CN203050667U - Filter device for sewage exploited from water injection well in oilfield development - Google Patents

Abstract

The utility model relates to a filter device for producing sewage from water injection wells for oil field development. The method mainly solves the problem in the prior art that the sewage containing a large amount of impurities is reinjected into the downhole formation and seriously affects the middle and later stage development of the oil field. It is characterized in that: the inside of the tank (2) is sequentially equipped with a steel mesh (3), a support plate (6), and a filter plate (8); the support plate (6) is provided with a filter material layer ( 4); the tank wall between the support plate (6) and the filter plate (8) is equipped with an air inlet pipe (5) and a blind plate (7); the outlet pipe (10) has a built-in filter screen (11) to filter Valve (12) is connected on the outlet pipe (10) of net (11) bottom. The oilfield developed a water injection well production sewage filtration device, which can remove a large amount of impurities in the sewage of the oil-water mixture, and has a good filtration effect.

Description

Oilfield development water injection well production sewage filtration device

technical field

The utility model relates to a filter device in the field of oil and gas well development, in particular to a filter device for producing sewage from water injection wells in oil field development.

Background technique

Most of my country's oil fields have entered the middle and late stages of oil exploitation, and the sewage content in the produced liquid of crude oil reaches 70-80%, and some oil fields even reach as high as 90%. When performing water injection operations on these oil wells, from the perspective of water saving and environmental protection, the treated sewage in the produced fluid is usually injected back into the oil wells. The oil-water mixture sewage pumped out from the well contains a large amount of impurities. When the sewage containing a large amount of impurities is reinjected into the downhole formation, after a period of operation, the impurities will gradually accumulate in the rock formation, which will affect the water injection volume, and finally make the rock formation completely blocked, failing to achieve the purpose of water injection and oil displacement, and even water injection The operation cannot be carried out at all, seriously affecting the middle and late stage development of the oil field.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the problem in the background technology that the sewage containing a large amount of impurities is reinjected into the downhole stratum and seriously affects the development of the oil field in the middle and later stages, and to provide a sewage filter device for the production of water injection wells for oil field development. The development of sewage filtration devices produced by water injection wells can remove a large amount of impurities in the sewage of oil-water mixtures, and the filtration effect is good.

The utility model can solve the problem through the following technical solutions: the oil field development water injection well production sewage filter device includes a tank body, the top and bottom of the tank body are respectively provided with a water inlet pipe and a water outlet pipe, and the bottom is provided with a sewage outlet. The inside of the tank is equipped with steel mesh, support plate and filter plate in sequence from top to bottom; there are holes on the filter plate, and a filter material layer is placed on the support plate; an air inlet pipe is installed on the tank wall between the support plate and the filter plate , Blind plate; said outlet pipe is built with a filter screen, and the outlet pipe at the bottom of the filter screen is connected with a valve. the

Compared with the above-mentioned background technology, the utility model can have the following beneficial effects: due to the adoption of the above-mentioned structure in the oil field development water injection well production sewage filter device, the sewage enters the tank body through the water inlet pipe, and the large pieces of dirt first go out through the steel mesh, and then pass through After the filter material layer is filtered, the outlet pipe is discharged, and the filter screen and filter plate installed in the outlet pipe are used to filter the filter material carried in the sewage and reuse it; the fine impurity sewage liquid falls through the filter plate into the lower part and is discharged through the sewage outlet; the support plate The space between the filter plate and the filter plate is used to store filtered and settled impurities. When the filter layer is blocked or there are many impurities stored in the lower space, compressed air can be introduced through the intake pipe to recoil the filter material layer. The utility model has the advantages of simple structure, convenient operation, good filtering effect and convenient maintenance, which greatly improves the quality of water injection.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model.

In the figure: 1-water inlet pipe, 2-tank body, 3-steel mesh, 4-filter material layer, 5-intake pipe, 6-support plate, 7-blind plate, 8-filter plate, 9-drain outlet, 10 -Outlet pipe, 11-filter, 12-valve, 13-flange, 14-collection pipeline.

Detailed ways

The utility model will be further described below in conjunction with accompanying drawing:

As shown in accompanying drawing 1, this oil field development water injection well production sewage filtering device comprises a tank body 2, the top and bottom of the tank body 2 are respectively provided with a water inlet pipe 1 and a water outlet pipe 10, and a sewage outlet 9 is provided at the bottom. The body 2 is equipped with a steel mesh 3, a support plate 6, and a filter plate 8 sequentially from top to bottom; the filter plate is an arc-shaped surface with an opening downward, and a filter layer 4 is placed on the support plate 6; Intake pipe 5 and blind plate 7 are housed on the tank body wall between 8; Filter screen 11 is built in in described outlet pipe 10, and valve 12 is connected on the outlet pipe 10 of the bottom of filter screen 11; The filtration of described outlet pipe 10 The front of the net 11 is connected with a collection pipeline 14, and the upper and bottom of the collection pipeline 14 are connected with a valve and a flange 13. The filter material filtered in the outlet pipe 10 is deposited in the collection pipeline 14, and the flange 13 is opened to discharge the filter material. , reused.

During use, the sewage enters the tank body through the water inlet pipe 1, first removes large pieces of dirt through the steel mesh, and then is filtered through the filter material layer 4 and then discharged from the outlet pipe 10. The outlet pipe 10 is equipped with a filter 11, the filter 11 and the filter. The plate 8 is used to filter the filter material carried in the sewage and reuse it; the fine impurity dirty liquid falls through the filter plate 8 to the lower part and is discharged through the sewage outlet 9, and the space between the support plate 6 and the filter plate 8 is used to store the filtered and settled impurities , when the filter plate is blocked or there are many impurities stored in the lower space, compressed air can be introduced through the intake pipe 5 to recoil the filter material layer 4, and the impurities will be discharged through the sewage outlet, and normal filtering operation can be carried out.

Claims (2)

1. oil field development water injection well extraction sewage filter device, comprise tank body (2), tank body (2) top and bottom are respectively arranged with water inlet pipe (1) and outlet pipe (10), the bottom is provided with sewage draining exit (9), and it is characterized in that: described tank body (2) inside is equipped with steel mesh (3), gripper shoe (6), filter (8) from top to bottom successively; Be equipped with filter material layer (4) on the gripper shoe (6); Air inlet pipe (5), blind plate (7) are housed on the tank wall between gripper shoe (6) and filter (8); Described outlet pipe (10) is built-in with screen pack (11), is connected to valve (12) on the outlet pipe (10) of screen pack (11) bottom.

2. oil field development water injection well extraction sewage filter device according to claim 1, it is characterized in that: screen pack (11) front portion of described outlet pipe (10) is connected to gathering line (14), and the top of gathering line (14) and bottom are connected with valve and flange (13).

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