CN2755267Y

CN2755267Y - Automatic sand washing tubular column

Info

Publication number: CN2755267Y
Application number: CN 200420070298
Authority: CN
Inventors: 项凤义; 荆培文; 李文忠
Original assignee: FUXIN PETROLEUM TOOL WORKS
Current assignee: FUXIN PETROLEUM TOOL WORKS
Priority date: 2004-08-13
Filing date: 2004-08-13
Publication date: 2006-02-01
Anticipated expiration: 2014-08-13

Abstract

The utility model belongs to an oilfield tool under a well in an oil field, particularly to a sand scouring technology for oil wells and water wells in an oil field. The utility model solves the problem that the a pipe column is jammed because the pipe column moves at a well mouth to make the sand fall off. An automatic sand scouring pipe column is externally connected with a hoop (1) at the upper end of an oil pipe (4). Threads of the lower end of the automatic sand scouring pipe column are connected with a suspension joint (6), a center pipe (3) is connected in the automatic sand scouring pipe column. A rubber canister (2) is inlaid at the upper end of the center pipe (3), and threads of the lower end of the center pipe (3) are connected with a pen tip type sand scouring head (5). The lower part of the pen tip type sand scouring head (5) is a one-way inclined opening. The working temperature of the utility model is less than or equals to 120 DEG C, and the working pressure of the utility model is 3MPa. The utility model is suitable for automatically scouring the sand of the sleeve pipes of the oil wells and the water wells in the oil field.

Description

Automatic sand washing tubing string

Technical field

The utility model belongs to oil field oil recovery anterior cannula sand washing down-hole petroleum tool.

Background technology

At present, state's inner sleeve sand washing process adopts drain line sand washing down, dashes an oil pipe and connects an oil pipe, and operating cost height, waste water resource increase operating cost.

Summary of the invention

The purpose of this utility model is to overcome above technical deficiency, provides a kind of and once transfers at well head, the automatic sand washing tubing string of sand washing automatically.

The utility model task is, the external box cupling in sand washing tubing string oil pipe upper end automatically, the lower end suspension joint that is threaded, in connect central tube, central tube upper end insert packing element, the lower end nib type sand washing head that is threaded, the unidirectional beveled in the lower end of nib type sand washing head.

The utlity model has following characteristics: one, the nib type sand washing head top packing element of sand washing tubing string lower end connection advances to fall automatically with the decline of sand washing face automatically, realizes that oil pipe is finished whole sand washing process next time; Its two, the nib type sand washing head is processed into unidirectional angular cutouts, inserts and follow-up sand face, lower support nib sand washing head utilizes fluid pressure to make sand flow out well head, realizes complete sand washing.

Description of drawings

Specify with example below in conjunction with accompanying drawing.

Fig. 1 shows automatic sand clean out pipe rod structure.

Among the figure, the 1-box cupling; The 2-packing element; The 3-central tube; The 4-oil pipe; 5-nib type sand washing head; The 6-suspension joint

The specific embodiment

With reference to accompanying drawing 1, the external box cupling 1 in top of the oil pipe 4 of automatic sand washing tubing string, the bottom is threaded with suspension joint 6; Central tube 3 top setting-in packing elements 2, the bottom is threaded with nib type sand washing head 5.

The course of work, box cupling 1 is connected with tubing round thread, the automatic sand washing tubing string of the oil pipe band desired location of going into the well, water filling pressurization in oil pipe, liquid flow through packing element 2, central tube 3 are gone out from the unidirectional beveled of nib type sand washing head 6, make sand flow out well head by fluid pressure, after sand washing finished, central tube 3 was articulated on the interior shoulder of suspension joint 6, with carrying on the oil pipe automatic sand clean out pipe cornice was gone out well head.

Technical performance:

120 ℃ of operating temperatures;

Operating pressure 3MPa;

Automatically the sand washing tubing string is applicable to the automatic sand washing of oil well casing.

Claims

1, a kind of automatic sand washing tubing string is characterized in that oil pipe (4) upper end external box cupling (1), the lower end suspension joint (6) that is threaded, in connect central tube (3), central tube (3) upper end insert packing element (2), the lower end nib type sand washing head (5) that is threaded.

2, automatic sand washing tubing string according to claim 1 is characterized in that the unidirectional beveled in lower end of nib type sand washing head (5).