CN202348227U - Pluggable leakage prevention valve for oil layer - Google Patents
Pluggable leakage prevention valve for oil layer Download PDFInfo
- Publication number
- CN202348227U CN202348227U CN2011204653263U CN201120465326U CN202348227U CN 202348227 U CN202348227 U CN 202348227U CN 2011204653263 U CN2011204653263 U CN 2011204653263U CN 201120465326 U CN201120465326 U CN 201120465326U CN 202348227 U CN202348227 U CN 202348227U
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- valve
- overcoat
- plate
- prevention valve
- switch
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Abstract
The utility model relates to a pluggable leakage prevention valve for an oil layer. The leakage prevention valve mainly comprises an upper joint, an outer sleeve, a plate valve, a lower joint and the like, and is characterized in that an upper guide head and an elastic jaw seat connected with the upper guide head are arranged in the upper joint; the elastic jaw seat is in threaded connection with a switch sleeve; a locking jaw is connected with the switch sleeve; a locking ring is sleeved on the excircle of the locking jaw; pressure balancing holes, of which the number is equal to that of pressure balancing holes in the switch sleeve, are formed in the circumference of the outer sleeve; at least four seal rings are arranged between the switch sleeve and the outer sleeve; a valve seat is connected into the lower joint below the switch sleeve; a valve plate is arranged on the valve seat through a pin shaft; and a return spring is arranged on the pin shaft. The utility model has the advantages that completion fluid leakage is reduced, the oil layer is prevented from being contaminated, the operation procedure is simplified, the operation time is saved, the operation efficiency is improved, and the operation cost is reduced; the leakage prevention valve is designed with a large drift diameter, thereby allowing a conventional pipe column to freely penetrate through; and the plate valve can be opened repeatedly through a special tool and can be made of drillable material, so that when the plate valve cannot be opened through the special tool, the plate valve can be quickly drilled out through a drill bit.
Description
Technical field
The utility model belongs to the oilfield well completion technical field, particularly relates to a kind of insertable oil reservoir lost circulation prevention valve.
Background technology
In present known brill completion practice, field produces adopts open type productive completion system more.During conventional sand control completion operation, for the balance formation pore pressure, prevent the generation of overflow from will constantly in pit shaft, pour into completion fluid, the completion fluid that leakage is gone in the reservoir not only can pollute reservoir, has also increased the completion cost simultaneously.In addition, if the completion fluid perfusion is untimely, also might cause the generation of overflow even gas blowout accident.The existing lost circulation prevention valve that is used for the packing oil well mainly adopts ball-valve structure, and during production operation, special tool is opened under needing, and the oil field could produce; During the later stage operation, need special tool to open,, therefore possibly when the later stage operation, can produce some influences because the ball valve latus rectum is less; When adopting special tool to open ball valve, need take bit drills to fall ball valve, but, therefore can increase task difficulty because ball valve is an entity structure.At present, the valve seat of lost circulation prevention valve adopts pin to be connected with lower contact in the airtight in the world productive completion system, during operation; Can only valve seat be destroyed, valve plate and valve seat together squeezed into the shaft bottom after cutting off pin, valve plate only limits to disposable use; And quotation is high; Delivery date is long, and is difficult in maintenance, and then increased considerably the Oilfield developing cost.
The utility model content
The utility model can be lowered to sand control pipe for the technical problem that exists in the solution known technology provides a kind of;, the sand control service aid can close automatically after extracting; Guarantee that the fluid that sand control treatment finishes in the pit shaft of upper back can be not inner to the stratum through the lost circulation prevention valve leakage, and can bear the insertable oil reservoir lost circulation prevention valve of unidirectional pressure reduction.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
Insertable oil reservoir lost circulation prevention valve mainly comprises top connection, overcoat, plate valve and lower contact, and said top connection is through the transition joint overcoat that is threaded; Said overcoat is through the lower contact that is threaded; It is characterized in that: be provided with guide head and connected elastic claw seat in the top connection, the elastic claw seat overlaps through being threaded with the switch that exterior periphery is provided with pressure compensation opening, and lock pawl overlaps through being threaded with switch; Suit lock ring on the lock pawl one end cylindrical; Have the pressure compensation opening with switch cover pressure balance hole equivalent amount on the overcoat circumference, be provided with at least four road sealing rings between switch cover and the overcoat, in the lower contact below the switch cover through the valve seat that is threaded; Through bearing pin valve plate is housed on the valve seat, back-moving spring is housed on bearing pin.The utility model can also adopt following technical scheme:
The valve plate of said plate valve and valve base sealing are the line contact sealing of cambered surface and bevel edge.
Be shaped on the fitting recess that matches with lock pawl on the said transition joint inwall.
Also be provided with sealing ring between said transition joint and the overcoat.
Suitable for reading in the said upward guide head is bell.
Advantage and the good effect that the utlity model has are: because the utility model adopts technique scheme, when production operation, need not to be lowered to instrument again, simplify operation procedure, save the activity duration, improve operating efficiency; When the later stage, operation needed, connection special switch instrument pressed down valve plate is opened in the working string lower end, because this lost circulation prevention valve is designed to big latus rectum, conventional tubing string is freely passed through; When adopting special tool to open ball valve, can valve plate be bored fast through drill bit.During sand control treatment, because the operation in the tubing string of center of sand control crossover tool, the valve plate of plate valve is in open mode, can not influence sand control treatment.After sand control treatment finished, the sand control crossover tool tripped out tubing string, and valve plate is closed around bearing pin under the effect of back-moving spring automatically, need not like this valve seat is destroyed, and this lost circulation prevention valve can use repeatedly, and then has reduced operating cost.In addition, valve plate and valve seat are taked the line contact structures of cambered surface and bevel edge, under the effect of upper liquid pressure, form sealing surface.In addition, be provided with the O RunddichtringO between valve seat and the overcoat, thereby isolated top pit shaft and stratum; In follow-up completion practice; The liquid of guaranteeing not have the top pit shaft flows on earth in the layer, and the protection reservoir is not contaminated, practices thrift completion fluid waste and operating cost simultaneously.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1, top connection; 2, go up guide head; 3, elastic claw seat; 4, switch cover; 4-1, pressure compensation opening; 5, lock pawl; 6, transition joint; 7, sealing ring; 8, overcoat; 8-1, pressure compensation opening; 9, lock ring; 10, valve plate; 11, bearing pin; 12, back-moving spring; 13, sealing ring; 14, sealing ring; 15, valve seat; 16, securing member; 17, pin; 18, lower contact.
The specific embodiment
For further understanding utility model content, characteristics and the effect of the utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:
See also Fig. 1; Insertable oil reservoir lost circulation prevention valve; Comprise top connection 1, switch cover 4, overcoat 8, plate valve and lower contact 18 parts; Said top connection is through transition joint 6 overcoat 8 that is threaded, and said overcoat one end is connected lower contact through screw thread with securing member 16, is provided with O type rubber seal 13 between its external sleeve and the lower contact.The elastic claw seat 3 that is provided with guide head 2 in the said top connection and is threaded with it, suitable for reading in the said upward guide head 2 is bell.Said lock pawl seat one end outside is provided with the switch cover 4 and the lock pawl 5 that is connected with the switch external threading, suit lock ring 9 on the said lock pawl one end cylindrical that has pressure compensation opening 4-1 on its circumference.Said plate valve is to be made up of valve seat 15, valve plate 10, bearing pin 11 and back-moving spring 12; Said valve seat 15 is connected through the lower contact of screw thread with switch cover below; And fastening through pin 17, said valve seat 15 is equipped with valve plate 10 through bearing pin 11, and back-moving spring 12 is housed on bearing pin.Have the pressure compensation opening 8-1 that overlaps pressure balance hole equivalent amount with switch on said overcoat 8 circumference, be used for the pressure reduction that balance valve plate 10 is opened preceding top and bottom, to guarantee the valve plate smooth opening.Be shaped on the fitting recess that matches with lock pawl on the said transition joint inwall, between transition joint and overcoat, also be provided with O RunddichtringO 7.Be placed at switch and be provided with four road O type rubber seal 14 between the overcoat at least, guarantee that liquid do not miss the shaft bottom.Switch puts and is designed with pressure compensation opening 4-1, can connect with the balance pipe that puts outward, and the pressure reduction of balance top and bottom when valve plate is not opened guarantees the valve plate smooth opening.Through the valve seat 15 that has been threaded, lower contact and valve seat are also fastening by pin 17, through bearing pin 11 valve plate 10 are housed on the said valve seat, and back-moving spring 12 is housed on bearing pin in the lower contact 18 below the switch cover.Said valve plate and valve base sealing are the line contact sealing of cambered surface and bevel edge, and after insertable lost circulation prevention valve valve plate was closed, valve plate lower camber side and summit, valve seat inclined-plane constituted line contact sealing, under the effect of forward pressure reduction, can isolate top pit shaft and stratum.
The operating principle of the utility model is:
The button-type up and down of the utility model instrument is API standard button-type, is convenient to like this and being connected of on-the-spot other instrument.The central tube of sand control pipe is inserted into (valve plate 10 is in open mode) in the lost circulation prevention valve, and instrument is with a whole set of sand control pipe G.I.H.In normal sand control treatment, the lost circulation prevention valve is in open mode always, does not influence normal sand control treatment.After sand control treatment finished, along with extracting of central tube, valve plate around bearing pin 11 rotation, contacted rear valve body with bevel edge line on the valve seat 15 and closes under the effect of back-moving spring 12.At this moment, because upper end tubing string internal memory is at fluid column, under the head of liquid effect, valve plate closely contacts with valve seat, can reach the better seal effect.In addition; Seal through the O RunddichtringO between valve seat and the lower contact; Between lower contact and the overcoat through O RunddichtringO sealing, thereby come in space more than the valve plate and following formation isolation, the liquid of guaranteeing not have the top pit shaft flows on earth in the layer; The protection reservoir is not contaminated, practices thrift completion fluid waste and operating cost simultaneously.When the later stage, operation needed; Connect the special switch instrument in the working string lower end, tubing string presses down that to make that switch overlaps 4 descending, when pressure compensation opening 4-1 that switch puts when pressure compensation opening 8-1 on the overcoat 8 matches; Balance lost circulation prevention valve is pressure reduction up and down; Continue to press down working string, make valve plate rotate, open valve plate along bearing pin.This moment, whole tubing string inside was unimpeded, can carry out other operation.
Claims (5)
1. an insertable oil reservoir lost circulation prevention valve mainly comprises top connection, overcoat, plate valve and lower contact, and said top connection is through the transition joint overcoat that is threaded; Said overcoat is through the lower contact that is threaded; It is characterized in that: be provided with guide head and connected elastic claw seat in the top connection, the elastic claw seat overlaps through being threaded with the switch that exterior periphery is provided with pressure compensation opening, and lock pawl overlaps through being threaded with switch; Suit lock ring on the lock pawl one end cylindrical; Have the pressure compensation opening with switch cover pressure balance hole equivalent amount on the overcoat circumference, be provided with at least four road sealing rings between switch cover and the overcoat, in the lower contact below the switch cover through the valve seat that is threaded; Through bearing pin valve plate is housed on the valve seat, back-moving spring is housed on bearing pin.
2. insertable oil reservoir lost circulation prevention valve according to claim 1, it is characterized in that: the valve plate of said plate valve and valve base sealing are the line contact sealing of cambered surface and bevel edge.
3. insertable oil reservoir lost circulation prevention valve according to claim 1 is characterized in that: be shaped on the fitting recess that matches with lock pawl on the said transition joint inwall.
4. insertable oil reservoir lost circulation prevention valve according to claim 3 is characterized in that: also be provided with sealing ring between said transition joint and the overcoat.
5. insertable oil reservoir lost circulation prevention valve according to claim 1 is characterized in that: suitable for reading in the said upward guide head is bell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204653263U CN202348227U (en) | 2011-11-21 | 2011-11-21 | Pluggable leakage prevention valve for oil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204653263U CN202348227U (en) | 2011-11-21 | 2011-11-21 | Pluggable leakage prevention valve for oil layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202348227U true CN202348227U (en) | 2012-07-25 |
Family
ID=46537236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204653263U Expired - Fee Related CN202348227U (en) | 2011-11-21 | 2011-11-21 | Pluggable leakage prevention valve for oil layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202348227U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400662A (en) * | 2011-11-21 | 2012-04-04 | 中国海洋石油总公司 | Pluggable oil-layer anti-leakage valve |
-
2011
- 2011-11-21 CN CN2011204653263U patent/CN202348227U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400662A (en) * | 2011-11-21 | 2012-04-04 | 中国海洋石油总公司 | Pluggable oil-layer anti-leakage valve |
| CN102400662B (en) * | 2011-11-21 | 2015-04-22 | 中国海洋石油总公司 | Pluggable oil-layer anti-leakage valve |
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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: 20120725 Termination date: 20161121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |