CN108150130A - Fracturing bridge plug - Google Patents
Fracturing bridge plug Download PDFInfo
- Publication number
- CN108150130A CN108150130A CN201611110876.7A CN201611110876A CN108150130A CN 108150130 A CN108150130 A CN 108150130A CN 201611110876 A CN201611110876 A CN 201611110876A CN 108150130 A CN108150130 A CN 108150130A
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- Prior art keywords
- central tube
- bridge plug
- cylinder
- sleeved
- press
- Prior art date
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- 238000012856 packing Methods 0.000 claims description 51
- 230000000712 assembly Effects 0.000 claims description 23
- 238000000429 assembly Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 8
- 239000002195 soluble material Substances 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 16
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 11
- 238000003825 pressing Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000009671 shengli Substances 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
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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)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses a fracturing bridge plug, and belongs to the technical field of fracturing. The bridge plug comprises a central pipe, a pushing assembly, a rubber cylinder assembly, a slip assembly and a lower joint, wherein the pushing assembly, the rubber cylinder assembly, the slip assembly and the lower joint are sequentially sleeved on the central pipe from top to bottom. The pushing assembly comprises: the outer cylinder is sleeved on the central pipe, the lower end of the outer cylinder is abutted to the rubber cylinder component, and axial blind grooves are formed in the inner side and the outer side of the upper end of the outer cylinder and matched with each other to form a convex ladder; the push cylinder comprises a large-diameter lower cylinder sleeved on the outer side of the upper end of the outer cylinder and a small-diameter upper cylinder sleeved on the upper end of the central tube, and an inner annular step is formed between the small-diameter upper cylinder and the large-diameter lower cylinder; the lock sleeve is sleeved on the central tube and can only move downwards in a single direction along the central tube; the push ring is sleeved on the central tube, the upper end of the push ring is abutted against the inner annular step, and the lower end of the push ring is abutted against the lock sleeve and the convex ladder simultaneously; the shear pin is transversely arranged in the wall of the small-diameter upper barrel and the central tube. The sealing effect and the fixing effect of the fracturing bridge plug are good.
Description
Technical field
The present invention relates to fracturing technique field, more particularly to a kind of press-fracturing bridge plug.
Background technology
Press-fracturing bridge plug is a kind of isolating tool, is usually used in the construction of oil/gas well measures to reform, particularly horizontal well multistage fracturing
Fractured layer position is insulated in measure.Since individual well is more using bridge plug, so, after pressing crack construction, need to remove bridge plug
To restore the normal production of oil/gas well, thus at present for, press-fracturing bridge plug include can bore bridge plug, solvable bridge plug etc..Wherein, may be used
Molten bridge plug employs full soluble material, can dissolve in certain time after the completion of the pressing crack construction operation, after restoring pressure break
Full-bore, ensure the normal production of oil/gas well.
The prior art provides a kind of soluble press-fracturing bridge plug, full soluble material is used to be prepared, including center
Pipe, pushing component, packing element component, slip assemblies, lower contact, wherein, pushing component, packing element component, slip assemblies, lower contact from
It is sleeved on central tube successively under, packing element component is fixed on by shear pin on central tube.During work, pass through tripping in oil
The modes such as pipe push down on pushing component, it is made to cut shear pin packing element component to be pushed to move downward, and make packing element group
Packing element in part is radially expanded to realizes sealing with casing-contact.Meanwhile it realizes and fixes by slips, and then realize envelope
Every operation.
Inventor has found that the prior art has at least the following problems：
Packing element component and casey component can bounce back upon inflation because reaction force floats upwards, cause pressure break bridge in this way
The sealing effect and fixed effect of plug are poor.
Invention content
Technical problem to be solved of the embodiment of the present invention is, provides a kind of sealing effect and fixed effect is preferable
Press-fracturing bridge plug.Specific technical solution is as follows：
A kind of press-fracturing bridge plug including central tube, is from top to bottom sleeved on pushing component, packing element on the central tube successively
Component, slip assemblies and lower contact, the pushing component include：It is sleeved on the central tube and lower end and the packing element component
The outer barrel to offset, the upper end medial and lateral of the outer barrel are both provided with axial blind slot, cooperatively form convex ladder；
Pushing cylinder, including be sleeved on cylinder under the major diameter on the outside of the outer barrel upper end and be sleeved on the central tube upper end it is small
Cylinder on diameter forms annular step on the path under cylinder and the major diameter between cylinder；
Lock tube is sleeved on the central tube, only can carry out one-way movement downwards along the central tube；
Throw-out collar is sleeved on the central tube, and upper end offsets with the annular step, lower end simultaneously with the lock tube
It offsets with the convex ladder；
Shear pin is horizontally installed on the path in the wall of cylinder and the central tube.
Specifically, it preferably, being provided with unidirectional tooth on the inner wall of the lock tube, is set in the external wall of upper portion of the central tube
The teeth being meshed with the unidirectional tooth are equipped with, so that the lock tube moves downward, upward locking.
Specifically, preferably, the packing element component includes：Packing element is sleeved on the central tube, upper end with it is described outer
Cylinder lower end inside offsets, and offsets on the inside of lower end and the slip assemblies upper end；
Upper anti-bulge loop, is closely sleeved in the gap between the packing element upper end and the outer barrel lower end；
Under anti-bulge loop, be closely sleeved in the gap between the packing element lower end and the slip assemblies upper end.
Specifically, preferably, the thickness of the upper anti-bulge loop and lower anti-bulge loop gradually increases from the inside to the outside；
Accordingly, the gap between the packing element upper end and the outer barrel lower end and the packing element lower end and the slips
The width in the gap between component upper end gradually increases from the inside to the outside.
Specifically, preferably, the slip assemblies include：Cone is pushed, is sleeved on the central tube, upper end is simultaneously
It offsets with the lower end of the packing element and the lower anti-bulge loop, acclivitous inclined-plane is provided on lower end outer wall；
Slips ontology, upper end are provided with acclivitous inclined-plane and are offseted with the inclined-plane cooperation with the promotion cone lower end,
And then radially expanded when the promotion cone pushes down on, lower end offsets with the lower contact；
Multiple slip inserts are arranged on the outer wall of the slips ontology；
Guide pad is horizontally installed in the wall for pushing cone, and inner end is indulged with what the central tube lower part was set
It offsets to the bottom of groove.
Specifically, preferably, the slips ontology is along the circumferential direction composed of, and more the sub- ontology of multiple slips
At least one circle groove on the outer wall of a sub- ontology of the slips is set, flexible anchor ear is set in the groove.
Specifically, preferably, multiple slip inserts are scattered at least one circle circumference on the slips ontology；
The material of the slip insert is hard alloy.
Specifically, preferably, the upper end of the central tube is provided with major diameter groove, the lower end of the lower contact is arranged to
The hollow cylinder being adapted with the major diameter groove.
Specifically, preferably, the circular bottom part of the major diameter groove of the upper end of the central tube is provided with the conical surface；
The press-fracturing bridge plug further includes solvable ball, is placed in the major diameter groove and is contacted with the conical surface seal.
Specifically, preferably, the press-fracturing bridge plug is prepared using pressure break with soluble material.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
Press-fracturing bridge plug provided in an embodiment of the present invention by the way that pushing component is set as above, can ensure packing element component and card
Watt component will not have the trend for moving upwards and bouncing back, and so as to keep steadily swelling state, effectively improve the press-fracturing bridge plug
Leakproofness and fixed effect.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the sectional view of press-fracturing bridge plug provided in an embodiment of the present invention.
Reference numeral represents respectively：
1 central tube,
2 pushing components,
201 outer barrels, 202 pushing cylinders, 203 lock tubes, 204 throw-out collars, 205 shear pins,
3 packing element components,
301 packing elements, anti-bulge loop on 302, anti-bulge loop under 303,
4 slip assemblies,
401 promotion cones, 402 slips ontologies, 403 slip inserts, 404 guide pads,
5 lower contacts,
6 solvable balls.
Specific embodiment
Unless otherwise defined, all technical terms used in the embodiment of the present invention are respectively provided with usual with those skilled in the art
The identical meaning understood.To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to this hair
Bright embodiment is described in further detail.
An embodiment of the present invention provides a kind of press-fracturing bridge plug, as shown in Figure 1, which includes central tube 1, from top to bottom
Pushing component 2, packing element component 3, slip assemblies 4 and the lower contact 5 being sleeved on successively on central tube 1.Wherein, pushing component 2 wraps
It includes：Outer barrel 201, pushing cylinder 202, lock tube 203, throw-out collar 204 and shear pin 205.Outer barrel 201 is sleeved on central tube 1 and lower end
It offsets with packing element component 3, the upper end medial and lateral of outer barrel 201 are both provided with axial blind slot, cooperatively form convex ladder；Pushing cylinder 202 includes
Cylinder on cylinder and the path of upper end for being sleeved on central tube 1 is sleeved under the major diameter on the outside of 201 upper end of outer barrel, cylinder and major diameter on path
Annular step is formed between lower cylinder；Lock tube 203 is sleeved on central tube 1, only can carry out one-way movement downwards along central tube 1；
Throw-out collar 204 is sleeved on central tube 1, and upper end offsets with annular step, and lower end offsets simultaneously with lock tube 203 and convex ladder；It cuts
Pin 205 is cut to be horizontally installed on path in the wall of cylinder and central tube 1.
The operation principle of press-fracturing bridge plug provided in an embodiment of the present invention is as follows：
In pressing crack construction operation process, by oil pipe or cable by below the bridge plug to pre-position in casing, so
It suppresses fluid commonly used in the art afterwards or pushing component 2 is pushed to move downward by way of electrically activating, specifically push away
Cylinder 202 moves downward, and shear pin 205 is forced to cut and (cut off the connection between pushing cylinder 202 and central tube 1) at this time, at this time
Pushing cylinder 202 pushes throw-out collar 204 that lock tube 203 is driven to move downward, and at the same time, throw-out collar 204 also pushes outer barrel 201 to move downward.
During pushing component 2 moves downward, packing element component 3 is expanded the inner wall until with casing by the extruding on top outward
It fits closely together, realizes sealing.At the same time, packing element component 3, which moves downward, gives slip assemblies 4 downward power, makes card
Expansion until be fixed on internal surface of sleeve pipe, realizes the fixation of bridge plug outward for watt component 4.Setting for bridge plug is thereby realized, from
And reach the packing to fractured layer position, it then carries out perforation connection stratum, carrying out subsequent fracturing work.Wherein, lead to
Setting lock tube 203 is crossed, can only be moved downward along central tube 1, and can not be moved upwards, achievees the purpose that reverse locking, in this way
It ensures that packing element component 3 and slip assemblies 4 will not have the trend for moving upwards and bouncing back, them is made to be always maintained at distending shape
State improves the leakproofness and fixed effect of the press-fracturing bridge plug.As it can be seen that press-fracturing bridge plug provided in an embodiment of the present invention, by such as
Upper setting pushing component 2 can ensure that packing element component 3 and slip assemblies 4 will not have the trend for moving upwards and bouncing back, so as to
Steadily swelling state is kept, effectively improves the leakproofness and fixed effect of the press-fracturing bridge plug.
It should be noted that by the sequentially connection with one heart from top to bottom of cylinder under the cylinder on the path of pushing cylinder 202 and major diameter, by
Be respectively less than the outer diameter and internal diameter of cylinder under major diameter in the outer diameter and internal diameter of cylinder on path, on such path under cylinder and major diameter cylinder connection
Place will be correspondingly formed above-mentioned annular step and outer ring step.The upper end inner side and outer side of outer barrel 201 is both provided with centainly
The axial blind slot of length cooperatively forms the convex annular ladder of thickness reduction between two such axial direction blind slot.Outside convex annular ladder
Wall is connect with cylinder inner wall under the major diameter of pushing cylinder 202, and preferably the outer wall of convex annular ladder connects with cylinder screw thread under the major diameter of pushing cylinder 202
It connects.Throw-out collar 204 is arranged in the axial blind slot of 201 inside of outer barrel, and upper end offsets with the annular step of pushing cylinder 202 and connect, under
End sequentially offsets and connect with the top of lock tube 203 and convex ladder from the inside to the outside, and such throw-out collar 4 can be moved downward in pushing cylinder 202
When move downward together.Multiple through-holes are set on the path of pushing cylinder 202 on the wall of cylinder, and at the center opposite with the through-hole
Corresponding multiple counterbores are set on the outer wall of pipe 1, by the way that shear pin 205 is horizontally through through-hole and end is made to be placed on being somebody's turn to do
Inside the opposite counterbore of through-hole, the connection between pushing cylinder 202 and central tube 1 is formed this makes it possible to make shear pin 205.When cutting
When cutting pin 205 and being cut, connection between the two is cut off, such pushing cylinder 202 can move downward.
The embodiment of the present invention reversely keeps out effect by using lock tube 203 to provide packing element component 3, slip assemblies 4, i.e.,
Them is allowed to move downward and prevents them from moving upwards, so that it is guaranteed that leakproofness and fixed effect.Specifically, lock tube 203
Unidirectional tooth is provided on inner wall, the teeth being meshed with unidirectional tooth are provided in the external wall of upper portion of central tube 1, so that lock tube 203
It moves downward, upward locking, by the way that lock tube 203 is configured similarly to ratchet, the unidirectional tooth of such lock tube 203 is in
It can be moved downward under the cooperation of teeth on heart pipe 1, and when lock tube 203 moves upwards, the teeth on central tube 1 will be to it
On unidirectional tooth cause to stop, so as to which lock tube 203 be made to reach the function of counteresteer.It is understood that lock tube 203 is similar to
Tubular, the setting of unidirectional tooth on an an inner wall from top to bottom circle then circle, structure are similar to helicitic texture.As excellent
Choosing, for the ease of the installation and removal of lock tube 203, a longitudinal slot is cut out in the side wall of lock tube 203 from top to bottom.
In embodiments of the present invention, as shown in Figure 1, packing element component 3 includes：Packing element 301, upper anti-bulge loop 302 and lower anti-
Bulge loop 303, wherein, packing element 301 is sleeved on central tube 1, and upper end offsets with 201 lower end inside of outer barrel, lower end and slip assemblies 4
It offsets on the inside of upper end；Upper anti-bulge loop 302, is closely sleeved in the gap between 201 lower end of 301 upper end of packing element and outer barrel；It is lower anti-
Bulge loop 303 is closely sleeved in the gap between 4 upper end of 301 lower end of packing element and slip assemblies.Pass through the upper anti-bulge loop 302 of setting
With lower anti-bulge loop 303, packing element 301 can be squeezed in upper and lower both direction, it is ensured that it will not be flowed, and make itself and set
Inside pipe wall is in close contact, and improves the leakproofness of the pressure break rubber plug.Wherein, to those skilled in the art, packing element 301 is this
Field is common, and with certain elasticity, can radially be expanded when being squeezed, the embodiment of the present invention is herein simultaneously
It is not limited specifically.In order to ensure squeezing effect, the material of upper anti-bulge loop 302 and lower anti-bulge loop 303 preferably uses ability
The common soluble material in domain, after a period of time is set, dissolving can be achieved in upper anti-bulge loop 302 and lower anti-bulge loop 303.
Preferably, the thickness of upper anti-bulge loop 302 and lower anti-bulge loop 303 gradually increases from the inside to the outside；Accordingly, packing element
The width in the gap between 4 upper end of gap and 302 lower end of packing element and slip assemblies between 201 lower end of 301 upper ends and outer barrel
Gradually increase from the inside to the outside.The trapezoidal structure of vertical tangent plane of i.e. upper anti-bulge loop 302 and lower anti-bulge loop 303, specifically, in packing element
301 top and bottom set symmetrical inclined-plane, accordingly, are also configured to symmetrically in the upper end of 201 lower end of outer barrel and slip assemblies 4
Inclined-plane, make in this way in the gap that anti-bulge loop 302 is placed on just between 201 lower end of 301 upper end of packing element and outer barrel, make lower anti-
Bulge loop 303 is placed on just in the gap between 4 upper end of 301 lower end of packing element and slip assemblies, once has stream in packing element 301 in this way
During dynamic trend, upper anti-bulge loop 302 and lower anti-bulge loop 303 apply reversely it by the contact between the inclined-plane that is in contact with it
Power, and then achieve the purpose that squeeze packing element 301 up and down.
As shown in Figure 1, which includes：It pushes cone 401, slips ontology 402, multiple slip inserts 403 and leads
To block 404, wherein cone 401 is pushed to be sleeved on central tube 1, upper end while the lower end phase with packing element 301 and lower anti-bulge loop 303
It supports, acclivitous inclined-plane is provided on lower end outer wall；402 upper end of slips ontology be provided with acclivitous inclined-plane with promotion
The inclined-plane cooperation of 401 lower end of cone offsets, and then is radially expanded when cone 401 is pushed to push down on, and lower end is under
Connector 5 offsets；Multiple slip inserts 403 are arranged on the outer wall of slips ontology 402；Guide pad 404 is horizontally installed on promotion cone
In 401 wall, and the bottom of longitudinal fluting that inner end is set with 1 lower part of central tube offsets.Wherein, in the lower part of central tube 1
Longitudinal fluting is provided on the outer wall of corresponding position, using the directive slide track as guide pad 404, cone 401 is pushed by setting
With guide pad 404, to ensure to push cone 401 that can only move up and down and the circumferential movement that cannot issue licence, cone can pushed in this way
401 lower end moves downward when forcing the slips ontology 402 to expand outwardly, and slips ontology 402 will not be with pushing cone 401 that mistake occur
Position, and then ensure good to set effect.
It is understood that by the way that the lower end inclined-plane of promotion cone 401 is made to coordinate phase with the upper end inclined-plane of slips ontology 402
It supports, when cone 401 is pushed to move downward, it can force slips ontology 402 to expand outwardly, and then be fixed on slip insert 403
On internal surface of sleeve pipe.Specifically, for the ease of assembly and disassembly, slips ontology 402 is by the sub- ontology of multiple slips (cone is blocky) along circle
Circumferential direction is composed, and at least one circle groove is set on the outer wall of the sub- ontology of multiple slips, flexible armful of setting in groove
Hoop, by the way that elastic anchor ear is set to can guarantee that the sub- ontology of multiple slips is combined into cylindric slips ontology 402, and in slips sheet
In stable configuration state when body 402 expands outwardly.
Specifically, counterbore is set on slips ontology 402, slip insert 403 is fastened on this in an interference fit sinks
In hole.Slip assemblies 4 are arranged to slips ontology 402 and slip insert 403 is separated by making, without being designed to integrated knot
The structure of structure, the so individually designed slip insert 403 of energy makes it have sharp end convenient for being firmly secured at internal surface of sleeve pipe
On, and the material of slip insert 403 can also be defined to high hard material, in this way under the premise of cost is ensured, ensure simultaneously
The fixed effect of bridge plug.Preferably, multiple slip inserts 403 are scattered at least one circle circumference on slips ontology 402, such as
2 circles, 3 circles etc., and the material of slip insert 403 is hard alloy, so as to achieve the purpose that improve fixed effect.Further, block
The material of watt tooth 403 is not only hard alloy, and the cemented carbide material is preferably soluble in the given time.
Since multiple press-fracturing bridge plugs will be set in each individual well, after pressing crack construction, bridge plug is removed to restore oil/gas well
During normal production, in order to improve construction efficiency, major diameter groove, the lower end setting of lower contact 5 are provided in the upper end of central tube 1
Into the hollow cylinder being adapted with major diameter groove, in this way when boring plug removing, the lower contact 5 of a upper press-fracturing bridge plug will be extend into
In the major diameter groove of 1 upper end of central tube, multiple bridge plugs, which sequentially combine, easily disposably to be removed.
When carrying out pressing crack construction, in order to ensure the leakproofness of the bridge plug, it is necessary to assure the leakproofness of central tube 1, in order to
Work is removed convenient for subsequent bridge plug, the embodiment of the present invention is provided in the circular bottom part of the major diameter groove of the upper end of central tube 1
The conical surface, press-fracturing bridge plug further include solvable ball 6, and solvable ball 6 is placed in major diameter groove and is contacted with conical surface seal, to block center
The inner cavity of pipe 1.And terminate after a certain period of time in pressing crack construction, which can also dissolve removing, so as to restore normal oil
Gas produces.
Preferably, press-fracturing bridge plug provided in an embodiment of the present invention is prepared using pressure break with soluble material, exist in this way
The bridge plug can all dissolve in certain time after pressing crack construction, remove brill plug construction from, reduce construction cost, shorten oil gas
Well asks the production time.The pressure break soluble material is common, such as Shengli Oil Field branch company to those skilled in the art
The Lv Fanglei of petroleum works Institute for Research and Technology exists《Technical research》(the 6th phase in 2015) discloses domestic and international pressure break with novel solvable
Composite material underground tool, also, occurred currently on the market it is many using the soluble material be prepared can dissolve
Bridge plug, for example, solvable bridge plugs of Sanmon of Yantai San Men mechanical equipments Co., Ltd sale etc., the embodiment of the present invention is herein
It does not repeat excessively.
The foregoing is merely presently preferred embodiments of the present invention, the protection domain being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (10)
1. a kind of press-fracturing bridge plug, including central tube (1), the pushing component being from top to bottom sleeved on successively on the central tube (1)
(2), packing element component (3), slip assemblies (4) and lower contact (5), which is characterized in that the pushing component (2) includes：It is sleeved on
The outer barrel (201) that on the central tube (1) and lower end and the packing element component (3) offset, in the upper end of the outer barrel (201),
Outside is both provided with axial blind slot, cooperatively forms convex ladder；
Pushing cylinder (202), including being sleeved on cylinder under the major diameter on the outside of the outer barrel (201) upper end and being sleeved on the central tube (1)
Upper end path on cylinder, form annular step between cylinder under cylinder and the major diameter on the path；
Lock tube (203) is sleeved on the central tube (1), only can carry out one-way movement downwards along the central tube (1)；
Throw-out collar (204) is sleeved on the central tube (1), and upper end offsets with the annular step, lower end simultaneously with it is described
Lock tube (203) and the convex ladder offset；
Shear pin (205) is horizontally installed on the path in the wall of cylinder and the central tube (1).
2. press-fracturing bridge plug according to claim 1, which is characterized in that be provided on the inner wall of the lock tube (203) unidirectional
Tooth is provided with the teeth being meshed with the unidirectional tooth in the external wall of upper portion of the central tube (1), so that the lock tube (203)
It moves downward, upward locking.
3. press-fracturing bridge plug according to claim 1, which is characterized in that the packing element component (3) includes：Packing element (301), set
On the central tube (1), upper end offsets with the outer barrel (201) lower end inside, lower end and the slip assemblies (4) upper end
Inside offsets；
Upper anti-bulge loop (302), is closely sleeved in the gap between the packing element (301) upper end and the outer barrel (201) lower end；
Under anti-bulge loop (303), be closely sleeved on the gap between the packing element (301) lower end and the slip assemblies (4) upper end
In.
4. press-fracturing bridge plug according to claim 3, which is characterized in that the upper anti-bulge loop (302) and lower anti-bulge loop (303)
Thickness gradually increase from the inside to the outside；
Accordingly, under the gap between packing element (301) upper end and the outer barrel (201) lower end and the packing element (301)
The width in the gap between end and the slip assemblies (4) upper end gradually increases from the inside to the outside.
5. press-fracturing bridge plug according to claim 3, which is characterized in that the slip assemblies (4) include：Push cone
(401), be sleeved on the central tube (1), upper end simultaneously with the packing element (301) and the lower end of the lower anti-bulge loop (303)
It offsets, acclivitous inclined-plane is provided on lower end outer wall；
Slips ontology (402), upper end are provided with acclivitous inclined-plane to coordinate with the inclined-plane for pushing cone (401) lower end
It offsets, and then is radially expanded when the promotion cone (401) pushes down on, lower end offsets with the lower contact (5)；
Multiple slip inserts (403) are arranged on the outer wall of the slips ontology (402)；
Guide pad (404) is horizontally installed in the wall of the promotion cone (401), and inner end and the central tube (1) lower part
The bottom of the longitudinal fluting of setting offsets.
6. press-fracturing bridge plug according to claim 5, which is characterized in that the slips ontology (402) is sub originally by multiple slips
Body is along the circumferential direction composed, and at least one circle groove, the groove are set on the outer wall of multiple sub- ontologies of the slips
The interior flexible anchor ear of setting.
7. press-fracturing bridge plug according to claim 5, which is characterized in that multiple slip inserts (403) are in the slips sheet
At least one circle circumference is scattered on body (402)；
The material of the slip insert is hard alloy.
8. press-fracturing bridge plug according to claim 1, which is characterized in that it is recessed that the upper end of the central tube (1) is provided with major diameter
Slot, the lower end of the lower contact (5) are arranged to the hollow cylinder being adapted with the major diameter groove.
9. press-fracturing bridge plug according to claim 8, which is characterized in that the major diameter of the upper end of the central tube (1) is recessed
The circular bottom part of slot is provided with the conical surface；
The press-fracturing bridge plug further includes solvable ball (6), is placed in the major diameter groove and is contacted with the conical surface seal.
10. press-fracturing bridge plug according to claim 1, which is characterized in that the press-fracturing bridge plug uses pressure break soluble material
It is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611110876.7A CN108150130A (en) | 2016-12-06 | 2016-12-06 | Fracturing bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611110876.7A CN108150130A (en) | 2016-12-06 | 2016-12-06 | Fracturing bridge plug |
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| CN108150130A true CN108150130A (en) | 2018-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611110876.7A Pending CN108150130A (en) | 2016-12-06 | 2016-12-06 | Fracturing bridge plug |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025898A (en) * | 2018-10-11 | 2018-12-18 | 天津市玛特瑞科技有限公司 | A kind of solvable bridge plug |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US20160138363A1 (en) * | 2013-11-22 | 2016-05-19 | Target Completions, LLC | IPacker Bridge Plug with Slips |
| CN205503089U (en) * | 2016-02-29 | 2016-08-24 | 杰瑞能源服务有限公司 | Big latus rectum bridging plug |
| CN105971557A (en) * | 2016-07-08 | 2016-09-28 | 四川省贝特石油技术有限公司 | Completely-dissolvable bridge plug |
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| CN2674080Y (en) * | 2004-01-18 | 2005-01-26 | 中国石化胜利油田有限公司井下作业公司 | High pressure recovery bridge plug |
| US20160138363A1 (en) * | 2013-11-22 | 2016-05-19 | Target Completions, LLC | IPacker Bridge Plug with Slips |
| CN204492751U (en) * | 2015-02-16 | 2015-07-22 | 中国石油集团渤海钻探工程有限公司 | With the bridging plug instrument of solvable ball |
| CN204782918U (en) * | 2015-07-07 | 2015-11-18 | 吉林市旭峰激光科技有限责任公司 | Dissolubility bridging plug based on rubber sleeve |
| CN205503089U (en) * | 2016-02-29 | 2016-08-24 | 杰瑞能源服务有限公司 | Big latus rectum bridging plug |
| CN105971557A (en) * | 2016-07-08 | 2016-09-28 | 四川省贝特石油技术有限公司 | Completely-dissolvable bridge plug |
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| CN109025898A (en) * | 2018-10-11 | 2018-12-18 | 天津市玛特瑞科技有限公司 | A kind of solvable bridge plug |
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