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1.发明公开公开(公告)号：US20240133376A1
公开(公告)日：2024-04-25
申请号：US18390414
申请日：2023-12-20
CPC分类号： F04C2/16 , F04C15/0023
摘要： A submersible multi-stage labyrinth-screw pump, having a rotor shaft; an end seal for the rotor shaft; an axial unloading unit integrated into the end seal of the rotor shaft; a lower radial bearing; a longitudinal channel, which connects a high-pressure zone at an exit for the rotor and the chamber of the axial unloading unit of the shaft, the axial unloading unit comprising a thrust block with a wear-resistant insert, a thrust collar, mated with a segment of the end seal, the end seal housing, a spring, a thrust ring, and a seat sleeve of the end seal, wherein the end seal of the rotor shaft's axial unloading unit operates as follows, when high pressure appears in the chamber of the rotor shaft's axial unloading unit, the fluid is kept from unproductive flows by hermetic contact of the ground insert of a segment and a seat of the end seal.
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公开(公告)号：US11867176B1
公开(公告)日：2024-01-09
申请号：US17717889
申请日：2022-04-11
IPC分类号： F04C18/107 , F04C23/00 , F04C27/00 , F04C29/12 , E21B43/12 , F04D17/12 , F04D29/42 , F04D29/16 , F04D29/057 , F04D3/02
CPC分类号： F04C18/107 , E21B43/121 , F04C23/001 , F04C27/008 , F04C29/12 , F04D17/12 , F04D29/057 , F04D29/162 , F04D29/4213 , F04C2240/10 , F04C2240/20 , F04C2240/30 , F04C2240/50 , F04C2240/54 , F04C2240/60 , F04C2240/802 , F04D3/02
摘要： An apparatus for a submersible screw pump includes a cylindrical rotor located inside of a cylindrical stator. The rotor has a screw thread formed in an opposite direction in relation to screw threads of the stator. The external surface of the rotor has a curvilinear shape and the internal surface of the stator has semicircular shapes without rectangular edges. These surface features of the rotor and stator obtain high speed performance for the apparatus with reduced vortices. A gap between the internal surface of the stator and the external surface of the rotor is 0.1-0.2 millimeters. A unloading thrust bearing is attached to a rotor shaft positioned between an intake thrust bearing and the intake end of the rotor. A cavity in the unloading thrust bearing is configured to receive production fluid from the discharge end of the rotor.
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公开(公告)号：US11799347B2
公开(公告)日：2023-10-24
申请号：US17993078
申请日：2022-11-23
发明人： Anton Shakirov , Vitaly Koropetskiy , Iaroslav Alekseev , Vadim Batalov , Anton Gorislavskiy , Anton Shkolnyi
摘要： A heel assembly of a submersible oil-filled electric motor contains a thrust bearing and an annular heel having grooves, enabling pumping liquid into the grooves when the heel rotates. The heel assembly is made with a through channel for fluid flow. At least part of the surface of the channel is formed by the inner annular surfaces of the heel and thrust bearing, and the above grooves are arcuate and form at least the first and second group of grooves. In the first group of grooves, each groove is made with an end closed for the fluid flow and with an end open for the fluid flow, located on the outer boundary of the annular heel with an outer diameter D1. In the second group of grooves, each groove is made with an end closed for the fluid flow and with an end open for the fluid flow.
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公开(公告)号：US20230193903A1
公开(公告)日：2023-06-22
申请号：US17972813
申请日：2022-10-25
IPC分类号： F04C18/107 , F04D29/16 , F04D29/42 , F04C29/12 , F04D17/12 , F04D29/057 , E21B43/12 , F04C23/00 , F04C27/00
CPC分类号： F04C18/107 , F04D29/162 , F04D29/4213 , F04C29/12 , F04D17/12 , F04D29/057 , E21B43/121 , F04C23/001 , F04C27/008 , F04C2240/10 , F04C2240/54 , F04C2240/30 , F04C2240/20 , F04D3/02
摘要： A cylindrical rotor inside of the cylindrical stator, wherein the cylindrical rotor has a screw thread with an opposite direction relating to the stator screw thread, wherein the rotor has a curvilinear external surface shape and a stator having an internal semicircular surface shape wherein rotor external surface shape and the stator has an internal surface shape having rounded shapes without rectangular edges to obtain high speed performance with reduced vortices, wherein a gap between the internal surface of the stator and the external surface of the rotor is 0.1-0.2 millimeters and an unloading thrust bearing attached to the rotor shaft positioned between intake thrust bearing and the intake end of the rotor and a cavity in the unloading thrust bearing configured to receive production fluid from the discharge end of the rotor.
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