CN2871832Y

CN2871832Y - Stratified water-ejecting tubular column with ground controlling and well washing functions

Info

Publication number: CN2871832Y
Application number: CN 200620082389
Authority: CN
Inventors: 车传睿; 董贤勇; 王民轩; 王进京; 郭林园; 姜国良; 顾国利; 张雪梅; 申兴哲; 杨成金; 马英; 张福涛
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: 2006-03-26
Filing date: 2006-03-26
Publication date: 2007-02-21
Anticipated expiration: 2016-03-26

Abstract

The utility model discloses a ground control type stratified water injection string used for well flushing, which comprises an oil pipe, a packer connected with the upper part of the oil pipe and a distributing valve, the oil pipe column is connected with an upper packer, an upper distributing valve, a lower packer, a lower distributing valve and a backflushing valve from top to bottom in turn, the upper packer and the lower packer are provided with a control pipeline. The utility model has the advantages of the stratified water injection, the backflushing well and the ground control sealing etc, which can be used extensively in oil water injection process.

Description

Ground control type washing well separate layer water injection string

One, technical field

The utility model relates to oil exploitation laminated distributor under well water injection string, particularly a kind of ground control type washing well separate layer water injection string.

Two, background technology

Existing separate layer water injection string constitutes owing to have the well-flushing passage and the injection well downhole flow regulator of tubing pressure control on the packer, can anti-circulation well cleanup, but the shortcoming or the deficiency that exist are: 1. the well-flushing passage on the packer easily stops up, and causes operation; 2. the flushing valve time of controlling the well-flushing passage has been grown and has been not closed completely, and causes layered effect poor.

Three, summary of the invention

The purpose of this utility model provides a kind of improved ground control type washing well separate layer water injection string, and shortcoming or deficiency that it can overcome effectively or avoid existing in the above-mentioned prior art are carried out anti-flushing well operation and seperated layer water injection effectively.

Ground control type washing well separate layer water injection string described in the utility model, comprise oil pipe and go up packer, the water distribution valve that connects, described tubing string is connected with upper packer from top to bottom in turn, last water distribution valve, lower packet, following water distribution valve and backwash valve are installed on the control pipeline on the described upper and lower packer.

Wherein, described control pipeline be connected in be provided with in the top connection of upper and lower packer with its central tube and packing element between on the connecting hole that is connected of annular space.The junction of described control pipeline and described connecting hole is installed on seal and presses nail.

The utility model has following advantage compared with prior art:

1, realizes seperated layer water injection, improve water-injection efficiency;

2, the packer duty is controlled by surface line, and anti-flushing well is undertaken by different duties with the packing stratum, and reliability improves greatly.

Four, description of drawings

Fig. 1 is the utility model structural representation,

Fig. 2 is by control pipeline and packer syndeton schematic diagram shown in Figure 1,

Fig. 3 is for pressing the local enlarged diagram in control pipeline shown in Figure 1 and packer junction.

Five, the specific embodiment

Consult accompanying drawing, a kind of ground control type washing well separate layer water injection string, comprise oil pipe 2 and go up

packer

3,5, the

water distribution valve

4,6 that connects, described tubing string 2 is connected with fluid power switching valve 17, upper packer 3 from top to bottom in turn, last water distribution valve 4, lower packet 5, following water distribution valve 6 and backwash valve 7 are installed on control pipeline 8 on the described upper and

lower packer

3,5.

Control pipeline 8 be connected in be provided with in the top connection 9 of upper and

lower packer

3,5 with its central tube 11 and packing element 10 between on the connecting hole 16 that is connected of annular space.Described control pipeline 8 is installed on seal 13 and presses nail 12 with the junction of described connecting hole.By of seat envelope, deblocking and the anti-flushing well operation of control pipeline by the Ground Control packer.Upper and

lower packer

3,5 is connected on the oil pipe 2, is lowered in the sleeve pipe 1.Upper packer 3 is lowered to oil reservoir 14 top positions, and lower packet 5 is lowered to oil reservoir 14 and oil reservoir 15 centre positions.

Claims

1, a kind of ground control type washing well separate layer water injection string, comprise oil pipe and go up packer, the water distribution valve that connects, it is characterized in that described tubing string is connected with upper packer from top to bottom in turn, last water distribution valve, lower packet, following water distribution valve and backwash valve all are installed on the control pipeline on the described upper and lower packer.

2, ground control type washing well separate layer water injection string according to claim 1, it is characterized in that described control pipeline be connected in be provided with on the upper and lower joint of upper and lower packer with its central tube and packing element between on the connecting hole that is connected of annular space.

3, ground control type washing well separate layer water injection string according to claim 2 is characterized in that the junction of described control pipeline and described connecting hole is installed on seal and presses nail.