CN207195171U - A kind of screw pump stator - Google Patents

Abstract

The utility model discloses a kind of screw pump stator, including metal stator body, the metal stator body is integral type structure, and the metal stator body offers spiral inner chamber along its axial direction, the spiral inner chamber is provided with 2~3 helixes, and is provided with wearing layer on the inwall of spiral inner chamber.A kind of metal stator body of screw pump stator uses integral structure, the characteristics of with linearity, good concentricity, it disclosure satisfy that the requirement to thickened oil recovery efficiency and power, and it is less prone to holddown phenomenon, in addition, by setting up wearing layer, anti-wear performance is substantially increased, extends its service life.

Description

A kind of screw pump stator

Technical field

It the utility model is related to oil production equipment field, more particularly to a kind of screw pump stator.

Background technology

At present, in the oil recovery machiner that China oil field uses, beam pumping unit occupies the majority, and its simple in construction, manufacture is held Easily, it is easy to maintenance, but the problem of high energy consumption, efficiency is low, and deepening continuously with the major oil field development in China be present in it, The development difficulty in oil field is continuously increased, the big viscous crude of particularly high sand content, viscosity, uses beam pumping unit warp difficult to realize Ji, effective exploitation.In view of the above problems, a kind of economical energy is good, pressure is high and uniform, uniform flow, rotating speed are high, tool The screw pump for having the features such as prop-carrying capacity is strong is used widely in thickened oil recovery.Screw pump is by the pump housing and screw rod institute shape Into engagement spatial volume change and mobile convey the drum pump that liquid is allowed to be lifted to surface duct or container.It is currently used for The stator of the screw pump of thin oil exploitation, is elastomer stator, its is wear-resisting, resistance to elevated temperatures is poor, and service life is short, can not be in high temperature Applied in gas injection thickened oil recovery operating mode, Given this problem, part producer uses metal stator, however, existing screw pump metal Stator, it is welded by multiple stator combinations, is influenceed by welding stress and using multistage splicing scale error, it can not Ensure the requirement of the physical dimensions such as linearity, the concentricity of whole stator, and helix docking can not fit like a glove, and be aspirated in rotation Among process, the defects of wastage is big, Fluid pressure is low, torque is excessive, easy holddown be present, it is difficult to meet to imitate thickened oil recovery The requirement of rate and power；In addition, existing screw pump metal stator, also there is that anti-wear performance is poor, flimsy problem, thus, It is badly in need of solving.

Utility model content

The purpose of this utility model is in view of the above-mentioned problems, a kind of screw pump stator is provided, to solve existing screw pump Stator is welded by multiple stator combinations, among rotation aspiration procedure, there is that wastage is big, Fluid pressure is low, torque Greatly, the defects of easy holddown, it is difficult to meet the requirement to thickened oil recovery efficiency and power, and existing screw pump stator anti-wear performance Poor, flimsy problem.

The purpose of this utility model is to be achieved through the following technical solutions：

A kind of screw pump stator, including metal stator body, the metal stator body are integral type structure, the metal Stator body offers spiral inner chamber along its axial direction, and the spiral inner chamber is provided with 2~3 helixes, and spiral inner chamber is interior Wearing layer is provided with wall.

As a kind of preferred scheme of the present utility model, the wearing layer is nitration case.

As a kind of preferred scheme of the present utility model, the thickness of the wearing layer is 0.02~0.08mm.

As a kind of preferred scheme of the present utility model, the both ends termination of the metal stator body is provided with external screw thread.

The beneficial effects of the utility model are that a kind of metal stator body of screw pump stator uses integral type knot Structure, there is the characteristics of linearity, good concentricity, disclosure satisfy that the requirement to thickened oil recovery efficiency and power, and be less prone to card Pump phenomenon, in addition, by setting up wearing layer, anti-wear performance is substantially increased, extend its service life.

Brief description of the drawings

Fig. 1 is a kind of structural representation of screw pump stator of the utility model；

Fig. 2 is schematic cross-sectional view of a kind of screw pump stator at A-A shown in Fig. 1.

Embodiment

Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by embodiment.It can manage Solution, embodiment described herein are used only for explaining the utility model, rather than to restriction of the present utility model.

It refer to shown in Fig. 1 and Fig. 2, in the present embodiment, a kind of screw pump stator, including metal stator body 1, it is described Metal stator body 1 is integral type structure, and its both ends termination is provided with external screw thread 3, and the metal stator body 1 is along its axial direction Spiral inner chamber 2 is offered, the spiral inner chamber 2 is provided with 2 helixes, and is provided with wearing layer on the inwall of spiral inner chamber 2, The wearing layer is nitration case, and the thickness of wearing layer is 0.02~0.08mm.

Although it is noted that in the present embodiment, the thickness of wearing layer is 0.05mm, and the utility model is not limited to This, the thickness of wearing layer can also be for 0.02mm or 0.08mm or positioned at any value between the two, and the present embodiment is to combine Preferred scheme after cost and abrasion resistant effect.

A kind of metal stator body 1 of above-mentioned screw pump stator uses integral structure, has linearity, good concentricity Feature, the requirement to thickened oil recovery efficiency and power is disclosure satisfy that, and be less prone to holddown phenomenon, in addition, wear-resisting by setting up Layer, substantially increases anti-wear performance, extends its service life.

Above example simply elaborates general principle and characteristic of the present utility model, and the utility model is not by above-mentioned implementation Example limitation, on the premise of the spirit and scope of the utility model is not departed from, the utility model also has various change and change, these Changes and modifications are both fallen within claimed the scope of the utility model.The utility model requires protection scope is by appended right Claim defines.

Claims (4)

1. A kind of 1. screw pump stator, it is characterised in that：Including metal stator body, the metal stator body is integral type knot Structure, the metal stator body offer spiral inner chamber along its axial direction, and the spiral inner chamber is provided with 2~3 helixes, and spiral shell Wearing layer is provided with the inwall of medial rotation chamber.
2. A kind of 2. screw pump stator according to claim 1, it is characterised in that：The wearing layer is nitration case.
3. A kind of 3. screw pump stator according to claim 1, it is characterised in that：The thickness of the wearing layer be 0.02~ 0.08mm。
4. A kind of 4. screw pump stator according to claim 1, it is characterised in that：The both ends termination of the metal stator body It is provided with external screw thread.