CN203257371U - Supporting type packer - Google Patents
Supporting type packer Download PDFInfo
- Publication number
- CN203257371U CN203257371U CN 201320289990 CN201320289990U CN203257371U CN 203257371 U CN203257371 U CN 203257371U CN 201320289990 CN201320289990 CN 201320289990 CN 201320289990 U CN201320289990 U CN 201320289990U CN 203257371 U CN203257371 U CN 203257371U
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- CN
- China
- Prior art keywords
- lower contact
- central tube
- type packer
- support type
- spring
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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.)
- Expired - Fee Related
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Abstract
The utility model discloses a supporting type packer. The supporting type packer comprises a lower connector which extends in an axial direction along an up-down direction, and a central pipe, wherein the central pipe is detachably and fixedly assembled with the lower connector through a shear pin structure; a rubber barrel is sleeved outside the central pipe; the upper and lower ends of the rubber barrel are respectively ejected and matched with the central pipe and the lower connector and is used for compressing, sealing and expanding to descend a well; and the supporting type packer further comprises a spring which is arranged between the central pipe and the lower connector and is used for applying upward acting force on the central pipe after the shear pin structure is damaged and applying downward acting force on the lower connector so that the rubber barrel keeps an expanded state. The supporting type packer is descended to the well; when the lower connector is stopped and the shear pin structure is damaged, the spring applies the acting force to the central pipe and the lower connector so that the central pipe and the lower connector do not have relative movement; and therefore, the rubber barrel in the supporting type packer is prevented from being pressed and expanded to seal the packer in the midway, and the packer is normally sealed.
Description
Technical field
The utility model belongs to the oilfield exploitation technical field, is specifically related to a kind of support type packer.
Background technology
The oil field enters the high water-cut development later stage, for water controlled field, in order to improve oil well output, need to carry out fracturing yield increasing to oil well, and acidification to dispel block can also pass through water pack off to improve oil well output, reaches the purpose of steady oil control water.Packer is different according to its structure and operating principle, can be divided into support type packer, slip-type packer and hydraulic packer etc.The structure of disclosed packer is basic identical in the structure of at present common support type packer and the Chinese utility model patent manual that notification number is CN201078214Y, comprise the lower contact and the coaxial central tube that slidably is installed in the lower contact that axially extend along the vertical direction, central tube is by shear pin structure and the fixing assembling of lower contact, outside central tube, also be set with the packing element that sets with the realization of shutoff sleeve pipe for after by compression expanse, during work, in the support type packer lower going-into-well, when lower contact runs into top power, shear pin is cut off, central tube will continue descending and cause packing element compressed, and packing element expansion Sealed casing pipe sets with realization.When the needs deblocking, on carry central tube, discharge packing element, packing element is replied reset condition, realizes deblocking.
But mainly there are two problems in existing support type packer, on the one hand in heatproof, withstand voltage side is on the low side, can not satisfy the pressure break of deep layer extra-high voltage oil-gas reservoir; On the other hand, any packer all can be hampered in the process of going into the well and before reaching the setting position, when this common support type packer runs into middle resistance, the shear pin that is used for fixed center pipe and lower contact may be cut off, packing element will be compressed and set when continuing to go into the well, cause this time setting not in place, this time construct unsuccessfully, perhaps packing element compressed and the expansion after continue to move down, at this moment, owing to be close to pipe string internal wall after the packing element expansion, in folding process, cause easily packing element to damage, final impact sets effect, and is final so that this time set and construct unsuccessfully.
The utility model content
The purpose of this utility model is to provide a kind of support type packer, sets easily midway and causes setting the failed technical problem of construction to solve in the prior art in the process of going into the well the impaired rear support formula packer of cutting off of shear pin.
For achieving the above object, support type packer provided by the utility model adopts following technical scheme: a kind of support type packer, comprise the lower contact and the central tube that axially extend along the vertical direction, central tube is by shear pin structure and the removable fixedly assembling of lower contact, on outside central tube, being set with, lower end and central tube and the lower contact respectively compression of top interference fit set, strut the packing element of going into the well, described support type packer comprises that also being arranged at being used between described central tube and the lower contact applies upwards active force to central tube afterwards in that shear pin is destructurized, and lower contact is applied downward active force so that packing element keeps the spring of softened state.
Described spring is assemblied between the internal face of the external surface of central tube and lower contact and is positioned at shear pin structure below.
In the internal face of described lower contact and the external surface of central tube one of them is provided with along the vertical direction that the guiding of extending is ended spin slot, another is provided with ending the spin slot guiding with described guiding and only screwing the guiding of closing and only revolve projection of extending along the vertical direction.
The pipeline section place that overlaps with central tube of described lower contact is provided with the ventricumbent push stopping part of thrust, described guiding is only revolved on the external surface that projection is arranged on central tube, and described guiding only revolves that projection has for cooperating with the unidirectional thrust of the thrust surface of described push stopping part so that the spring pre-tightening top press-fits the thrust surface that fits between central tube and the lower contact.
Described guiding is only revolved projection and is also had down the top pressure surface with spring upper end top interference fit of being used for.
Offer the balance pipe that is communicated with spring space of living in and lower contact space outerpace of living on the tube wall of described lower contact.
The end of described packing element is furnished with Coaxial Superimposed inside and outside bowl-shape protection ring together; the end that is provided with inside and outside bowl-shape protection ring of described packing element is the taper surface with the circumferential inner ring surface top interference fit of described inside and outside bowl-shape protection ring, and the bottom of described inside and outside bowl-shape protection ring all offers the perforation of passing for central tube.
The ring of described interior bowl-shape protection ring along the distance of the end face of terminal and packing element corresponding end greater than the ring of the described outer bowl-shape protection ring distance along the end face of terminal and packing element corresponding end.
Described lower contact comprise the lower contact body and with the support set of lower contact body spiral inserting, be provided with the external screw thread that is connected for thread of supporting sleeves on the top of lower contact body, on the lower contact body, convex with the thrust shaft shoulder that cooperates for the unidirectional thrust in support set lower surface in described externally threaded lower end.
The upper surface of described lower contact body is for being used for the top pressure surface with the spring top interference fit.
The beneficial effects of the utility model are: support type packer provided by the utility model in use, support type packer is gone into the well, when lower contact is obstructed and so that shear pin structure when being destroyed, because spring does not apply so that do not produce between central tube and the lower contact to central tube and lower contact and relatively moves, and then avoid the packing element in the support type packer to be subjected to compression swelling and to cause packer to set midway, guarantee that packer normally sets.Spring in the support type packer provided by the utility model can work after the shear pin structure is by accidental destruction, so avoid dispenser midway accident set.
Description of drawings
Fig. 1 is the structural representation of a kind of support type packer provided by the utility model.
The specific embodiment
As shown in Figure 1, a kind of embodiment of support type packer, support type packer among this embodiment comprises lower contact 20 and the coaxial central tube 16 that slidably is installed in the lower contact that axially extends along the vertical direction, between central tube 16 and lower contact 20, be provided with middle part sealing ring 7, central tube 16 comprise central tube body 6 with the top connection 1 that tubing string is connected that is used for of central tube body spiral inserting, between top connection 1 and central tube body 6, be provided with sealing ring 2, lower contact 20 then comprise lower contact body 14 and with the support set 13 of lower contact body spiral inserting, be provided with the external screw thread that is connected for thread of supporting sleeves on the top of lower contact body 14, on the lower contact body, convex with the thrust shaft shoulder that cooperates for the unidirectional thrust in support set lower surface in described externally threaded lower end, central tube body 6 is by the support set 13 fixing assemblings in shear pin structure 8 and the lower contact 20, is set with packing element 5 between top connection and lower contact at the central tube body.Difference from prior art mainly is, has in shear pin structure arranged beneath between the internal face of the external surface of central tube body 6 and the support set in the lower contact 13 and axially extends along the vertical direction and two ends are pushed up respectively and are pressed in central tube and the lower contact spring 10 that forces the active force that lower contact moves down to apply to lower contact.In the present embodiment, central tube and lower contact are led along the vertical direction only to revolve and are slidingly matched, be concaved with the guiding of extending along the vertical direction at the internal face of lower contact and end spin slot 11, and be provided with ending the spin slot guiding with described guiding and only screwing the guiding of closing and only revolve projection 15 of extending along the vertical direction at the external surface of central tube.And the pipeline section place that overlaps with central tube in lower contact is provided with the ventricumbent push stopping part of thrust, be arranged on guiding on the external surface of central tube and only revolve that projection has for cooperating with the unidirectional thrust of the thrust surface of described push stopping part so that the spring pre-tightening top press-fits the thrust surface that fits between central tube and the lower contact, guiding is only revolved projection 15 and is had down the top pressure surface with the top interference fit of spring 10 upper end of being used for, in the upper surface of lower contact body 14 for being used for the top pressure surface with top, the lower end interference fit of spring 10.
In the present embodiment, the central tube body extends down in the lower contact body, and is furnished with lower seal 12 in the overlapping position of central tube body and lower contact body.
In the present embodiment, tube wall at the support set 13 of lower contact offers the balance pipe 9 that is communicated with spring space of living in and lower contact space outerpace of living in, like this, behind the spring pressurized, can guarantee that spring inner space of living in is connected with the inside and outside pressure of balance lower contact with lower contact space outerpace of living in.
In the present embodiment; for improving high temperature resistant, the high-voltage resistance capability of support type packer; end at the packing element of coaxial package outside central tube of support type packer is furnished with Coaxial Superimposed interior bowl-shape protection ring 4 and outer bowl-shape protection ring 3 together; the end that is provided with inside and outside bowl-shape protection ring of described packing element is the taper surface with the circumferential inner ring surface top interference fit of described inside and outside bowl-shape protection ring, and the bottom of described inside and outside bowl-shape protection ring all offers the perforation of passing for central tube.And the ring of described interior bowl-shape protection ring 4 along the distance of the end face of terminal and packing element corresponding end greater than the ring of described outer bowl-shape protection ring 3 distance along the end face of terminal and packing element corresponding end.Above-mentioned inside and outside bowl-shape protection ring is the red copper ring; adopt double-deck stacked configuration herein; when packer setting; inside and outside bowl-shape protection ring is strutted; be packed between packer and the sleeve pipe; guarantee that packer presses and hold that packing element can not move up or down when pressing down holding, well protect packing element, finally improve packer heat resisting and pressure resisting performance.
In the present embodiment, guiding only revolves that projection has for cooperating with the unidirectional thrust of the thrust surface of described push stopping part so that the spring pre-tightening top press-fits the thrust surface that fits between central tube and the lower contact, guiding only revolves projection and the thrust of push stopping part anticreep cooperates, like this, can overcome so that the active force of spring acts on the anticreep thrust structure on the one hand, can not act on the shear pin structure, on the other hand, by the anticreep thrust structure so that spring be pre-assembled between central tube and the lower contact, in case like this shear pin structural break, spring can work.
In the above-described embodiments, spring fitting is below the shear pin structure, and in other embodiments, spring also can be arranged in the below of shear pin structure.
In the above-described embodiments, spring is arranged between the internal face of the external surface of central tube and lower contact, and in other embodiments, spring also can be located at other positions, between the lower end and lower contact such as central tube.
Support type packer in the present embodiment in use, support type packer is gone into the well, when lower contact is obstructed and so that shear pin structure when being destroyed, central tube moves down, the both ends of the spring top is pressed in central tube and the lower contact to apply the active force that forces lower contact to move down to lower contact, do not relatively move with regard to not having between central tube and the lower contact like this, and then avoid the packing element in the support type packer to be subjected to compression swelling and to cause packer to set midway.When above-mentioned support type packer moves down into the setting position, if this moment, the shear pin structure not yet ruptured, lower contact is pushed up on the lower support point that is pressed in the tubing string, and the certain load of pressurizeing is downwards at first cut off shear pin, then Compress Spring is finally oppressed packing element so that packing element expanse and realize setting purpose.And if the shear pin structure has ruptured, lower contact top is pressed on the lower support point in the tubing string, pressurizes to overcome acting force of the spring downwards, finally oppresses packing element so that packing element expanse and not affecting normally sets.
Claims (10)
1. support type packer, comprise the lower contact and the central tube that axially extend along the vertical direction, central tube is by shear pin structure and the removable fixedly assembling of lower contact, outside central tube, be set with upper and lower end and central tube and lower contact respectively the compression of top interference fit set, strut the packing element of going into the well, it is characterized in that: described support type packer comprises that also being arranged at being used between described central tube and the lower contact applies upwards active force and lower contact is applied downward active force so that packing element keeps the spring of softened state central tube afterwards in that shear pin is destructurized.
2. support type packer according to claim 1 is characterized in that: described spring is assemblied between the internal face of the external surface of central tube and lower contact and is positioned at shear pin structure below.
3. support type packer according to claim 2 is characterized in that: one of them in the internal face of described lower contact and the external surface of central tube is provided with that the guiding of extending is along the vertical direction ended spin slot, another is provided with ending the spin slot guiding with described guiding and only screwing the guiding of closing and only revolve projection of extending along the vertical direction.
4. support type packer according to claim 3, it is characterized in that: the pipeline section place that overlaps with central tube of described lower contact is provided with the ventricumbent push stopping part of thrust, described guiding is only revolved on the external surface that projection is arranged on central tube, and described guiding only revolves that projection has for cooperating with the unidirectional thrust of the thrust surface of described push stopping part so that the spring pre-tightening top press-fits the thrust surface that fits between central tube and the lower contact.
5. support type packer according to claim 3 is characterized in that: described guiding is only revolved projection and is also had down the top pressure surface with spring upper end top interference fit of being used for.
6. the described support type packer of any one in 5 according to claim 2 is characterized in that: offer the balance pipe that is communicated with spring space of living in and lower contact space outerpace of living on the tube wall of described lower contact.
7. each described support type packer in 5 according to claim 1; it is characterized in that: the end of described packing element is furnished with Coaxial Superimposed inside and outside bowl-shape protection ring together; the end that is provided with inside and outside bowl-shape protection ring of described packing element is the taper surface with the circumferential inner ring surface top interference fit of described inside and outside bowl-shape protection ring, and the bottom of described inside and outside bowl-shape protection ring all offers the perforation of passing for central tube.
8. support type packer according to claim 7 is characterized in that: the ring of described interior bowl-shape protection ring along the distance of the end face of terminal and packing element corresponding end greater than the ring of the described outer bowl-shape protection ring distance along the end face of terminal and packing element corresponding end.
9. according to claim 3 or 4 or 5 described support type packers, it is characterized in that: described lower contact comprise the lower contact body and with the support set of lower contact body spiral inserting, be provided with the external screw thread that is connected for thread of supporting sleeves on the top of lower contact body, on the lower contact body, convex with the thrust shaft shoulder that cooperates for the unidirectional thrust in support set lower surface in described externally threaded lower end.
10. support type packer according to claim 9 is characterized in that: the upper surface of described lower contact body is for being used for the top pressure surface with the spring top interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320289990 CN203257371U (en) | 2013-05-24 | 2013-05-24 | Supporting type packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320289990 CN203257371U (en) | 2013-05-24 | 2013-05-24 | Supporting type packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203257371U true CN203257371U (en) | 2013-10-30 |
Family
ID=49469948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320289990 Expired - Fee Related CN203257371U (en) | 2013-05-24 | 2013-05-24 | Supporting type packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203257371U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314518A (en) * | 2014-10-28 | 2015-01-28 | 中国石油集团西部钻探工程有限公司 | Opening-closing tool |
| CN108086938A (en) * | 2016-11-21 | 2018-05-29 | 中国石油化工股份有限公司 | A kind of packer |
-
2013
- 2013-05-24 CN CN 201320289990 patent/CN203257371U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314518A (en) * | 2014-10-28 | 2015-01-28 | 中国石油集团西部钻探工程有限公司 | Opening-closing tool |
| CN108086938A (en) * | 2016-11-21 | 2018-05-29 | 中国石油化工股份有限公司 | A kind of packer |
| CN108086938B (en) * | 2016-11-21 | 2020-03-31 | 中国石油化工股份有限公司 | Packer |
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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: 20131030 Termination date: 20160524 |