CN201372777Y

CN201372777Y - Gas anchor type double-filtration impurity sieve tube

Info

Publication number: CN201372777Y
Application number: CN200820232986U
Authority: CN
Inventors: 满文华; 门海英; 贾文辉; 刘俊霞; 刘景斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-26
Filing date: 2008-12-26
Publication date: 2009-12-30
Anticipated expiration: 2018-12-26

Abstract

The utility model relates to a gas anchor type double-filtration impurity sieve tube which comprises an upper connector, an inner filter tube, an outer filter rube, a block plate and a lower connector, and is connected with the lower end of an oil pump. The inner filter tube and the outer filter tube are cylindrical steel tubes; the middle-lower part of the inner filter tube are provided with a plurality of cutting seams which are 1.5 to 2.0mm wide; the middle-upper part of the outer filter tube is provided with a plurality of acclivitous holes with the diameter being one second to one third of that (8 to 10mm) of the prior hole. When a well is washed, hot water can filter large impurities, the cutting seams filter small particles and impurities, so as to achieve double-filtration. When in oil well production, the natural gas in petroleum enters the outer filter tube, and is spread because the diameter of the outer filter tube is large, and the natural gas is separated from the petroleum, floats into the acclivitous holes at the upper part of the outer filter tube, and enters a sleeve. The gas anchor type double-filtration impurity sieve tube has the advantages of good impurity filtering effect, fewer accidents of the oil pump, exploitation of more petroleum, less gas impact because of the degassing function of a gas anchor, and higher oil pumping efficiency.

Description

Gas anchor type double-filtering sieve tube for impurities

Technical field

The utility model relates to the oil development field, specifically a kind of gas anchor type double-filtering sieve tube for impurities.

Background technology

At present, the screen casing that oil exploitation is used is at a steel pipe, a plurality of diameter 8-10 of outside system millimeter eyelet, and it is the passage of fluid turnover.But, in mechanical oil recovery, owing to need heat to wash, contain in the hot wash water jar, impurity such as silt arranged in the aqueduct, in the oil well produced liquid sewage can fouling corrosion oil, sleeve pipe, produce iron rust dirt impurity, because the screen casing eye diameter is big, these impurity can enter in the oil well pump through screen casing along with hot clean-up well water, the piston of wearing and tearing pump, turnover valve, perhaps block the turnover valve, make the pump underproduction or not fuel-displaced.Wash 1000 wells through the every heat of investigation statistics, just have 3 mouthfuls of oil wells not fuel-displaced accident takes place.

Summary of the invention

Task of the present invention is: design a kind of gas anchor type double-filtering sieve tube for impurities, solve impurity along with hot clean-up well water enters in the oil well pump through screen casing, the piston of wearing and tearing pump, turnover valve perhaps block the turnover valve, make the oil well pump underproduction or not fuel-displaced problem, the function of the gas anchor degassing is arranged simultaneously.

The present invention realizes in the following way: gas anchor type dual-flushing impurity screening sieve tube is made up of 1 top connection, 2 inner filtration pipes, 3 outer filter pipes, 4 slots, 5 eyelets, 6 closure plates, 7 lower contacts.Inner filtration pipe 2 is steel pipes cylindraceous, and a plurality of slots 4 of middle and lower part system, slot 4 width are at 1.5-2.0mm, and inner filtration pipe 2 bottoms are with closure plate 6 shutoff.Outer filter pipe 3 is steel pipes cylindraceous, a plurality of oblique eyelets 5 of middle and upper part system, and eye diameter is the 1/2-1/3 of the eye diameter 8-10mm of present practicality.Slot 4 width are less than 1/4 of original eye diameter; less granule foreign can be filtered out; hot wash water enters outer filter pipe through eyelet 5 earlier during well-flushing; impurity particle that will be bigger filters; enter the inner filtration pipe through slot again; with entering in the pump after the little granule foreign filtration, reach most of impurity and do not advance pump, the protection oil well pump.In oil well production, natural gas in the oil of extraction enters in the outer filter pipe, because the big diffusion of diameter of outer filter pipe, natural gas and separated from petroleum and on float to top between the inside and outside filter pipe, inner filtration pipe top does not have slot, and natural gas enters in the sleeve pipe through the oblique eyelet of outer filter pipe.

The beneficial effects of the utility model

1, the slot of inside and outside filter pipe, eye diameter, width are little, have realized that impurity is two to filter, and good filtration effect improves heat and washes quality, reduces the oil well pump fault, many quarrying oil.2, the degasification of gas anchor can reduce gases affect, improves pump efficiency.

Description of drawings

Fig. 1 is the assembling schematic diagram of gas anchor type double-filtering sieve tube for impurities;

Gas anchor type dual-flushing impurity screening sieve tube is made up of 1 top connection, 2 inner filtration pipes, 3 outer filter pipes, 4 slots, 5 eyelets, 6 closure plates, 7 lower contacts.

The specific embodiment

The gas anchor type double-filtering sieve tube for impurities upper end is that top connection (1) is circular steel cylinder, and system internal thread in upper end connects oil well pump bottom oil pipe.The internal and external screw thread that lower end system is outer, internal thread connects inner filtration pipe (2), outer filter pipe (3).Inside and outside filter pipe (2), (3) are steel pipes cylindraceous, the a plurality of slots of inner filtration pipe (2) middle and lower part system (4), slot (4) width is at 1.5-2.0mm, slot (4) is less than 1/4 of original eye diameter, its bottom is closure plate (6) fixedly, closure plate (6) is a plate body, plays the effect of shutoff inner filtration pipe bottom.Closure plate (6) and lower contact top are apart from 30-50mm.The a plurality of oblique eyelets (5) of outer filter pipe (3) middle and upper part system, eyelet (5) diameter is the 1/2-1/3 of present eye diameter 8-10mm, it is the 30-45 degree radially that eyelet (5) is gone up the oblique number of degrees, is convenient to the discharge of natural gas.Outer filter pipe (3) lower inside system internal thread connects lower contact (7) external screw thread, and lower contact (7) is circular steel cylinder, upper end system external screw thread, and system external screw thread in lower end connects the bottom oil pipe.Last lower contact belongs to connector.The internal and external screw thread of top connection lower end is connected with outer, the internal thread of inner filtration pipe, outer filter pipe, and outer filter pipe lower inside internal thread is connected in aggregates with the external screw thread of lower contact.During well-flushing, hot wash water enters in the outer filter pipe through eyelet earlier, and impurity particle that will be bigger filters, and enters the inner filtration pipe through slot again, advances pump again after little granule foreign is filtered out, and reaches impurity and does not advance pump, has just protected oil well pump.

Connected mode; The internal and external screw thread of top connection (1) lower end is connected with outer, the internal thread of inner filtration pipe (2), outer filter pipe (3), the external screw thread of outer filter pipe (3) lower inside internal thread and lower contact (7) links together, and is connected on the oil pipe of oil well pump lower end and gets final product.

Claims

1. gas anchor type double-filtering sieve tube for impurities, by top connection (1), inner filtration pipe (2), outer filter pipe (3), slot (4), eyelet (5), closure plate (6), lower contact (7) is formed, it is characterized in that: top connection (1) is circular steel cylinder, upper end system internal thread connects oil well pump bottom oil pipe, outside the system of lower end, internal thread connects inner filtration pipe (2), in the outer filter pipe (3), external screw thread, inside and outside filter pipe (2), (3) be steel pipe cylindraceous, the a plurality of slots of inner filtration pipe (2) middle and lower part system (4), slot (4) width is at 1.5-2.0mm, its bottom is closure plate (6) fixedly, closure plate (6) is a plate body, closure plate (6) and lower contact top are apart from 30-50mm, the a plurality of oblique eyelets (5) of outer filter pipe (3) middle and upper part system, eyelet (5) diameter is the 1/2-1/3 of present eye diameter 8-10mm, it radially is the 30-45 degree that eyelet (5) is gone up the oblique number of degrees, outer filter pipe (3) lower inside system internal thread connects lower contact (7) external screw thread, lower contact (7) is circular steel cylinder, upper end system external screw thread, system external screw thread in lower end connects the bottom oil pipe.