CN212998672U

CN212998672U - Water injection filter for water injection well of oil field

Info

Publication number: CN212998672U
Application number: CN202021262055.7U
Authority: CN
Inventors: 王志荣; 刘冬林
Original assignee: Yangzhou Right Petroleum Machinery Co ltd
Current assignee: Yangzhou Right Petroleum Machinery Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-04-20
Anticipated expiration: 2030-07-01

Abstract

Oil field water injection well water injection filter. Relates to the technical field of oil extraction equipment. The sewage filter comprises an outer pipe, an inner pipe and a filter pipe, wherein one end of the outer pipe is provided with an outlet joint, the other end of the outer pipe is provided with a sewage discharge joint, and the outer wall of the outer pipe is also provided with an inlet joint; the inner tube is the thick I shape in middle part in both ends, the middle part of inner tube is equipped with a plurality of logical grooves, lead to the outer wall that the axial of groove edge inner tube extends and runs through the middle part of inner tube, the both ends of inner tube all are equipped with a sealed head, and the filter tube cover is established the outside of inner tube, and it is a pair of just be located between the sealed head, the filter tube with the inner tube makes up into and filters the assembly, filter the assembly and locate in the outer tube, the outlet joint with blowdown connects the centre gripping, and is fixed filter the assembly. The utility model discloses have compact structure on the whole, filter reliable characteristics.

Description

Water injection filter for water injection well of oil field

Technical Field

The utility model relates to an oil recovery equipment technical field, concretely relates to oil field water injection well water injection filter.

Background

The oil field water injection well, namely the well that is used for to the oil reservoir water injection, in the oil field development process, through special water injection well with water injection into the oil reservoir, keep or resume oil reservoir pressure, make the oil reservoir have stronger drive power to improve the exploitation speed and the recovery ratio of oil reservoir.

At present, in an oil field adopting a water injection oil extraction process, high-pressure water subjected to purification treatment needs to be used, the purification work is usually performed in a water injection pump station, but when purified water is conveyed to a wellhead in a long distance, impurities are possibly mixed in the purified water, so that a special filter needs to be designed for filtering, and the purity of the high-pressure water is ensured.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a compact structure filters reliable oil field water injection well water injection filter.

The utility model discloses a following technical scheme realizes: the water injection filter for the water injection well in the oil field comprises an outer pipe, an inner pipe and a filter pipe, wherein one end of the outer pipe is provided with an outlet joint, the other end of the outer pipe is provided with a sewage discharge joint, and the outer wall of the outer pipe is also provided with an inlet joint;

the inner tube is the thick I shape in middle part in both ends, the middle part of inner tube is equipped with a plurality of logical grooves, lead to the outer wall that the axial of groove edge inner tube extends and runs through the middle part of inner tube, the both ends of inner tube all are equipped with a sealed head, and the filter tube cover is established the outside of inner tube, and it is a pair of just be located between the sealed head, the filter tube with the inner tube makes up into and filters the assembly, filter the assembly and locate in the outer tube, the outlet joint with blowdown connects the centre gripping, and is fixed filter the assembly.

The one end of sealed head towards the filter tube is equipped with the overlap, the overlap crimping is in on the outer wall of filter tube, be equipped with a plurality of through-holes on the filter tube, the filter screen has all been laid on the inner wall of filter tube and the outer wall, the mesh diameter of filter screen is less than the diameter of through-hole.

The inner pipe is provided with a first cavity and a second cavity which are not communicated with each other, the outer wall of the second cavity is provided with at least one pair of sewage outlets, and the sewage outlets are communicated with the interiors of the second cavity and the outer pipe.

And the outlet joint, the inlet joint and the sewage discharge joint are all connected with pipelines with valves, and the valves control the opening and closing of the pipelines.

The both ends of outer tube all are connected through screw thread and outlet joint and blowdown joint, all be equipped with the sealing washer between the one end of outer tube and the outlet joint and between the other end of outer tube and the blowdown joint.

Compared with the prior art, the utility model has the advantages that in the work, high-pressure water containing impurities enters the outer pipe from the inlet joint, after being filtered by the filter pipe, the impurities are removed, the high-pressure water enters the inner pipe through the groove and is discharged from the inner pipe through the outlet joint, the high-pressure water is filtered, the structure is reasonable, and the filtering effect is reliable; meanwhile, the back washing of the filter pipe is realized by the water inlet of the outlet joint, the service life of the filter pipe is prolonged, and the filtering effect is ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a filter assembly;

in the figure: 1. an outer tube; 2. an inner tube; 21. a through groove; 22. a partition plate; 23. a first chamber; 24. a second chamber; 240. a sewage draining outlet; 3. a filter tube; 4. an outlet fitting; 5. a blowdown joint; 6. an inlet fitting; 7. a sealing head; 70. flashing; 8. and (5) sealing rings.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1-2, the water injection filter for the water injection well in the oil field comprises an outer pipe 1, an inner pipe 2 and a filter pipe 3, wherein one end of the outer pipe 1 is provided with an outlet joint 4, the other end of the outer pipe is provided with a sewage discharge joint 5, and the outer wall of the outer pipe 1 is also provided with an inlet joint 6;

inner tube 2 is the thin I shape in thick middle part in both ends, the middle part of inner tube 2 is equipped with a plurality of logical grooves 21, lead to the outer wall that groove 21 extends along the axial of inner tube 2 and runs through the middle part of inner tube 2, the both ends of inner tube 2 all are equipped with a sealed head 7, and 3 covers of filter tube are established the outside of inner tube 2, and be located a pair of between the sealed head 7, filter tube 3 with inner tube 2 makes up into and filters the assembly, it locates to filter the assembly in the outer tube 1, outlet joint 4 with 5 centre gripping of blowdown joint, and fixed filter the assembly. The inlet joint 6 and the outlet joint 4 are in an open state, the sewage discharge joint 5 is in a closed state, high-pressure water containing impurities enters the outer pipe 1 from the inlet joint 6, is filtered by the filter pipe 3, is removed of the impurities, enters the inner pipe 2 through the through groove 21, and is discharged from the inner pipe 2 through the outlet joint 4, so that the high-pressure water is filtered, the structure is reasonable, and the filtering effect is reliable; after the filter pipe 3 runs for a period of time, a large amount of impurities can be adhered to the filter pipe 3, the water outlet speed and the filtering effect are affected, at the moment, water inflow is stopped, the outlet joint 4 and the sewage discharge joint 5 are in an open state, the inlet joint 6 is in a closed state, high-pressure water without impurities is input into the inner pipe 2 from the outlet joint 4, the high-pressure water can impact the impurities attached to the surface of the filter pipe 3, the impurities are separated from the position between the filter pipe 3 and the outer pipe 1 and then discharged from the sewage discharge interface, back washing of the filter pipe 3 is achieved, the service life of the filter pipe 3 is prolonged, and the filtering effect is guaranteed.

The one end of sealed head 7 towards filter tube 3 is equipped with overlap 70, overlap 70 crimping is in on the outer wall of filter tube 3, be equipped with a plurality of through-holes on the filter tube 3, the filter screen has all been laid on the inner wall of filter tube 3 and the outer wall, the mesh diameter of filter screen is less than the diameter of through-hole. The outer surface of the flash 70 can be provided with a screw, so that the screw penetrates through the flash 70 and the filter pipe 3 and is locked on the outer wall of the inner pipe 2, thus the flash 70 reliably compacts the filter pipe 3, the connection strength of the filter pipe 3 on the inner pipe 2 is improved, and meanwhile, under the combined action of the sealing head 7, high-pressure water is effectively prevented from directly entering the inner pipe 2 from a gap at the joint of the filter pipe 3 and the inner pipe 2, all high-pressure water can be discharged after being filtered, and the filtering reliability is ensured; the two layers of filter screens are arranged, so that the filtering effect is effectively improved, the effect of intercepting impurities is achieved, when backwashing is facilitated, high-pressure water for cleaning the impurities can completely remove the impurities between the two layers of filter screens, and excessive impurities are prevented from being adsorbed on the inner wall of the outer pipe 1; optimally, the mesh diameter of the filter screen on the outer wall of the filter pipe is larger than that of the filter screen on the inner wall of the filter pipe, so that a large amount of impurities with smaller particle sizes can be intercepted between the two layers of filter screens, the impurities with larger particle sizes and smaller particle sizes are prevented from being intercepted between the filter screens on the outer pipe and the outer wall of the filter pipe, namely, the impurities are intercepted in a grading way, the impurities are prevented from being accumulated completely and adhered to the inner wall of the outer pipe, the difficulty of backwashing is reduced, and all the impurities can be removed during backwashing.

The one end intercommunication blowdown of inner tube 2 connects 5, other end intercommunication outlet joint 4, the inside baffle 22 that is equipped with of one end of inner tube 2, baffle 22 separates the one end of inner tube 2 for the first cavity 23 and the second cavity 24 that do not communicate with each other, seted up at least a pair of drain 240 on the outer wall of second cavity 24, drain 240 communicates the inside of the second cavity 24 and outer tube 1. The first chamber 23 is communicated with the inner pipe 2, the second chamber 24 is communicated with the sewage discharge joint 5, during back flushing, back flushing high-pressure water with impurities enters the second chamber 24 through the sewage discharge port 240 and enters the sewage discharge joint 5 through the second chamber 24 to be discharged, and the sewage discharge device is reasonable in structure and good in sewage discharge effect.

And the outlet joint 4, the inlet joint 6 and the sewage discharge joint 5 are all connected with pipelines with valves, and the valves control the opening and closing of the pipelines. When high-pressure water with impurities is filtered conventionally, valves corresponding to the outlet connector 4 and the inlet connector 6 are in an open state, and a valve corresponding to the sewage discharge connector 5 is in a closed state; when the filter pipe 3 is backwashed, the valves corresponding to the outlet joint 4 and the sewage discharge joint 5 are in an open state, the inlet joint 6 is in a closed state, and the back-flushed high-pressure water without impurities is connected from the outlet joint 4.

The both ends of outer tube 1 all are connected with outlet joint 4 and blowdown joint 5 through the screw thread, all be equipped with sealing washer 8 between the one end of outer tube 1 and the outlet joint 4 and between the other end of outer tube 1 and the blowdown joint 5. Set up sealing washer 8, improve the leakproofness between the one end of outer tube 1 and the exit joint 4 and between the other end of outer tube 1 and blowdown connect 5, prevent the infiltration of water.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. Oil field water injection well water injection filter, its characterized in that: the sewage filter comprises an outer pipe, an inner pipe and a filter pipe, wherein one end of the outer pipe is provided with an outlet joint, the other end of the outer pipe is provided with a sewage discharge joint, and the outer wall of the outer pipe is also provided with an inlet joint;

2. The oilfield water injection well water injection filter of claim 1, wherein: the one end of sealed head towards the filter tube is equipped with the overlap, the overlap crimping is in on the outer wall of filter tube, be equipped with a plurality of through-holes on the filter tube, the filter screen has all been laid on the inner wall of filter tube and the outer wall, the mesh diameter of filter screen is less than the diameter of through-hole.

3. The oilfield water injection well water injection filter of claim 1, wherein: the inner pipe is provided with a first cavity and a second cavity which are not communicated with each other, the outer wall of the second cavity is provided with at least one pair of sewage outlets, and the sewage outlets are communicated with the interiors of the second cavity and the outer pipe.

4. The oilfield water injection well water injection filter of claim 1, wherein: and the outlet joint, the inlet joint and the sewage discharge joint are all connected with pipelines with valves, and the valves control the opening and closing of the pipelines.

5. The oilfield water injection well water injection filter of claim 1, wherein: the both ends of outer tube all are connected through screw thread and outlet joint and blowdown joint, all be equipped with the sealing washer between the one end of outer tube and the outlet joint and between the other end of outer tube and the blowdown joint.