CN204591237U - Oil well multiple-zone production down-hole automatic layer-changing device - Google Patents
Oil well multiple-zone production down-hole automatic layer-changing device Download PDFInfo
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- CN204591237U CN204591237U CN201520062241.9U CN201520062241U CN204591237U CN 204591237 U CN204591237 U CN 204591237U CN 201520062241 U CN201520062241 U CN 201520062241U CN 204591237 U CN204591237 U CN 204591237U
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- spool
- spring
- screen
- oil
- oil well
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Abstract
The utility model relates to field of petroleum exploitation, particularly a kind of oil well multiple-zone production down-hole automatic layer-changing device.The utility model is separated using pressure as controling parameter and is controlled the current intelligence of the oil of adjacent two layers, it is characterized in that: be made up of outer screen, inner screen, balancing spring, locking device, spool, axle sleeve, constrictor, spring-loaded plunger, spring, cavity and plunger etc., inner screen and outer screen composition concentric screen, being open mode when inner screen is positioned at lower gear, is closed condition when being positioned at gear.The utility model its install quantity and position can with the quantity of oil reservoir and position corresponding, and unrestricted, the Automated condtrol without the need to artificially manipulating can be realized, expand oil recovery flow, reduce oil recovery energy consumption, there is structure simple, dependable performance, the advantages such as Be very effective.
Description
Technical field
The utility model relates to field of petroleum exploitation, particularly the device of a kind of oil well multiple-zone production down-hole automatic layer-changing.
Background technology
Oil well is a kind of mode that current most oilfield exploitation generally uses across oil commingling, but there are differences due to each formation pressure, permeability, oil property and moisture content, causes mutually disturbing between each oil reservoir, makes oil well production complicated.In the prior art, Chinese patent application (publication number CN1389639A, publication date on January 8th, 2003) " fixed tubular column layering production down-hole string and implementing process thereof " disclose a kind of down-hole string and the implementing process thereof that can realize layering production, mainly open by ground to casing annulus pressurization or close seam change switch, its shortcoming is: 1. need to adopt ground pump truck group to be promoted by annular pressure higher than arriving borehole pressure, its workload is large, cost is very high, very high to the requirement of casing tube.2., because formation pressure is fluctuation, the force value that therefore finally should reach in annular space is also difficult to determine.3. this tubing string only can realize two oil reservoir separate zone productions, inapplicable for multiple reservoir exploitation.In Chinese patent application (Authorization Notice No. CN2761835, authorized announcement date on March 1st, 2006) " pipe controlling hydraulic layer changing switch ", ground pump truck also must be used could to realize changing layer function to oil jacket applied pressure by annulus, workload is equally very large.
Summary of the invention
The purpose of this utility model is that one provides structure simple, and the oil well multiple-zone production down-hole automatic layer-changing device of reliable operation, overcomes the deficiency of current layering oil production technology.Automatic layer-changing device relies on the difference of each oil reservoir oil product pressure, realizes the automatic layer-changing process that down-hole multilayer is recovered the oil.
The technical solution of the utility model is: oil well multiple-zone production down-hole automatic layer-changing device, this changes layer device and to be placed on fixed tubular column with well-case perforating place with dark position, separate using pressure as controling parameter and control the current intelligence of the oil of adjacent two layers, it is characterized in that: by outer screen, inner screen, balancing spring, locking device, spool, axle sleeve, constrictor, spring-loaded plunger, spring, cavity and plunger composition, inner screen and outer screen composition concentric screen, it is open mode when inner screen is positioned at lower gear, be closed condition when being positioned at gear.
Locking device is between outer screen and axle sleeve, distribute along oil pipe radial symmetric by two, the spring-loaded plunger of head points axis forms, spring-loaded plunger is made up of spring, plunger and cavity, and locking device coordinates with the spacing ring on spool top, and spool can be made to lock at gear place.
Balancing spring is between spool top and locking device, and its model can be selected according to concrete need of production; Axle sleeve is positioned at locking device bottom, and it is provided with 4 manholes be symmetric by the top.
Spool is positioned at axle sleeve, its inner hollow, and bottom is provided with 2 rows totally 8 symmetrical manholes, and lower oil reservoir oil can flow into thus; Spool shoulder and bottom are respectively as the pressure bearing face of upper and lower oil reservoir, and spool upper end is provided with spacing ring, the stroke of restriction spool, and make spool have fixing gear up and down, and spool and inner screen are for being rigidly connected, and its motion can drive inner screen to move.
Constrictor is positioned at the bottom changing layer device, coordinates as lower floor's fuel tap door switch with spool.
The utility model compared with prior art has following effect:
Achieve the function of multiple zone exploitation automatic layer-changing exploitation, to solve between oil reservoir that the pressure of different oil reservoir and production capacity rule difference cause mutually interference problem and oil commingling time each layer output and moisture content cannot distinguish and a difficult problem of measuring.
Pressure being carried out changing layer exploitation as controling parameter, realizing the Automated condtrol without the need to artificially manipulating.
Design respectively and be combined with two type valves, unified to realize the oil circuit of different layers oil reservoir exploitation, thus make oil recovery maximize throughput.
Have employed locking device and spring-loaded plunger, commutation process is only increased to after higher than preset value in pressure at both sides difference and carries out, also make spool commutation process become more rapid, effectively prevent the stop of spool in equilbrium position.
Adopt the mode of balancing spring and spool and inner screen balanced, by device of spring stiffness coefficient design, realize changing layer exploitation targetedly to certain one deck.
Utilize spool motion under pressure, realize the function of exploitation high pressure reservoir automatically, effectively utilize strata pressure natural energy, oil recovery energy consumption is reduced.
Accompanying drawing explanation
Fig. 1 is structural principle longitudinal plan of the present utility model.
Fig. 2 is the schematic diagram of locking device.
Fig. 3 is the schematic diagram of spring-loaded plunger.
Fig. 4 is the overall vertical section constructional drawing changing layer device first embodiment.
Fig. 5 is the concentric screen cross-sectional view changing layer device first embodiment.
Fig. 6 is the overall vertical section constructional drawing changing layer device second embodiment.
Fig. 7 is the concentric screen cross-sectional view changing layer device second embodiment.
Fig. 8 is installation site figure of the present utility model.
In Fig. 1, the sleeve pipe 1. after outer screen, 2. inner screen, 3. balancing spring, 4. locking device, 5. spool, 6. axle sleeve, 7. constrictor, 8. oil pipe, 9. perforation.
In Fig. 2,10. spring-loaded plunger.
In Fig. 3,11. springs, 12. cavitys, 13. plungers.
In Fig. 8,14. fixed tubular columns, 15. packers, 16. change a layer device, 17. screen casings.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
See Fig. 1, oil well multiple-zone production down-hole automatic layer-changing device, is made up of outer screen (1), inner screen (2), balancing spring (3), locking device (4), spool (5), axle sleeve (6) and constrictor (7) from top to bottom.Change the position of layer device in fixed tubular column (8) as shown in Figure 1.Change layer device and be fixed tubular column (8) up and down, and arrive assigned address with G.I.H while of two sections of fixed tubular columns (8).As shown in Figure 8, fixed tubular column (14) is fixed on sleeve pipe (9) by packer (15), the bottom of fixed tubular column is screen casing (17) or one way valve, changing a layer device (16) is installed between adjacent two packers, its quantity that can install and position can with the quantity of oil reservoir and position corresponding, and unrestricted.
Locking device (4) as shown in Figure 2, two symmetrical spring-loaded plungers (10) are contained in its inside, spring-loaded plunger (10) is made up of spring (11), cavity (12) and plunger (13), the spring-loaded plunger (10) of different model can be adopted, layer process of changing is carried out after spool (5) pressure at both sides difference is higher than certain value.
According to different production environments, the balancing spring (3) of different model can be adopted, realize to certain one deck have for exploitation: balancing spring (3) the stiffness factor greatly then more easy upper oil reservoir of exploitation, the little then more easy lower oil reservoir of exploitation of its stiffness factor.
In embodiment illustrated in fig. 4 one, the spool (5) changing layer device is in lower gear with inner screen (2), be locked in the middle part of spool (5) device (4) locking, the metering hole of constrictor (7) is blocked in spool (5) bottom, and lower oil reservoir oil cannot continue upwards to change a layer device by this.As shown in Figure 5, inner screen (2) is in lower gear, and concentric screen is in open mode, and upper oil reservoir oil is able to go out to enter oil pipe from concentric screen.Only have upper oil reservoir to be exploited in this embodiment, its pressure constantly reduces, and lower oil reservoir is in pressure recover state, and pressure constantly raises.When upper oil reservoir oil act on difference that the pressure on spool (5) top and lower oil reservoir oil act on the holding power of spool (5) bottom be greater than set numerical value time, the constraint that spool (5) can depart from locking device (4) moves downward and device (4) locking that is again locked, reach lower gear, complete the process of automatic layer-changing exploitation.
In embodiment illustrated in fig. 6 two, the spool (5) changing layer device is in gear with inner screen (2), be locked in the middle part of spool (5) device (4) locking, the metering hole of spool (5) bottom and constrictor (7) is at regular intervals, and lower oil reservoir oil is able to upwards change a layer device by this from metering hole.As shown in Figure 7, inner screen (2) is in gear, and concentric screen is in closed condition, and upper oil reservoir oil cannot go out enter oil pipe from concentric screen.Only have lower oil reservoir to be exploited in this embodiment, its pressure constantly reduces, and upper oil reservoir is in pressure recover state, and pressure constantly raises.Instantly when oil reservoir oil acts on difference that the holding power of spool (5) bottom and upper oil reservoir oil act on the pressure on spool (5) top higher than set numerical value, the constraint that spool (5) can depart from locking device (4) moves upward and device (4) locking that is again locked, reach gear, complete the process of automatic layer-changing exploitation.
Claims (5)
1. oil well multiple-zone production down-hole automatic layer-changing device, it is characterized in that: be made up of outer screen (1), inner screen (2), balancing spring (3), locking device (4), spool (5), axle sleeve (6), constrictor (7), spring-loaded plunger (10), spring (11), cavity (12) and plunger (13), inner screen (2) and outer screen (1) composition concentric screen, being open mode when inner screen (2) is positioned at lower gear, is closed condition when being positioned at gear.
2. oil well multiple-zone production down-hole according to claim 1 automatic layer-changing device, it is characterized in that: locking device (4) is positioned between outer screen (1) and axle sleeve (6), distribute along oil pipe radial symmetric by two, the spring-loaded plunger (10) of head points axis forms, spring-loaded plunger (10) is made up of spring (11), plunger (13) and cavity (12), locking device (4) coordinates with the spacing ring on spool (5) top, and spool (5) can be made to lock at gear place.
3. oil well multiple-zone production down-hole according to claim 1 automatic layer-changing device, it is characterized in that: balancing spring (3) is positioned between spool (5) top and locking device (4), and its model can be selected according to concrete need of production; Axle sleeve (6) is positioned at locking device (4) bottom, and it is provided with 4 manholes be symmetric by the top.
4. oil well multiple-zone production down-hole according to claim 1 automatic layer-changing device, it is characterized in that: spool (5) is positioned at axle sleeve (6), its inner hollow, bottom is provided with 2 rows totally 8 symmetrical manholes, spool (5) upper end is provided with spacing ring, and spool (5) and inner screen (2) are for being rigidly connected.
5. oil well multiple-zone production down-hole according to claim 1 automatic layer-changing device, is characterized in that: constrictor (7) is positioned at the bottom changing layer device, coordinates as lower floor's fuel tap door switch with spool (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062241.9U CN204591237U (en) | 2015-01-22 | 2015-01-22 | Oil well multiple-zone production down-hole automatic layer-changing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062241.9U CN204591237U (en) | 2015-01-22 | 2015-01-22 | Oil well multiple-zone production down-hole automatic layer-changing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204591237U true CN204591237U (en) | 2015-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520062241.9U Expired - Fee Related CN204591237U (en) | 2015-01-22 | 2015-01-22 | Oil well multiple-zone production down-hole automatic layer-changing device |
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| CN (1) | CN204591237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612636A (en) * | 2015-01-22 | 2015-05-13 | 中国石油大学(华东) | Automatic underground layer change device for oil well multilayer exploitation |
-
2015
- 2015-01-22 CN CN201520062241.9U patent/CN204591237U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612636A (en) * | 2015-01-22 | 2015-05-13 | 中国石油大学(华东) | Automatic underground layer change device for oil well multilayer exploitation |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20170122 |