CN210278508U

CN210278508U - Back-flushing filter

Info

Publication number: CN210278508U
Application number: CN201920575923.8U
Authority: CN
Inventors: 董鹏毅; 姜国庆; 邹峥禄; 韩朝; 韩晓冬; 高永攀; 白龙; 管九洲
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-04-10
Anticipated expiration: 2029-04-25

Abstract

The utility model relates to a but backwash filter, set up between water supply installation and well head, but backwash filter includes filter housing and filter screen, filter housing's inner chamber forms cylindric filtration cavity, the drain that can the switching is seted up to filter housing's one end, the water filling port of being connected with the well head is seted up to filter housing's the other end, the water inlet of being connected with water supply installation is seted up along the tangential of section of thick bamboo wall on filter housing's section of thick bamboo wall, be provided with continuous heliciform guiding gutter on the section of thick bamboo wall of filtration cavity, the guiding gutter is linked together with the water inlet, the filter screen sets up in the filtration cavity, the filter screen is for one end and seals, the other end is open-ended. The utility model discloses can filter the water of pouring into the well head to can carry out the back flush to self, it is more to the aquatic impurity of well head injection to have solved, blocks up the technical problem of oil reservoir easily.

Description

Back-flushing filter

Technical Field

The utility model relates to an oil recovery engineering technical field especially relates to a but backwash filter.

Background

At the present stage, the oil well of the oil field is injected with water and the oil field is developed by adopting centralized treatment and dispersive injection modes, but the pipeline is easy to corrode in the long-term use process, so that the cleanness degree of the water conveyed to the well mouth is difficult to meet the requirement of the injection standard, and if the water with poor cleanliness is injected into the oil well, solid particles can be brought into the oil reservoir to block the oil reservoir, which is not beneficial to the development of the oil field. However, the centralized replacement of the pipelines wastes a large amount of manpower and financial resources, so that the plugging removal work has to be carried out regularly in order to develop the oil field smoothly, the crude oil exploitation cost is increased, and adverse effects are brought to the environment and the production.

Aiming at the problems that in the related art, water injected into a wellhead is rich in impurities and is easy to block an oil reservoir, an effective solution is not provided at present.

Therefore, the inventor provides a backwashing filter by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a but backwash filter utilizes water injection pressure to separate and filter the impurity of aquatic to clear away the impurity that the water brought into in transmission process, guarantee the normal development in oil field, can utilize oil well injection pressure to carry out the back flush of self simultaneously, clear away inside accumulational impurity, and do not need extra power, reduce the input cost, guarantee the long-term normal operating condition of equipment.

The purpose of the utility model can be realized by adopting the following technical scheme:

the utility model provides a but backwash filter sets up between water supply installation and well head, but backwash filter includes filter housing and filter screen, filter housing's inner chamber forms cylindric filtration cavity, the drain that can the switching is seted up to filter housing's one end, filter housing's the other end seted up with the water filling port that the well head is connected follow on filter housing's the section of thick bamboo wall the tangential of section of thick bamboo wall seted up with the water inlet that water supply installation connects, be provided with continuous heliciform guiding gutter on filter housing's the section of thick bamboo wall, the guiding gutter with the water inlet is linked together, the filter screen sets up in the filtration cavity, the filter screen is sealed for one end, the other end is open-ended tubular structure, the open end of filter screen is connected water filling port department.

The utility model discloses an in a preferred embodiment, the filter housing includes solid-liquid separation portion and impurity gathering portion, solid-liquid separation portion is conical tubular structure, impurity gathering portion is cylindrical tubular structure, solid-liquid separation portion's major diameter one end with water filling port an organic whole is connected, solid-liquid separation portion's minor diameter one end with the one end an organic whole of impurity gathering portion is connected, the other end of impurity gathering portion with drain an organic whole is connected, solid-liquid separation portion's inside cavity with the inside cavity of impurity gathering portion is linked together and is formed the filtration cavity.

In a preferred embodiment of the present invention, the filter net is disposed at a middle portion of the inner chamber of the impurity collecting unit along an extending direction of the solid-liquid separating unit.

In a preferred embodiment of the present invention, the filter screen penetrates through the inner chamber of the solid-liquid separation unit.

The utility model discloses a in a preferred embodiment, but the backwash filter still includes right the filter screen carries out the go-between of fixing, the go-between is located the inboard of water filling port, the inner wall of water filling port with through threaded connection between the outer wall of go-between, the filter screen is fixed on the go-between, and the filter screen passes through-hole on the go-between with the well head intercommunication.

In a preferred embodiment of the present invention, the connection between the filter net and the connection ring is bonding or welding.

The utility model discloses an in a preferred embodiment, but the backwash filter still includes the well head and connects, the one end setting that the well head connects is in the water filling port, the inner wall of water filling port with be provided with the sealing washer between the outer wall that the well head connects, the inner wall of water filling port with pass through threaded connection between the outer wall that the well head connects.

In a preferred embodiment of the present invention, the filter further comprises a drain plug and a connection collar, wherein the drain plug is fixed on the drain port through the connection collar.

The utility model discloses an in a preferred embodiment, the connection hoop cover is established the drain plug with the outside of drain, the inner wall of connection hoop with the outer wall of drain plug with all through threaded connection between the outer wall of drain.

In a preferred embodiment of the present invention, the water inlet is externally connected to a water inlet joint.

From top to bottom, the utility model discloses a but backwash filter's characteristics and advantage are:

the filter capable of backwashing is arranged between a water supply device and a well head, one end of a filter shell is provided with a drain outlet, the other end of the filter shell is provided with a water filling port connected with the well head, a water inlet connected with the water supply device is arranged on the side wall of the filter shell along the tangential direction of the side wall, a spiral diversion trench communicated with the water inlet is arranged on the inner wall of a filtering cavity, a filter screen is arranged in the filtering cavity and is fixedly connected with the water filling port, because of the existence of water filling pressure, water flow can do high-speed spiral motion along the diversion trench after entering the filtering cavity through the water inlet, due to the centrifugal force, solid and liquid can be separated in the diversion trench, solid impurities are impacted to the drain outlet to be discharged, clear water after solid-liquid separation enters the well head through the filter screen, thereby achieving the purpose of removing impurities in water, under the state that the drain was opened, the water inlet was closed, the injection pressure of usable oil well carries out the back flush to the filter screen to impurity with the back flush discharges through the drain, and does not need extra power, and not only the filter effect is good, has the automatically cleaning ability moreover, and greatly reduced input cost can guarantee the long-term steady operation of equipment.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

FIG. 1: is a front cross section view of the backwashing filter of the utility model.

FIG. 2: does the utility model discloses but the water inlet pipe connects in the backwash filter and the connection structure sketch map of filter housing.

The utility model provides an reference numeral does: 1. a filter housing; 101. a solid-liquid separation section; 102. an impurity collecting section; 103. a filtration chamber; 104. a diversion trench; 105. a water inlet; 106. a sewage draining outlet; 107. a water injection port; 2. a filter screen; 3. a drain outlet is screwed; 4. a connecting hoop; 5. a connecting ring; 6. a wellhead joint; 7. a water pipe joint; 8. and (5) sealing rings.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model provides a but backwash filter sets up between water supply installation and well head along the horizontal direction, and this but backwash filter includes filter housing 1 and filter screen 2, and filter housing 1 is used for carrying out solid-liquid separation to the large granule solid impurity who pours into its inside aquatic with water, and filter screen 2 is used for filtering the water after solid-liquid separation to the small granule solid impurity in the filtering aquatic, and then guarantees that the water of pouring into in the well head does not contain solid impurity. Form cylindric filter chamber 103 in the filter housing 1, drain 106 that can the switching is seted up to filter housing 1's one end, the water filling port 107 of being connected with the well head is seted up to filter housing 1's the other end, water inlet 105 of being connected with water supply installation is seted up along the tangential of section of thick bamboo wall on filter housing 1's the section of thick bamboo wall, the direction perpendicular to that rivers pass through water inlet 105 and get into filter chamber 103 filters chamber 103's axial, be provided with continuous heliciform guiding gutter 104 on filter chamber 103's the inner wall, guiding gutter 104 is linked together with water inlet 105, filter screen 2 sets up in filter chamber 103, filter screen 2 is the seal for one end, the other end is open-ended tubular structure, the open end of filter screen 2. The utility model discloses during the backwash filter water injection, at first close drain 106, open water inlet 105 and water filling port 107, in the process of injecting water into filtering cavity 103 through water inlet 105, because the existence of water injection pressure, rivers can be high-speed screw motion along guiding gutter 104 after getting into filtering cavity 103 through water inlet 105, because of the centrifugal force effect, can separate solid and liquid in guiding gutter 104, solid impurity is strikeed to drain 106 department, clear water after the solid-liquid separation then gets into in the well head through filter screen 2, carry out centrifugal force separation and filtration separation to the solid impurity that mixes in the water from this, the solid impurity that has contained in the water has been fully filtered; when backwashing is carried out, the drain outlet 106 is opened, the water inlet 105 is closed, qualified filtered water can be injected into the filter screen 2 by utilizing high pressure in an oil well, backwashing is carried out, and impurities subjected to backwashing are discharged through the drain outlet 106 without extra power, so that the filter effect is good, the self-cleaning capacity is realized, the investment cost is greatly reduced, and the long-term stable operation of equipment can be ensured.

Further, as shown in fig. 1, the filter housing 1 includes a solid-liquid separation part 101 and an impurity aggregation part 102, the solid-liquid separation part 101 is a conical tubular structure, the impurity aggregation part 102 is a cylindrical tubular structure, one end of the solid-liquid separation part 101 with a large diameter is integrally connected with a water injection port 107, one end of the solid-liquid separation part 101 with a small diameter is integrally connected with one end of the impurity aggregation part 102, the other end of the impurity aggregation part 102 is integrally connected with a sewage discharge port 106, a water inlet 105 is close to one end of the solid-liquid separation part 101 with a large diameter, and an internal cavity of the solid-liquid separation part 101 is communicated with an internal cavity of the impurity aggregation part 102 to form a. The solid-liquid separation section 101 has a conical tubular structure, so that water passing through the water inlet 105 can be ensured to perform high-speed spiral motion in the solid-liquid separation section 101, and solid impurities obtained by solid-liquid separation are pushed to the small-diameter end of the solid-liquid separation section 101, smoothly enter the impurity aggregation section 102, and are accumulated and discharged to the outside.

Further, as shown in FIG. 1, the inner diameter of the impurity accumulating section 102 is the same as the inner diameter of the small-diameter end of the solid-liquid separation section 101, so that the impurity accumulating section 102 and the solid-liquid separation section 101 can be smoothly connected, and the solid impurities obtained by the solid-liquid separation can smoothly enter the impurity accumulating section 102.

As shown in fig. 1, the filter screen 2 is disposed in the middle of the internal chamber of the impurity collecting unit 102 along the extending direction of the solid-liquid separation unit 101, and the filter screen 2 penetrates the internal chamber of the solid-liquid separation unit 101, so that the contact area between the filter screen 2 and water is increased as much as possible, the filtering efficiency is improved, and the water after solid-liquid separation can be sufficiently filtered.

As shown in fig. 1, the backwashing filter further comprises a connecting ring 5 for fixing the filter screen 2, the connecting ring 5 is of a circular ring structure, the connecting ring 5 is located at the inner side of the water filling port 107, an internal thread is arranged on the inner wall of the water filling port 107, an external thread is arranged on the outer wall of the connecting ring 5, the inner wall of the water filling port and the outer wall of the connecting ring 5 are connected in a matched mode through the internal thread and the external thread, the filter screen 2 is fixed on the connecting ring 5, and the filter screen 2 is communicated with the wellhead through a through hole. Through the setting of go-between 5, not only guarantee that filter screen 2 is firm in the installation of filtering chamber 103, be convenient for moreover dismantle and change.

The utility model discloses in, the connected mode between filter screen 2 and the go-between 5 can be for but not limited to bonding or welding.

As shown in fig. 1, but backwash filter still includes well head joint 6, the water injection through-hole has been seted up on well head joint 6, the one end setting of well head joint 6 is in water filling port 107, the water injection through-hole on well head joint 6 is linked together with the through-hole on the go-between 5, be provided with sealing washer 8 between the inner wall of water filling port 107 and the outer wall of well head joint 6, sealing washer 8 is covering on the outer wall of well head joint 6, and closely laminate with the inner wall of water filling port 107, avoid the condition that appears leaking between well head joint 6 and the filter housing 1. Be provided with the internal thread on the inner wall of water filling port 107, be provided with the external screw thread on the outer wall of wellhead joint 6, be connected through internal thread and external screw thread fit on the inner wall of water filling port 107 and between the outer wall of wellhead joint 6, be convenient for be connected backwash filter and well head through wellhead joint 6, be convenient for construction operation.

Further, a water injection control valve 601 is arranged on the wellhead connector 6, and whether a water injection through hole formed in the wellhead connector 6 is in a conducting state or not can be controlled through the water injection control valve 601.

As shown in fig. 1, the mode that the sewage draining exit 106 can be opened and closed is specifically that a sewage draining exit plug 3 is arranged on the sewage draining exit 106, and the sewage draining exit plug 3 is fixed on the sewage draining exit 106 through a connecting hoop 4.

Specifically, the connecting hoop 4 is sleeved outside the drain plug 3 and the drain 106, an internal thread is arranged on the inner wall of the connecting hoop 4, external threads are arranged on the outer walls of the drain plug 3 and the drain 106, and the inner wall of the connecting hoop 4 is matched and connected with the external threads through the internal thread between the outer wall of the drain plug 3 and the outer wall of the drain 106.

As shown in fig. 1, the water inlet 105 is externally connected with a water inlet joint 7, the water inlet joint 7 is convenient to be connected with a water supply device, a water inlet control valve 701 is arranged on the water inlet joint 7, and whether the water inlet 105 is in a conducting state or not can be controlled through the water inlet control valve 701.

Further, the connection manner of the water inlet pipe joint 7 and the water inlet 105 can be, but is not limited to, welding.

When the filter capable of backwashing is used, the filter capable of backwashing is connected with a wellhead of an injection well through a wellhead connector 6, when injection water is injected into a filtering chamber 103 through a water inlet 105 in a tangential direction, water flows along a spiral line of a conical cavity in a high-speed rotating mode, solid impurities in the water flow are subjected to a large centrifugal force, solid and liquid are subjected to preliminary separation, when the filtering chamber 103 is filled with the injection water, the injection water subjected to the preliminary solid-liquid separation enters the inner side of a filter screen 2 through the filtration of the filter screen 2, and then is injected into the wellhead through the wellhead connector 6; when the interior of the filter screen 2 and the filter chamber 103 needs to be cleaned, the water inlet control valve 701 on the water inlet pipe joint 7 is closed, the drain plug 3 on the drain 106 is opened, the sewage containing solid impurities is discharged into the drain tank through the drain 106, at the moment, the injection pressure of the oil well performs back washing on the filter screen 2 and the filter chamber 103, and the back-washed impurities are discharged through the drain 106.

The utility model discloses but backwash filter's characteristics and advantage are:

one, be provided with the heliciform guiding gutter 104 that is linked together with water inlet 105 on the inner wall of filter chamber 103 in this but backwash filter, still be provided with filter screen 2 with water filling port 107 fixed connection in filter chamber 103, under the effect of water injection pressure, rivers can be along guiding gutter 104 after getting into filter chamber 103 through water inlet 105 and do high-speed screw motion, because the centrifugal force is used, can carry out the initial gross separation to solid and liquid in guiding gutter 104, solid impurity is strikeed and is discharged to drain 106 department, clear water after the solid-liquid separation then gets into in the well head after the solid-liquid separation once more of filter screen 2, fully get rid of the solid impurity in the aquatic, the effectual problem that contains solid impurity in having solved the water injection to the well head, avoid blockking up the oil reservoir, guarantee that the oil well is mined smoothly.

When the drain outlet 106 is opened and the water inlet 105 is closed, the filter capable of backwashing can utilize the injection pressure of an oil well to backwash the inside of the filter screen 2 and the filter chamber 103, and discharge the backwashing impurities through the drain outlet 106 without extra power, so that the filter has self-cleaning capability, the investment cost is greatly reduced, and the long-term stable operation of equipment can be ensured.

Thirdly, the filter shell 1 in the backwashing filter comprises a conical tubular solid-liquid separation part 101 and a cylindrical tubular impurity gathering part 102, one end with a large diameter of the solid-liquid separation part 101 is integrally connected with a water injection port 107, one end with a small diameter of the solid-liquid separation part 101 is integrally connected with one end of the impurity gathering part 102, the other end of the impurity gathering part 102 is integrally connected with a sewage discharge port 106, and a water inlet 105 is close to one end with a large diameter of the solid-liquid separation part 101, so that high-speed spiral motion of water passing through the water inlet 105 in the solid-liquid separation part 101 can be ensured, solid impurities obtained by solid-liquid separation are pushed to one end with a small diameter of the solid-liquid separation part 101 and smoothly enter the impurity gathering part 102 to be accumulated and discharged outwards, the solid-liquid separation effect is improved, and the separated solid impurities are.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims

1. The backwashing filter is arranged between a water supply device and a well mouth and is characterized by comprising a filter shell (1) and a filter screen (2), wherein a cylindrical filtering chamber (103) is formed in an inner cavity of the filter shell (1), a sewage draining outlet (106) capable of being opened and closed is formed in one end of the filter shell (1), a water filling port (107) connected with the well mouth is formed in the other end of the filter shell (1), a water inlet (105) connected with the water supply device is formed in the tangential direction of the cylinder wall of the filter shell (1), a continuous spiral diversion trench (104) is formed in the cylinder wall of the filtering chamber (103), the diversion trench (104) is communicated with the water inlet (105), the filter screen (2) is arranged in the filtering chamber (103), and the filter screen (2) is provided with one end which is sealed, The other end of the filter screen is of an open tubular structure, and the open end of the filter screen (2) is connected with the water injection port (107).

2. The backwashable filter of claim 1, wherein the filter housing (1) includes a solid-liquid separation part (101) and an impurity accumulation part (102), the solid-liquid separation part (101) has a conical cylindrical structure, the impurity accumulation part (102) has a cylindrical structure, one end of the solid-liquid separation part (101) having a large diameter is integrally connected to the water inlet (107), one end of the solid-liquid separation part (101) having a small diameter is integrally connected to one end of the impurity accumulation part (102), the other end of the impurity accumulation part (102) is integrally connected to the drain outlet (106), and an internal chamber of the solid-liquid separation part (101) communicates with an internal chamber of the impurity accumulation part (102) to form the filter chamber (103).

3. The backwashable filter according to claim 2, wherein the filter screen (2) is provided in a middle portion of an inner chamber of the impurity collecting section (102) in an extending direction of the solid-liquid separating section (101).

4. The backwashable filter of claim 3, wherein the filter screen (2) penetrates an inner chamber of the solid-liquid separation section (101).

5. The backwashable filter of claim 1, further comprising a connecting ring (5) for fixing the filter screen (2), wherein the connecting ring (5) is located at the inner side of the water injection port (107), the inner wall of the water injection port (107) is in threaded connection with the outer wall of the connecting ring (5), the filter screen (2) is fixed on the connecting ring (5), and the filter screen (2) is communicated with the wellhead through a through hole on the connecting ring (5).

6. The backwashable filter of claim 5, wherein the filter screen (2) and the connecting ring (5) are connected by bonding or welding.

7. The backwashable filter of claim 1, further comprising a wellhead connector (6), wherein one end of the wellhead connector (6) is arranged in the water injection port (107), a sealing ring (8) is arranged between the inner wall of the water injection port (107) and the outer wall of the wellhead connector (6), and the inner wall of the water injection port (107) is connected with the outer wall of the wellhead connector (6) through threads.

8. The backwashable filter of claim 1, further comprising a drain plug (3) and a connecting collar (4), wherein the drain plug (3) is fixed to the drain (106) by the connecting collar (4).

9. The backwashable filter of claim 8, wherein the connecting hoop (4) is sleeved outside the drain plug (3) and the drain opening (106), and the inner wall of the connecting hoop (4) is in threaded connection with the outer wall of the drain plug (3) and the outer wall of the drain opening (106).

10. The backwashable filter of claim 1, wherein the water inlet (105) is externally connected with a water inlet pipe connector (7).