CN107558946B - A kind of packer - Google Patents
A kind of packer Download PDFInfo
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- CN107558946B CN107558946B CN201711021696.6A CN201711021696A CN107558946B CN 107558946 B CN107558946 B CN 107558946B CN 201711021696 A CN201711021696 A CN 201711021696A CN 107558946 B CN107558946 B CN 107558946B
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- deblocking
- central tube
- piston
- hole
- bushing pipe
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Abstract
The invention discloses a kind of packers, including central tube, top connection and lower contact, wherein, central duct is provided in central tube, top connection and lower contact are connect with the both ends of central tube respectively, oil pipe string is connected to top connection, packer further includes bushing pipe, slip assemblies, packing element component, set deblocking driving assembly and pitching deblocking device, bushing pipe is set in the outside of central tube, and bushing pipe can slide in default range along the axial line of central tube, slip assemblies, it packing element component and sets on the outer surface that deblocking driving assembly is sequentially arranged at bushing pipe along the direction of top connection to lower contact, pitching deblocking device is mounted on the lower end of the central duct of central tube.Disclosed by the invention packer deblocking when be provided simultaneously with above mention central tube tubing string deblocking and pitching suppress deblocking two kinds of deblocking modes, facilitate selection, improve the success rate of deblocking.It suppresses and sets and above propose deblocking movement and can be able to achieve with repetitive operation and multiple set and unsealing.
Description
Technical field
The present invention relates to oil-gas field developments to recover the oil, water filling, note oil displacement agent, gas production pit gear technical field, especially relates to
And a kind of packer.
Background technique
During oil-gas mining, need to block pit shaft and insulated.Packer, the glue of packer are used when closure
Cylinder, which is set in outside the tube-like piece of packer and transfers to underground, needs block-up position, by compressing axially the end face of packing element, makes packing element
Deformation, is radially expanded, and is sealed in pit shaft inner surface to realize sealing and compartmentation.
Packer after setting, which needs to unseal, removes closure, currently, packer is usually when encountering, deblocking fails, sealing element damages
Bad problem leads to have to terminate operation that packer is proposed well head, increases operating cost.
Therefore, how to improve the deblocking success rate of packer is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of packer, to improve the deblocking success rate of packer.
To achieve the goals above, the present invention provides following schemes:
A kind of packer, including central tube, top connection and lower contact, wherein central duct, institute are provided in the central tube
It states top connection and the lower contact is connect with the both ends of the central tube respectively, oil pipe string is connected to the top connection, the envelope
Further include bushing pipe, slip assemblies, packing element component, set deblocking driving assembly and pitching deblocking device every device, the bushing pipe is arranged
In the outside of the central tube, and the bushing pipe can slide in default range along the axial line of the central tube, institute
Slip assemblies, the packing element component and the deblocking driving assembly that sets are stated along the top connection to the direction of the lower contact
It is sequentially arranged on the outer surface of the bushing pipe, the pitching deblocking device is mounted under the central duct of the central tube
End；
The slip assemblies include cone, limit sleeve and slips, and the cone is connected on the upper surface of the bushing pipe, institute
It states slips to be set on the bushing pipe, and the first end of the slips is stuck on the outside of the conical surface of the cone, the of the slips
Two ends are abutted with the top of the packing element component, and the limit sleeve coats the slips, and the first end of the limit sleeve is stuck in
On the outer end of the cone face, the second end of the limit sleeve is stuck on the outer end face of the packing element component, is opened on the limit sleeve
There is first through hole, the slip insert part of the slips is stuck in the first through hole；
The deblocking driving assembly that sets includes setting piston, piston bush, setting valve body, spool, spring and sealing shroud, institute
It states and sets piston bush on the outer surface of the bushing pipe, the first end for setting piston and the bottom end of the packing element component are supported
Connect, the piston bush be set in it is described set on piston, the first end of the piston bush and first protrusion for setting piston
Portion abuts, and the valve body that sets is set on the central tube, and the bottom end for setting valve body and the bushing pipe is fixed, and described
The outer end face for setting valve body is provided with the second lug boss, and the top of second lug boss and the second end of the piston bush are fixed
Connection, the bottom end of second lug boss are fixedly connected with the first end of the sealing shroud, the second end of the sealing shroud and institute
The periphery sliding contact of lower contact is stated, described set is provided with installation through-hole on valve body, it is logical that the spool is mounted on the installation
In hole, the spool can slide in the installation through-hole, and the spring pocket is loaded on the outer surface of the spool, and can push away
Moving the spool makes the spool and the sealing surface of the installation through-hole fit, and it is logical that second is provided on the side wall of the central tube
Hole is provided with third through-hole on the bushing pipe, and second through-hole and the third through-hole can be connected, the third through-hole with it is upper
Cavity conducting, the upper cavity set valve body, the piston bush, the chamber for setting piston and the bushing pipe and surrounding to be described
The fourth hole opened up in body, lower chamber and the lower contact is connected, the lower chamber be the central tube, the sealing shroud,
The lower contact and the cavity for setting valve body composition；
Pitching deblocking device includes steel ball and the deblocking sliding sleeve that is set in the central tube, the deblocking sliding sleeve and
The bottom end of the central tube is connected by shear pin, and the deblocking sliding sleeve seals second through-hole, and the steel ball can be close
Seal the top end opening of the deblocking sliding sleeve.
It preferably, further include anti-flushing well piston and anti-flushing well cylinder sleeve in above-mentioned packer；
Anti-flushing well cylinder sleeve one end is connected to the outer surface of the top connection, the other end of the anti-flushing well cylinder sleeve and institute
It states cone abutting, the anti-flushing well cylinder sleeve and the top connection and the cone constitutes the hydraulic cylinder cavity of annular, the backwash
Well piston is installed in the anti-flushing well cylinder sleeve, and inner and outer round surface and the hydraulic cylinder cavity body are formed and sealed, the hydraulic cylinder
Cavity is located at the first cavity of anti-flushing well piston side and passes through the side opening that opens up in the top connection and the central tube
Central duct connection, the second cavity that the hydraulic cylinder cavity body is located at the anti-flushing well piston other side pass through the anti-flushing well cylinder
Put on the upper outer circle annular space that the fifth hole opened up is connected to the packer；
First passage is formed between the top connection and the cone, forms second between the cone and the central tube
Channel, the first passage are connected with the second channel, and third channel is formed between the bushing pipe and the central tube, described
Third channel is connected with the second channel, and described set is provided with fourth lane on piston, the fourth lane and the packing
The lower annulus sky of device is connected；
When anti-flushing well, the upper outer circle annular pressure is greater than the pressure of the central duct, on the anti-flushing well piston
It moves, second cavity is connected with the first passage, and the fourth lane is connected with the third channel；
At the end of anti-flushing well, the upper outer circle annular pressure is less than the pressure of the central duct, and the anti-flushing well is living
Plug moves down, and second cavity and the first passage are closed.
Preferably, in above-mentioned packer, the slip assemblies further include spring collar；
The spring collar is stuck in the outside of the slips, and can limit the axial movement of the slips.
Preferably, in above-mentioned packer, the slip assemblies further include the baffle ring being set on the bushing pipe；
Described baffle ring one end is connected through a screw thread with the limit sleeve, and the baffle ring other end is abutted with the slips.
Preferably, in above-mentioned packer, the packing element component includes multiple packing elements successively abutted.
Preferably, in above-mentioned packer, the packing element component further includes the spacer ring being arranged between the packing element.
Preferably, in above-mentioned packer, the top end opening of the deblocking sliding sleeve is tapered opening, and is connect along on described
The opening of head to tapered opening described in the direction of the lower contact is gradually reduced.
Preferably, in above-mentioned packer, the bottom end of the spool is equipped with split pin, and the split pin can be stuck in institute
State the entrance of installation through-hole.
Preferably, in above-mentioned packer, the central tube and the top connection and the lower contact are connected by screw thread
It connects.
Preferably, in above-mentioned packer, the number of the packing element is 3.
It can be seen from the above technical scheme that packer disclosed by the invention, when being set using it, to slips group
Part applied force is radially expanded so that deformation occurs for packing element component, is sealed in pit shaft inner surface to realize sealing and separate and make
With.It when needing to unseal, can be realized by two methods, the first deblocking mode: by central tube axially with respect to bushing pipe
It is mentioned in sliding, since lower contact and central tube are fixed together, and sealing shroud is fixed together by setting valve body with bushing pipe, because
This, lower contact opposing seal set moves up, and contacts after lower contact uplink a distance with spool, and continue uplink and push spool, will
The check valve of spool and installation duct composition is opened, and bushing pipe, piston bush and sets the hydraulic cylinder that valve body is connected to form at this time
The intracorporal liquid of epicoele releases, and sets piston retraction, so that the extruding force to packing element component is removed, before packing element component recovery squeezes
Shape.When central tube continues above to mention, lower contact upper surface continues uplink and sets valve with the lower end face contact of valve body, promotion is set
Body, bushing pipe, cone uplink together are fixed and are exited on the conical surface in the slips on bushing pipe inner wall from cone, is recovered in limit sleeve,
Deblocking process is proposed in completion；Second of deblocking mode: when needing to unseal, steel ball is put into from well head, steel ball is along oil pipe mesoporous
Downlink passes through central tube, eventually falls on deblocking sliding sleeve, the duct above and below herein is kept apart, then from well head into oil pipe
Hole is suppressed, and the pressure rise of sliding sleeve upper end is unsealed, and reaches setting pressure, and shear pin is cut, and deblocking sliding sleeve is pulled to lower section, in
It is provided with the second through-hole on heart duct and the side wall of central tube to be connected, further the third through-hole and upper cavity by being provided on bushing pipe
Conducting, fluid is along channel inflow central duct in upper cavity after central duct pressure reduction, then, in packing element elastic restoring force
Under effect, sets piston and retract hydraulic cylinder.Upper lifting pipe post, slips exit the cone conical surface again at this time, along radially contracted, realization solution
Envelope.Disclosed by the invention packer deblocking when be provided simultaneously with above mention central tube tubing string deblocking and pitching suppress deblocking two kinds solution
Envelope mode facilitates selection, improves the success rate of deblocking.Suppress set and above mention deblocking movement can be able to achieve with repetitive operation
Multiple setting and unsealing.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic cross-sectional view of packer provided by the invention.
Wherein, in Fig. 1:
Central tube 1, top connection 2, lower contact 3, fourth hole 301, central duct 101, oil pipe string 4, bushing pipe 5, slips group
Part 6, packing element component 7 set deblocking driving assembly 8, pitching deblocking device 9, cone 601, limit sleeve 602, slips 603, set
Piston 801, piston bush 802 set valve body 803, spool 804, sealing shroud 805, the first lug boss 8011, the second lug boss
8031, the second through-hole 102, third through-hole 501, upper cavity 10, lower chamber 11, steel ball 901, deblocking sliding sleeve 902, shear pin
903, anti-flushing well piston 12, anti-flushing well cylinder sleeve 13, the first cavity 14, side opening 15, the second cavity 16, fifth hole 17, first are logical
Road 18, third channel 20, fourth lane 21, spring collar 604, baffle ring 605, packing element 701, spacer ring 702, is opened second channel 19
Mouth pin 22.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art better understand technical solution of the present invention
Applying mode, the present invention is described in further detail.
Embodiment one
As shown in Figure 1, the invention discloses a kind of packer, including central tube 1, top connection 2, lower contact 3, bushing pipe 5, card
Watt component 6, packing element component 7 set deblocking driving assembly 8 and pitching deblocking device 9.It slip assemblies 6, packing element component 7 and sets
8 abutting end of driving assembly is unsealed to abut；Pitching deblocking device 9 is set in central duct 101, and pitching deblocking device 9 is outer
The inner surface gluing, sealing on surface and central tube 1, the lower end of central tube 1 is fixed on by shear pin 903.
Wherein, central duct 101 is provided in central tube 1, top connection 2 and lower contact 3 connect with the both ends of central tube 1 respectively
It connects, oil pipe string 4 is connected to top connection 2.
Bushing pipe 5 is set in the outside of central tube 1, and bushing pipe 5 can be along the axial line of central tube 1 in default range
Sliding.Here, preset range, which can according to need, is set.
Slip assemblies 6, packing element component 7 and set deblocking driving assembly 8 along top connection 2 to lower contact 3 direction successively
It is mounted on the outer surface of bushing pipe 5, pitching deblocking device 9 is mounted on the lower end of the central duct 101 of central tube 1.
Slip assemblies 6 include cone 601, limit sleeve 602 and slips 603, and cone 601 is connected on the upper surface of bushing pipe 5,
Slips 603 is set on bushing pipe 5, and the first end of slips 603 is stuck on the outside of the conical surface of cone 601, the second end of slips 603 with
The top of packing element component 7 abuts, and limit sleeve 602 coats slips 603, and the first end of limit sleeve 602 is stuck in 601 outer end face of cone
On, the second end of limit sleeve 602 is stuck on the outer end face of packing element component 7, first through hole is provided on limit sleeve 602, slips 603
Slip insert part is stuck in first through hole.Slips 603 is in limit sleeve 602, due to being limited by first through hole, slips 603
Can only relative limit set 602 move radially.It climbs in the axially driving lower slips 603 of limit sleeve 602 along the conical surface of cone 601
Open slips 603 towards outside.The number of first through hole can be evenly arranged on limit sleeve 602 to be multiple, in the present embodiment,
The number of first through hole is 4.
Set deblocking driving assembly 8 include set piston 801, piston bush 802, set valve body 803, spool 804, spring and
Sealing shroud 805 sets piston 801 and is sleeved on the outer surface of bushing pipe 5, sets the first end of piston 801 and the bottom of packing element component 7
End abuts, and packing element component 7 is expressed to when setting piston 801 and releasing, and annular space sealing is completed in the constantly compression of packing element component 7.It sets
Piston 801 is annular, is sleeved on the outer wall of bushing pipe 5, periphery is cased with piston bush 802.Piston bush 802, which is set in, sets work
On plug 801, the first end of piston bush 802 is abutted with the first lug boss 8011 for setting piston 801, is set valve body 803 and is set in
On central tube 1, sets valve body 803 and outer end face that the bottom end of bushing pipe 5 is fixed, and sets valve body 803 is provided with the second lug boss
8031, the top of the second lug boss 8031 is fixedly connected with the second end of piston bush 802, the bottom end of the second lug boss 8031 with it is close
The first end of big envelope 805 is fixedly connected, and the second end of sealing shroud 805 and the periphery sliding of lower contact 3 meet place, sets valve body
Installation through-hole is provided on 803, spool 804 is mounted in installation through-hole, and spool 804 can slide in installation through-hole, spring pocket
Outer surface loaded on spool 804, and can push spool 804 that spool 804 and the sealing surface of installation through-hole is made to fit, central tube
It is provided with the second through-hole 102 on 1 side wall, third through-hole 501 is provided on bushing pipe 5, the second through-hole 102 and third through-hole 501 can
Conducting, third through-hole 501 and upper cavity 10 are connected, and upper cavity 10 is to set valve body 803, piston bush 802, set 801 and of piston
The fourth hole 301 opened up in the cavity that bushing pipe 5 surrounds, lower chamber 11 and lower contact 3 is connected, fourth hole 301 and centre bore
Road 101 is connected.Pipe 1, sealing shroud 805, lower contact 3 and the cavity for setting the composition of valve body 803 centered on lower chamber 11.When center is logical
When road is suppressed and 11 pressure of lower chamber is made to be greater than 10 pressure of upper cavity, spool 804 is opened, and liquid enters in upper cavity 10, when outer
When portion's pressure is less than 10 pressure of upper cavity, under spring promotion, 804 counter motion of spool seals up installation through-hole, upper cavity 10
Interior liquid is sealed.The inner headed face of sealing shroud 805 and the periphery of lower contact 3 form the sealing that is slidably matched, and initial
The upper end of lower contact 3 has a certain distance with valve body 803 and spool 804 is set when state.Due to lower contact 3 and center
Pipe 1 is fixed together, and sealing shroud 805 is fixed together by setting valve body 803 with bushing pipe 5, so when central tube 1 is along axis
When above mentioning to the sliding of opposite bushing pipe 5,3 opposing seal of lower contact set 805 is moved up, after 3 uplink a distance of lower contact with spool 804
Contact, and continue uplink and push spool 804, check valve is opened, liquid releases in upper cavity 10 at this time, sets the contracting of piston 801
It returns, removes to 701 extruding force of packing element, packing element 701 restores shape before squeezing.When central tube 1 continues above to mention, 3 upper end of lower contact
Face continues uplink and sets valve body 803, bushing pipe 5, cone 601 uplink together with the lower end face contact of valve body 803, promotion is set, and blocks
Gu the slips 603 on internal surface of sleeve pipe is exited from the conical surface of cone 601, deblocking process is proposed in completion.
Pitching deblocking device 9 includes steel ball 901 and the deblocking sliding sleeve 902 that is set in central tube 1, deblocking sliding sleeve 902 with
The bottom end of central tube 1 is connected by shear pin 903, and deblocking sliding sleeve 902 seals the second through-hole 102, and steel ball 901 can seal solution
Seal the top end opening of sliding sleeve 902.The outer circle and 1 internal circular surfaces of central tube for unsealing sliding sleeve 902, which are formed, to be sealed, by central duct 101
It seals up.Deblocking sliding sleeve 902 is hollow structure, is equipped with inner conical surface in the mesoporous upper surface of deblocking sliding sleeve 902.Inner conical surface is equipped with
Steel ball 901,901 surface of steel ball and inner conical surface can form sealing.
Packer disclosed by the invention, when being set using it, to 6 applied force of slip assemblies, so that packing element component 7 is sent out
Raw deformation, is radially expanded, and is sealed in pit shaft inner surface to realize sealing and compartmentation.When needing to unseal, can pass through
Two methods realize that the first deblocking mode: axially the opposite sliding of bushing pipe 5 above mentions by central tube 1, due to lower contact 3 with
Central tube 1 is fixed together, and sealing shroud 805 is fixed together by setting valve body 803 with bushing pipe 5, therefore, 3 phase of lower contact
Sealing shroud 805 is moved up, is contacted after 3 uplink a distance of lower contact with spool 804, and continues uplink and pushes spool 804, by valve
The check valve of core 804 and installation duct composition is opened, and bushing pipe 5, piston bush 802 and sets what valve body 803 was connected to form at this time
Liquid in the upper cavity 10 of hydraulic cylinder releases, and the retraction of piston 801 is set, to remove the extruding force to packing element component 7, packing element
Component 7 restores shape before squeezing.When central tube 1 continues above to mention, 3 upper surface of lower contact continues uplink and sets valve body 803
Lower end face contact, promotion set valve body 803, bushing pipe 5, cone 601 uplink together, fix slips 603 on 5 inner wall of bushing pipe from
It exits, is recovered in limit sleeve 602 on the conical surface of cone 601, deblocking process is proposed in completion；Second of deblocking mode: work as needs
When deblocking, steel ball 901 is put into from well head, steel ball 901 passes through central tube 1, eventually fall in deblocking sliding sleeve along oil pipe mesoporous downlink
On 902, the duct above and below herein is kept apart, is then suppressed from well head to oil pipe mesoporous, unseals end pressure liter on sliding sleeve 902
Height reaches setting pressure, and shear pin 903 is cut, and deblocking sliding sleeve 902 is pulled to lower section, central duct 101 and central tube 1
Side wall on be provided with the conducting of the second through-hole 102, be further connected by the third through-hole 501 and upper cavity 10 that are provided on bushing pipe 5,
Fluid is along channel inflow central duct 101 in upper cavity 10 after 101 pressure reduction of central duct, then, in 701 elasticity of packing element
Under restoring force effect, sets piston 801 and retract hydraulic cylinder.Upper lifting pipe post, slips 603 exit 601 conical surface of cone again at this time, along
It is radially contracted, realize deblocking.Disclosed by the invention packer is provided simultaneously in deblocking above to be proposed the deblocking of 1 tubing string of central tube and throws
Ball suppresses two kinds of deblocking modes of deblocking, facilitates selection, improves the success rate of deblocking.Suppress set and above propose deblocking movement can be with
Repetitive operation is able to achieve and multiple setting and unsealing.
Embodiment two
In second embodiment provided by the invention, the knot of the packer in the present embodiment and the packer in embodiment one
Structure is similar, just repeats no more to something in common, only introduces difference.
In the present embodiment, specifically open packer further includes anti-flushing well piston 12 and anti-flushing well cylinder sleeve 13.
13 one end of anti-flushing well cylinder sleeve is connected to the outer surface of top connection 2, and the other end and the cone 601 of anti-flushing well cylinder sleeve 13 are supported
It connects, anti-flushing well cylinder sleeve 13 and top connection 2 and cone 601 constitute the hydraulic cylinder cavity of annular, and anti-flushing well piston 12 is installed on backwash
In well cylinder sleeve 13, inner and outer round surface and hydraulic cylinder cavity body are formed and are sealed, and hydraulic cylinder cavity body is located at 12 side of anti-flushing well piston
First cavity 14 is connected to by the side opening 15 opened up in top connection 2 with the central duct 101 of central tube 1, and hydraulic cylinder cavity body is located at
Second cavity 16 of 12 other side of anti-flushing well piston is connected to packer by the fifth hole 17 opened up on anti-flushing well cylinder sleeve 13
Upper outer circle annular space；
First passage 18 is formed between top connection 2 and cone 601, forms second channel between top connection 2 and central tube 1
19, first passage 18 and second channel 19 are connected, and form third channel 20 between bushing pipe 5 and central tube 1, third channel 20 and the
The conducting of two channels 19, sets and is provided with fourth lane 21 on piston 801, and fourth lane 21 is connected with the lower annulus sky of packer, when
For packer in when setting state, third channel 20 and fourth lane 21 are in the conductive state.
When anti-flushing well, upper outer circle annular pressure is greater than the pressure of central duct 101, and well-flushing piston moves up, the second cavity
It is connected with first passage 18, fourth lane 21 and third channel 20 are connected；At the end of anti-flushing well, upper outer circle annular pressure is less than
The pressure of central duct 101, well-flushing piston move down, and the second cavity and first passage 18 are closed.
Further, the invention discloses in packer, slip assemblies 6 further include spring collar 604, spring collar 604
Number be it is multiple；Spring collar 604 is stuck in the outside of slips 603, and can limit the axial movement of slips 603, Spring Card
Circle 604 can guarantee that solution is honored as a queen slips 603 automatically along diameter along radial deformation in the annular shape disconnected, such spring collar 604
To withdrawing in limit sleeve 602, it is equipped with protrusion at that end of the installation spring collar 604 of slips 603, spring collar can be prevented
604 slip from slips 603.
It further include the baffle ring 605 being set on bushing pipe 5 the invention also discloses slip assemblies 6；605 one end of baffle ring and limit
Set 602 is connected through a screw thread, and 605 other end of baffle ring is abutted with slips 603.
It further, include multiple packing elements 701 successively abutted, the present embodiment the invention particularly discloses packing element component 7
In, by taking the number of packing element 701 is 3 as an example.
It further, further include the spacer ring 702 being arranged between packing element 701 the invention discloses packing element component 7.
The end face of baffle ring 605 is contacted with 701 end face of packing element adjacent thereto, is played the limit to packing element 701 and is squeezed and makees
With.The top of baffle ring 605 and the limit sleeve 602 of slip assemblies 6 are fixed together, and enclosing limits space at slips 603.Baffle ring
605 and the contact surface of spacer ring 702 and packing element 701 control packing element 701 and equably deform regularly, and biggish change can be completed
Shape amount keeps enough sealing forces.Multiple-sealed face can be formed using multiple packing elements 701.When the extruding force of 701 end face of packing element is removed
After removing, packing element 701 pushes other each sections to reply initial position, therefore complete because of itself sprung back's original-shape
At the deblocking of packer.
In order to which better seal unseals sliding sleeve 902, the invention discloses the top end openings of deblocking sliding sleeve 902 to open for taper
Mouthful, and be gradually reduced along the opening of the direction tapered opening of top connection 2 to lower contact 3, steel ball 901 can be stuck in tapered opening
Place, sealing deblocking sliding sleeve 902.
For spool 804 completely into installation through-hole, the invention discloses the bottom ends of spool 804 to be equipped with opening in order to prevent
Pin 22, split pin 22 can be stuck in the entrance of installation through-hole.Installation is stuck in it should be noted that can also be can be realized with other
Through-hole entrance prevents spool 804 completely into cross bar of installation passage etc..
The invention discloses central tubes 1 and top connection 2 and lower contact 3 to be connected through a screw thread, convenient for top connection 2, under connect
First 3 with the dismounting of central tube 1.
Packer according to the present invention be provided simultaneously with mention central tube 1 deblocking and pitching suppress deblocking two kinds of deblocking modes,
Facilitate selection, improves the success rate of deblocking.Suppress set and above mention deblocking movement can be able to achieve multiple seat with repetitive operation
Envelope and deblocking.Also, technical solution provided by the present invention can also implementation tool set after anti-flushing well function, and company can be reached
The annular space up and down of logical setting position, influences lower part annular space backwash by packer setting.
" first " in the present invention, " second " etc. are to be distinguished in description, without others particular meanings.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and inventive features phase
Consistent widest scope.
Claims (10)
1. a kind of packer, including central tube (1), top connection (2) and lower contact (3), wherein be provided in the central tube (1)
Central duct (101), the top connection (2) and the lower contact (3) are connect with the both ends of the central tube (1) respectively, oil pipe
String (4) is connected to the top connection (2), which is characterized in that the packer further includes bushing pipe (5), slip assemblies (6), packing element
Component (7) sets deblocking driving assembly (8) and pitching deblocking device (9)；
The bushing pipe (5) is set in the outside of the central tube (1), and the bushing pipe (5) can be along the central tube (1)
Axial line slides in default range；
The slip assemblies (6), the packing element component (7) and described set unseal driving assembly (8) along the top connection (2)
It is sequentially arranged on the outer surface of the bushing pipe (5) to the direction of the lower contact (3)；
The slip assemblies (6) include cone (601), limit sleeve (602) and slips (603), and the cone (601) is connected in institute
On the upper surface for stating bushing pipe (5), the slips (603) is set on the bushing pipe (5), and the first end of the slips (603)
It being stuck on the outside of the conical surface of the cone (601), the second end of the slips (603) is abutted with the top of the packing element component (7),
The limit sleeve (602) coats the slips (603), and the first end of the limit sleeve (602) is stuck in the cone (601) outside
On end face, the second end of the limit sleeve (602) is stuck on the outer end face of the packing element component (7), on the limit sleeve (602)
It is provided with first through hole, slips (603) tooth part of the slips (603) is stuck in the first through hole；
It is described to set deblocking driving assembly (8) including setting piston (801), piston bush (802), setting valve body (803), spool
(804), spring and sealing shroud (805), the piston (801) that sets is sleeved on the outer surface of the bushing pipe (5), described to set
The first end of piston (801) is abutted with the bottom end of the packing element component (7), and the piston bush (802), which is set in, described sets work
It fills on (801), the first end of the piston bush (802) is abutted with first lug boss (8011) for setting piston (801), institute
It states and sets valve body (803) and be set on the central tube (1), the bottom end for setting valve body (803) and the bushing pipe (5) is solid
It is fixed, and the outer end face for setting valve body (803) is provided with the second lug boss (8031), the top of second lug boss (8031)
End is fixedly connected with the second end of the piston bush (802), the bottom end of second lug boss (8031) and the sealing shroud
(805) first end is fixedly connected, the second end of the sealing shroud (805) and the periphery sliding contact of the lower contact (3),
Described set is provided with installation through-hole on valve body (803), the spool (804) is mounted in the installation through-hole, the spool
(804) it can be slided in the installation through-hole, the spring pocket is loaded on the outer surface of the spool (804), and can push
The spool (804) makes the spool (804) and the sealing surface of the installation through-hole fit, the side wall of the central tube (1)
On be provided with the second through-hole (102), be provided with third through-hole (501) on the bushing pipe (5), second through-hole (102) and described
Three through-holes (501) can be connected, and the third through-hole (501) and upper cavity (10) are connected, and the upper cavity (10) is the seat
Seal valve body (803), the piston bush (802), the cavity for setting piston (801) and the bushing pipe (5) and surrounding, lower chamber
(11) it is connected with the fourth hole (301) opened up on the lower contact (3), the lower chamber (11) is the central tube (1), institute
State sealing shroud (805), the lower contact (3) and the cavity for setting valve body (803) composition；
Pitching deblocking device (9) includes steel ball (901) and the deblocking sliding sleeve (902) being set in the central tube (1), institute
It states deblocking sliding sleeve (902) and is connect with the bottom end of the central tube (1) by shear pin (903), the deblocking sliding sleeve (902) is close
Second through-hole (102) is sealed, the steel ball (901) can seal the top end opening of deblocking sliding sleeve (902).
2. packer according to claim 1, which is characterized in that further include anti-flushing well piston (12) and anti-flushing well cylinder sleeve
(13)；
Described anti-flushing well cylinder sleeve (13) one end is connected to the outer surface of the top connection (2), the anti-flushing well cylinder sleeve (13) it is another
One end is abutted with the cone (601), and the anti-flushing well cylinder sleeve (13) and the top connection (2) and the cone (601) are constituted
The hydraulic cylinder cavity of annular, the anti-flushing well piston (12) are installed in the anti-flushing well cylinder sleeve (13), inner and outer round surface with
The hydraulic cylinder cavity body forms sealing, and the hydraulic cylinder cavity body is located at the first cavity (14) of anti-flushing well piston (12) side
It is connected to by the side opening (15) opened up on the top connection (2) with the central duct (101) of the central tube (1), it is described hydraulic
Cylinder cavity is located at the second cavity (16) of anti-flushing well piston (12) other side by opening up on the anti-flushing well cylinder sleeve (13)
Fifth hole (17) be connected to the upper outer circle annular space of the packer；
First passage (18) are formed between the top connection (2) and the cone (601), the cone (601) and the center
It manages and forms second channel (19) between (1), the first passage (18) and the second channel (19) are connected, the bushing pipe (5)
Third channel (20) are formed between the central tube (1), the third channel (20) and the second channel (19) are connected, institute
It states to set and is provided with fourth lane (21) on piston (801), the fourth lane (21) and the lower outer circle annular space of the packer are led
It is logical；
When anti-flushing well, the upper outer circle annular pressure is greater than the pressure of the central duct (101), the anti-flushing well piston
(12) it moves up, second cavity (16) and the first passage (18) are connected, and the fourth lane (21) and the third are logical
Road (20) conducting；
At the end of anti-flushing well, the upper outer circle annular pressure is less than the pressure of the central duct (101), and the anti-flushing well is living
Plug (12) moves down, and second cavity (16) and the first passage (18) are closed.
3. packer according to claim 1, which is characterized in that the slip assemblies (6) further include spring collar
(604)；
The spring collar (604) is stuck in the outside of the slips (603), and can limit the axial of the slips (603) and move
It is dynamic.
4. packer according to claim 3, which is characterized in that the slip assemblies (6) further include being set in the lining
Manage the baffle ring (605) on (5)；
Described baffle ring (605) one end is connected through a screw thread with the limit sleeve (602), baffle ring (605) other end with it is described
Slips (603) abuts.
5. packer according to claim 1, which is characterized in that the packing element component (7) includes multiple successively abutting
Packing element (701).
6. packer according to claim 5, which is characterized in that the packing element component (7) further includes being arranged in the glue
Spacer ring (702) between cylinder (701).
7. packer according to claim 1, which is characterized in that the top end opening of deblocking sliding sleeve (902) is taper
Opening, and be gradually reduced along the opening of tapered opening described in direction of the top connection (2) to the lower contact (3).
8. packer according to claim 1, which is characterized in that the bottom end of the spool (804) is equipped with split pin
(22), the split pin (22) can be stuck in the entrance of the installation through-hole.
9. packer according to claim 1, which is characterized in that the central tube (1) and the top connection (2) and described
Lower contact (3) is connected through a screw thread.
10. packer described in any one of -9 according to claim 1, which is characterized in that the number of the packing element (701) is
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021696.6A CN107558946B (en) | 2017-10-27 | 2017-10-27 | A kind of packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021696.6A CN107558946B (en) | 2017-10-27 | 2017-10-27 | A kind of packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107558946A CN107558946A (en) | 2018-01-09 |
| CN107558946B true CN107558946B (en) | 2019-07-23 |
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ID=61031947
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711021696.6A Active CN107558946B (en) | 2017-10-27 | 2017-10-27 | A kind of packer |
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| Country | Link |
|---|---|
| CN (1) | CN107558946B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735614B (en) * | 2019-10-11 | 2024-05-28 | 中国石油天然气股份有限公司 | Fracturing plugging bridge plug and setting and unsetting method thereof |
| CN113294119B (en) * | 2020-02-21 | 2023-05-26 | 中国石油天然气股份有限公司 | Packer and well completion structure |
| CN111441739A (en) * | 2020-04-30 | 2020-07-24 | 大庆宏升石油机械设备制造有限公司 | Mechanical compression type tubular column switch type packer |
| CN111853239B (en) * | 2020-07-13 | 2021-08-20 | 大连理工大学 | Sealer device for floating transportation of pipe piles on sea |
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|---|---|
| CN107558946A (en) | 2018-01-09 |
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