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All-metal conical combined screw pump suitable for petroleum field

An all-metal, screw pump technology, used in rotary piston/oscillating piston pump components, pumps, pump components, etc., can solve problems such as short service life and sand sticking, achieve pump efficiency maintenance, avoid sand sticking, realize The effect of pump body pressure

Pending Publication Date: 2019-05-07
WUXI HENGXIN BEISHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an all-metal conical combined screw pump suitable for the petroleum field, which can thoroughly solve the technical problems of the existing all-metal screw pumps with short service life and sand stuck

Method used

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  • All-metal conical combined screw pump suitable for petroleum field
  • All-metal conical combined screw pump suitable for petroleum field

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Embodiment Construction

[0030] Such as figure 1 , figure 2 As shown, the all-metal conical combined screw pump suitable for the petroleum field includes a stator, a rotor 2, a casing 3 and a sucker rod 4. The stator is formed by fixedly connecting two or more stator units 1 in the axial direction. There is an internal thread curved surface, the rotor 2 is installed in the stator and is provided with an external thread curved surface matching the internal thread curved surface, the internal thread curved surface is a double-start thread, and the external thread is a single-start thread. In other embodiments, the M of the internal thread curved surface is also The value can be 3 or 4, the N of the external thread surface can also be 2 or 3, M=N+1, the stator is fixedly connected with the casing 3, the sucker rod 4 is installed in the casing 3, and the sucker rod The whole is formed by detachable fixed connections of several sections of sucker rods. The curved surface of the internal thread and the cu...

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Abstract

The invention provides an all-metal conical combined screw pump suitable for the petroleum field, and the technical problems that an existing all-metal screw pump is short in service life and is subjected to sticking can be solved. The all-metal conical combined screw pump suitable for the petroleum field comprises a stator, a rotor, a sleeve pipe and a sucker rod. The all-metal conical combined screw pump is characterized in that an internal threaded curved surface and an external threaded curved surface are each of a conical spiral structure and have the same taper, and the end, with the larger radial dimension, of the internal threaded curved surface and the end, with the larger radial dimension, of the external threaded curved surface are close to the sucker rod. The all-metal conicalcombined screw pump further comprises an elastic telescopic assembly which comprises a movable part, a fixed part and an elastic part, wherein the movable part is fixedly connected with the rotor, thefixed part is fixedly connected with the sucker rod, and the movable part and the fixed part are vertically matched with each other in a sliding manner and can transmit torque for the sucker rod andthe rotor; and one end of the elastic part abuts against the movable or the rotor, the other end of the elastic abuts against the fixed part or the sucker rod, and the elastic part can elastically contract or elastically expand in the sliding direction of the movable part.

Description

technical field [0001] The invention relates to the field of special pumps for oil exploitation, in particular to an all-metal conical combined screw pump suitable for the oil field. Background technique [0002] Gas injection oil recovery is aimed at viscous crude oil, injecting hot steam into the oil field to reduce the viscosity of heavy oil and facilitate extraction. [0003] Since the hot steam will accelerate the aging of the rubber of the rubber screw pump, the rubber screw pump is lifted and taken out during gas injection, resulting in long working hours and low efficiency. The stator and rotor of the all-metal screw pump are made of metal, which has strong high temperature resistance and does not need to be taken out during the gas injection process. Therefore, the all-metal screw pump has unique advantages compared with the rubber screw pump when it is suitable for gas injection oil production. [0004] The radial dimensions of the stator and rotor of the existin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/107F04C13/00F04C15/00
CPCF04C2/107F04C13/008F04C2250/201F04C15/0046F04C2/1073F04C2/1071F04C15/0061E21B43/126E21B43/121F04C2/16F04C15/0057F04C2210/206F04C2240/10F04C2240/20F04C2240/60
Inventor 梁海洋周光张志海
Owner WUXI HENGXIN BEISHI TECH CO LTD
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