CN201363130Y - Gas anchor type double-flushing and double-filtering impurity sieve tube - Google Patents

Abstract

The utility model provides a gas anchor type double-flushing and double-filtering impurity sieve tube consisting of an upper joint, a lower joint, a central tube, a wire winding sieve tube, an outer filter tube and a closure plate, a plurality of grooves are formed at the bottom of the central tube, the bottom surface is sealed by the closure plate, the wire winding sieve tube is sleeved on an inner central tube, a plurality of notches are formed at the upper part of the outer filter tube, and the components are connected through the upper and the lower joints. During well washing, hot washing water can be sprayed on two sieve surfaces to prevent impurities from depositing on the sieve surfaces, thereby achieving the purpose of double filtering and double cleaning causing no screen cut clog. During oilwell production, after being separated from oil, natural gas floats to the notches at the upper part of the outer filter tube and enters a bushing. The utility model has the advantages of achieving good tiny impurity filtering effect, reducing oil-well pump accident, recovering more oil, acting the functions of gas anchor degasification to diminish gas influence, and improving efficiency of oil-well pumps.

Description

Gas anchor type dual-flushing impurity screening sieve tube

The invention discloses a kind of gas anchor type dual-flushing impurity screening sieve tube.

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, 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 dual-flushing impurity screening sieve tube, 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 utility model is realized in the following way: gas anchor type dual-flushing impurity screening sieve tube is made up of top connection 1, central tube 2, wire-wrapped screen 3, outer filter pipe 4, sieve seam 5, groove 6, notch 7, closure plate 8, lower contact 9.Central tube 2 is steel pipes cylindraceous, and the higher authorities are connected with top connection 1 lower inside, a plurality of grooves 6 of bottom system, bottom surface closure plate 8 shutoff, wire-wrapped screen 3 is commercially available products, is twined by a lot of steel wire to be welded on the skeleton, the slit is arranged between the steel wire, and wire-wrapped screen 3 is sleeved on the inner central tube.Outer filter pipe 4 is steel pipes cylindraceous, the a plurality of notches of top system (7), the wide 100-140*4-6-mm of notch (7) flute length * can fall the larger particles contaminant filter, hot wash water enters in the outer filter pipe through notch 7 earlier during well-flushing, impurity particle that will be bigger filters, current by outer filter pipe and wire-wrapped screen to dirty, part flows between wire-wrapped screen and the central tube 2 and continues downwards through sieve seam 5 and flows, two compass screen surfaces have just been washed away in the hot wash water flow process, make impurity be difficult for being deposited on the compass screen surface, reach two filtrations, two cleaning, make and can not stop up the sieve seam.The groove 6 of process central tube lower end enters in the pump after entering in the central tube again, reaches fine impurity and does not advance pump, and the protection oil well pump is avoided impurity wearing and tearing evil.In oil well production, natural gas in the oil of extraction enters in the outer filter pipe, because the big diffusion of outer filter pipe diameter, natural gas and separated from petroleum float to inner filtration pipe top on also, 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

1.1. realized impurity from the stratum, ground, pit shaft filters entirely, filter effect is good, special compass screen surface cleans the runner design makes screen casing be difficult for stopping up, and improves heat and washes quality, reduces impurity and advances the failure of pump that pump causes, many quarrying oil.2, can reduce gases affect, improve pump efficiency.

Description of drawings

Fig. 1 is the assembling schematic diagram of gas anchor type dual-flushing impurity screening sieve tube;

Gas anchor type dual-flushing impurity screening sieve tube is made up of top connection (1), central tube (2), wire-wrapped screen (3), outer filter pipe (4), sieve seam (5), groove (6), notch (7), closure plate (8), lower contact (9).

The specific embodiment

The gas anchor type dual-flushing impurity screening sieve tube 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, and lower end system is outer, internal thread connects outer filter pipe (4), central tube (2) internal and external screw thread.Central tube (2) is a steel pipe cylindraceous, and system external screw thread in upper end is connected with top connection (1) lower inside internal thread, central tube (2) bottom system a plurality of grooves (6), the wide 80-100*20-40mm of long * of groove (6) groove, bottom surface closure plate (8) shutoff, closure plate (8) is a plate body, plays plugging action.Closure plate (8) and lower contact end face distance 30-50mm.Wire-wrapped screen (3) is commercially available product, twines by a lot of triangular wire to be welded on the skeleton, and between the steel wire sieve seam (5), sieve seam (5) slit is at 0.3-0.5mm, and wire-wrapped screen (3) is sleeved on the central tube.Outer filter pipe (4) is a steel pipe cylindraceous, many emissions grooves of upper end system mouth (7), the wide 140*6mm of long * of notch (7) groove.Two ends inboard system internal thread is connected with last lower contact external screw thread respectively.Lower contact (9) is circular steel cylinder, upper end system external screw thread, and system external screw thread in lower end connects the bottom oil pipe.Top and the bottom joint (1), (9) belong to connector.Hot wash water enters in the outer filter pipe (3) through notch (7) earlier during well-flushing, and impurity particle that will be bigger filters, and passes through slot (4) again and enters inner filtration pipe (5), enters in the pump after fine impurity is filtered, and reaches impurity and does not advance pump, the protection oil well pump.

Connected mode: wire-wrapped screen is fixed on the central tube outside, and central tube is connected the top connection lower end, and upper and lower joint two ends are connected with outer filter pipe and get final product.

Claims (1)

1. gas anchor type dual-flushing impurity screening sieve tube is by top connection (1), central tube (2), wire-wrapped screen (3), outer filter pipe (4), sieve seam (5), groove (6), notch (7), closure plate (8), lower contact (9) is formed, it is characterized in that: the upper end is that top connection (1) is circular steel cylinder, upper end system internal thread connects oil well pump top oil pipe, outside the system of lower end, internal thread connects outer filter pipe (4), in the central tube (2), external screw thread, central tube (2) is a steel pipe cylindraceous, upper end system external screw thread is connected with top connection (1) lower inside internal thread, central tube (2) bottom system a plurality of grooves (6), the wide 80-100*20-40mm of long * of groove (6) groove, bottom surface closure plate (8) shutoff, closure plate (8) is a plate body, closure plate (8) has 30-50mm with lower contact upper surface distance, wire-wrapped screen (3) is commercially available product, be welded on the skeleton by the winding of a lot of triangular wire, it between the steel wire sieve seam (5), sieve seam (5) slit is at 0.3-0.5mm, wire-wrapped screen (3) is sleeved on the central tube, outer filter pipe (4) is a steel pipe cylindraceous, upper end system many emissions grooves mouth (7), the wide 140*6mm of long * of notch (7) groove, two ends inboard system internal thread is connected with last lower contact external screw thread respectively, lower contact (9) is circular steel cylinder, upper end system external screw thread, system external screw thread in lower end connects the bottom oil pipe.

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