Underground dynamic cyclone separation system for screw pump

Abstract

The invention discloses an underground dynamic cyclone separation system for a screw pump. The underground dynamic cyclone separation system involves an outer sleeve, a stator, a screw shaft rotor, a cyclone overflow pipe, a cyclone cavity, a cyclone underflow pipe, an inner cone and an overflow oil transportation branch pipe, the screw shaft rotor, the overflow oil transportation branch pipe, the cyclone overflow pipe, the inner cone, the cyclone cavity, an outer cone section and the underflow pipe are fixedly connected in sequence on the same central axis to form an integrated rotating structural part, and the integrated rotating structural part is driven by a screw rod to rotate integrally; a cyclone rectangular tangential inlet is opposite to the spiral direction; the stator is matched and connected with the overflow oil transportation branch pipe and the screw rod at the upper part of the cyclone overflow pipe to form an oil collection cavity and a spiral oil transportation gap correspondingly; the outer sleeve is in transition connection with the cyclone overflow pipe through a first bearing, and the first bearing is close to the stator above and is welded on the inner side of the outer sleeve; and the outer sleeve and the cyclone underflow pipe are in transition connection through a second bearing and a second bearing filling ring which are located at the joint of a cyclone conical section and the cyclone underflow pipe. The separation system has the advantages of high separation efficiency, low cost, small radial size and convenience in operation.

Description

technical field [0001] The invention relates to a two-phase separation treatment device applied in the fields of petroleum, chemical industry, environmental protection and the like. Background technique [0002] At present, in the production fluid water treatment technology used in the oil production well site, most of the production fluid is pumped to the ground and then subjected to sedimentation, cyclone and other separation treatment of the production fluid. In oil fields, such methods are widely used. The processing method takes too much cost. At present, the oil-water separation and reinjection technology in the same well injection and production wells is becoming more and more mature. This technology can directly process the high water content production fluid through the downhole, avoiding a large amount of invalid water to be transported to the ground, and instead realize the reinjection cycle in the wellbore, which can greatly reduce Lifting energy consumption and...

AI Technical Summary

Problems solved by technology

The problems in the prior art are: due to the structural characteristics and working methods of the static hydrocyclone itself, the static hydrocyclone is subject to various restrictions in further improving the separation efficiency, especially when dealing with high-viscosity media (such as heavy oil) During the separation operation, the viscosity of the working medium is large, the internal friction resistance is large, and the pressure loss increases, which makes it difficult to meet the special production needs of the oilfield site

However, this additional power equipment has brought problems such as high energy consumption, easy damage to rotating parts, unreliable sealing, and easy wear and tear.

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