CN201236669Y - Oil layer protection valve - Google Patents
Oil layer protection valve Download PDFInfo
- Publication number
- CN201236669Y CN201236669Y CNU200820109770XU CN200820109770U CN201236669Y CN 201236669 Y CN201236669 Y CN 201236669Y CN U200820109770X U CNU200820109770X U CN U200820109770XU CN 200820109770 U CN200820109770 U CN 200820109770U CN 201236669 Y CN201236669 Y CN 201236669Y
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- China
- Prior art keywords
- protection valve
- shield
- upper shield
- oil layer
- sliding sleeve
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Abstract
The utility model relates to an oil layer protection valve which mainly comprises an upper shield and a lower shield; an inner slide sleeve is mounted inside the upper shield; the lower end of the upper shield is connected with an adjustable buckle joint B connected with a blanking plug working cylinder and a guide head positioned inside the lower shield; the lower end of the lower shield is connected with an adjustable buckle joint A; the upper shield is fixed to the inner sliding sleeve through a position limiting pin; oval circulation ports are formed at the lower end of the inner slide sleeve and the lower end of the upper shield; and a housing seal assembly acting as a one-way valve is arranged in a cavity formed by the interior of the lower shield and the adjustable buckle joint B. The utility model can ensure that no stratum fluid flows into an upper part well shaft through the oil protection valve, and no fluid from the upper part well shaft leaks into an oil layer protection valve inside the stratum through the oil protection valve during the lifting and the lowering of a production pipe column. Meanwhile, the utility model can bear the difference between the upper pressure and the lower pressure, and ensure downhole safety during well completion and well repairing operation. Furthermore, the utility model has the advantages of simple structure, convenient operation and low manufacturing cost.
Description
Technical field
The utility model belongs to the oilfield well completion technical field, relate to particularly that a kind of oilfield well completion work production uses simple in structure, be convenient to operate and safe and reliable oil layer protection valve.
Background technology
In present known brill completion practice, field produces adopts open type productive completion system more.Downhole safety in order to ensure production period, to have cable-passing packer on the conventional completion flow string, during being lowered to and tripping out flow string, for the balance formation pore pressure, prevent the generation of overflow, to 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.If the completion fluid perfusion is untimely, also might cause the generation of overflow even gas blowout accident.Formation fluid meeting and production casing contact during oil well production, if formation fluid has corrosivity, just need to adopt etch-proof sleeve pipe, thereby increase the expense of tubing widely.At present in the world, oil layer protection valve and airtight productive completion systematic research had some successful examples, but an external cover oil layer protection valve quotation is higher, and delivery date is long, and is difficult in maintenance, and the Oilfield developing cost is increased significantly.The more important thing is, there is tangible limitation in similar products in the market, can't during producing maintenance, carry out steel wire operation, earlier flow string is tripped out pit shaft if want to carry out steel wire operation with regard to stopping production, be lowered to special tool and open bottom tubing string passage, just can carry out the steel wire operation of bottom then.
Summary of the invention
The utility model can be closed after flow string is extracted for the technical problem that exists in the solution known technology provides a kind of; and can bear pressure reduction up and down; guarantee to remove not having formation fluid during the flow string and enter into the top pit shaft by the oil layer protection valve, the fluid in the pit shaft of top also can be by the oil layer protection valve of oil layer protection valve leakage in the stratum.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: the oil layer protection valve; mainly comprise upper shield and lower shield; inner sliding sleeve is installed in the upper shield; the upper shield lower end connects change snapping head B; become snapping head B and connect the blanking plug seating nipple that is positioned at lower shield oil layer protection valve main channel; supporting blanking plug and guide head; the lower shield lower end connects change snapping head A; it is characterized in that: fix by position-limitting pin between upper shield and the inner sliding sleeve; inner sliding sleeve lower end and upper shield lower end all are shaped on circulation port, are provided with the overcoat seal assembly that plays the one way valve effect in lower shield with in the cavity that becomes snapping head B formation.
The utility model can also adopt following technical scheme:
Described overcoat seal assembly comprises: be sleeved on the ball seat base plate on the reducer union B undergauge section outer wall, ball limiting plate, bead and O RunddichtringO are housed on the ball seat base plate, play the effect of one way valve, only allow fluid to flow from the bottom up, then cannot in the other direction.
Described inner sliding sleeve lower end and upper shield lower end all are shaped on circulation port.
Described inner sliding sleeve near upper end also be shaped on can with the groove of jump ring effect, lower shoulder is a bevelled shoulder on the groove.
The upper shield inwall is shaped on interior shoulder, is shaped on outer shoulder on the inner sliding sleeve outer wall, in the space between the shoulder back-moving spring is installed outside shoulder and the inner sliding sleeve in upper shield.
The back-moving spring of adorning in the space in the upper shield between shoulder and the outer shoulder of inner sliding sleeve is positioned at above the flow channel, and the flow channel back-moving spring of not flowing through.
Blanking plug seating nipple and blanking plug are equipped with in bottom, oil layer protection valve main channel, and blanking plug can be opened and reclaim by the ground steel wire operation.
Advantage and the good effect that the utlity model has are: because the utility model adopts technique scheme, fix by position-limitting pin between inner sliding sleeve and the upper shield, prevent that inner sliding sleeve from rotating in a circumferential direction in upper shield, inner sliding sleeve can guarantee the situation lower slider of sealing in upper shield, all there is circulation port the lower end of inner sliding sleeve and upper shield.Inner sliding sleeve is under the downforce effect of flow string insert head, and the inner sliding sleeve compression reseting spring arrives certain position, the fluid passage at inner sliding sleeve and upper shield upper and lower side circulation port place is opened, thereby set up the circulation canal of fluid.When the fluid passage was opened in the coincidence of the circulation port position of inner sliding sleeve and upper shield, following the correcting of inner sliding sleeve arrived the bottleneck that the low sleeve lower end connects change snapping head, plays position-limiting action.The overcoat seal assembly of being made up of ball limiting plate, bead, O RunddichtringO etc. can play the effect of one way valve, only allows fluid to flow from the bottom up, then cannot in the other direction.After the production insert head proposed the oil layer protection valve with flow string, oil layer protection valve inner sliding sleeve moved on the upper shield under action of reset spring relatively, and circulation port is closed.Guarantee to remove not having formation fluid during the flow string and enter into the top pit shaft by the oil layer protection valve, the fluid in the pit shaft of top also can be by the oil layer protection valve of oil layer protection valve leakage in the stratum.Can bear simultaneously pressure reduction up and down, guarantee the accurate and safety of operating.The utility model is not only simple in structure, be convenient to operation and low cost of manufacture.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1, become snapping head A; 2, guide head; 3, lower shield; 4, blanking plug seating nipple; 5, ball seat base plate; 6, O RunddichtringO; 7, bead; 8, ball limiting plate; 9, become snapping head B; 10, O RunddichtringO; 11, upper shield; 11-1, interior shoulder; 12, inner sliding sleeve; 12-1, outer shoulder; 12-2, groove; 13, back-moving spring; 14, O RunddichtringO; 15, position-limitting pin; 16, shear pin; 17, circulation port; 18, blanking plug.
The specific embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1; the oil layer protection valve; mainly comprise upper shield 11 and lower shield 3; the two is equipped with inner sliding sleeve 12 by the middle screwed connection of upper shield in the upper shield, the upper shield lower end connects change snapping head 9B; become snapping head 9B and connect blanking plug seating nipple 4 and the guide head 2 that is positioned at lower shield; the lower shield lower end connects change snapping head 1A, and is fixing by position-limitting pin 15 between upper shield and the inner sliding sleeve, rotates in a circumferential direction in upper shield to prevent inner sliding sleeve.The upper shield inwall is shaped on interior shoulder 11-1, is shaped on outer shoulder 12-1 on the inner sliding sleeve outer wall, the back-moving spring 13 of packing in the space between the shoulder 12-1 outside shoulder 11-1 and the inner sliding sleeve in upper shield.Inner sliding sleeve lower end and upper shield lower end all are shaped on and are oval shape and measure-alike circulation port 17, and the circulation port of described inner sliding sleeve lower end and upper shield lower end is four.In lower shield with in the cavity that becomes snapping head 9B formation, be provided with the overcoat seal assembly that plays the one way valve effect, this overcoat seal assembly comprises: be sleeved on the ball seat base plate 8 on the reducer union 9B undergauge section outer wall, ball limiting plate 8, bead 7 and O RunddichtringO 6 and 10 are installed on the ball seat base plate 5.Described inner sliding sleeve also is shaped on the groove 12-2 that is used for equipped jump ring near upper end, between upper shield 11 and the inner sliding sleeve 12 O RunddichtringO 14 is housed also.The back-moving spring of adorning in the space in the upper shield between shoulder and the outer shoulder of inner sliding sleeve is positioned at above the flow channel, and the flow channel back-moving spring of not flowing through.Relative oil layer protection valve body moves down under the insert head suppressing action when inner sliding sleeve is being produced; circulation port position on inner sliding sleeve circulation port and the upper shield is overlapped when opening the annular fluid passage; following the correcting of inner sliding sleeve arrives the bottleneck that the upper shield lower end connects change snapping head 9B, plays position-limiting action.After will producing insert head and proposing the oil layer protection valve, inner sliding sleeve moves under action of reset spring, closes flow channel automatically, cuts off the flow channel between external fluid and the payzone fluid, stops the external fluid payzone that bleeds to cause pollution.Blanking plug seating nipple 4 and blanking plug 18 are equipped with in bottom, oil layer protection valve main channel, and blanking plug can be opened and reclaim by the ground steel wire operation.
With the keyway insertion upper shield 11 of the instrument of removing along upper shield 11 the insides, pressing down the instrument of removing then overlaps until instrument of removing and 16 holes of the shear pin above the upper shield 11, insert from shear pin 16 holes that shear pin (shearing force is as required set the quantity of shear pin) will remove instrument and upper shield 11 couples together, circulation ports 17 above this moment inner sliding sleeve 12 and the upper shield 11 partially overlap, and can be used as circulation canal and make tubing string set up circulation (positive and negative circulation all can) in being lowered to process.
Operating principle of the present utility model is: the button-type up and down of the utility model oil layer protection valve is API standard button-type, is convenient to like this and being connected of other on-the-spot instrument and pipeline etc.Oil layer protection valve lower shield 3 lower ends link to each other with grappling insertion sealing by becoming snapping head 1A, are lowered to by the special use instrument of removing, and make the oil layer protection valve insert sealing and fixing in top packer by grappling.Producing insert head is lowered to flow string, press down inner sliding sleeve 12 by gravity, the resistance that makes inner sliding sleeve overcome back-moving spring 13 moves down in upper shield 11, when inner sliding sleeve moves down into the lower end and arrives to the bottleneck that becomes snapping head 9B, circulation port 17 on inner sliding sleeve and the upper shield overlaps, and has then set up the up production passage of formation fluid.When on carry flow string and drive to produce insert head, back-moving spring 13 and push-down head under the double action with jump ring, sliding on the inner sliding sleeve 12, thereby flow channel is closed, inner sliding sleeve 12 is in the effect lower limit of position-limitting pin 15, the groove of the jump ring effect up and down bevelled shoulder jump ring being convenient to produce on the insert head shrinks in the process and pulls out last carrying, thereby guarantees the safety and the accuracy of operating.When needs need overhaul to the bottom completion tubular column; need trip out the top flow string, reclaim tool lock stand oil layer protective valve with the oil layer protection valve, rotation is freed the top packer grappling and is inserted sealing; reclaim the oil reservoir protective valve, can carry out the heavy repair task of follow-up bottom tubing string then.
Claims (7)
1. oil layer protection valve; mainly comprise upper shield and lower shield; inner sliding sleeve is installed in the upper shield; the upper shield lower end connects change snapping head B; become snapping head B connection and be positioned at the blanking plug seating nipple of lower shield oil layer protection valve main channel, supporting blanking plug and guide head; the lower shield lower end connects change snapping head A; it is characterized in that: fix by position-limitting pin between upper shield and the inner sliding sleeve; inner sliding sleeve lower end and upper shield lower end all are shaped on circulation port, are provided with the overcoat seal assembly that plays the one way valve effect in lower shield with in the cavity that becomes snapping head B formation.
2. oil layer protection valve according to claim 1 is characterized in that: described overcoat seal assembly comprises: be sleeved on the ball seat base plate on the reducer union B undergauge section outer wall, ball limiting plate, bead and O RunddichtringO are housed on the ball seat base plate.
3. oil layer protection valve according to claim 1 is characterized in that: described inner sliding sleeve lower end and upper shield lower end all are shaped on circulation port.
4. oil layer protection valve according to claim 1 is characterized in that: described inner sliding sleeve near upper end also be shaped on can with the groove of jump ring effect, lower shoulder is a bevelled shoulder on the groove.
5. oil layer protection valve according to claim 1 is characterized in that: the upper shield inwall is shaped on interior shoulder, is shaped on outer shoulder on the inner sliding sleeve outer wall, in the space between the shoulder back-moving spring is installed outside shoulder and the inner sliding sleeve in upper shield.
6. oil layer protection valve according to claim 1 is characterized in that: the back-moving spring of dress is positioned at the flow channel top in the space in the upper shield between the outer shoulder of shoulder and inner sliding sleeve.
7. oil layer protection valve according to claim 1 is characterized in that: blanking plug seating nipple and blanking plug are equipped with in bottom, oil layer protection valve main channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820109770XU CN201236669Y (en) | 2008-08-11 | 2008-08-11 | Oil layer protection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820109770XU CN201236669Y (en) | 2008-08-11 | 2008-08-11 | Oil layer protection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201236669Y true CN201236669Y (en) | 2009-05-13 |
Family
ID=40649408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820109770XU Expired - Fee Related CN201236669Y (en) | 2008-08-11 | 2008-08-11 | Oil layer protection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201236669Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103299027A (en) * | 2011-01-14 | 2013-09-11 | 哈利伯顿能源服务公司 | Rotational test valve with tension reset |
| CN110905456A (en) * | 2018-09-18 | 2020-03-24 | 中国石油天然气股份有限公司 | Pressure delay ball throwing device |
-
2008
- 2008-08-11 CN CNU200820109770XU patent/CN201236669Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103299027A (en) * | 2011-01-14 | 2013-09-11 | 哈利伯顿能源服务公司 | Rotational test valve with tension reset |
| CN103299027B (en) * | 2011-01-14 | 2016-03-16 | 哈利伯顿能源服务公司 | There is the rotational test valve of tension reset |
| CN110905456A (en) * | 2018-09-18 | 2020-03-24 | 中国石油天然气股份有限公司 | Pressure delay ball throwing device |
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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: 20090513 Termination date: 20160811 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |