CN105569621B - Underground throttle - Google Patents
Underground throttle Download PDFInfo
- Publication number
- CN105569621B CN105569621B CN201410528057.9A CN201410528057A CN105569621B CN 105569621 B CN105569621 B CN 105569621B CN 201410528057 A CN201410528057 A CN 201410528057A CN 105569621 B CN105569621 B CN 105569621B
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- Prior art keywords
- center
- pole
- sub
- projection
- throttle device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims abstract description 27
- 239000007937 lozenge Substances 0.000 claims description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003345 natural gas Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000338 in vitro Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Gasket Seals (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses an underground throttle, and belongs to the technical field of natural gas exploitation of oil fields. The underground throttleer comprises a first central rod, a second central rod, a releasing head, a body and a guiding head which are sequentially connected, and further comprises a check ring, an elastic slip structure, an upper sealing element, a lower framework, a lower sealing element, a sealing starting block, a spring and a limit stop, wherein the upper sealing element, the lower framework, the sealing starting block, the spring and the limit stop are sequentially arranged between the other ends of the wedge-shaped convex blocks and the body, the second central rod is sequentially provided with a first convex block and a second convex block along the direction from the releasing head to the guiding head, first through holes which are opposite to the first convex blocks are correspondingly formed in the sealing starting block and the body, second through holes which are opposite to the second convex blocks are correspondingly formed in the limit stop and the body, and limiting parts are respectively placed in the first. The underground throttler provided by the invention can be smoothly salvaged out of the underground.
Description
Technical field
The present invention relates to Oilfield Natural Gas Plant production technique field, more particularly to a kind of underground throttle device.
Background technology
During natural gas enters ground flow from stratum through pit shaft, if there is high pressure, low temperature and aqueous situation, pole
Hydrate is also easy to produce, pressure is higher, and the generation temperature of hydrate is higher, easier generation Hydrate Plugging, so as to block pit shaft
Flow string and surface line, influence gas well liquid loading.
Underground throttle device is arranged on appropriate location in oil pipe by Downhole Choking Technology, it is possible to achieve the throttling drop in pit shaft
Pressure, while the cryogenic natural gas after the throttling of stratum energy heats can be utilized, reduce the gas pressure and hydrate after throttling
Temperature is produced, prevents from forming Hydrate Plugging so as to reach, improves the purpose of gas well liquid loading.
During the present invention is realized, inventor has found that prior art at least has problems with：
Existing underground throttle device is during salvaging, and seal is in softened state all the time, to beating for underground throttle device
Drag for and add certain difficulty.
The content of the invention
In order to solve the problems, such as that prior art adds certain difficulty to the salvaging of underground throttle device, the embodiment of the present invention carries
A kind of underground throttle device is supplied.The technical scheme is as follows：
The embodiments of the invention provide a kind of underground throttle device, the underground throttle device is included in the first center-pole, second
Core bar and the back-off sub being sequentially connected, the body of tubular, guide head, first center-pole connect with second center-pole
Connect, the body is set in the outside of first center-pole and second center-pole, and first center-pole, described
Two center-poles, the axis of the body are overlapped, and one end of the back-off sub is connected with one end of the body by pin, described
The middle part of body is provided with wedge shaped projection, and the external diameter of the wedge shaped projection gradually increases along the back-off sub to the direction of the guide head
Greatly, the flow controller also includes：
Back-up ring, it is fixed on one end being connected with the back-off sub of the body；
Elastic card tile structure, the elastic card tile structure are arranged on the body and are located at the back-up ring and the wedge shape
Between projection；
And be successively set on the upper seal between the other end of the wedge shaped projection and the body, lower skeleton, under
Seal, sealing start block, elastic component, positive stop, the upper seal, the lower skeleton, the lower seal, described close
Envelope starts block, the elastic component, the positive stop and is set in described in vitro；
Wherein, second center-pole is sequentially provided with the first projection, along the back-off sub to the direction of the guide head
Two projections, the sealing starts correspondingly offers the first through hole relative with first projection on block and the body, described
Correspondingly offer second through hole relative with second projection on positive stop and the body, the first through hole and described
Finite place piece is placed respectively in second through hole；
The elastic card tile structure cooperates with the wedge shaped projection, when the relatively described wedge shape of the elastic card tile structure
Projection to the guide head move when, the wedge shaped projection drives the elastic card tile structure to open, when the elastic slips knot
Structure relative to the wedge shaped projection to the back-off sub move when, the elastic card tile structure shrinks.
In a kind of possible implementation of the present invention, the elastic card tile structure includes：
Slip sleeve, described is slideably set in vitro and between the back-up ring and the wedge shaped projection；
Some slip inserts, along the equiangularly spaced setting in the direction of the outer contour of the cross section of the body, the slips
One end of tooth is stuck in the slip sleeve；
Stage clip, on the body, one end of the stage clip to be fixed on the slips by some slip insert pressures
In set.
Alternatively, the number of some slip inserts is 3.
In the alternatively possible implementation of the present invention, axial notch is offered in one end of the back-off sub, it is described
One end of first center-pole is inserted in the axial notch, and one end of the body is set in outside one end of the back-off sub, institute
State one end of body, one end of the back-off sub, one end of first center-pole are connected by pin together.
In another possible implementation of the invention, circumferential recess is offered in the middle part of the back-off sub.
In another possible implementation of the invention, the flow controller also includes ring spring, and the ring spring vulcanization is in institute
State in upper seal.
In another possible implementation of the invention, the flow controller also includes O-ring seal, the O-shaped sealing
Circle is arranged between the body and first center-pole.
In another possible implementation of the invention, the lower skeleton sulfides with the lower seal, branch
Support the lower seal.
In another possible implementation of the invention, the sealing starts block and the lower seal is respectively equipped with phase
The lozenges mutually coordinated, and the lozenges that the sealing starts block is located in lower seal.
In another of the invention possible implementation, be provided with internal thread in the guide head, the body with it is described
One end of guide head connection is provided with the external screw thread matched with the internal thread in the guide head.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
By being sequentially provided with the first projection, the second projection on the second center-pole, correspondingly offered on positive stop and body
Second through hole relative with the second projection, finite place piece is placed in the second through hole, during salvaging, locating part is from the second projection
Place is fallen into the groove between the first projection and the second projection, and spring part recovers, and elastic force is released, and seal shrinks, flow controller
Smoothly salvage from underground.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the structural representation of underground throttle device provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment
The embodiments of the invention provide a kind of underground throttle device, referring to Fig. 1, the underground throttle device include the first center-pole 1,
Second center-pole 2 and the back-off sub 3 being sequentially connected, the body 4 of tubular, guide head 5.First center-pole 1 and the second center-pole
2 connections, body 4 are set in the outside of the first center-pole 1 and the second center-pole 2, and the first center-pole 1, the second center-pole 2, sheet
The axis of body 4 is overlapped, and one end of back-off sub 3 is connected with one end of body 4 by pin, and the middle part of body 4 is provided with wedge shaped projection
4a, wedge shaped projection 4a external diameter gradually increase along back-off sub 3 to the direction of guide head 5.The flow controller also includes：
Back-up ring 6, it is fixed on one end being connected with back-off sub 3 of body 4；
Elastic card tile structure, elastic card tile structure are set on body 4 and between back-up ring 6 and wedge shaped projection 4a；
And it is successively set on upper seal 7 between the other end of wedge shaped projection 4a and body 4, lower skeleton 8, lower sealing
Part 9, sealing start block 10, elastic component 11, positive stop 12, and upper seal 7, lower skeleton 8, lower seal 9, sealing start block
10th, elastic component 11, positive stop 12 are set in outside body 4；
Wherein, the second center-pole 2 is sequentially provided with the first projection, the second projection along back-off sub 3 to the direction of guide head 5, close
Envelope, which starts, correspondingly offers the first through hole relative with the first projection on block 10 and body 4, corresponding on positive stop 12 and body 4
Second through hole relative with the second projection is offered, finite place piece 13 is placed respectively in first through hole and the second through hole；
Elastic card tile structure and wedge shaped projection 4a cooperate, when elastic card tile structure opposite wedge projection 4a is to guide head
During 5 movement, wedge shaped projection 4a drives elastic card tile structure to open, when elastic card tile structure opposite wedge projection 4a is to back-off sub 3
When mobile, elastic card tile structure shrinks.
It is to be appreciated that the axial width of the first projection is more than the axial width of the second projection, to prevent on the first projection
Locating part when falling into the groove between the first projection and the second projection, the locating part on the second projection is also fallen into groove.
Alternatively, the first projection, the second projection can be the circumferential annular lug along the second center-pole 2.
Alternatively, wedge shaped projection 4a can be the circumferential annular lug along body 4.
Alternatively, elastic component 11 can be spring.
Alternatively, locating part 13 can be steel ball.
Alternatively, the other end in addition to the one end being connected with body 4 of back-off sub 3 can be provided with running tool in
The external screw thread of screw thread matching.
In a kind of implementation of the present embodiment, elastic card tile structure can include：
Slip sleeve 14, slideably it is set in outside body 4 and between back-up ring 6 and wedge shaped projection 4a；
Some slip inserts 15, along the equiangularly spaced setting in outer contour direction of the cross section of body 4, the one of slip insert 15
End is stuck in slip sleeve 14；
Stage clip 16, for some slip inserts 15 to be pressed in into body 14, one end of stage clip 16 is fixed in slip sleeve 14.
Alternatively, the number of some slip inserts 15 can be 3, both saved the use of slip insert, and can also make throttling
Device is stable in underground.
In another implementation of the present embodiment, axial notch can be offered in one end of back-off sub 3, in first
One end of core bar 1 be may be inserted into axial notch, and one end of body 4 can be set in outside one end of back-off sub 3, and the one of body 4
End, one end of back-off sub 3, one end of the first center-pole 1 can be connected by pin together.Will only with a pin can
Body 4, back-off sub 3, the three of the first center-pole 1 are fixed together, simple and convenient.
Specifically, the pin can be copper pin.
In another implementation of the present embodiment, the middle part of back-off sub 3 can offer circumferential recess 3a, make to give up
Head is in dumbbell shaped, facilitates instrument (such as spanner) to clamp the back-off sub.
In another implementation of the present embodiment, the flow controller can also include ring spring 17, and ring spring 17 vulcanizes upper
In seal 7, increase the elasticity and intensity of upper seal 7.
In another implementation of the present embodiment, the flow controller can also include O-ring seal 18, O-ring seal
18 are arranged between the center-pole 1 of body 4 and first, by the gap seals between the center-pole 1 of body 4 and first.
In another implementation of the present embodiment, lower skeleton 8 can sulfide with lower seal 9, under support
Seal 9.Because the material of seal is generally the more soft material such as rubber, using the material that the hardness such as metalwork are larger
Lower skeleton 8 is made, lower seal 9 can be played a supporting role.
In another implementation of the present embodiment, sealing, which starts block 10 and lower seal 9, can be respectively equipped with mutually
The lozenges of cooperation, and the lozenges for sealing startup block 10 is located in lower seal 9, is easy to sealing to start block 9 in flow controller seat
Seal is promoted to swell during envelope.
In another implementation of the present embodiment, internal thread can be provided with guide head 5, body 4 connects with guide head 5
The external screw thread matched with the internal thread in guide head 5 can be provided with the one end connect.
, can in one end being connected with the second connecting rod 2 of the first center-pole 1 in another implementation of the present embodiment
So that one with the first center-pole 1 can be provided with provided with internal thread, on one end being connected with head rod 1 of the second center-pole 2
The external screw thread of internal thread matching in end.
The operation principle of the underground throttle device of offer of the invention is provided：
Flow controller is sent into underground by running tool, when flow controller reach needed for position when, running tool by back-off sub 3 slowly
Above carry, slip sleeve 14 and the opposing body 4 of some slip inserts 15 move to guide head 5, and some slip inserts 15 are along the middle part of body 4
The wedge shaped projection that external diameter gradually increases struts, and blocks tube inner wall.Then after confirming that slip spider is sealed, running tool is quickly above carried
And fixed body 4, back-off sub 3, the pin (now having given up) of the three of the first center-pole 1 are cut, now the second center-pole 2 exists
Moved under the drive of first center-pole 1 to back-off sub 3, the locating part 13 on the first projection fall into the first projection and the second projection it
Between groove in, elastic component 11 promote sealing start block 10, and then promote lower seal 9, lower skeleton 8, upper seal 7.Simultaneously
Because lower seal 9 plays certain initial sealing effect, therefore there is certain pressure differential, pressure in lower seal about 9
Promote upper seal 7 to be swollen into bell shape, seal.
When salvaging flow controller, fishing tool pushes the first center-pole 1, and the second center-pole 2 moves to guide head 5 therewith,
Locating part 13 on second projection is fallen into the groove between the first projection and the second projection, and elastic component 11 is released, and is no longer pushed away
Dynamic sealing starts block 10, and then lower seal 9 and upper seal 7 are shunk, and sealing releases.Meanwhile slip sleeve 14 and some slips
The opposing body 4 of tooth 15 moves to back-off sub 3, and some slip inserts 15 no longer block tube inner wall, and fishing tool can be smoothly by section
Stream device, which is smoothly salvaged, to be come.
The embodiment of the present invention is by being sequentially provided with the first projection, the second projection, positive stop and body on the second center-pole
Upper correspondence offers second through hole relative with the second projection, and finite place piece is placed in the second through hole, spacing during salvaging
Part is fallen at the second projection in the groove between the first projection and the second projection, and spring part recovers, and elastic force is released, seal
Shrink, flow controller is smoothly salvaged from underground.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of underground throttle device, the underground throttle device includes the first center-pole (1), the second center-pole (2) and connected successively
The back-off sub (3) that connects, the body (4) of tubular, guide head (5), first center-pole (1) with second center-pole (2) even
Connect, the body (4) is set in the outside of first center-pole (1) and second center-pole (2), and first center
Bar (1), second center-pole (2), the axis of the body (4) overlap, one end and the body of the back-off sub (3)
(4) one end is connected by pin, it is characterised in that the middle part of the body (4) is provided with wedge shaped projection (4a), and the wedge shape is convex
The external diameter of block (4a) gradually increases along the back-off sub (3) to the direction of the guide head (5), and the flow controller also includes：
Back-up ring (6), it is fixed on one end being connected with the back-off sub (3) of the body (4)；
Elastic card tile structure, the elastic card tile structure are set on the body (4) and are located at the back-up ring (6) and the wedge
Between shape projection (4a)；
And it is successively set on upper seal (7) between the other end of the wedge shaped projection (4a) and the body (4), sending down the fishbone
Frame (8), lower seal (9), sealing start block (10), elastic component (11), positive stop (12), the upper seal (7), described
Lower skeleton (8), the lower seal (9), the sealing start block (10), the elastic component (11), the positive stop (12)
It is set in the body (4) outside；
Wherein, it is convex along the back-off sub (3) to the direction of the guide head (5) to be sequentially provided with first for second center-pole (2)
Block, the second projection, the sealing, which starts, correspondingly offers relative with first projection the on block (10) and the body (4)
Second through hole relative with second projection is correspondingly offered on one through hole, the positive stop (12) and the body (4),
Finite place piece (13) is placed respectively in the first through hole and second through hole；
The elastic card tile structure cooperates with the wedge shaped projection (4a), when the relatively described wedge shape of the elastic card tile structure
Projection (4a) is to during the guide head (5) movement, and the wedge shaped projection (4a) drives the elastic card tile structure to open, when described
Relative to the wedge shaped projection (4a) to during the back-off sub (3) movement, the elastic card tile structure shrinks elastic card tile structure.
2. underground throttle device according to claim 1, it is characterised in that the elastic card tile structure includes：
Slip sleeve (14), slideably it is set in the body (4) outside and is located at the back-up ring (6) and the wedge shaped projection (4a)
Between；
Some slip inserts (15), along the equiangularly spaced setting in direction of the outer contour of the cross section of the body (4), the card
One end of watt tooth (15) is stuck in the slip sleeve (14)；
Stage clip (16), for some slip inserts (15) to be pressed in into the body (4), one end of the stage clip (16) is fixed
In the slip sleeve (14).
3. underground throttle device according to claim 2, it is characterised in that the number of some slip inserts (15) is 3.
4. underground throttle device according to claim 1, it is characterised in that offer axle in one end of the back-off sub (3)
To groove, one end of first center-pole (1) is inserted in the axial notch, and one end of the body (4) is set in described
Outside one end of back-off sub (3), one end of the body (4), one end of the back-off sub (3), the one of first center-pole (1)
End is connected by pin together.
5. underground throttle device according to claim 1, it is characterised in that offer circumference in the middle part of the back-off sub (3)
Groove (3a).
6. underground throttle device according to claim 1, it is characterised in that the flow controller also includes ring spring (17), described
Ring spring (17) vulcanizes in the upper seal (7).
7. underground throttle device according to claim 1, it is characterised in that the flow controller also includes O-ring seal (18),
The O-ring seal (18) is arranged between the body (4) and first center-pole (1).
8. underground throttle device according to claim 1, it is characterised in that the lower skeleton (8) and the lower seal (9)
Sulfide, support the lower seal (9).
9. underground throttle device according to claim 1, it is characterised in that the sealing starts block (10) and the lower sealing
Part (9) is respectively equipped with the lozenges of mutual cooperation, and the lozenges that the sealing starts block (10) is located in lower seal (9).
10. underground throttle device according to claim 1, it is characterised in that be provided with internal thread, institute in the guide head (5)
State one end that body (4) is connected with the guide head (5) and be provided with the outer spiral shell matched with the internal thread in the guide head (5)
Line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528057.9A CN105569621B (en) | 2014-10-09 | 2014-10-09 | Underground throttle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528057.9A CN105569621B (en) | 2014-10-09 | 2014-10-09 | Underground throttle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105569621A CN105569621A (en) | 2016-05-11 |
| CN105569621B true CN105569621B (en) | 2018-01-05 |
Family
ID=55880177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410528057.9A Active CN105569621B (en) | 2014-10-09 | 2014-10-09 | Underground throttle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105569621B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351619B (en) * | 2016-09-19 | 2019-03-12 | 西南石油大学 | One kind being used for natural gas well Underground Spiral throttling set |
| CN114687690B (en) * | 2022-03-31 | 2024-03-29 | 中海石油(中国)有限公司 | Slip setting mechanism and downhole throttler comprising same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201661284U (en) * | 2010-04-29 | 2010-12-01 | 泸州川油钻采工具有限公司 | Compound sealing underground throttling device |
| CN103742102A (en) * | 2014-01-09 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Preset packer and packing and fishing tool |
| CN104047580A (en) * | 2013-03-13 | 2014-09-17 | 中国石油天然气股份有限公司 | Movable underground throttler and using method thereof |
| CN204175262U (en) * | 2014-10-09 | 2015-02-25 | 中国石油天然气股份有限公司 | Underground throttle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20090323A (en) * | 2009-01-21 | 2010-01-25 | Evald Holstad | Plug for setting in a pipe |
-
2014
- 2014-10-09 CN CN201410528057.9A patent/CN105569621B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201661284U (en) * | 2010-04-29 | 2010-12-01 | 泸州川油钻采工具有限公司 | Compound sealing underground throttling device |
| CN104047580A (en) * | 2013-03-13 | 2014-09-17 | 中国石油天然气股份有限公司 | Movable underground throttler and using method thereof |
| CN103742102A (en) * | 2014-01-09 | 2014-04-23 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Preset packer and packing and fishing tool |
| CN204175262U (en) * | 2014-10-09 | 2015-02-25 | 中国石油天然气股份有限公司 | Underground throttle |
Non-Patent Citations (1)
| Title |
|---|
| 新型井下节流器研制及应用;喻成刚等;《钻采工艺》;20080731;第31卷(第4期);第91-93页 * |
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| Publication number | Publication date |
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| CN105569621A (en) | 2016-05-11 |
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