CN2900778Y

CN2900778Y - Non-return type bias water distributor

Info

Publication number: CN2900778Y
Application number: CN 200620025777
Authority: CN
Inventors: 高法会; 常会军; 刘存辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-11
Filing date: 2006-04-11
Publication date: 2007-05-16
Anticipated expiration: 2016-04-11

Abstract

The utility model relates to a non-return eccentric water service machine for injection well tubing string of oil well, which is an improved down-well device. The utility model comprises a dispensing spout and a non-return body. As the one-way non-return action of non-return balls is happened in the body, the down-draught of the formation water into the oil pipe is solved, and the tubing string block which is caused by the down-draught of the water from high pressure layer to low pressure layer. The utility model is characterized in that structure is simple, technology is reliable, adaptation is high, and water service machine is good for down-draught-proof and sand-blocking-proof of the tubing string.

Description

The non-return eccentric injection mandrel

Technical field

The utility model relates to a kind of water dispensing apparatus of water injection well in oil fields separate injection tubing string.

Background technology

Because each section pressure difference of water injection well is bigger, so carry out segmentation water distribution quantitative injection.Traditional separate injection tubing string exists anti-flow problem at present, owing to causing the phenomenon of stopping annotating, reasons such as termination of pumping often take place, thereby cause sand output well high pressure section water to chew toward low pressure stage and pour in down a chimney by injection well downhole flow regulator water, destroyed the equilibrium pressure of dispensing, cause that the stratum tells sand card tubing string, the be benefited flood effectiveness of well of influence.

Solve water injection well high-low pressure interlayer interference and pour in down a chimney the problem of telling sand card tubing string, also do not have special-purpose device and effective way at present.

Summary of the invention

The purpose of this utility model is under the state that does not change former separate layer water injection string, and a cover non-return water dispensing apparatus is provided, and it can prevent effectively that water injection well high pressure zone water from pouring in down a chimney the problem of telling sand to the low pressure layer.

The purpose of this utility model is achieved in that this device chews seat by check ball and non-return passage and water and form, and when the pressure in the oil pipe during greater than external pressure, check ball overcomes the active force of spring, and non-return passage is communicated with delivery port; When the pressure in the oil pipe during less than external pressure, check ball returns passage in effect ShiShimonoseki apolipsis of spring, plays the effect of sealing non-return, thereby the stratum can not take place pours in down a chimney the phenomenon of telling sand.

The utility model is a kind of downhole tool of water injection well separate injection tubing string combination accessory, uses throw in catcher to chew water distribution water and tests water distribution, without any special requirement; Because the choked flow effect between check ball and the non-return passage is poured in down a chimney the requirement of telling sand so realize preventing the water injection well stratum easily.

Description of drawings

Fig. 1 is according to the sectional drawing that the utility model proposes.

The specific embodiment

This device comprises the water dispensing apparatus that is applicable to the water injection well in oil fields dispensing, it is a kind of improved downhole tool, it is chewed by water distribution water and the non-return main body constitutes, because check ball plays unidirectional non-return effect in main body, avoided formation water to pour in down a chimney the generation of phenomenon, solved because of formation water and poured in down a chimney the problem of telling the separate injection tubing string card that sand causes to oil pipe; Be characterized in: simple in structure, technical performance is reliable, and compliance is strong, is that separate injection tubing string prevents effective water dispensing apparatus that high pressure zone water pours in down a chimney to the low pressure layer.

This device has solved the water injection well in oil fields stratum effectively and has poured in down a chimney the card tubing string problem of telling sand; Economic benefit is obvious, can extensively be applied in the oil field.

Claims

1, the check device on the separate injection tubing string, this device have check ball (2), check spring (4) and non-return passage (3), and its characteristics are that check ball (2) cooperates with check spring (4), and non-return passage (3) is in the non-return state under the effect of check ball (2).

2, water distribution check device according to claim 1, it is characterized in that: check ball (2) is chewed seat (1) by non-return passage (3) and water and is communicated with, when eccentric injection mandrel internal pressure during greater than external pressure, inject water water in injection well downhole flow regulator and chew seat (1), check ball (2) overcomes the active force of spring (4) and opens, non-return passage (3) is communicated with delivery port (5), and when the injection well downhole flow regulator internal pressure was lower than external pressure, check ball (2) sealed non-return passage (3) under spring (4) effect.