CN201705279U - Expansion type sealer - Google Patents
Expansion type sealer Download PDFInfo
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- CN201705279U CN201705279U CN 201020226043 CN201020226043U CN201705279U CN 201705279 U CN201705279 U CN 201705279U CN 201020226043 CN201020226043 CN 201020226043 CN 201020226043 U CN201020226043 U CN 201020226043U CN 201705279 U CN201705279 U CN 201705279U
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- pressure
- piston
- central tube
- communicated
- center pipe
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Abstract
The utility model discloses an expansion type sealer comprising a center pipe with an inner hole, wherein the outer side of the center pipe is fixedly sleeved with an expansion rubber cylinder in a sealing way, a pressure transfer passage for communicating an inner cavity of the expansion rubber cylinder and the inner hole of the center pipe is arranged on the wall of the pipe, a pressure relief cavity communicated with the outside of the sealer is arranged on the pipe wall of the center pipe, the pressure relief cavity and the inner hole of the center pipe are sealed by a piston which is inserted in the inner hole of the center pipe in a sliding way, the piston and the center pipe are fixed by a shearing nail, an outer blocking edge which is sealed and matched with the wall of the inner hole of the center pipe in a sliding way is arranged on the piston, and the two end faces of the outer blocking edge contact with the inner hole of the center pipe and the pressure relief cavity respectively in a pressure transfer way; and the lower end part of the piston is provided with a sealing part for sealing the pressure transfer passage and a communication part for communicating the pressure transfer passage and the inner hole of the center pipe after the pressure relief of the pressure relief cavity is carried out. In the utility model, the pressure transfer passage is sealed by adopting a blocking sleeve. When the oil pressure in the center pipe is greater than 8MPa, the piston shears off the shearing nail in a sliding way by the pressure relief of the pressure relief cavity, and the pressure transfer passage is opened, so that the rubber cylinder is expanded, and the controllable seated sealing is realized.
Description
Technical field
The utility model relates to a kind of inflatable 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 carry out measures such as acidification to dispel block, augmented injection to oil well.Chinese patent ZL00208834.7 discloses a kind of hydraulic expansion formula packer, comprise central tube with endoporus, end sealing at central tube connects the top connection with endoporus, side clearance is set with gluing socket joint head, packing element and lower rubber cylinder joint outside central tube, the upper and lower end parts of packing element is connected with gluing socket joint head and lower rubber cylinder joint sealing respectively, and described gluing socket joint head and lower rubber cylinder joint are connected with the sealing of central tube outer wall respectively; On the tube wall of central tube, offer the pressure transmission passage that connects packing element inner chamber and central tube inboard.The inflatable packer of said structure, because the pressure transmission passage is not sealed, in the process of going into the well at a high speed, in case in the packer during a little higher than casing pressure of the oil pressure of pipe (setting the about 0.8MPa of pressure), oil pressure arrives the packing element inner chamber through the pressure transmission passage and makes the expansion of packing element pressurized, in packer is gone into the well process, occur setting midway, cause the damage of packing element, directly influence the success rate of acidification to dispel block, augmented injection.
The utility model content
The purpose of this utility model provides a kind of controlled inflatable packer that sets, and sets when going into the well avoiding midway.
In order to realize above purpose, the technical scheme that the utility model adopted is: a kind of inflatable packer, comprise central tube with endoporus, this central tube outside sealing and fixing is set with the expansion packing element, offer the pressure transmission passage that is communicated with expansion packing element inner chamber and central tube endoporus on the tube wall, the tube wall of central tube is provided with and the extraneous pressure-releasing chamber that is communicated with of packer, this pressure-releasing chamber and central tube endoporus slide by one and are inserted into piston seal in the central tube endoporus, this piston and central tube are fixed by shear pin, have an outer retaining edge that cooperates with the slipper seal of central tube inner hole wall on the described piston, pressure transmission contacts the both ends of the surface on this outer retaining edge with pressure-releasing chamber with the central tube endoporus respectively; The bottom of described piston is provided with the hermetic unit of sealing pressure transmission passage, and the piston on sealing part top is provided with the connected component that is communicated with pressure transmission passage and central tube endoporus after the pressure-releasing chamber pressure release.
Described connected component is an inlet opening.
Described central tube is to be connected and composed by the top connection and the interior seal of tube, described outer retaining along with the inner hole wall sealed sliding of top connection movingly.
Described pressure-releasing chamber is to be surrounded jointly by top connection, interior pipe and piston to form, and offers the through hole that is communicated with the pressure-releasing chamber and the packer external world on the sidewall of top connection.
Described pressure-releasing chamber is to be surrounded jointly by interior pipe and piston to form, and offers the through hole that is communicated with the pressure-releasing chamber and the packer external world on the sidewall of interior pipe.
Described piston is to be made of driven plunger that is in transmission connection up and down and interstage sleeve, and this interstage sleeve is the hermetic unit of sealing pressure transmission passage, and described shear pin is located on the interstage sleeve; The inner hole wall of described top connection is provided with outer retaining edge and cooperates the interior edge that is used for the piston retaining.
Pipe is to be connected and composed by connector and bobbin seal in described, and the upper end and the top connection of connector are tightly connected; The lower surface of described connector offers axially extended strip groove, and the notch of this groove is communicated with expansion packing element inner chamber, offers the pressure transmission hole that is communicated with this groove and central tube endoporus on the bottom land sidewall.
Described expansion packing element is to be tightly connected successively by gluing socket joint head, packing element and lower rubber cylinder joint to constitute, the top and bottom of gluing socket joint head and lower rubber cylinder joint are connected with connector and sleeve outer wall sealing respectively, form the pressure transmission slit between described gluing socket joint head and the sleeve outer wall, this pressure transmission slit is communicated with described groove and packing element inner chamber.
The pressure transmission passage of inflatable packer of the present utility model is by piston seal, piston is by the fixing anti-sliding stop of shear pin, when the oil pressure in the central tube during greater than 8MPa, extraneous pressure reduction impels the pressure-releasing chamber pressure release to make the piston slip cut off shear pin in the packer, the pressure transmission passage transfers open mode to by sealing, the interior pressure of central tube this moment impels the packing element expansion, realizes setting.When the oil pressure in the central tube was lower than 8MPa, the slip that shear pin can limited piston had guaranteed packer in the process of going into the well at a high speed, and the problem that can occur midway setting has not realized that the controlled of inflatable packer sets.
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the enlarged drawing at A place among Fig. 1;
Fig. 3 is the structural representation of embodiment 2;
Fig. 4 is the structural representation of embodiment 3.
The specific embodiment
The inflatable packer of present embodiment as shown in Figure 1, 2, comprise the central tube with endoporus 23, this central tube is to be made of top connection 1 and interior pipe, and pipe is by connector in this, connector 6 is threaded on the outer wall of sleeve pipe 14 upper ends, and connection of thread is by the sealing of " O " shape sealing ring; The outer side clearance of sleeve pipe 14 is set with gluing socket joint head 10, packing element 11 and lower rubber cylinder joint 12, the upper and lower end parts of packing element 11 is connected with gluing socket joint head 10 and 12 sealings of lower rubber cylinder joint respectively, the upper end of gluing socket joint head 10 is connected with connector 6 bottom outer wall threads and seals by " O " shape sealing ring, the bottom of lower rubber cylinder joint 12 is connected with sleeve pipe 14 outer wall threads by connector 13, connection of thread is by the sealing of " O " shape sealing ring, and top connection 1 is threaded on connector 6 upper end outer walls; Be provided with pressure-releasing chamber 2 on the top of connector 6, this pressure-releasing chamber 2 is communicated with by the through hole 5 that is located on top connection 1 sidewall with the packer external world, pressure-releasing chamber 2 passes through a piston seal with central tube endoporus 23, this piston is to be made of driven plunger 3 that is in transmission connection up and down and interstage sleeve 7, described driven plunger 3 is slided and is inserted in the endoporus of connector 6 upper ends, and by 18 sealings of " O " shape sealing ring, the upper end has the outer retaining of annular along 17, should outer retaining along 17 side face with top connection 1 inwall is slidingly matched and seal by " O " shape sealing ring 16, driven plunger 3 and outer retaining thereof surround jointly with top connection and sleeve pipe 14 along 17 and form pressure-releasing chamber 2, on the inner hole wall of top connection 1, be provided with outside keep off cooperating and be used for the interior of driven plunger retaining along 25 along 17; Be provided with inlet opening 4 in the bottom of driven plunger 3, this inlet opening 4 is the connected component of piston, driven plunger 3 with top connection 6 fitting faces on offer the expansion slot 24 that is communicated with inlet opening 4; The lower surface of described connector 6 offers axially extended strip groove 9, these strip groove 9 notches are by the sleeve gap 15 and packing element intracavity inter-connection of gluing socket joint head 10 with sleeve pipe 14, offer the pressure transmission hole 8 that is communicated with this groove 9 and central tube endoporus 23 on the sidewall of strip groove 9 bottom lands, described sleeve gap 15, groove 9 and this pressure transmission hole 8 have constituted the pressure transmission passage; Described interstage sleeve 7 slides and is inserted in the endoporus of connector 6, the upper end of interstage sleeve 7 cooperates with the lower end transmission of driven plunger 3, the external surface that is slidingly matched with connector 6 at interstage sleeve 7 is provided with " O " shape sealing ring 19, annular groove 20 and " O " shape sealing ring 21 from top to bottom successively, " O " shape sealing ring 19,21 is used to seal pressure transmission hole 8, annular groove 20 cooperates spacing with shear pin 22 on being located at connector 6, described interstage sleeve 7 has formed the hermetic unit of piston.
The course of work of inflatable packer of the present utility model is: when the pressure in the packer endoporus increases, driven plunger 3 has the trend of downward motion, when pressure increases above 8MPa, powerful pressure impels pressure-releasing chamber 2 by through hole 5 pressure releases, driven plunger 3 moves downward promotion interstage sleeve 7 and cuts off shear pin 22, pressure transmission hole 8 is communicated with inlet opening 4, is in the packer pressure inside and enters the packing element inner chamber, the expansion of packing element pressurized is finished set by the pressure transmission passage.
The inflatable packer of present embodiment comprises the central tube with endoporus 23 as shown in Figure 3, and this central tube is to be made of interior pipe 30 and the top connection 1 that is threaded in interior pipe 30 upper ends, is provided with " O " shape sealing ring at connection of thread; Be set with gluing socket joint head 10, packing element 11 and lower rubber cylinder joint 12 in interior pipe 30 outsides, the upper and lower end parts of packing element 11 is connected with gluing socket joint head 10 and 12 sealings of lower rubber cylinder joint respectively, the interior respectively pipe 30 of gluing socket joint head 10 and lower rubber cylinder joint 12 is sealedly and fixedly connected, and is provided with the pressure transmission passage 33 that is communicated with central tube endoporus and packing element inner chamber on the interior pipe 30 of packing element 11 present positions; Be provided with pressure-releasing chamber 2 on the top of interior pipe 30, this pressure-releasing chamber 2 is communicated with by the through hole 5 that is located on top connection 1 sidewall with the packer external world, pressure-releasing chamber 2 seals by a piston 30 with central tube endoporus 23, also cooperate spacing with interior pipe in the endoporus of pipe 30 upper ends in these piston 31 slipper seals are inserted into by shear pin 22, the upper end of piston 31 has the outer retaining of annular along 17, should outer retaining along 17 side face with top connection 1 inwall is slidingly matched and seal by " O " shape sealing ring, described piston 30 and outer retaining thereof surround jointly with top connection 1 and interior pipe 30 along 17 and form pressure-releasing chamber 2, on the inner hole wall of top connection 1, be provided with outside keep off cooperating and be used for the interior of piston 31 retainings along 25 along 17; Be provided with connected component and sealing position respectively in the bottom of piston 31, connected component is the inlet opening 4 that is located on piston 31 sidewalls, bottom at inlet opening 4 is respectively equipped with " O " shape sealing ring 19 and " O " shape sealing ring 21, two " O " shape sealing rings 19,21 are divided into the both sides up and down of pressure transmission passage 33, have formed the hermetic unit of sealing pressure transmission passage.
The course of work of the inflatable packer of present embodiment is: when the pressure in the packer endoporus increases, piston 3 has the trend of downward motion, when pressure increases above 8MPa, powerful pressure impels pressure-releasing chamber 2 by through hole 5 pressure releases, piston 3 moves downward cuts off shear pin 22, pressure transmission passage 33 is communicated with inlet opening 4, is in the packer pressure inside and enters the packing element inner chamber, the expansion of packing element pressurized is finished set by pressure transmission passage 33.
The inflatable packer of present embodiment is with the difference of implementing 2: pipe 30 inboard and surrounded jointly by interior pipe 30 and piston 31 formed in described pressure-releasing chamber 2 was located at, offer the through hole 5 that is communicated with the pressure-releasing chamber 2 and the packer external world in described on the sidewall of pipe 30, the outer retaining of piston 31 upper ends cooperates with the inner tubal wall slipper seal of interior pipe 30 along 17, can realize purpose of the present invention equally.The course of work of the inflatable packer of present embodiment is identical with embodiment 2.
Claims (8)
1. inflatable packer, comprise central tube with endoporus, this central tube outside sealing and fixing is set with the expansion packing element, offer the pressure transmission passage that is communicated with expansion packing element inner chamber and central tube endoporus on the tube wall, it is characterized in that: the tube wall of central tube is provided with and the extraneous pressure-releasing chamber that is communicated with of packer, this pressure-releasing chamber and central tube endoporus slide by one and are inserted into piston seal in the central tube endoporus, this piston and central tube are fixed by shear pin, have an outer retaining edge that cooperates with the slipper seal of central tube inner hole wall on the described piston, pressure transmission contacts the both ends of the surface on this outer retaining edge with pressure-releasing chamber with the central tube endoporus respectively; The bottom of described piston is provided with the hermetic unit of sealing pressure transmission passage, and the piston on sealing part top is provided with the connected component that is communicated with pressure transmission passage and central tube endoporus after the pressure-releasing chamber pressure release.
2. inflatable packer according to claim 1 is characterized in that: described connected component is an inlet opening.
3. inflatable packer according to claim 1 is characterized in that: described central tube is to be connected and composed by the top connection and the interior seal of tube, described outer retaining along with the inner hole wall sealed sliding of top connection movingly.
4. inflatable packer according to claim 3 is characterized in that: described pressure-releasing chamber is to be surrounded jointly by top connection, interior pipe and piston to form, and offers the through hole that is communicated with the pressure-releasing chamber and the packer external world on the sidewall of top connection.
5. inflatable packer according to claim 3 is characterized in that: described pressure-releasing chamber is to be surrounded jointly by interior pipe and piston to form, and offers the through hole that is communicated with the pressure-releasing chamber and the packer external world on the sidewall of interior pipe.
6. according to each described inflatable packer of claim 2-5, it is characterized in that: described piston is to be made of driven plunger that is in transmission connection up and down and interstage sleeve, and this interstage sleeve is the hermetic unit of sealing pressure transmission passage, and described shear pin is located on the interstage sleeve; The inner hole wall of described top connection is provided with outer retaining edge and cooperates the interior edge that is used for the piston retaining.
7. according to each described inflatable packer of claim 2-5, it is characterized in that: pipe is to be connected and composed by connector and bobbin seal in described, and the upper end and the top connection of connector are tightly connected; The lower surface of described connector offers axially extended strip groove, and the notch of this groove is communicated with expansion packing element inner chamber, offers the pressure transmission hole that is communicated with this groove and central tube endoporus on the bottom land sidewall.
8. inflatable packer according to claim 7, it is characterized in that: described expansion packing element is to be tightly connected successively by gluing socket joint head, packing element and lower rubber cylinder joint to constitute, the top and bottom of gluing socket joint head and lower rubber cylinder joint are connected with connector and sleeve outer wall sealing respectively, form the pressure transmission slit between described gluing socket joint head and the sleeve outer wall, this pressure transmission slit is communicated with described groove and packing element inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020226043 CN201705279U (en) | 2010-06-13 | 2010-06-13 | Expansion type sealer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020226043 CN201705279U (en) | 2010-06-13 | 2010-06-13 | Expansion type sealer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201705279U true CN201705279U (en) | 2011-01-12 |
Family
ID=43442434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020226043 Expired - Fee Related CN201705279U (en) | 2010-06-13 | 2010-06-13 | Expansion type sealer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201705279U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291913A (en) * | 2013-05-22 | 2013-09-11 | 中国航天科技集团公司第六研究院第十一研究所 | Piston retaining device for gel fuel supercritical research experiments |
| CN110847846A (en) * | 2020-01-15 | 2020-02-28 | 山东博赛特石油技术有限公司 | Well washing protection integrated packer and method |
| CN111791457A (en) * | 2020-09-09 | 2020-10-20 | 东营鑫华莲石油机械有限公司 | External packer for casing |
-
2010
- 2010-06-13 CN CN 201020226043 patent/CN201705279U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291913A (en) * | 2013-05-22 | 2013-09-11 | 中国航天科技集团公司第六研究院第十一研究所 | Piston retaining device for gel fuel supercritical research experiments |
| CN110847846A (en) * | 2020-01-15 | 2020-02-28 | 山东博赛特石油技术有限公司 | Well washing protection integrated packer and method |
| CN111791457A (en) * | 2020-09-09 | 2020-10-20 | 东营鑫华莲石油机械有限公司 | External packer for casing |
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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: 20110112 Termination date: 20170613 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |