CN203835346U - Underground grit separator - Google Patents

Abstract

The utility model relates to the technical field of oil field producing well sand prevention tools and particularly to an underground grit separator. The underground grit separator comprises an upper connector, an external pipe, a core pipe and a lower connector; the upper connector and the lower connector are connected through the external pipe; the core pips is connected to the upper connector; a forward rotation piece and a reverse rotation piece are arranged between the exterior of the core pipe and the interior of the external pipe. According to the underground grit separator, sand and mud are arranged on the internal wall of the external pipe due to the forward and reverse centrifugal effect and the core pipe sucks oil free from sand and mud from the middle portion to reduce sand and mud influences to an oil well pump. The underground grit separator has the advantages of being good in effect for oil filed producing oils which are for separating sand and slurry and increasing the service life of the oil pump.

Description

Downhole sand removing device

Technical field

The utility model relates to oil well sand preventing tool technical field, particularly: downhole sand removing device.

Background technology

At present, oil well sand control shakes out and adopts traditional sand anchor desanding effect bad, is especially shaking out and the well that goes out mud, and sand anchor is substantially inoperative, causes wear-resistant initial failure, has affected the application life of oil well pump.

Summary of the invention

Goal of the invention of the present utility model has been to provide one: downhole sand removing device, and in order to address the above problem,

This downhole sand removing device integrates the instrument of desanding, mud.

A kind of downhole sand removing device, comprises top connection, outer tube, core pipe and lower contact; Described top connection and lower contact link together by outer tube, and described core pipe is connected in top connection; It is characterized in that: between described core pipe outside and outer tube inside, establish and be rotated in the forward sheet and reverse rotation sheet.

The described sheet that is rotated in the forward is located at the upper end that counter-rotates sheet.

Described core pipe bottom is undergauge.

In described outer tube upper portion side wall, be designed with inlet opening.

The top of described lower contact is horn-like.

The utility model downhole sand removing device, by forward and reverse centrifugal action, allows sand and mud in outer tube wall position, and core pipe the not fluid suction containing sand and mud, reduces the impact on oil well pump of sand and mud from middle part.

The beneficial effects of the utility model:

The utility model downhole sand removing device is for the well that goes out sand, mud in oil well, and effect is good especially, has increased the application life of oil pump.

The course of work of the present utility model and principle:

When silt particle is from outer tube inlet opening enters, at dextrorotation rotor, under the effect of oil pump centrifugal force, sand and mud, in the up-downgoing of outer tube inside wall, are not positioned at core tube wall position containing the fluid of silt particle.When through reverse rotation when sheet, under the effect of reverse centrifugal force, silt particle once accelerates the effect of centrifugal force again, makes silt particle in fluid all on outer tube inside wall, enters dead band, bottom no longer up.Now, the fluid of core tube wall enters core pipe inside by undergauge, then enters oil well pump extraction.

Brief description of the drawings

Fig. 1 is the structure sectional schematic of the utility model embodiment.

Wherein: 1-top connection; 2-outer tube; 3-core pipe; 4-is rotated in the forward sheet; 5-counter-rotates sheet; 6-lower contact.

2-1-inlet opening; 3-1-core pipe bottom undergauge; 6-1-lower contact top horn-like.

Detailed description of the invention

With reference to the accompanying drawings the utility model is further described below:

As shown in Figure 1

A kind of downhole sand removing device, comprises top connection 1, outer tube 2, core pipe 3, is rotated in the forward sheet 4, counter-rotates sheet 5 and lower contact 6; Described top connection 1 shown in figure links together by outer tube 2 with lower contact 6, is connected with core pipe 3 in top connection 1; Between described core pipe 3 outsides and outer tube 2 inside, be provided with and be rotated in the forward sheet 4 and reverse rotation flight 5.

Described in shown in Fig. 1, be rotated in the forward sheet 4 and be located at reverse rotation flight 5 upper ends.

3 bottoms of described core pipe shown in Fig. 1 are undergauge 3-1.

Shown in Fig. 1, in described outer tube 2 upper portion side wall, be designed with inlet opening 2-1.

Shown in Fig. 1, the top of described lower contact 6 is horn-like.

Claims (5)

1. a downhole sand removing device, comprises top connection, outer tube, core pipe and lower contact; Described top connection and lower contact link together by outer tube, and described core pipe is connected in top connection; It is characterized in that: between described core pipe outside and outer tube inside, establish and be rotated in the forward sheet and reverse rotation sheet.

2. downhole sand removing device according to claim 1, is characterized in that, described in be rotated in the forward sheet be located at reverse rotation sheet upper end.

3. downhole sand removing device according to claim 1, is characterized in that, described core pipe bottom is undergauge.

4. downhole sand removing device according to claim 1, is characterized in that, in described outer tube upper portion side wall, establishes inlet opening.

5. downhole sand removing device according to claim 1, is characterized in that, the top of described lower contact is horn-like.