CN110145270A - Slip assemblies and bridge plug - Google Patents
Slip assemblies and bridge plug Download PDFInfo
- Publication number
- CN110145270A CN110145270A CN201910326627.9A CN201910326627A CN110145270A CN 110145270 A CN110145270 A CN 110145270A CN 201910326627 A CN201910326627 A CN 201910326627A CN 110145270 A CN110145270 A CN 110145270A
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- Prior art keywords
- tube
- head
- packing element
- ring
- central tube
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- 230000000712 assembly Effects 0.000 title abstract description 11
- 238000000429 assembly Methods 0.000 title abstract description 11
- 240000005546 Piper methysticum Species 0.000 claims abstract description 10
- 235000016787 Piper methysticum Nutrition 0.000 claims abstract description 10
- 238000012856 packing Methods 0.000 claims description 73
- 230000002093 peripheral effect Effects 0.000 claims description 28
- 238000005520 cutting process Methods 0.000 claims description 20
- 238000001125 extrusion Methods 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 241001344919 Aulichthys japonicus Species 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 208000007623 Lordosis Diseases 0.000 description 19
- 239000013013 elastic material Substances 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Prostheses (AREA)
- Dowels (AREA)
Abstract
The present invention relates to mechanical structure fields, it is intended to solve the problems, such as that existing kava structure is easy to appear laterally offset or seat card is insecure stable, provide slip assemblies and bridge plug.Kava structure includes: central tube, and front end is set as tube head section, and tube head section center is recessed slide opening；The outer periphery of tube head section is provided with multiple circumferentially distributed sliding slots；The bottom surface of sliding slot is sliding bevel outwardly；End part includes the end head of front and the slide-bar portion at rear portion；Slide-bar portion is axially slidably matched in the slide opening of central tube；Multiple slips pieces, the rear end face inclined wedge of slips piece radially inner side is matched with sliding bevel, and the front end face inclined wedge of slips piece radially inner side is matched with the inclined-plane outwardly of end head, so that in the sliding of central tube opposite end head, the resultant force for the active force from tube head section and end head that slips piece is subject to by two inclined wedges cooperation slips piece can be driven to be moved radially outwards the beneficial effects of the invention are as follows be not in laterally offset and to sit card secured.
Description
Technical field
The present invention relates to mechanical structure fields, in particular to slip assemblies and bridge plug.
Background technique
The important component of bridge plug when kava structure, playing makes bridge plug and casing form the function of sitting card.
Then laterally offset is easy with the slip assemblies solved the problems, such as or seat card is insecure stable.
Summary of the invention
The present invention is intended to provide a kind of slip assemblies and bridge plug, are easy laterally offset or seat to solve existing slip assemblies
Block insecure stable problem.
The embodiment of the present invention is achieved in that
The embodiment of the present invention provides a kind of kava structure comprising:
Central tube, front end are set as tube head section, and tube head section center is recessed slide opening；The outer periphery of tube head section is provided with
Multiple circumferentially distributed sliding slots；The bottom surface of sliding slot is sliding bevel outwardly；
End part, end part include the end head of front and the slide-bar portion at rear portion；Slide-bar portion axially slidably cooperates
In the slide opening of the central tube so that the central tube can the relatively described end part slide axially；The rear end of end head
Face has inclined-plane outwardly；
Multiple slips pieces, the rear end face inclined wedge of slips piece radially inner side are matched with the sliding bevel and slips piece diameter
Front end face inclined wedge inwardly is matched with the inclined-plane outwardly of end head, so that in the sliding of central tube opposite end head, slips
The resultant force for the active force from tube head section and end head that piece is subject to by two inclined wedge cooperations can drive slips piece along diameter
To being displaced outwardly.
In use, being pressed into central tube after the position of end part is fixed, central tube squeezes forward each slips piece, slips
Piece is squeezed between central tube and end part to be moved radially outwards by inclined wedge cooperation until the lateral surface of slips piece is close to
Casing realizes seat card.
In one embodiment:
The sliding slot is set as T-type guide groove, and accordingly the two sides of the slips piece are extended outward to form for being slidably matched
In the lug of T-type guide groove lower channel section；The upper and lower surface of lug is parallel to the sliding bevel of sliding slot.The set-up mode, Neng Goufang
Only slips laterally offset during the well entry process, cause slips periphery and casing-contact and, formed and meet card, meanwhile, sat in slips
It also can be uniformly flared out along the bottom bevel of T shape guide groove when card, so that slips is sat card reliable and stable.
In one embodiment:
The front of the slips piece includes head and neck, and the front end face on head is the inclined-plane cooperated with end head inclined wedge；
The wide of head is greater than the wide to size of neck to size；
The rear end of end head is provided with the sliding slot of tube head section that is circumferentially distributed and corresponding the central tube and is used for
Receive and mate with the T-type holding tank of head and neck；
The T-type guide groove limits slips piece rear portion along lateral movement；The T-type holding tank limits slips piece front along side
To activity, the slips piece is limited in laterally offset during moving radially outwards that is squeezed with collaboration.
In one embodiment:
The cooperation inclined-plane of inclined wedge cooperation and the axis direction of central tube between the slips piece and tube head are in 12 °, institute
The cooperation inclined-plane of the inclined wedge cooperation between slips piece and end head and the axis direction of central tube are stated in 78 °.
The embodiment of the present invention also provides a kind of bridge plug, with kava structure above-mentioned.
It is optional:
Central tube include the shell of column with column outer peripheral surface, the axial forward end of shell of column be the radially enlarged tube head section,
The shaft shoulder is formed between tube head section and shell of column；
Bridge plug further include: packing element component is set in the outer peripheral surface of shell of column；
Extrusion ring is threadedly connected to the outer peripheral surface of the axial rearward end of shell of column, and extrusion ring can be on shell of column along axial direction
Precession, and packing element component is applied along axial extruding force, effect of the packing element component in the extruding force using the shaft shoulder as position restriction
Under be radially elastically deformable to close to casing realize seal.
It is optional:
Packing element component includes the preceding tensioner ring group that shell of column periphery is sequentially sleeved at along axial direction, inner cone pad, middle part packing element, rear cone
Pad and rear tensioner ring group；
The preceding tensioner ring group, the rear tensioner ring group form deformable structure by way of opening up joint-cutting respectively, with
It is set radially to expand when being squeezed；The middle part packing element structure be fabricated from a flexible material, and its by squeeze
Deformation radially can occur when pressure so that when packing element component is by along axial extruding force: a) extrusion ring and
Afterwards cone pad both drive rear tensioner ring radially expand the resultant force of the active force of rear tensioner ring group, b) inner cone pad and afterwards bore
Both pads drive middle part to the resultant force of the active force of middle part packing element, and packing element is radially expanded, c) both the shaft shoulder and inner cone pad are right
Tensioner ring is radially expanded before the resultant force of the active force of preceding tensioner ring group drives.
It is optional:
The extrusion ring includes lock tube and lock ring；The lock tube nose threads are matched with central tube periphery, the lock ring set
Between the outer peripheral surface of the shell of column of the inner peripheral surface and central tube at the lock tube rear portion, and the inner peripheral surface of lock ring and shell of column form spiral shell
The inner peripheral surface formation of line cooperation, the outer peripheral surface of lock ring and lock tube is threadedly engaged, and realizes that the screw thread of extrusion ring is squeezed and locked.
In summary it describes, the slip assemblies in the embodiment of the present invention have the function of to prevent premature setting, and slips sits card
When reliable and stable beneficial effect.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
A kind of embodiment of the bridge plug in the present embodiment is shown in Fig. 1；
The three-dimensional view (cross-section displaying) of bridge plug is shown in Fig. 2；
Fig. 3 is the structural schematic diagram of anti-sticking component；
The three-dimensional view of pipe centered on Fig. 4；
Fig. 5 is the three-dimensional view of end part；
Fig. 6 is the three-dimensional view of slips piece；
The topology view of packing element component is shown in Fig. 7；
Fig. 8 is the topology view of preceding recessed tensioner ring；
Fig. 9 is the cross-sectional view of preceding recessed tensioner ring；
Figure 10 is the topology view of lordosis tensioner ring；
Figure 11 is the cross-sectional view of lordosis tensioner ring；
Figure 12 is the topology view of middle packing element；
Figure 13 is the topology view for holding packing element；
Figure 14 is the topology view of inner cone pad；
Figure 15 is the cross-sectional view of inner cone pad；
Figure 16 is the topology view for protecting bowl；
Figure 17 is the cross-sectional view for protecting bowl；
Figure 18 bores the topology view of pad after being；
Figure 19 bores the cross-sectional view of pad after being；
Figure 20 is the topology view of rear intramedullary expansion ring；
Figure 21 is the cross-sectional view of rear intramedullary expansion ring；
Figure 22 is the topology view of rear outer tensioner ring；
Figure 23 is the cross-sectional view of rear outer tensioner ring；
Figure 24 is the structural schematic diagram that packing element component is in setting state.
Icon: 100- bridge plug；The anti-sticking component of 1-；2- central tube；The end 3- part；4- slips piece；5- packing element component；6- is squeezed
Ring；7- shell of column；8- tube head section；The 9- shaft shoulder；10- casing；11- lock tube；12- lock ring；The anti-sticking packing element of 13-；The anti-deck of 14-；15- is convex
Ring；16- concave ring；17- slip assemblies；The rear end face of P2- radially inner side；P1- sliding bevel；The front end face of P4- radially inner side；
The inclined-plane of P3- outwardly；19- slide opening；20- sliding slot；21- end head；22- slide-bar portion；23- lug；The head 24-；25- neck；26-
T-type holding tank；Tensioner ring group before 27-；28- inner cone pad；Packing element in the middle part of 29-；Pad is bored after 30-；Tensioner ring group after 31-；Glue in 32-
Cylinder；The end 33- packing element；34- protects bowl；35- joint-cutting；Recessed tensioner ring before 36-；37- lordosis tensioner ring；38- annular groove；39- ring convex；
40- pillar；41- shrinkage pool；42- joint-cutting；Intramedullary expansion ring after 43-；Outer tensioner ring after 44-；45- concave ring；46- bulge loop；47- joint-cutting；
48- first stitches section；49- second stitches section；50- third stitches section；51- annular groove；53- movable part.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that if occur term " center ", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings,
Either the invention product using when the orientation or positional relationship usually put, be merely for convenience of the description present invention and simplification retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.If only being used in addition, occurring term " first ", " second " etc. in description of the invention
It is described in distinguishing, is not understood to indicate or imply relative importance.
If being not offered as requiring component absolute in addition, occurring the terms such as term "horizontal", "vertical" in description of the invention
Horizontal or pendency, but can be slightly tilted.If "horizontal" only refers to that its direction is more horizontal with respect to for "vertical", not
It is to indicate that the structure is had to fully horizontally, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, if there is term
" setting ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachably connect
It connects, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediate matchmaker can also be passed through
Jie is indirectly connected, and can be the connection inside two elements.It for the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in the present invention.
Embodiment
Referring to Fig. 1, Fig. 2, the present invention provides a kind of bridge plug 100, and the front of bridge plug 100 is provided with anti-sticking component 1.
The bridge plug 100 includes central tube 2, end part 3, multiple slips pieces 4, packing element component 5, extrusion ring 6.
Central tube 2 is axially slidably matched with end part 3；Slips piece 4 is matched between central tube 2 and end part 3, and
And when 2 stress of central tube is compressed axially towards 3 direction of end part, pass through the cooperation of the inclined wedge of central tube 2 and slips piece 4 and end
The cooperation of the inclined wedge of part 3 and slips piece 4, central tube 2 and end part 3 to the resultant force of slips piece 4 can drive slips piece 4 radially to
Outer mobile realize sits card.
Central tube 2 include the shell of column 7 with column outer peripheral surface, the axial forward end of shell of column 7 be radially enlarged tube head section 8,
The shaft shoulder 9 is formed between tube head section 8 and shell of column 7；Packing element component 5 is set in the outer peripheral surface of shell of column 7.Extrusion ring 6 is threadedly connected to column
Section 7 axial rearward end outer peripheral surface, and extrusion ring 6 can on shell of column 7 along axial precession, and with the shaft shoulder 9 be position restriction pair
Packing element component 5 applies along axial extruding force, and under the action of the extruding force flexible deformation radially occurs for packing element component 5
It is sealed to being realized close to casing 10.
This is optional, and extrusion ring 6 includes lock tube 11 and lock ring 12；11 nose threads of lock tube are matched with 2 periphery of central tube, lock
Ring 12 is sheathed between the inner peripheral surface at 11 rear portion of lock tube and the outer peripheral surface of the shell of column 7 of central tube 2, and the inner peripheral surface and column of lock ring 12
7 formation of section is threadedly engaged, the inner peripheral surface formation of the outer peripheral surface of lock ring 12 and lock tube 11 is threadedly engaged, and realizes the screw thread of extrusion ring 6
It squeezes and locks.
Bridge plug 100 in the present embodiment has anti-sticking component 1, and axial one end of anti-sticking component 1 is configured for connecting
In the front end of bridge plug 100, in the present embodiment, anti-sticking component 1 is connected to the front end of end part 3.
Referring to Fig. 3, the axial other end of the anti-sticking component 1 in the present embodiment is the anti-stuck glue being made of elastic material for cooperation
Cylinder 13.Optionally, the one anti-deck 14 of axial connection of anti-sticking packing element 13 of anti-sticking component 1, and connection is realized by the anti-deck 14
In 100 front end of bridge plug.Optionally, anti-deck 14 is made of metal or alloy (such as almag), and front end axially reduces, and
And the bulge loop 15 of multiple axially spaced distributions is arranged in the outer peripheral surface of its front end；The rear end of anti-sticking packing element 13 is socketed on anti-sticking seat 14
Front end, and be arranged cooperation bulge loop 15 concave ring 16.In one embodiment, chamfering is arranged in the front end of anti-sticking packing element 13, makes
The outer peripheral surface for obtaining anti-sticking 13 front of packing element is in the conical surface.The elastic material for constituting anti-sticking packing element 13 can dissolve to be flexible
Rubber.
Bridge plug 100 on the market, can if cannot pass through when deforming more serious by casing 10 at present
Formation 100 front of bridge plug is stuck with casing 10, brings many difficulties to post-processing measure.
Anti-sticking component 1 disclosed in this programme, front end are set as the anti-sticking packing element 13 being made of elastic material, when matching
The bridge plug 100 of this anti-sticking component 1 is equipped with when deforming more serious by casing 10, is having for 100 front end of bridge plug first
13 part of anti-sticking packing element of elasticity is contacted with casing 10, it is not easy to stuck in casing 10.So when that cannot pass through, it can
With easily upper lifting pipe post, bridge plug 100 is entirely taken out easily, to do next step measure, will not be made in casing 10
At complex situations.
It should be noted that the above-mentioned anti-sticking packing element 13 being made of elastic material, refers to the anti-sticking packing element 13 in stress
Flexible deformation can occur.Concept " preceding " and " rear " in front-end and back-end above-mentioned should be assert are as follows: bridge plug 100 is in use, first
One end of sleeve pipe 10 corresponds to concept " preceding ", otherwise corresponding concept " rear ".
Central tube 2, end part 3 in the present embodiment and a kind of novel slip assemblies are cooperatively formed between slips three
17；Three's specific structure can be with further reference to the perspective view shown in Fig. 4, Fig. 5, Fig. 6.Cooperation is referring to Fig. 1, Fig. 2 and Fig. 4, figure
5 and Fig. 6,
In the present embodiment, the rear end face P2 inclined wedge of 4 radially inner side of slips piece is matched with sliding bevel P1 and slips piece 4
The front end face P4 inclined wedge of radially inner side is matched with the inclined-plane P3 outwardly of end head 2421, so that in 2 opposite end head 3 of central tube
When sliding, the resultant force for the active force from tube head section 8 and end head 21 that slips piece 4 is subject to by two inclined wedge cooperations can
Slips piece 4 is driven to be moved radially outwards.
In this embodiment, referring to fig. 4,2 front end of central tube is set as tube head section 8, and 8 center of tube head section is recessed cunning
Hole 19；The outer periphery of tube head section 8 is provided with multiple circumferentially distributed sliding slots 20；The bottom surface of sliding slot 20 is sliding bevel outwardly
P1.Referring to Fig. 5, end part 3 includes the end head 21 of front and the slide-bar portion 22 at rear portion；Slide-bar portion 22 axially slidably matches
Together in the slide opening 19 of central tube 2 so that central tube 2 can opposite end head 3 slide axially；The rear end mask of end head 21
There is inclined-plane P3 outwardly.Referring to Fig. 6, the rear end face P2 inclined wedge of 4 radially inner side of slips piece is matched with sliding bevel P1 and slips
The front end face P4 inclined wedge of 4 radially inner side of piece is matched with the inclined-plane P3 outwardly of end head 21, so that in 2 opposite end head of central tube
When 3 sliding, the resultant force energy for the active force from tube head section 8 and end head 21 that slips piece 4 is subject to by two inclined wedge cooperations
Slips piece 4 is enough driven to be moved radially outwards.
In use, being pressed into central tube 2 after the position of end part 3 is fixed, central tube 2 squeezes forward each slips piece 4,
Slips piece 4 is squeezed between central tube 2 and end part 3 to be moved radially outwards by inclined wedge cooperation until outside slips piece 4
Casing 10 is close in side, that is, realizes seat card.Optionally, sliding slot 20 is set as T-type guide groove, accordingly two sides of slips piece 4 to
The lug 23 for being slidably fitted in T-type guide groove lower channel section is extended to form outside；The upper and lower surface of lug 23 is parallel to sliding slot 20
Sliding bevel P1.In this embodiment, the front of slips piece 4 includes head 24 and neck 25, and the front end face on head 24 is
With the inclined-plane of 21 inclined wedge of end head cooperation；The wide of head 24 is greater than the wide to size of neck 25 to size；The rear end of end head 21
It is provided with the sliding slot 20 of tube head section 8 that is circumferentially distributed and corresponding central tube 2 and for receiving and mating with head 24 and neck
The T-type holding tank 26 in portion 25；T-type guide groove limits 4 rear portion of slips piece along lateral movement；Before T-type holding tank 26 limits slips piece 4
Portion is along lateral activity, with collaboration limitation slips piece 4 in laterally offset during moving radially outwards that is squeezed.This sets
Set mode, slips laterally offset during the well entry process can be prevented, cause slips periphery contacted with casing 10 and, formed meet
Card, meanwhile, it also can be uniformly flared out along the bottom bevel of T shape guide groove when slips is sat and blocked, so that slips is sat card reliable and stable.
In the present embodiment, the cooperation inclined-plane for cooperating the inclined wedge between slips piece 4 and tube head 24 can be set in
The axis direction of heart pipe 2 is in 12 °, the axis on the cooperation inclined-plane and central tube 2 of the inclined wedge cooperation between slips piece 4 and end head 21
Direction is in 78 °.
Therefore, the structure of the slip assemblies 17 in the application, which has, is not easy to meet card, and slips is sat card and reliable and stable had
Beneficial effect.
Packing element component 5 in the present embodiment can realize the sealing with casing 10, referring to Fig. 7-Figure 23, in a kind of embodiment
In:
Packing element component 5 in the present embodiment includes the preceding tensioner ring group that 7 periphery of shell of column is successively abutted and be set in along axial direction
27, inner cone pad 28, middle part packing element 29, rear cone pad 30 and rear tensioner ring group 31；
Preceding tensioner ring group 27, rear tensioner ring group 31 form deformable structure by way of opening up joint-cutting 35 respectively, so that
It can radially be expanded when being squeezed；Packing element 29 structure in middle part is to be fabricated from a flexible material, and it is when being squeezed
Deformation radially can occur, so that when packing element component 5 is by along axial extruding force: a) extrusion ring 6 is with after
Both cone pads 30 drive rear tensioner ring radially to be expanded the resultant force of the active force of rear tensioner ring group 31, b) 28 He of inner cone pad
Afterwards both cone pads 30 drive middle part packing element 29 radially to be expanded the resultant force of the active force of middle part packing element 29, c) 9 He of the shaft shoulder
Tensioner ring is radially expanded before both inner cone pads 28 drive the resultant force of the active force of preceding tensioner ring group 27.Packing element component 5
State after setting referring to fig. 24.
In the present embodiment, the step surface at the shaft shoulder 9 is set as step surface outwardly, and the front end face of extrusion ring 6 is set as court
Outer compressive plane；The front end face of inner cone pad 28, the rear rear end face for boring pad 30 are disposed as the conical surface outwardly；Preceding tensioner ring group 27
Axial ends face is disposed as the conical surface inwardly；The axial ends face of tensioner ring group 31 is disposed as the conical surface inwardly afterwards；At this
Angle between the normal vector for referring to the face " outwardly " and radially outward direction vector in the face of description is less than 90 °；Relatively, originally
Angle between the normal vector for referring to the face " inwardly " and radially outward direction vector in the face of described in the text is greater than 90 ° of feelings
Shape；
The front end face of the cooperation of the first inclined wedge, inner cone pad 28 is formed between the step surface of the shaft shoulder 9 and the front end face of preceding tensioner ring
The cooperation of the second inclined wedge is formed between the rear end face of preceding tensioner ring group 27, so that in packing element component 5 by along axial extruding force
When, the power and inner cone pad 28 that preceding tensioner ring group 27 is applied by the shaft shoulder 9 by the cooperation of the first inclined wedge are cooperated by the second inclined wedge to be applied
Tensioner ring is radially expanded before the resultant force of the power added drives；
The rear end of the cooperation of third inclined wedge, rear cone pad 30 is formed between the compressive plane of extrusion ring 6 and the rear end face of rear tensioner ring
The cooperation of the 4th inclined wedge is formed between face and the front end face of rear tensioner ring group 31, so that in packing element component 5 by along axial extruding
When power, rear tensioner ring group 31 is squeezed the power that ring 6 is applied by the cooperation of third inclined wedge and rear cone pad 30 is matched by the 4th inclined wedge
The resultant force for closing the power applied drives rear tensioner ring radially to be expanded.
In the present embodiment, middle part packing element 29 includes the end packing element that middle packing element 32 and two are divided into middle 32 axial ends of packing element
33；End packing element 33 is socketed with the protection bowl 34 of rigid material composition far from one end outer surface of middle packing element 32；Protect the bowl of bowl 34
There are multiple joint-cuttings 35 along circumferentially distributed, so that bowl edge can radially open when protection bowl 34 is squeezed.Optionally, in
The both ends of the surface of packing element 32 are set as the conical surface outwardly；The conical surface of packing element 33 respectively inwardly close to the end face of middle packing element 32 is held, with
Inclined wedge cooperation is formed with the both ends of the surface of middle packing element 32 respectively.The axial length of middle packing element 32 is greater than end packing element 33, and middle packing element 32
From inner circumferential surface concave shape cyclization connected in star 51, annular groove 51 is located at the axial middle position of middle packing element 32.In the present embodiment,
The both ends of the surface taper of settable middle packing element 32 is equal, so that the surfaces of revolution of middle packing element 32 is approximate isosceles trapezoid；Annular groove 51
Section formed and be also configured as the slot structure of approximate isosceles trapezoid.
In one embodiment, preceding tensioner ring group 27 includes mutually matched preceding recessed tensioner ring 36 and lordosis tensioner ring
37；Preceding recessed tensioner ring 36 is recessed annular groove 38, lordosis tensioner ring 37 by nearby recessed expansion close to the end face of lordosis tensioner ring 37
The end face evagination of ring 36 forms the ring convex 39 of cooperation annular groove 38, so that both rear intramedullary expansion ring 43 and rear outer tensioner ring 44 can lead to
It crosses annular groove 38 and the formation of ring convex 39 axially engages；Preceding recessed tensioner ring 36 is additionally provided with circumferentially spaced close to the end face of lordosis expanded ring
Multiple pillars 40 of distribution, lordosis expanded ring are equipped with the shrinkage pool of each pillar 40 of corresponding matching by the end face of nearby recessed tensioner ring 36
41, each pillar 40 be plugged in each shrinkage pool 41 correspondingly formed it is mating；Preceding recessed tensioner ring 36 and lordosis expansion
Ring 37 is circumferentially distributed respectively multiple joint-cuttings 42, and the joint-cutting in the two under mating connection state, on preceding recessed tensioner ring 36
42 offset one from another with the joint-cutting 42 on lordosis tensioner ring 37.In the present embodiment, preceding recessed tensioner ring 36 and lordosis tensioner ring 37 are respective
Recessed tensioner ring 36 and lordosis tensioner ring 37 to before cutting off are radially extended, recessed tensioner ring 36 and lordosis tensioner ring 37 are respective before making
Multiple joint-cuttings 42 be divided into the arch sections of multiple disconnections.
In the present embodiment, the joint-cutting 42 on lordosis tensioner ring 37 is provided at each shrinkage pool 41, on preceding recessed tensioner ring 36
Joint-cutting 42 is arranged between every group of adjacent pillar 40, so that in the mating connection shape of preceding recessed tensioner ring 36 and lordosis tensioner ring 37
Under state, the joint-cutting 42 on joint-cutting 42 and lordosis tensioner ring 37 on preceding recessed tensioner ring 36 offsets one from another.Tensioner ring group 31 includes afterwards
Intramedullary expansion ring 43 and rear outer tensioner ring 44 after mutually matched；End face concave shaped of the intramedullary expansion ring 43 close to rear outer tensioner ring 44 afterwards
The bulge loop 46 of cooperation concave ring 45 is formed close to the end face evagination of rear intramedullary expansion ring 43 at concave ring 45, rear outer tensioner ring 44, so that after
Both intramedullary expansion ring 43 and rear outer tensioner ring 44 can be axially engaged by concave ring 45 and the formation of bulge loop 46；Intramedullary expansion ring 43 is remote afterwards
The inner peripheral surface of one end from rear outer tensioner ring 44 is for forming the conical surface inwardly of inclined wedge cooperation, rear outer expansion with rear cone pad 30
The inner peripheral surface of the one end of ring 44 far from rear intramedullary expansion ring 43 is for the compressive plane formation inclined wedge cooperation with extrusion ring 6 inwardly
The conical surface；The ring wall of the ring wall of intramedullary expansion ring 43 and rear outer tensioner ring 44 is offered respectively along respectively circumferentially distributed joint-cutting 47 afterwards,
The joint-cutting 47 is from the outer of the respective conical surface and extends internally, but not axially through ring wall, so that rampart portion point keeps closing
Annular.The joint-cutting 47 on intramedullary expansion ring 43 and rear outer tensioner ring 44 is set as the oblique Z-type of approximation afterwards comprising sequentially connected the
One seam section 48, second stitches section 49 and third stitches section 50；Second seam section 49 extends along radial direction is approximately parallel to；First seam section
48 are connected to one end of the second seam section 49, and in obtuse angle with the first seam section 48；Third seam section 50 is connected to the one of the second seam section 49
End, and in obtuse angle with the first seam section 48；Rear intramedullary expansion ring 43 and rear outer tensioner ring 44 are partitioned into movable part 53 by joint-cutting 47, activity
The circumferential one end in portion is fixed, and the other end can expand outwardly freely and when being squeezed.
In the present embodiment, when packing element component 5 is by extruding force from extrusion ring 6, the active force is along rear intramedullary expansion
Recessed tensioner ring 36 successively transmits ring 43 forward.While each part stress, rear outer tensioner ring 44 and rear intramedullary expansion ring 43 are opened outward
It opens, until outer circle touch casing 10；Middle packing element 32 is squeezed to when outer rim expansion, and protection bowl 34 opens therewith, centering packing element 32
It plays a protective role, meanwhile, preceding recessed tensioner ring 36 and lordosis tensioner ring 37 open until touching casing 10.When bridge plug 100 is setting,
The stress of outer tensioner ring 44 and rear intramedullary expansion ring 43 is maximum afterwards, so tiltedly to facilitate its receiving higher for the design of zigzag slot
Setting power, preceding recessed tensioner ring 36 and lordosis tensioner ring 37 stress when bridge plug 100 is setting are minimum, so its slot radially is more
Be conducive to be flared out.Outer tensioner ring 44 and rear intramedullary expansion ring 43, preceding recessed tensioner ring 36 and lordosis tensioner ring 37 are after opening afterwards
Casing 10 is touched, effect is to make that bowl 34 is protected to be protected, and before such case, the protective effect that middle packing element 32 is subject to is not only
From protection bowl 34, also from the protection of preceding tensioner ring group 27 and rear 31 pairs of protection bowls 34 of tensioner ring group, so packing element group
Bearing capacity of the part 5 when heating 130 DEG C still is able to reach 70MPa.
In other embodiments of the invention, packing element component 5 can also cast out inner cone pad 28 above-mentioned and rear cone pad 30, and
The axial ends face of middle part packing element 29 is respectively set to the conical surface outwardly, is formed with substituting inner cone pad 28 and preceding tensioner ring group 27
Pad 30 is bored after the cooperation of second inclined wedge, substitution and rear tensioner ring group 31 forms the cooperation of the 4th inclined wedge.
The bridge plug proposed in the embodiment of the present invention can be set to complete solvable bridge plug, wherein removing packing element component and anti-stuck glue
Component except cylinder can be used almag and be made.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of kava structure characterized by comprising
Central tube, front end are set as tube head section, and tube head section center is recessed slide opening；The outer periphery of tube head section is provided with multiple
Circumferentially distributed sliding slot；The bottom surface of sliding slot is sliding bevel outwardly；
End part, end part include the end head of front and the slide-bar portion at rear portion；Slide-bar portion is axially slidably matched with institute
State in the slide opening of central tube so that the central tube can the relatively described end part slide axially；The rear end mask of end head
There is inclined-plane outwardly；
Multiple slips pieces, the rear end face inclined wedge of slips piece radially inner side is matched with the sliding bevel and slips piece diameter is inside
The front end face inclined wedge of side is matched with the inclined-plane outwardly of end head, so that slips piece is logical in the sliding of central tube opposite end head
Cross the active force from tube head section and end head that two inclined wedges cooperation is subject to resultant force can drive slips piece radially to
Outer movement.
2. kava structure according to claim 1, it is characterised in that:
The sliding slot is set as T-type guide groove, and accordingly the two sides of the slips piece are extended outward to form for being slidably fitted in T-type
The lug of guide groove lower channel section；The upper and lower surface of lug is parallel to the sliding bevel of sliding slot.
3. kava structure according to claim 2, it is characterised in that:
The front of the slips piece includes head and neck, and the front end face on head is the inclined-plane cooperated with end head inclined wedge；Head
Wide be greater than the wide to size of neck to size；
The rear end of end head is provided with the sliding slot of tube head section that is circumferentially distributed and corresponding the central tube and for accommodating
With the T-type holding tank of engagement head and neck；
The T-type guide groove limits slips piece rear portion along lateral movement；The T-type holding tank limits slips piece front along lateral
Activity limits the slips piece in laterally offset during moving radially outwards that is squeezed with collaboration.
4. kava structure according to claim 2, it is characterised in that:
The cooperation inclined-plane of inclined wedge cooperation and the axis direction of central tube between the slips piece and tube head are in 12 °, the card
The cooperation inclined-plane of inclined wedge cooperation and the axis direction of central tube between tile and end head are in 78 °.
5. a kind of bridge plug, it is characterised in that: have the described in any item kava structures of claim 1-4.
6. bridge plug according to claim 5, it is characterised in that:
Central tube include the shell of column with column outer peripheral surface, the axial forward end of shell of column be the radially enlarged tube head section, tube head
The shaft shoulder is formed between section and shell of column；
Bridge plug further include: packing element component is set in the outer peripheral surface of shell of column；
Extrusion ring is threadedly connected to the outer peripheral surface of the axial rearward end of shell of column, and extrusion ring can be axially advanced on shell of column
It is self-locking, and packing element component is applied along axial extruding force, effect of the packing element component in the extruding force using the shaft shoulder as position restriction
Under be radially elastically deformable to close to casing realize seal.
7. bridge plug according to claim 6, it is characterised in that:
Packing element component include the preceding tensioner ring group that shell of column periphery is sequentially sleeved at along axial direction, inner cone pad, middle part packing element, rear cone pad with
And rear tensioner ring group；
The preceding tensioner ring group, the rear tensioner ring group form deformable structure by way of opening up joint-cutting respectively, so that its
It can radially be expanded when being squeezed；The middle part packing element structure is to be fabricated from a flexible material, and it is when being squeezed
Deformation radially can occur, so that when packing element component is by along axial extruding force: a) extrusion ring and rear cone
Pad both drive rear tensioner ring radially expand the resultant force of the active force of rear tensioner ring group, b) inner cone pad and afterwards bore pad two
Person drives that middle part packing element is radially expanded, c) both the shaft shoulder and inner cone pad be to preceding expansion to the resultant force of the active force of middle part packing element
The resultant force for opening the active force of ring group drives preceding tensioner ring radially to be expanded.
8. bridge plug according to claim 6, it is characterised in that:
The extrusion ring includes lock tube and lock ring；The lock tube nose threads are matched with central tube periphery, and the lock ring is sheathed on
Between the outer peripheral surface of the shell of column of the inner peripheral surface and central tube at the lock tube rear portion, and the inner peripheral surface of lock ring and shell of column form screw thread and match
The inner peripheral surface formation of conjunction, the outer peripheral surface of lock ring and lock tube is threadedly engaged, and realizes that the screw thread of extrusion ring is squeezed and locked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910326627.9A CN110145270B (en) | 2019-04-23 | 2019-04-23 | Bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910326627.9A CN110145270B (en) | 2019-04-23 | 2019-04-23 | Bridge plug |
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| Publication Number | Publication Date |
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| CN110145270A true CN110145270A (en) | 2019-08-20 |
| CN110145270B CN110145270B (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910326627.9A Active CN110145270B (en) | 2019-04-23 | 2019-04-23 | Bridge plug |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096344A (en) * | 2020-10-28 | 2020-12-18 | 重庆交通大学 | Soluble bridge plug |
| CN112727396A (en) * | 2020-12-30 | 2021-04-30 | 中石化石油工程技术服务有限公司 | Guide expansion type soluble bridge plug |
| CN113847018A (en) * | 2021-09-30 | 2021-12-28 | 于婷婷 | General pilot production tool for packing off earth formation |
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| CN205532468U (en) * | 2016-02-02 | 2016-08-31 | 四机赛瓦石油钻采设备有限公司 | But cable is sat and is sealed recovery type bridging plug |
| CN208605164U (en) * | 2018-07-12 | 2019-03-15 | 重庆双标石油工程技术服务有限公司 | Dissolvable bridge plug |
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| US4711326A (en) * | 1986-06-20 | 1987-12-08 | Hughes Tool Company | Slip gripping mechanism |
| US5467819A (en) * | 1992-12-23 | 1995-11-21 | Tiw Corporation | Orientable retrievable whipstock and method of use |
| US5487427A (en) * | 1994-04-06 | 1996-01-30 | Baker Hughes Incorporated | Slip release mechanism |
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| CN204511367U (en) * | 2015-03-02 | 2015-07-29 | 青岛农业大学 | A kind of two-way anti-channeling slips |
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| CN205225166U (en) * | 2015-12-10 | 2016-05-11 | 中国海洋石油总公司 | Self compensating formula high temperature thermal insulation packer |
| CN205532468U (en) * | 2016-02-02 | 2016-08-31 | 四机赛瓦石油钻采设备有限公司 | But cable is sat and is sealed recovery type bridging plug |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096344A (en) * | 2020-10-28 | 2020-12-18 | 重庆交通大学 | Soluble bridge plug |
| CN112727396A (en) * | 2020-12-30 | 2021-04-30 | 中石化石油工程技术服务有限公司 | Guide expansion type soluble bridge plug |
| CN113847018A (en) * | 2021-09-30 | 2021-12-28 | 于婷婷 | General pilot production tool for packing off earth formation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110145270B (en) | 2021-07-20 |
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Effective date of registration: 20220130 Address after: 100000 22 Chaoyangmen North Street, Chaoyang District, Beijing. Patentee after: SINOPEC Group Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: Sinopec Jingwei Co.,Ltd. Patentee after: Southwest measurement and control company of Sinopec Jingwei Co.,Ltd. Address before: A6 Huixin East st, Chaoyang District, Beijing 100029 Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: Logging branch of Sinopec Southwest Petroleum Engineering Co., Ltd |
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