CN201412095Y - Two-way well flushing valve for horizontal well - Google Patents
Two-way well flushing valve for horizontal well Download PDFInfo
- Publication number
- CN201412095Y CN201412095Y CN2009200462607U CN200920046260U CN201412095Y CN 201412095 Y CN201412095 Y CN 201412095Y CN 2009200462607 U CN2009200462607 U CN 2009200462607U CN 200920046260 U CN200920046260 U CN 200920046260U CN 201412095 Y CN201412095 Y CN 201412095Y
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- casing
- nipple
- casing nipple
- sand
- well
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- Expired - Fee Related
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Abstract
The utility model relates to a two-way well flushing valve for a horizontal well, which belongs to an auxiliary device for oil field operation. The two-way well flushing valve comprises a casing nipple, a plurality of through holes are formed on the casing wall in the middle of the casing nipple, one end of the casing nipple is connected with a casing collar, and the other end thereof is connectedwith a guide shoe; a sand-prevention filter sleeve is suited outside the casing nipple provided with the through holes, sand-prevention protective sleeve support rings are respectively arranged at the two ends of the sand-prevention filter sleeve, and each support ring is respectively welded on the casing nipple; a radial dummy club is arranged in the casing collar, a sealing core is arranged inthe casing nipple, a step is arranged in the sealing core, one end of the sealing core is propped against the dummy club, and the other end thereof is connected with a tubing pup joint through thread;a plurality of through holes are formed on the tubing wall of the tubing pup joint, a valve bal, a spring and a mandril are arranged in the tubing pup joint, the two ends of the spring are respectively propped against the valve ball and the mandril, the valve ball is positioned at the step of the sealing core, and the tubing pup joint is propped against the other end of the mandril in the guide shoe. The two-way well flushing valve can be used for sand prevention, slush displacement, plug removal, well flushing and reverse well flushing after sand control completion of the open-hole sieve ofthe horizontal well of the oil field.
Description
Technical field
The utility model relates to a kind of oil field operation servicing unit, particularly a kind of flushing valve.
Background technology
The horizontal wells technology is the effective way that improves oil recovery factor, accelerates recovery of the capital, reduces cost.Utilize horizontal well drilling technology to carry out the adjustment of old liberated area, oil field, tap the latent power and the whole efficient exploitation in newly developed area, each elephant is widely used in the whole nation.Equally, the horizontal well production technology also obtains bigger development, obtains tangible oil increasing effect and remarkable economic efficiency, and going up to produce for increasing of oil field is oily provides the important techniques support.
Oil field horizontal well completion technology commonly used is to be lowered to the completion mode that the sleeve pipe well cementing of cement carries out sieve tube completion under perforation completion or the oil reservoir bore hole horizontal segment again in oil reservoir well section at present.For permeability strong limit bottom water reservoir and highly aqueous Tibetan, for ease of segmentation exploitation, avoid local horizontal section water awl to be difficult to control and the enforcement of from now on every other technological measure, completion is selected based on the well-case perforating completion.And for loose sand oil accumulation, perforation completion easily shakes out in the oil well production process, the compound completion mode that therefore can adopt sleeve pipe+sand control screen promptly: the above setting of casing solid water of oil reservoir mud, sieve tube completion under the oil reservoir horizontal segment barefoot interval.Because having higher filtration area and higher oil well output and lower producing pressure differential, the bore hole sieve tube completion therefore is subjected to the oil field popular welcome.
The key problem in technology of sieve tube completion is the oil layer pollution of how removing effectively in the drilling process, remove the drilling well filter cake to the obstruction of stratum oil flow channel and sand screen and clean out screen casing and the borehole wall between the mud that retains.The most frequently used method is thoroughly to clean the bore hole borehole wall by pickling at present.Traditional positive well-flushing or anti-flushing well can only clean the mud in the screen casing parent tube, and the mud cake that adheres on the mud of screen casing and borehole wall annular space and the borehole wall there is not tangible cleaning performance, near the pit shaft stratum permeability can not get improving, and oil flow resistance is bigger, and the back production fluid amount that brings in is on the low side.
The utility model content
The purpose of this utility model is in order to overcome the deficiencies in the prior art, to provide a kind of when oilfield horizontal well bore hole screen sand control completion, sand control, the two-way flushing valve of horizontal well that replaces slurry, de-plugging, well cleanout and reverse cleanout to use.
The purpose of this utility model is achieved in that the two-way flushing valve of a kind of horizontal well, comprise casing nipple, the tube wall at casing nipple middle part is provided with some through holes, one end splicing sleeve box cupling of casing nipple, the other end of the casing nipple guide shoe that is threaded, be nested with sand control and cross filter ruffle outside the casing nipple of described through hole is set, the two ends that sand control is crossed filter ruffle are respectively equipped with sand control protective sleeve support ring, and each sand control protective sleeve support ring is welded on the casing nipple respectively; Be provided with radially boss in the casing coupling, be provided with the sealing fuse in the casing nipple, the sealing fuse comprises by the little internal diameter sealing fuse of step transition and large diameter sealing fuse, conflict on described boss in the outer end of little internal diameter sealing fuse, one end internal thread of large diameter sealing fuse connects tubing nipple, the tube wall of tubing nipple is provided with some through holes, be provided with valve ball, spring and push rod in the tubing nipple, conflict respectively on valve ball and push rod in the two ends of spring, valve ball is positioned at the step place of sealing fuse, and the other end of tubing nipple and push rod is conflicted in guide shoe.
The beneficial effects of the utility model are: utilize oil pipe to be lowered to instruments such as the mozzle supporting with the flushing valve assembly, packer during horizontal well washing, when mozzle arrives flushing valve assembly place, valve seat in the flushing valve assembly is opened, oil pipe and borehole wall annular space are connected, the cup packer that connects on the oil pipe can be finished positive well-flushing or anti-flushing well operation in addition.During anti-flushing well, completion fluid enters from the oil jacket annular space, and first screen casing place enters the annular space of the screen casing and the borehole wall on top, and by the effective displacement annular space mud of liquid circulation, the cleaning mud cake also carries out small-sized acidification to the stratum, near wellbore zone.Reacted raffinate is entered oil pipe and is returned out well head by the passage of flushing valve.The acid solution flow path is just in time opposite during positive well-flushing, is entered by oil pipe, returns out from oil jacket through annular space.Maximum characteristics of the present utility model have been installed one deck sand control screens exactly on the flushing valve assembly, reservoir sand can be because of flushing valve be not closed completely in valve passage enters screen casing when well-flushing or oil well production, thereby has more effectively stoped formation sand production to cause sand to bury the influence that the oil well later stage is produced.
Major technique innovative point of the present utility model:
1, carries out the sand control unique design by assembly to flushing valve, when having solved in the past oilfield horizontal well bore hole sieve tube completion, the flushing valve that adopts is not closed completely owing to the well-flushing rear valve base, the horizontal well that has caused oil field part bore hole screen sand control completion, because of reservoir sand is entered in the screen casing by the well-flushing valve base channel, the down-hole major accident that has caused horizontal sand control to lose efficacy.
2, by the design of forward and reversible swap well-flushing function, solved that can only just wash can not backwash in the past, run into well and collapse and wash obstructed problem.
3, use multi-functional flushing valve and kit, can replace and the wellbore damage of barefoot interval is carried out acidleach, pickling the mud of open-hole horizontal well section annular space.Effectively remove wall cake, the mediation grommet passages is recovered the near wellbore zone in-place permeability.
For enhanced leaktightness, be provided with O-ring seals between casing nipple and little internal diameter sealing fuse.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.
Among the figure, 1, mozzle, 2, boss; 3, casing coupling, 4, O-ring seals, 5, the sealing fuse; the little internal diameter of 5-1 sealing fuse, 5-2 large diameter sealing fuse, 6, valve ball; 7, sand control protective sleeve support ring, 8, spring, 9, sand control crosses filter ruffle; 10, through hole, 11, casing nipple, 12, tubing nipple; 13, push rod, 14, guide shoe.
The specific embodiment
As shown in Figure 1, the two-way flushing valve of a kind of horizontal well comprises casing nipple 11, and the tube wall at casing nipple 11 middle parts is provided with some through holes 10, an end splicing sleeve box cupling 3 of casing nipple 11, the other end of casing nipple 11 guide shoe 14 that is threaded.Be nested with sand control and cross filter ruffle 9 outside the casing nipple 11 that described through hole 10 is set, the two ends that sand control is crossed filter ruffle 9 are respectively equipped with sand control protective sleeve support ring 7, and each sand control protective sleeve support ring 7 is welded on respectively on the casing nipple 11.
Be provided with radially boss 2 in the casing coupling 3, be provided with sealing fuse 5 in the casing nipple 11, sealing fuse 5 comprises by the little internal diameter sealing fuse 5-1 of step transition and large diameter sealing fuse 5-2.Conflict on described boss 2 in the outer end of little internal diameter sealing fuse 5-1, the end internal thread of large diameter sealing fuse 5-2 connects tubing nipple 12, and the tube wall of tubing nipple 12 is provided with some through holes 10.
Being provided with valve ball 6, spring 8 and push rod 13 in the tubing nipple 12, conflicts respectively on valve ball 6 and push rod 13 in the two ends of spring 8, and valve ball 6 is positioned at the step place of sealing fuse 5, and the other end of tubing nipple 12 and push rod 13 is conflicted in guide shoe 14.During use, mozzle 1 backs down valve ball 6.After finishing using, mozzle 1 is regained, and by the effect of spring 8, valve ball 6 is pushed into the step place that seals fuse 5, and flushing valve is closed.
For enhanced leaktightness, between casing nipple 11 and little internal diameter sealing fuse 5-1, be provided with O-ring seals 4.
Claims (2)
1, the two-way flushing valve of a kind of horizontal well, it is characterized in that: comprise casing nipple, the tube wall at casing nipple middle part is provided with some through holes, one end splicing sleeve box cupling of casing nipple, the other end of the casing nipple guide shoe that is threaded, be nested with sand control and cross filter ruffle outside the casing nipple of described through hole is set, the two ends that sand control is crossed filter ruffle are respectively equipped with sand control protective sleeve support ring, and each sand control protective sleeve support ring is welded on the casing nipple respectively; Be provided with radially boss in the casing coupling, be provided with the sealing fuse in the casing nipple, the sealing fuse comprises by the little internal diameter sealing fuse of step transition and large diameter sealing fuse, conflict on described boss in the outer end of little internal diameter sealing fuse, one end internal thread of large diameter sealing fuse connects tubing nipple, the tube wall of tubing nipple is provided with some through holes, be provided with valve ball, spring and push rod in the tubing nipple, conflict respectively on valve ball and push rod in the two ends of spring, valve ball is positioned at the step place of sealing fuse, and the other end of tubing nipple and push rod is conflicted in guide shoe.
2, the two-way flushing valve of horizontal well according to claim 1 is characterized in that: be provided with O-ring seals between described casing nipple and the little internal diameter sealing fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200462607U CN201412095Y (en) | 2009-06-02 | 2009-06-02 | Two-way well flushing valve for horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200462607U CN201412095Y (en) | 2009-06-02 | 2009-06-02 | Two-way well flushing valve for horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201412095Y true CN201412095Y (en) | 2010-02-24 |
Family
ID=41713981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200462607U Expired - Fee Related CN201412095Y (en) | 2009-06-02 | 2009-06-02 | Two-way well flushing valve for horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201412095Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016977A (en) * | 2021-10-29 | 2022-02-08 | 德州众凯石油科技有限公司 | Well control type suspension sieve tube and well completion process |
| CN116065990A (en) * | 2023-03-03 | 2023-05-05 | 纬达石油装备有限公司 | Horizontal well annulus cleaning sand remover and application method thereof |
-
2009
- 2009-06-02 CN CN2009200462607U patent/CN201412095Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016977A (en) * | 2021-10-29 | 2022-02-08 | 德州众凯石油科技有限公司 | Well control type suspension sieve tube and well completion process |
| CN116065990A (en) * | 2023-03-03 | 2023-05-05 | 纬达石油装备有限公司 | Horizontal well annulus cleaning sand remover and application method thereof |
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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: 20100224 Termination date: 20180602 |