CN2687330Y - Special screen of eccentric blanking plug for oil field siparated layer water injection well - Google Patents
Special screen of eccentric blanking plug for oil field siparated layer water injection well Download PDFInfo
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- CN2687330Y CN2687330Y CN 200420004720 CN200420004720U CN2687330Y CN 2687330 Y CN2687330 Y CN 2687330Y CN 200420004720 CN200420004720 CN 200420004720 CN 200420004720 U CN200420004720 U CN 200420004720U CN 2687330 Y CN2687330 Y CN 2687330Y
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- oil field
- screen
- blanking plug
- filter screen
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Abstract
The utility model provides a special screen of eccentric blanking plug for oil field separated layer water injection well. The utility model solves the technical problem of that the narrow overflow passage is easy to form to a blinding of screen and the fixed overflow is not convenient to measure and adjust the result in different layer section on the site in existing screen. The special screen of eccentric blanking plug for oil field separated layer water injection well is characterized in that the six aequilate overflow passages (2) are uniformly distributed at the cone tip along the screen head(1); the surface on the cylinder of the screen head(1) is provided with a single, two, or three overflow holes(3), and the overflow holes(3) is uniformly distributed at the surface on the cylinder of the screen head(1) along a curtain radial plane. The utility model increases the oveflow rate of the filter screen, which makes the screen to be adjusted.
Description
Technical field:
The utility model relates to underground work instrument commonly used in the oil recovery field, a kind of oil field, especially a kind of special-purpose filter screen that is applied on the eccentric blanking plug of separated-zone water infection oil field well.
Background technology:
At present employed filter screen all is six slits that have wide 1mm and equidistantly distribute on the circular cone cylindrical body surface of hollow on the eccentric blanking plug of separated-zone water infection oil field well, with these six slits as flow channels.The main effect that filter screen is set is to prevent that bigger dirt from entering water nozzle, result in blockage, to guarantee the normal water filling in stratum, because the mode water filling of produced-water reinjection is adopted in the oil field always, water quality is relatively poor but for many years,, often make many tiny dirts partly or entirely the overcurrent slit of filter screen be stopped up, make water nozzle, stratum can not get normal water filling at all, also influenced crude oil production simultaneously, strengthened the difficulty of water well test; This in addition filter screen size is single, make inflow-rate of water turbine fix, the survey that is not easy to the situ part interval is transferred, and forces the workman to transform filter screen voluntarily, cause down-hole eccentric blanking plug filter screen thousand strange hundred samples, influenced normally applying of " water injection well zonal flow rate concocting method ".
The utility model content:
The narrow easy formation filter screen of filter screen flow channels that the eccentric blanking plug filter screen of existing separated-zone water infection oil field well in use exists stops up and inflow-rate of water turbine fixedly is not easy to the deficiency that on-the-spot different interval is surveyed accent in order to overcome, the utility model provides a kind of separated-zone water infection oil field well off-centre blanking plug special-purpose filter screen, and the special-purpose filter screen of the eccentric blanking plug of this kind separated-zone water infection oil field well has inflow-rate of water turbine and is difficult for the characteristics that formation is stopped up, filter screen has adjustability greatly.
The technical solution of the utility model is: the special-purpose filter screen of the eccentric blanking plug of this kind separated-zone water infection oil field well, circular cone cylindricality net cap by link that has internal thread and hollow constitutes, and being evenly distributed with wide flow channels along the cone top of net cap wherein had opening on the periphery of net cap.
Usually the quantity of flow channels can be set at 6.
In addition, the quantity of crossing opening can be 1,2 or 3, and when its quantity was 2 or 3, the described opening of crossing need be uniformly distributed on the periphery of net cap along a certain sagittal plane.
If on the circular cone cylindricality net cap of hollow, do not have flow channels, also can directly open one and cross opening on the cone top of net cap.
The utlity model has following beneficial effect: owing to take the special-purpose filter screen of the eccentric blanking plug of the separated-zone water infection oil field well of such scheme, on the basis of original flow channels, increased and crossed opening, make the filter screen inflow-rate of water turbine increase, can guarantee that the stratum obtains normal water filling and prevents that sewage from stopping up filter screen; Because filter screen can adopt the form in single hole, two holes or three holes, the staff can select the filter screen of different hole counts and then adjust streamflow according to need, is convenient to the finishing of survey accent work of on-the-spot differently interval.
Description of drawings:
Accompanying drawing 1 is a schematic appearance of the present utility model;
Accompanying drawing 2 is structure sectional views of the present utility model;
Structure sectional view when accompanying drawing 3 is the perforate of the utility model top
1-net cap among the figure, the 2-flow channels, 3-crosses opening, the 4-link.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
As Fig. 1 in conjunction with shown in Figure 2, the special-purpose filter screen of the eccentric blanking plug of this kind separated-zone water infection oil field well, circular cone cylindricality net cap 1 by link 4 that has internal thread and hollow constitutes, its material is a rigid material, cone top along net cap 1 is evenly distributed with wide flow channels 2, these flow channels were confirmed as widely 1 millimeter during at the scene routine was used, and its quantity is 6.Opening 3 was wherein arranged on the periphery of net cap 1, these positions of crossing opening on the side of flow channels, these innovation part of the present utility model just places.
The quantity of crossing opening 3 can also can be 2 or 3 for 1, it is 6 millimeters that flow channels with respect to 1 millimeter can be selected the diameter of opening 3, but when its quantity when being 2 or 3, guarantee that opening 3 was distributed on the periphery of net cap 1 to vertical uniform plane with cylinder axis along a certain.
In addition, as shown in Figure 3, also can be chosen on the basis of original filter screen internal construction, do not open flow channels, only get out the bigger opening 3 of crossing at the cone top of net cap 1, for example can to select the diameter of opening 3 be 10 millimeters to the flow channels with respect to 1 millimeter, will guarantee under the sky mouth situation this moment, inflow-rate of water turbine is unobstructed, and the blanking plug screw thread is intact.
During actual the use, filter screen closely is connected with blanking plug by the screw thread in its link 4, operating personnel can remove throw in catcher by ground the eccentric blanking plug of separated-zone water infection oil field well is proposed the well head or the tube of devoting oneself to work, in described filter screen, water nozzle is housed, the mouth footpath can select 1.0 to 8.8mm, can realize seperated layer water injection by changing the water nozzle size or changing different filter screens and adjust the seperated layer water injection amount during test.Multiple perforating filter screen has increased on the basis of original flow channels crosses opening, makes the filter screen inflow-rate of water turbine increase, and can guarantee that the stratum obtains normal water filling and prevents that sewage from stopping up filter screen; Because filter screen can adopt the form in single hole, two holes or three holes, the staff can select the filter screen of different hole counts and then adjust streamflow according to need, is convenient to the finishing of survey accent work of on-the-spot differently interval.Realized that overcurrent does not unobstructedly stop up, inflow-rate of water turbine is adjustable, be convenient to workman's operation, satisfied the purpose of injection allocation requirement, for oil field long-term " injecting good water ", " injecting enough water " provide technical guarantee.
Claims (5)
1, the special-purpose filter screen of the eccentric blanking plug of a kind of separated-zone water infection oil field well, circular cone cylindricality net cap (1) by link that has internal thread (4) and hollow constitutes, cone top along net cap (1) is evenly distributed with wide flow channels (2), it is characterized in that: opening (3) was arranged on the periphery of net cap (1).
2, the special-purpose filter screen of the eccentric blanking plug of a kind of separated-zone water infection oil field well according to claim 1, it is characterized in that: the quantity of flow channels (2) is 6.
3, the special-purpose filter screen of the eccentric blanking plug of a kind of separated-zone water infection oil field well according to claim 1 and 2, it is characterized in that: the quantity of crossing opening (3) is 1.
4, the special-purpose filter screen of the eccentric blanking plug of a kind of separated-zone water infection oil field well according to claim 1 and 2, it is characterized in that: the quantity of crossing opening (3) is 2 or 3, and the described opening (3) of crossing is uniformly distributed on the periphery of net cap (1) along a certain sagittal plane.
5, the special-purpose filter screen of the eccentric blanking plug of a kind of separated-zone water infection oil field well, circular cone cylindricality net cap (1) formation by link that has internal thread (4) and hollow is characterized in that: the cone top of net cap (1) has one to cross opening (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420004720 CN2687330Y (en) | 2004-02-26 | 2004-02-26 | Special screen of eccentric blanking plug for oil field siparated layer water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420004720 CN2687330Y (en) | 2004-02-26 | 2004-02-26 | Special screen of eccentric blanking plug for oil field siparated layer water injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2687330Y true CN2687330Y (en) | 2005-03-23 |
Family
ID=34667859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420004720 Expired - Fee Related CN2687330Y (en) | 2004-02-26 | 2004-02-26 | Special screen of eccentric blanking plug for oil field siparated layer water injection well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2687330Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10626707B2 (en) | 2015-06-30 | 2020-04-21 | Halliburton Energy Services, Inc. | Flushing filter |
-
2004
- 2004-02-26 CN CN 200420004720 patent/CN2687330Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10626707B2 (en) | 2015-06-30 | 2020-04-21 | Halliburton Energy Services, Inc. | Flushing filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050323 Termination date: 20100226 |