CN201363129Y

CN201363129Y - Inverse flow prevention slotted uniflow sand screen

Info

Publication number: CN201363129Y
Application number: CNU2009200182076U
Authority: CN
Inventors: 张福涛; 车传睿; 赵刚; 杨成金; 郭林园; 王进京; 顾国利; 赵志鹏
Original assignee: Oil Production Technology Research Institute of Sinopec Shengli Oilfield Co
Current assignee: Oil Production Technology Research Institute of Sinopec Shengli Oilfield Co
Priority date: 2009-01-14
Filing date: 2009-01-14
Publication date: 2009-12-16
Anticipated expiration: 2019-01-14

Abstract

An inverse flow prevention slotted uniflow sand screen comprises an external slotted liner, an internal slotted liner, an elastic pre-tightening piece, an upper joint and a lower joint, which is characterized in that the outside between the upper joint and the lower joint is connected with the external slotted liner, and the inside thereof is connected with the internal slotted liner, and the elastic pre-tightening piece is installed on the internal slotted liner. The inverse flow prevention slotted uniflow sand screen has the characteristics of excellent inverse flow prevention effect, automatic inverse flow prevention, long service life and the like, and can be widely applied in the oil exploitation sand control technology.

Description

Slot single current sand screen is told in counnter attack

One, technical field

The utility model relates to the oil exploitation downhole tool, and slot single current sand screen is told in particularly a kind of counnter attack.

Two, background technology

Sand screen is told in existing counnter attack, its structure is the lined pipe of parent tube, its objective is that preventing that reservoir sand is counter tells to well, cause sand bridge or sand to bury, but the counnter attack of this structure is told sand screen and had following shortcoming or deficiency: adopt the mode of closing internal lining pipe when 1. counnter attack is told; 2. close the control and the operation structure structure complexity of internal lining pipe, poor reliability; 3. weak effect is told in counnter attack; 4. the life-span is short; 5. well anti-flushing well difficulty.

Three, summary of the invention

The purpose of this utility model provides a kind of improved counnter attack and tells slot single current sand screen, adopts elasticity preload piece structure, the shortcoming or the deficiency that had both effectively overcome or avoided existing in the above-mentioned prior art, and counnter attack is told effectively again.

Slot single current sand screen is told in counnter attack described in the utility model, comprise outer slotted liner, interior slotted liner, elasticity preload piece, top connection and lower contact, it is characterized in that being externally connected between described top connection and the lower contact outer slotted liner, be internally connected with interior slotted liner, the elasticity preload piece is installed on the interior slotted liner.

Wherein, the slot place of slotted liner in described elasticity preload piece is installed on, its length is slightly larger than the height of slot.Be provided with the annular space of fluid flow between described outer slotted liner, interior slotted liner and the elasticity preload piece.

The utility model has following advantage compared with prior art:

1, adopts elasticity preload piece structure, have check action, effectively prevent counter telling;

2, good reliability is told in counnter attack, and is effective;

3, the life-span is long;

4, well can easily carry out the anti-flushing well operation.

Four, description of drawings

Accompanying drawing is a kind of structural representation of the present utility model

Five, the specific embodiment

Consult accompanying drawing, slot single current sand screen is told in a kind of counnter attack, comprises outer slotted liner 2, interior slotted liner 3, elasticity preload piece 4, top connection 1 and lower contact 5.Be externally connected to outer slotted liner 2 between top connection 1 and the lower contact 5, slotted liner 3 in being internally connected with is equipped with elasticity preload piece 4 on the interior slotted liner 3.

The slot place of slotted liner 3 in elasticity preload piece 4 is installed on, its length is slightly larger than the height of slot.Be provided with the annular space of fluid flow between outer slotted liner 2, interior slotted liner 3 and the elasticity preload piece 4.

Claims

1, slot single current sand screen is told in a kind of counnter attack, comprise outer slotted liner, interior slotted liner, elasticity preload piece, top connection and lower contact, it is characterized in that being externally connected between described top connection and the lower contact outer slotted liner, be internally connected with interior slotted liner, the elasticity preload piece is installed on the interior slotted liner.

2, slot single current sand screen is told in counnter attack according to claim 1, it is characterized in that described elasticity preload piece is installed on the slot place of interior slotted liner, and its length is slightly larger than the height of slot.

3, slot single current sand screen is told in counnter attack according to claim 1, it is characterized in that being provided with between described outer slotted liner, interior slotted liner and the elasticity preload piece annular space of fluid flow.