CN207131367U - A kind of casing annulus packer - Google Patents
A kind of casing annulus packer Download PDFInfo
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- CN207131367U CN207131367U CN201720817671.6U CN201720817671U CN207131367U CN 207131367 U CN207131367 U CN 207131367U CN 201720817671 U CN201720817671 U CN 201720817671U CN 207131367 U CN207131367 U CN 207131367U
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- packing element
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- sliding sleeve
- retainer ring
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Abstract
A kind of casing annulus packer, including top connection and central tube are the utility model is related to, the upper end of top connection is provided with the box thread mutually to be spun with upper square casing, and the upper end of central tube is screwed in the box thread of top connection lower end；Packing element is set with the middle part of central tube, the position in the wellbore of packing element is corresponding to the position of well sealing layer；The upper end of packing element is embedded in packing element bearing, packing element bearing is sleeved on central tube, elastic supporting mechanism is provided between the top of packing element bearing and the lower surface of top connection, the periphery at packing element axial direction middle part is provided with twice packing element neck, and respectively embedded with setting hoop, spaced apart between two setting hoops, the lower surface of packing element is provided with hydraulic compression mechanism.Elastic supporting mechanism includes being sleeved on the retainer ring and spring steel support ring of central tube periphery, and the bottom of spring steel support ring is evenly distributed with multiple flexible flaps, and the lower end of each flexible flaps is flared out respectively.The packer can reliable sealed thin interlayer, prevent oil gas water breakthrough completely.
Description
Technical field
A kind of packing device of oil drilling is the utility model is related to, more particularly to a kind of casing annulus packer, is belonged to
Petroleum drilling technology field.
Background technology
With deepening continuously for In Oil Field Exploration And Development, the oil sheet old area adjustment well that oil gas is active, strata pressure is complicated is got over
Come it is more, to the performance requirement of oil field drilling completion downhole tool also more and more higher.Especially into high water cut viscous heavy crude oil, due to
Note adopts unbalanced influence, the multi pressure series of strata on longitudinal direction and deposit, the increase of seepage flow flow, interlayer contradiction protrude, oil reservoir is more and thin,
Sealing segment length, cement mortar are difficult to meet each stressor layer demand, and oil gas water breakthrough easily occurs.In terms of cementing quality requirement, to prevent
Alter mutually logical between the oil sheet being only adjusted, sealing quality requirement is very high.The cementing quality of oil sheet is difficult in actual job
Ensure, seriously constrain effective implementation of development plan, how to resolve oil sheet adjustment well water breakthrough problem turn into work as
Before the technical barrier that must pull against.
One of main downhole tool as petroleum exploration and development, packer be widely used in completion well cementing operation and
In all kinds of packing bridge blinding operations, the packer used in the market is mainly external casing packer, and external casing packer is one
Kind permanent type external packer of pipe, expansion packing element is used the downhole packing and bridge blinding of various purposes to be realized, to improving for potted component
There is remarkable effect with oily, gas and water well well cementation total completion time is improved.Packer is broadly divided into mechanical setting, setting two class of fluid power.
The quality of packer sealing quality is critically depend on the size of contact stress between the borehole wall and rubber tube, conventional packing
Stereotyped structure without packing element dilatancy in the structure of device, also no supporting mechanism supports after packing element expansion.Entering
During row packing, the deformation after being expanded due to packing element is irregular, has spikes/low- points on same cross section, dilation occurs
Distortion is overlapping, causes seal line to be moved about, it is impossible to realizes the sealing effectiveness similar to abacus pearl.In order to realize effective packing,
Generally require to make up by lengthening the length of packing element, make to form larger contact area between packing element and the borehole wall, to realize
Face contact sealing, this kind of seal form need enough packing element length to ensure sealing effectiveness.Therefore the packing element of conventional packer
Length reaches 1.2~1.5m, causes the length of whole packer to be generally more than 3m.
Oil gas well capacity depends primarily on Inter-zonal packing degree, and Inter-zonal packing degree is decided by the close of interface of cementing the well
Envelope degree.Sealing layer is generally referred to as thin interlayer in 3m, and for the exceptional well of thin interlayer, conventional packer can not use, nothing
Method realizes the packing requirement that oil mining proposes, longer conventional packer can not be placed in thin interlayer；Can if placing by force
Oil-gas Layer is insulated, influences the production such as later stage perforation, oil recovery；Or cause to alter groove rate very high.In addition, packer length is long, fortune
Defeated inconvenience, and in the big angle buildup interval of dog-leg, be not easy tripping in, limit use to a certain extent.
Utility model content
The purpose of this utility model is, overcomes problems of the prior art, there is provided a kind of casing annulus packer,
Below 3m thin interlayer can be reliably sealed, prevents oil gas water breakthrough completely.
To solve above technical problem, a kind of casing annulus packer of the present utility model, including top connection and central tube,
The upper end of the top connection is provided with the box thread mutually to be spun with upper square casing, and the upper end of the central tube is screwed in top connection lower end
Box thread in；It is set with packing element in the middle part of the central tube, the position in the wellbore of the packing element and well sealing layer
Position is corresponding；The upper end of the packing element is embedded in packing element bearing, and the packing element bearing is sleeved on the central tube, the glue
Elastic supporting mechanism is provided between the cylinder top of bearing and the lower surface of the top connection, the periphery at packing element axial direction middle part is set
There is twice packing element neck, bound round respectively embedded with setting in the packing element neck, it is spaced apart between twice setting hoop, it is described
The lower surface of packing element is provided with hydraulic compression mechanism.
Relative to prior art, the utility model achieves following beneficial effect：Packing element is upward by hydraulic compression mechanism
Extruding, integrally move up and outwards expand, the upper end of packing element is stuck in promotion packing element bearing upward sliding in packing element bearing,
The reaction force of the elastically supported mechanism of packing element bearing so that packing element both ends are by stable extruding force；Due in the middle part of packing element
Shape and bind round provided with twice, be allowed to outwards to expand by blocking in the middle part of packing element, it is then each above and below twice setting hoop
Form the expansion loop for being similar to abacus pearl together；Twice expansion loop forms the low regular shape in middle high both sides respectively, due to
The both sides up and down of each expansion loop are reliably limited and supported, therefore twice expansion loop is not in distortion, and seal line will not be swum
It is dynamic, twice " O " type sealing ring can be played a part of, form dual-seal, effectively increase the sealing effectiveness of packer；Make envelope
Every device without being declined by lengthening packing element length to make up sealing effectiveness caused by seal line is moved about.The utility model is in packing element
After portion sets setting hoop and sets elastic supporting mechanism above packing element bearing so that packing element length of the present utility model is only
It is routine every 1/3~1/5 or so of device packing element length, and then packer entire length can be made to shorten to below 1.2m, completely
Thickness can be competent at for the setting of the thin interlayers of below 3m, prevent fluid from mutually altering, it is ensured that the cementing quality of thin interlayer well, to improve oil well
Life-span and yield.It is readily transported using the casing annulus packer and is easy to tripping in the big well section of dog-leg, reduces packer pair
The requirement of dog-leg severity, widens use range；
As improvement of the present utility model, the elastic supporting mechanism includes being sleeved on the retainer ring of the central tube periphery
With spring steel support ring, the upper end of the retainer ring is resisted against the lower end of the top connection, and the lower end of the retainer ring is provided with admittedly
Determine ring horn mouth, the bell-mouthed root of retainer ring communicates with the retainer ring annular recess being recessed upwards, the spring steel branch
The upper end of pushing out ring is inlaid in the retainer ring annular recess, and the bottom of the spring steel support ring is evenly distributed with multiple tracks lower end
The groove of opening makes the bottom of spring steel support ring form multiple flexible flaps, and the lower end of each flexible flaps is outwards opened respectively
Open.The lower end that retainer ring is resisted against top connection provides support for spring steel support ring, when packing element be squeezed withstand packing element bearing to
When upper mobile, each flexible flaps are further opened in umbrella, and retainer ring annular recess securely fixes the whole of spring steel support ring
Circumferential section, retainer ring horn mouth provides space and spacing for the opening of each flexible flaps in spring steel support ring lower end, when each
When being fitted on the outside of flexible flaps on retainer ring horn mouth, opening maximum is reached, is provided to packing element bearing and packing element uniform
Reaction force；Simultaneously when packing element is expanded into abacus pearl, each flexible flaps uniformly opened play a part of supporting bracket, right
The expansion loop of packing element forms support and support, expansion loop is kept the abacus pearl of rule, realizes and realize line on same section
Sealing, and ensure that sealing effectiveness is reliable.
As further improvement of the utility model, the upper end of the packing element bearing is provided with up-small and down-big packing element bearing and bored
Shape inclined-plane, the lower end of each flexible flaps are born against on the circumference of the packing element bearing tapered slope, each packing element bearing
The inclination angle of tapered slope and the bell-mouthed inclination angle of the retainer ring are equal；The root periphery of each flexible flaps is respectively equipped with bullet
Property limb arc groove, each flexible flaps arc groove be located on same circumference and positioned at the retainer ring it is bell-mouthed
Root.The lower end of flexible flaps is born against on the circumference of packing element bearing tapered slope so that packing element, which is squeezed, withstands packing element
When bearing moves up, each flexible flaps are further opened along packing element bearing tapered slope in umbrella, and flexible flaps are to packing element
Bearing tapered slope applies reaction force, when flexible flaps, which are flared to inner side, to be bonded completely with packing element bearing tapered slope, respectively
The outside of flexible flaps is just fitted on retainer ring horn mouth, i.e., each flexible flaps have been flared to maximum, the expansion to packing element
Circle forms support and support；Flexible flaps arc groove causes the crooked position of each flexible flaps to be consistent, and makes each elastic valve
The supporting bracket circularity that piece is formed after opening is very high, and increase can ensure that the regular shape of packing element expansion loop is stable.
As further improvement of the utility model, the bottom of the spring steel support ring is provided with rubber protecting jacket, described
Rubber protecting jacket is covered in the periphery of each flexible flaps, and the periphery of the rubber protecting jacket and the periphery of the retainer ring are put down
Together, the upper end of the rubber protecting jacket is embedded in the retainer ring horn mouth and the flexible flaps arc groove；The rubber
The position that protective case contacts with the retainer ring lower edge is provided with rubber protecting jacket annular recess.The periphery of rubber protecting jacket and fixation
The periphery of ring is concordantly advantageous to whole casing annulus packer and smoothly glided with sleeve pipe；Rubber protecting jacket covers each flexible flaps
It can play a protective role, be prevented during going into the well inside, the foreign matter that the lower end of flexible flaps is touched on the borehole wall causes to stick up
Rise impaired；In the upper end insertion flexible flaps arc groove of rubber protecting jacket, the most weak position of flexible flaps is carried out
Reinforcement, and the opening of flexible flaps is not influenceed；Rubber protecting jacket annular recess is easy to rubber protecting jacket to bend deformation here, prevents
Larger obstruction power is formed after only rubber protecting jacket is extruded.
As further improvement of the utility model, the hydraulic compression mechanism includes embracing the cunning in the central tube periphery
Set, the top braces of the sliding sleeve internal perisporium of step in the lower section of the packing element lower surface, the sliding sleeve upper end pass through O-shaped
Circle realizes and sealed that the upper end of the sliding sleeve is provided with sliding sleeve outer step, glue is connected with the sliding sleeve outer step with the central tube
Cylinder pressure cap, the lower end periphery of the packing element are plugged in the rubber cylinder pressing cap；The inner chamber of the sliding sleeve is provided with center spud, described
The periphery wall that the upper end of center spud is screwed on the male thread of central tube lower end and center spud upper end outer step passes through O-ring
Realize and seal with the inwall of the sliding sleeve, the lower end of the center spud is stretched out from the lower end of the sliding sleeve；The sliding sleeve upper end
Space between the lower section of interior step and the top of center spud upper end outer step forms the hydraulic cavities of the sliding sleeve；It is described
The lower port inner chamber of sliding sleeve is provided with ring cavity, and elastic lock sleeve is provided with the ring cavity, and the elastic lock sleeve is embraced in institute
The periphery of center spud is stated, and the inwall of the elastic lock sleeve is provided with box thread, the lower end periphery of the sliding sleeve is connected with lock tube
Nut, the interior step of the lock tube nut are resisted against the lower section of the elastic lock sleeve；The stage casing of the center spud short transverse
Periphery is provided with the stopping lock tooth that can be engaged with the box thread of elastic lock sleeve.Rubber cylinder pressing cap limits the lower end of packing element, prevents
The lower end of its packing element outwards expands protrusion；When slide over hydraulic cavities fluid power act under head on packing element it is up when, lock tube nut
It is up with sliding sleeve, outer wall upward sliding of the elastic lock sleeve along center spud is push, elastic lock sleeve, which is provided with axial groove, makes elasticity
Lock tube has certain deformability, will can only by monodirectional locking, sliding sleeve when elastic lock sleeve, which is gone upward to, to be engaged with stopping lock tooth
Upward packing element, even if fluid power disappears, sliding sleeve will not also glide release.
As further improvement of the utility model, the bottom of central tube position corresponding with the hydraulic cavities is along footpath
At least two blind pluggings are plugged with to symmetrical, the circumference of the blind plugging, which is provided with, is easy to the blind plugging V-shaped groove that blind plugging neatly fractures, described
The bottom land of blind plugging V-shaped groove is concordant with the inwall of the central tube, and the blind plugging is provided with what ecto-entad extended along blind plugging center line
Half deep hole, the axis of the cecum of half deep hole than the blind plugging V-shaped groove closer to the central tube；The external end head of the blind plugging
Pushed down respectively by blind plugging gland, the blind plugging gland is screwed in the blind plugging gland screwed hole of the center spud respectively, described
Blind plugging gland, which is distributed with, multiple to be communicated with half deep hole of the blind plugging.After blind plugging is inserted into the tube wall of central tube, screw on blind
Stifled gland compresses blind plugging, and before blind plugging is broken off, hydraulic cavities and center tube cavity are obstructed, and now casing annulus packer is in lock
Determine state, preventing from surprisingly working during going into the well causes mistake to expand.After plug is dropped down onto in blind plugging, drilling fluid pump is pressurized to
Packer working pressure, plug fracture blind plugging at the bottom land of blind plugging V-shaped groove, and the drilling fluid of center tube cavity passes through blind plugging
Half deep hole and gland through hole at center enter the hydraulic cavities of sliding sleeve, and the fluid power promotion sliding sleeve of hydraulic cavities is up, and packing element starts to expand.
Plug continues traveling downwardly to stop at annular pressure compensator and is pressurized to packer set pressure value, and packing element is expanded to maximum,
Realized at sealing layer setting.
As further improvement of the utility model, holding screw is connected with the lower circumferential of the lock tube nut, institute
The inner termination of holding screw is stated in the counterbore of the center spud periphery, the lower surface supported underneath of the lock tube nut has
Locking nut, the locking nut are screwed on the center spud.Screwing in holding screw can be by lock tube nut locking in
In heart adapter, prevent lock tube from being malfunctioned in transportation；Locking nut determines the bottom dead centre of sliding sleeve, and anti-anti-skid sheath slips.
As further improvement of the utility model, the packing element total length is 300 ~ 350mm, the width of the setting hoop
For the 1/32 ~ 1/30 of the packing element total length, the spacing between twice setting hoop is the 1/16 ~ 1/15 of the packing element total length.
As a result of reliable twice linear sealing, packing element length of the present utility model is only to be conventional every the 1/3~1/5 of device packing element length
Left and right, and then packer entire length can be made to shorten to below 1.2m, thickness can be competent at completely for the thin interlayers of below 3m
It is setting.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description, accompanying drawing only provides ginseng
Examine and used with explanation, be not used to limit the utility model.
Fig. 1 is the front view of Fig. 1 middle sleeve annular packers.
Fig. 2 is the enlarged drawing at I position in Fig. 1.
Fig. 3 is the enlarged drawing at II position in Fig. 1.
Fig. 4 is the enlarged drawing at III position in Fig. 1.
In figure：1. top connection；2. central tube；3. elastic supporting mechanism；3a. retainer rings；3b. spring steel support rings；3b1.
Flexible flaps；3b2. flexible flaps arc grooves；3c. rubber protecting jackets；3c1. rubber protecting jacket annular recess；4. packing element branch
Seat；4a. packing element bearing tapered slopes；5. packing element；6. setting hoop；7. rubber cylinder pressing cap；8. sliding sleeve；9. center spud；9a. retainings
Lock tooth；10. hydraulic cavities；11. blind plugging；The deep holes of 11a. half；11b. blind plugging V-shaped grooves；12. blind plugging gland；12a. gland through holes；13.
Elastic lock sleeve；14. lock tube nut；15. holding screw；16. locking nut.
Embodiment
As shown in Figures 1 to 4, casing annulus packer of the present utility model includes top connection 1 and central tube 2, top connection 1
Upper end be provided with the box thread that is mutually spun with upper square casing, the upper end of central tube 2 is screwed in the box thread of the lower end of top connection 1；
The middle part of central tube 2 is set with packing element 5, and the upper end of packing element 5 is embedded in packing element bearing 4, and packing element bearing 4 is sleeved on central tube 2
On, elastic supporting mechanism 3, the periphery at the axial direction of packing element 5 middle part are provided between the top of packing element bearing 4 and the lower surface of top connection 1
Provided with twice packing element neck, 6 are bound round embedded with setting respectively in packing element neck, spaced apart, packing element between twice setting binds round 6
5 lower surface is provided with hydraulic compression mechanism.
Packing element 5 is integrally moved up and outwards expanded by the upward extruding of hydraulic compression mechanism, the upper end quilt of packing element 5
It is stuck in packing element bearing 4 and promotes the upward sliding of packing element bearing 4, the reaction force of the elastically supported mechanism 3 of packing element bearing 4, makes
The both ends of packing element 5 are obtained by stable extruding force；Because the middle part of packing element 5 is provided with twice setting hoop 6, the middle part of packing element 5 is blocked and is allowed to
Can not outwards it expand, it is then each above and below twice setting hoop 6 to form the expansion loop for being similar to abacus pearl together；Two
Road expansion loop forms the low regular shape in middle high both sides respectively, because the both sides up and down of each expansion loop are reliably limited and propped up
Support, therefore twice expansion loop is not in distortion, seal line will not move about, and can play a part of twice " O " type sealing ring, shape
Into dual-seal, the sealing effectiveness of packer is effectively increased；Make packer without making up sealing by lengthening packing element length
Sealing effectiveness declines caused by line is travelling.The utility model sets setting hoop 6 at the middle part of packing element 5 and above packing element bearing 4
After elastic supporting mechanism 3 is set so that packing element length of the present utility model is only to be conventional every 1/3~1/5 left side of device packing element length
The right side, and then packer entire length can be made to shorten to below 1.2m, the seat that thickness is the thin interlayers of below 3m can be competent at completely
Envelope.
Elastic supporting mechanism 3 includes the retainer ring 3a and spring steel support ring 3b, retainer ring 3a for being sleeved on the periphery of central tube 2
Upper end be resisted against the lower end of top connection 1, retainer ring 3a lower end is provided with retainer ring horn mouth, the bell-mouthed root of retainer ring with
The retainer ring annular recess being recessed upwards is communicated, and spring steel support ring 3b upper end is inlaid in retainer ring annular recess, spring
The groove that bracing members ring 3b bottom is evenly distributed with multiple tracks lower ending opening makes spring steel support ring 3b bottom form multiple bullets
Property limb 3b1, each flexible flaps 3b1 lower end is flared out respectively.
The lower end that retainer ring 3a is resisted against top connection 1 provides support for spring steel support ring 3b, is withstood when packing element 5 is squeezed
When packing element bearing 4 moves up, each flexible flaps 3b1 further opens in umbrella, and retainer ring annular recess securely fixes bullet
Spring bracing members ring 3b full circle circumferential portion, retainer ring horn mouth are each flexible flaps 3b1 in spring steel support ring 3b lower ends opening
Space and spacing is provided, when being fitted on the outside of each flexible flaps 3b1 on retainer ring horn mouth, it is maximum to have reached opening,
Uniform reaction force is provided to packing element bearing 4 and packing element 5；Simultaneously when packing element 5 is expanded into abacus pearl, that uniformly opens is each
Flexible flaps 3b1 plays a part of supporting bracket, forms support and support to the expansion loop of packing element 5, expansion loop is kept rule
Abacus pearl, realize and linear sealing is realized on same section, and ensure that sealing effectiveness is reliable.
The upper end of packing element bearing 4 lower end provided with up-small and down-big packing element bearing tapered slope 4a, each flexible flaps 3b1 point
It is not resisted against on packing element bearing tapered slope 4a circumference, each packing element bearing tapered slope 4a inclination angle and retainer ring are bell-mouthed
Inclination angle is equal；Each flexible flaps 3b1 root periphery is respectively equipped with flexible flaps arc groove 3b2, and each flexible flaps arc is recessed
Groove 3b2 is located on same circumference and is located at the bell-mouthed root of retainer ring.
Flexible flaps 3b1 lower end is born against on packing element bearing tapered slope 4a circumference so that packing element 5 is squeezed
When withstanding packing element bearing 4 and moving up, each flexible flaps 3b1 further opens along packing element bearing tapered slope 4a in umbrella,
Flexible flaps 3b1 applies reaction force to packing element bearing tapered slope 4a, when flexible flaps 3b1 is flared to inner side and packing element bearing
When tapered slope 4a is bonded completely, each flexible flaps 3b1 outside is just fitted on retainer ring horn mouth, i.e., each flexible flaps
3b1 has been flared to maximum, and support and support are formed to the expansion loop of packing element 5；Flexible flaps arc groove 3b2 causes each elastic valve
Piece 3b1 crooked position is consistent, and the supporting bracket circularity for making each flexible flaps 3b1 be formed after opening is very high, and increase can
Ensure that the regular shape of packing element expansion loop is stable.
Spring steel support ring 3b bottom is provided with rubber protecting jacket 3c, and rubber protecting jacket 3c is covered in each flexible flaps 3b1
Periphery, rubber protecting jacket 3c periphery is concordant with retainer ring 3a periphery, rubber protecting jacket 3c upper end insertion retainer ring loudspeaker
In mouth and flexible flaps arc groove 3b2；Rubber protecting jacket 3c protects with the position that retainer ring 3a lower edges contact provided with rubber
Collar shape groove 3c1.
Rubber protecting jacket 3c periphery is concordant with retainer ring 3a periphery to be advantageous to whole casing annulus packer A with sleeve pipe
Smoothly glide；Rubber protecting jacket 3c by each flexible flaps 3b1 be covered in it is interior can play a protective role, prevent in the process of going into the well
In, the foreign matter that flexible flaps 3b1 lower end is touched on the borehole wall causes tilting impaired；Rubber protecting jacket 3c upper end insertion elasticity
In limb arc groove 3b2, some reinforcement are carried out to position most weak flexible flaps 3b1, and do not influence flexible flaps 3b1's
Open；Rubber protecting jacket annular recess 3c1 is easy to rubber protecting jacket 3c to bend deformation here, prevents rubber protecting jacket 3c to be squeezed
Larger obstruction power is formed after pressure.
Hydraulic compression mechanism includes embracing the sliding sleeve 8 in the periphery of central tube 2, and the top braces of sliding sleeve 8 are in the lower surface of packing element 5
Lower section, the internal perisporium of step realizes and sealed that the upper end of sliding sleeve 8 is provided with sliding sleeve between outer land by O-ring and central tube 2 in sliding sleeve upper end
Rank, rubber cylinder pressing cap 7 is connected with sliding sleeve outer step, the lower end periphery of packing element 5 is plugged in rubber cylinder pressing cap 7；The inner chamber of sliding sleeve 8 is set
There is a center spud 9, the upper end of center spud 9 is screwed on the male thread of the lower end of central tube 2 and the upper end outer step of center spud 9
Periphery wall realizes and sealed that the lower end of center spud 9 is stretched out from the lower end of sliding sleeve 8 by the inwall of O-ring and sliding sleeve 8；On sliding sleeve
Space in end between the lower section of step and the top of center spud upper end outer step forms the hydraulic cavities 10 of sliding sleeve 8；Sliding sleeve 8
Lower port inner chamber is provided with ring cavity, and elastic lock sleeve 13 is provided with ring cavity, and elastic lock sleeve 13 is embraced in the outer of center spud 9
Week, and the inwall of elastic lock sleeve 13 is provided with box thread, the lower end periphery of sliding sleeve 8 is connected with lock tube nut 14, lock tube nut 14
Interior step is resisted against the lower section of elastic lock sleeve 13；The stage casing periphery of the short transverse of center spud 9 is provided with can be with elastic lock sleeve 13
The stopping lock tooth 9a that box thread is engaged.
Rubber cylinder pressing cap 7 limits the lower end of packing element 5, prevents the lower end of its packing element 5 from outwards expanding protrusion；When sliding sleeve 8
Hydraulic cavities 10 fluid power effect under head on packing element 5 it is up when, lock tube nut 14 is up with sliding sleeve 8, and it is suitable to push elastic lock sleeve 13
The outer wall upward sliding of center spud 9, elastic lock sleeve 13, which is provided with axial groove, makes elastic lock sleeve 13 have certain deformation energy
Power, when elastic lock sleeve 13, which is gone upward to, to be engaged with stopping lock tooth 9a, will by monodirectional locking, sliding sleeve 8 can only upward packing element 5,
Even if fluid power disappears, sliding sleeve 8 will not also glide release.
The bottom of central tube 2 is radially symmetrically plugged with least two blind pluggings 11, blind plugging with 10 corresponding position of hydraulic cavities
11 circumference, which is provided with, is easy to the blind plugging V-shaped groove 11b that blind plugging 11 neatly fractures, blind plugging V-shaped groove 11b bottom land and central tube 2
Inwall is concordant, and blind plugging 11 is provided with the half deep hole 11a that ecto-entad extends along blind plugging center line, and half deep hole 11a cecum is than blind plugging V
Axis of the shape groove 11b closer to central tube 2；The external end head of blind plugging 11 is pushed down by blind plugging gland 12 respectively, and blind plugging gland 12 is distinguished
It is screwed in the blind plugging gland screwed hole of center spud 9, blind plugging gland 12 is distributed with multiple to be communicated with half deep hole 11a of blind plugging 11
's.
After blind plugging 11 is inserted into the tube wall of central tube 2, screws on blind plugging gland 12 and compress blind plugging 11, blind plugging 11 is broken off
Before, hydraulic cavities 10 and center tube cavity are obstructed, and now casing annulus packer A is in the lock state, and is prevented during going into the well
It is unexpected that work cause mistake to expand.After plug B is dropped down onto in blind plugging 11, drilling fluid pump is pressurized to packer working pressure, glue
Plug B fractures blind plugging 11 at blind plugging V-shaped groove 11b bottom land, and the drilling fluid of center tube cavity passes through half deep hole at blind plugging center
11a and gland through hole 12a enters the hydraulic cavities 10 of sliding sleeve 8, and the fluid power promotion sliding sleeve 8 of hydraulic cavities 10 is up, and packing element 5 starts swollen
It is swollen.Plug B is continued traveling downwardly to stop at annular pressure compensator C and is pressurized to packer set pressure value, and packing element 5 is expanded to most
Greatly, realized at sealing layer setting.
Holding screw 15 is connected with the lower circumferential of lock tube nut 14, the inner termination of holding screw 15 is embedded in center spud
In the counterbore of 9 peripheries, the lower surface supported underneath of lock tube nut 14 has locking nut 16, and locking nut 16 is screwed in center spud
On 9.Screwing in holding screw 15 can be locked in lock tube nut 14 on center spud 9, prevent lock tube malfunction in transportation
Make；Locking nut 16 determines the bottom dead centre of sliding sleeve 8, and anti-anti-skid sheath 8 slips.
The total length of packing element 5 is 300 ~ 350mm, and the width of setting hoop 6 is the 1/32 ~ 1/30 of packing element total length, twice setting
Spacing between hoop is the 1/16 ~ 1/15 of packing element total length.As a result of reliable twice linear sealing, glue of the present utility model
Tube length degree only to be conventional every 1/3~1/5 or so of device packing element length, and then can make packer entire length shorten to 1.2m with
Under, thickness can be competent at completely for the setting of the thin interlayers of below 3m.
It the foregoing is only the preferable possible embodiments of the utility model, non-therefore limitation patent of the present utility model
Protection domain.In addition to the implementation, the utility model can also have other embodiment.It is all to use equivalent substitution or equivalent change
The technical scheme to be formed is changed, is all fallen within the protection domain of the requires of the utility model.Technology of the utility model without description is special
Sign can be realized by or using prior art, will not be repeated here.
Claims (8)
1. a kind of casing annulus packer, including top connection and central tube, it is characterised in that the upper end of the top connection be provided with
The box thread that upper square casing mutually spins, the upper end of the central tube are screwed in the box thread of top connection lower end；The central tube
Middle part be set with packing element, the position in the wellbore of the packing element is corresponding to the position of well sealing layer；The packing element it is upper
Termination be embedded in packing element bearing in, the packing element bearing is sleeved on the central tube, the top of the packing element bearing with it is described on
Elastic supporting mechanism is provided between the lower surface of joint, the periphery at packing element axial direction middle part is provided with twice packing element neck, described
Spaced apart between setting hoop, twice setting hoop respectively in packing element neck, the lower surface of the packing element is provided with liquid
Force compresses mechanism.
2. casing annulus packer according to claim 1, it is characterised in that：The elastic supporting mechanism includes being sleeved on
The retainer ring and spring steel support ring of the central tube periphery, the upper end of the retainer ring are resisted against the lower end of the top connection,
The lower end of the retainer ring is provided with retainer ring horn mouth, the bell-mouthed root of retainer ring and the retainer ring ring-type being recessed upwards
Groove is communicated, and the upper end of the spring steel support ring is inlaid in the retainer ring annular recess, the spring steel support ring
The groove that bottom is evenly distributed with multiple tracks lower ending opening makes the bottom of spring steel support ring form multiple flexible flaps, each bullet
The lower end of property limb is flared out respectively.
3. casing annulus packer according to claim 2, it is characterised in that：The upper end of the packing element bearing is provided with upper small
Big packing element bearing tapered slope down, the lower end of each flexible flaps bear against the circle in the packing element bearing tapered slope
Zhou Shang, the inclination angle and the bell-mouthed inclination angle of the retainer ring of each packing element bearing tapered slope are equal；The root of each flexible flaps
Portion periphery is respectively equipped with flexible flaps arc groove, and each flexible flaps arc groove is located on same circumference and is located at institute
State the bell-mouthed root of retainer ring.
4. casing annulus packer according to claim 3, it is characterised in that：The bottom of the spring steel support ring is provided with
Rubber protecting jacket, the rubber protecting jacket are covered in the periphery of each flexible flaps, the periphery of the rubber protecting jacket and institute
State that the periphery of retainer ring is concordant, the upper end of the rubber protecting jacket is embedded in the retainer ring horn mouth and the flexible flaps arc
In groove；The position that the rubber protecting jacket contacts with the retainer ring lower edge is provided with rubber protecting jacket annular recess.
5. casing annulus packer according to claim 1, it is characterised in that：The hydraulic compression mechanism includes embracing in institute
The sliding sleeve of central tube periphery is stated, the top braces of the sliding sleeve are in the lower section of the packing element lower surface, the sliding sleeve upper end Nei Tai
The internal perisporium of rank realizes and sealed that the upper end of the sliding sleeve is provided with sliding sleeve outer step, the sliding sleeve by O-ring and the central tube
Rubber cylinder pressing cap is connected with outer step, the lower end periphery of the packing element is plugged in the rubber cylinder pressing cap；The inner chamber of the sliding sleeve
Provided with center spud, the upper end of the center spud is screwed on the male thread of central tube lower end and center spud upper end outer step
Periphery wall realize and seal that the lower end of the center spud is from the lower end of the sliding sleeve by the inwall of O-ring and the sliding sleeve
Stretch out；Described in space in the sliding sleeve upper end between the lower section of step and the top of center spud upper end outer step is formed
The hydraulic cavities of sliding sleeve；The lower port inner chamber of the sliding sleeve is provided with ring cavity, is provided with elastic lock sleeve in the ring cavity, institute
Elastic lock sleeve is stated to embrace in the periphery of the center spud, and the inwall of the elastic lock sleeve is provided with box thread, under the sliding sleeve
End periphery is connected with lock tube nut, and the interior step of the lock tube nut is resisted against the lower section of the elastic lock sleeve；The center connects
The stage casing periphery of pipe short transverse is provided with the stopping lock tooth that can be engaged with the box thread of elastic lock sleeve.
6. casing annulus packer according to claim 5, it is characterised in that：The bottom of the central tube and the hydraulic pressure
The corresponding position of chamber is radially symmetrically plugged with least two blind pluggings, and the circumference of the blind plugging, which is provided with, is easy to blind plugging neatly to fracture
Blind plugging V-shaped groove, the bottom land of the blind plugging V-shaped groove is concordant with the inwall of the central tube, and the blind plugging is provided with ecto-entad edge
Half deep hole of blind plugging center line extension, the axis of the cecum of half deep hole than the blind plugging V-shaped groove closer to the central tube；
The external end head of the blind plugging is pushed down by blind plugging gland respectively, and the blind plugging gland is screwed in the blind plugging pressure of the center spud respectively
In lid screwed hole, multiple gland through holes communicated with half deep hole of the blind plugging are distributed with the blind plugging gland.
7. casing annulus packer according to claim 6, it is characterised in that：Revolved on the lower circumferential of the lock tube nut
Holding screw is connected to, the inner termination of the holding screw is embedded in the counterbore of the center spud periphery, the lock tube nut
Lower surface supported underneath has locking nut, and the locking nut is screwed on the center spud.
8. casing annulus packer according to claim 1, it is characterised in that：The packing element total length is 300 ~ 350mm,
The width of the setting hoop is the 1/32 ~ 1/30 of the packing element total length, and the spacing between twice setting hoop is total for the packing element
The 1/16 ~ 1/15 of length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720817671.6U CN207131367U (en) | 2017-07-07 | 2017-07-07 | A kind of casing annulus packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720817671.6U CN207131367U (en) | 2017-07-07 | 2017-07-07 | A kind of casing annulus packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207131367U true CN207131367U (en) | 2018-03-23 |
Family
ID=61634061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720817671.6U Active CN207131367U (en) | 2017-07-07 | 2017-07-07 | A kind of casing annulus packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207131367U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593804A (en) * | 2019-10-09 | 2019-12-20 | 太仓优尼泰克精密机械有限公司 | Umbrella type anti-extrusion ring |
| CN110640017A (en) * | 2018-06-27 | 2020-01-03 | 中国石油化工股份有限公司 | Composite material pipe compression molding device and method |
| CN111963098A (en) * | 2020-08-28 | 2020-11-20 | 大庆华油石油科技开发有限公司 | Compression packer |
-
2017
- 2017-07-07 CN CN201720817671.6U patent/CN207131367U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110640017A (en) * | 2018-06-27 | 2020-01-03 | 中国石油化工股份有限公司 | Composite material pipe compression molding device and method |
| CN110593804A (en) * | 2019-10-09 | 2019-12-20 | 太仓优尼泰克精密机械有限公司 | Umbrella type anti-extrusion ring |
| CN111963098A (en) * | 2020-08-28 | 2020-11-20 | 大庆华油石油科技开发有限公司 | Compression packer |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190823 Address after: Jiangsu province Yangzhou City Wenhui Road 225009 No. 1 Co-patentee after: SINOPEC OILFIELD SERVICE CORPORATION Patentee after: China Petroleum Chemical Industry Group Co Ltd Co-patentee after: SINOPEC EAST CHINA PETROLEUM ENGINEERING CO., LTD. Address before: 225261 Jiangsu Province, Yangzhou city Jiangdu District Shaobo Gantang Road No. 101 Co-patentee before: SINOPEC EAST CHINA PETROLEUM ENGINEERING CO., LTD. Patentee before: SINOPEC OILFIELD SERVICE CORPORATION |