CN204200191U - Helicoidal pump sand screen - Google Patents
Helicoidal pump sand screen Download PDFInfo
- Publication number
- CN204200191U CN204200191U CN201420559109.4U CN201420559109U CN204200191U CN 204200191 U CN204200191 U CN 204200191U CN 201420559109 U CN201420559109 U CN 201420559109U CN 204200191 U CN204200191 U CN 204200191U
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- China
- Prior art keywords
- bearing
- central tube
- sand screen
- pump shaft
- sand
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- Expired - Fee Related
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Abstract
The utility model provides a kind of helicoidal pump sand screen that can drive downhole well fluid function.Comprise central tube, light-wall pipe that sealing shroud is contained in central tube outside, and the filter sand net material be clamped between the two, on the tube wall of central tube and light-wall pipe, radial direction is provided with multiple through hole, centrally tubular axis internally arranges at least two group bearing bracket stand and bearing assemblies, run through in bearing and have spiral pump shaft, bearing and spiral pump shaft form rotatable engagement, and the spiral pump shaft between bearing is fixedly wound with helical blade.Adopt helicoidal pump sand screen of the present utility model, its filter sand net material stops reservoir sand to enter pit shaft, drive helical blade that liquid in pipe is pushed through the other end from one end when spiral pump shaft rotates, there is the effect overcoming friction drag, reach balance sand screen two ends generation pressure reduction, improve horizontal segment inflow profile energetically harmonious, effective control edge-bottom water alter fast into, play horizontal well advantage and also obtain greatest benefit.
Description
Technical field
The utility model relates to oil exploitation downhole hardware field, particularly a kind of oil exploitation well sand-proof sand filtering pipe with pumping liquid function.
Background technology
Sand screen technology has the effect preventing formation sand production, is used widely in oil well exploitation field.The patent No. is a kind of Anti-washout high-permeability sand filtering pipes instrument that the Chinese utility model patent of ZL200420039445.2 describes current Application comparison maturation in detail; comprise porous central tube, metal screen and porous outside protective pipe; also comprise the coat of metal installed between metal screen and porous outside protective pipe; this coat of metal is stainless steel thin-wall tubulose body, and it lays fluid circulating hole.This sand screen has and is easy to anti-flushing well de-plugging, extends the feature in oil well production cycle.The patent No. is that the Chinese utility model patent of ZL200420039444.8 discloses a kind of long-life sand filtering pipe with side runner; the filter sand net comprising central tube and it is installed and protection tube; described protection tube tube wall is concave/convex-shaped structure, and its high spot is provided with side direction flow passage.This sand screen avoids perpendicular flow, and the phenomenon of direct erosion filter sand material, extends life cycle.But above-mentioned sand screen only has single sand-proof function, effect is not driven to the fluid of pit shaft inside.
Utility model content
The purpose of this utility model is for prior art Problems existing, provides a kind of helicoidal pump sand screen that can drive downhole well fluid function.
The technical scheme that the utility model adopts:
Helicoidal pump sand screen, comprise central tube, light-wall pipe that sealing shroud is contained in central tube outside, and the filter sand net material be clamped between the two, on the tube wall of central tube and light-wall pipe, radial direction is provided with multiple through hole, centrally tubular axis internally arranges at least two group bearing bracket stand and bearing assemblies, run through in bearing and have spiral pump shaft, bearing and spiral pump shaft form rotatable engagement, and the spiral pump shaft between bearing is fixedly wound with helical blade.
Such scheme also comprises: central tube two ends are stretched out from light-wall pipe two ends, and are processed with screw thread at external part.
Two bearing bracket stands of central tube end and bearing assembly are near the external part of central tube.
Described filter sand net material is one or more layers structure, and material is that metal screen is or/and nonmetal filter screen.
The utility model compared with prior art tool has the following advantages:
Adopt helicoidal pump sand screen of the present utility model, its filter sand net material stops reservoir sand to enter pit shaft, drive helical blade that liquid in pipe is pushed through the other end from one end when spiral pump shaft rotates, there is the effect overcoming friction drag, reach balance sand screen two ends generation pressure reduction, improve horizontal segment inflow profile energetically harmonious, effective control edge-bottom water alter fast into, play horizontal well advantage and also obtain greatest benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of this helicoidal pump sand screen.
In figure: 1, spiral pump shaft, 2, central tube, 3, helical blade, 4, filter sand net material, 5, light-wall pipe, 6, bearing, 7, bearing bracket stand, 8, the through hole of light-wall pipe, 9, the through hole of central tube, a, fluid input, b, fluid exit.
Fig. 2 is that application helicoidal pump sand screen of the present utility model is at a kind of connection tubing string schematic diagram implemented in well.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Referring to Fig. 1, this helicoidal pump sand screen, comprises spiral pump shaft 1, central tube 2, helical blade 3, filter sand net material 4, light-wall pipe 5, bearing 6, bearing bracket stand 7.Central tube 2 internal fixtion has bearing bracket stand 7, and spiral pump shaft 1 is arranged in the bearing 6 in bearing bracket stand 7, coordinates in rotational slide; Central tube 2 outside is wound around one or more layers filter sand net material 4, and it is outside that light-wall pipe 5 is sleeved on filter sand net material 4, and light-wall pipe 5 two ends and central tube 2 form fixed seal connection.Spiral pump shaft 1 outside is wound with helical blade 3, and both tight joints form a helicoidal pump.
Its application principle: helicoidal pump sand screen is placed in oil well reservoir horizontal well section pit shaft, during work, formation fluid enters filter sand net material 4 by the through hole 8 of light-wall pipe 5, it is inner that fluid through filtering enters central tube 2 by the through hole 9 of central tube 2, the helicoidal pump be now made up of spiral pump shaft 1 and helical blade 3 is in continuous rotation state, is pushed by the fluid of horizontal segment central tube 2 from input a to output b.The pressure discharge opeing of helicoidal pump can produce swabbing action at input a place and increase generation pressure reduction, and top pressure effect can be produced at output b place, thus reduce two ends producing pressure differential, also overcome fluid friction drag in pipe simultaneously, make horizontal segment inflow profile harmony obtain maximum improvement.When after production a period of time, formation condition changes to some extent.Spiral pump shaft operating parameters can be changed in real time, again adjust inflow profile balanced.This initiative kinetic energy regulate and control method, is significant to the development benefit of well of improving the standard.
The mode of occupation of this helicoidal pump sand screen is shown in Fig. 2.
Flow string: settle several helicoidal pump sand screens in horizontal production well section relevant position, its quantity can according to the corresponding adjustment of well segment length.At horizontal segment toe distalmost end input a, plug 12 is installed; hold by box cupling 13 and downhole packer 14 thread connection at output b; downhole packer 14 is by box cupling 13 and pipe nipple 15 thread connection; reducer 16, down-hole submersible motor 17, protector 18 share with downhole cable 19(and electric submersible pump) form a set of downhole power systems; this dynamical system passes through output shaft and spiral pump shaft 1 close-coupled of reducer 16, and the right-hand member of protector 18 and production tube 20 are by screw thread or other form close-coupled.
Duty: reservoir fluid enters in screen casing casing annulus by the borehole 11 of sleeve pipe 10; helicoidal pump is being entered by the light-wall pipe 5 of helicoidal pump sand screen, filter sand net material 4, central tube 2; the dynamical system be made up of reducer 16, down-hole submersible motor 17, protector 18 is rotated by the driven by power spiral pump shaft 1 carried to downhole cable 19 by ground and helical blade 3; pushed to output b by input a by tube fluid, then tube fluid is entering casing tube annular space again by pipe nipple 15.
By the change of frequency that ground transmits electric power in the face of downhole cable, regulate the rotating speed of down-hole submersible motor 17, reach the object changing spiral pump shaft operating parameters; Reducer 16, down-hole submersible motor 17, protector 18 and downhole cable 19 and ground electrical power frequency modulation technology, all belong to existing mature technology.
Conventional completed well mode is greater than horizontal segment toe at horizontal segment heel (near output b) producing pressure differential and (near input a), easily causes bottom water coning at heel.And after adopting helicoidal pump sand screen, by helicoidal pump mechanical force, toe fluid is pushed to heel, can suction force be produced at toe like this and improve producing pressure differential, and be subject to the top pressure of fluid at heel and reduce producing pressure differential, thus the equilibrium of the section of being up to the standard integral production pressure reduction, the phenomenon of advancing by leaps and bounds with the horizontal segment heel water breakthrough eliminating long-standing problem people.
Claims (4)
1. helicoidal pump sand screen, comprise central tube (2), (5) sealing shroud be contained in the (2) outside light-wall pipe of central tube, and be clamped in filter sand net material between the two (4), (2) central tube is provided with multiple through hole with radial direction on light-wall pipe tube wall (5), it is characterized in that: centrally manage (2) axial inner arrange at least two group bearing bracket stands (7) with bearing (6) assembly, run through in bearing (6) and have spiral pump shaft (1), (1) bearing (6) and spiral pump shaft form rotatable engagement, and (3) the spiral pump shaft between bearing (6) is (1) upper is fixedly wound with helical blade.
2. helicoidal pump sand screen as claimed in claim 1, is characterized in that: (5) central tube (2) two ends stretches out at two ends from light-wall pipe, and is processed with screw thread at external part.
3. helicoidal pump sand screen as claimed in claim 2, is characterized in that: central tube (2) end two bearing bracket stands (7) with bearing (6) assembly near central tube external part (2).
4. the helicoidal pump sand screen as described in claim 1,2 or 3, is characterized in that: (4) described filter sand net material is one or more layers structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559109.4U CN204200191U (en) | 2014-09-27 | 2014-09-27 | Helicoidal pump sand screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559109.4U CN204200191U (en) | 2014-09-27 | 2014-09-27 | Helicoidal pump sand screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204200191U true CN204200191U (en) | 2015-03-11 |
Family
ID=52658159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420559109.4U Expired - Fee Related CN204200191U (en) | 2014-09-27 | 2014-09-27 | Helicoidal pump sand screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204200191U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507854A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | Screw pump sand filter pipe |
-
2014
- 2014-09-27 CN CN201420559109.4U patent/CN204200191U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507854A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | Screw pump sand filter pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20210927 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |