water The bottom water in the oil reservoir is used as the power source to realize the shortage of oil-water recovery operation. The invention provides an oil-water recovery pipe column and its jet pump in the bottom water oil reservoir.

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