CN109488251A - A kind of preset dissolving medium mechanism and application method - Google Patents
A kind of preset dissolving medium mechanism and application method Download PDFInfo
- Publication number
- CN109488251A CN109488251A CN201811382247.9A CN201811382247A CN109488251A CN 109488251 A CN109488251 A CN 109488251A CN 201811382247 A CN201811382247 A CN 201811382247A CN 109488251 A CN109488251 A CN 109488251A
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- ontology
- central tube
- dissolving medium
- preset
- medium mechanism
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- 230000007246 mechanism Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000002195 soluble material Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 230000008520 organization Effects 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 abstract description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 8
- 239000002585 base Substances 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009466 transformation Effects 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
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- 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)
Abstract
The present invention provides a kind of preset dissolving medium mechanism and application methods, including central tube, ontology and shear pin and sealing ring on ontology.The central tube is up-small and down-big internal diameter reducer pipe, is equipped with ball seat in central tube.Ontology is that two sections of outer diameters are equal, and the ring pipe that internal diameter does not wait, bodies top is equipped with sealing screw, and upper end is symmetrically arranged with shear pin and is connected with central tube, and body upper part and lower part are respectively equipped with sealing ring, and the shear pin position is higher than central tube ball seat.This preset dissolving medium mechanism provided by the invention, for dissolvable isolating tool (such as solvable bridge plug), it is provided with device for opening, it can be while not influencing ball seat normal work, extend the isolating tool working time, after ontology is opened, built-in dissolving medium release, the fast automatic dissolution for realizing solvable isolating tool reaches the control to solvable isolating tool dissolution time.
Description
Technical field
The invention belongs to petroleum-gas fiedl reservoir multi-section multi-layer renovation technique fields, and in particular to a kind of preset dissolving medium mechanism
And application method.
Background technique
The multi-purpose fast brill bridge plug staged fracturing technique of fine and close oil-gas reservoir horizontal well multilayer multistage reservoir reconstruction, the technique have bridge
Plug packing is reliable, cloth seam is accurate, single hop evaluation is accurate, staged fracturing series is unrestricted, it can be achieved that the advantages such as huge discharge pressure break.
But the later period still needs to bore except bridge plug in well, realizes casing full-bore, keeps wellbore integrity.
In recent years, on the basis of boring bridge plug staged fracturing technique fastly, solvable bridge plug is derived, exempts the fast bridge plug reservoir that bores and changes
After making, bores and bore bridge plug operation except fast, cut down the brill plug risk in pressure break, shortened well construction period, reduce operating cost.
Solvable bridge plug should meet pressure-bearing demand during reservoir reconstruction, also need quickly to dissolve after meeting pressure, restore pit shaft
Demand.Currently, mainly use can be dissolved in the magnesium alloy of chloride (sodium chloride, potassium chloride) to solvable bridge plug, because its is molten
The specific condition of solution, it usually needs pump note chloride solution from well head or establish dissolution item using the chloride solution in reservoir
Part dissolves solvable bridge plug.Note chloride solution is pumped from well head, then needs to change process flow, this may will affect fracturing fluid
Performance, while solvable bridge plug contacts that the chloride solution time is longer, and there are certain risks to reservoir reconstruction operation in well.Such as
Using the chloride solution in reservoir, in one side reservoir there is uncertain, another aspect dissolution time in the content of chloride
It is longer, influence construction operation efficiency.
Summary of the invention
The present invention is in order to overcome drawbacks described above existing in the prior art, and the present invention provides a kind of preset dissolving mediums
Mechanism and application method realize fixed point, timing the purpose is to open dissolved matter release channel after pitching in reservoir reconstruction
Dissolution.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of preset dissolving medium mechanism, includes at least central tube, and the center inside pipe wall has chuck, central tube upper port pipe
It is ball seat at wall, is socketed with the ontology coaxial with central tube by shear pin in central tube, forms annular between ontology and central tube
Cavity, ontology upper end side wall are matched and are slidably connected with the center inside pipe wall internal diameter above chuck, ontology bottom side of the wall and chuck
Internal diameter is matched and is slidably connected, and body upper surface is provided with the through-hole for being through to annular housing, and through-hole upper end is provided with sealing element.
The central tube is the up-small and down-big reducer pipe of internal diameter, the ontology by different wall thickness three sections of tools formed
There is the tubular structure of hollow cavity, the upper section outer diameter of ontology is matched with central tube upper-end inner diameter, the lower section outer diameter and chuck of ontology
The matching of side wall internal diameter, the lower segment length of ontology are identical as the thickness of chuck；It is opened respectively on the upper section and lower section lateral wall of ontology
There is annular groove；The upper end end face of ontology is higher than center pipe port.
It is provided with 2-5 annular groove on the upper section lateral wall of the ontology, 1-3 annular groove is provided on lower section lateral wall；
Described symmetrically opens up 2-6 through through-hole.
It is provided with 3 annular grooves on the upper section lateral wall of the ontology, 2 annular grooves are provided on lower section lateral wall；It is described
Symmetrically open up 4 through through-hole.
The shear pin is symmetrical arranged.
Space is sealed by sealing ring between the central tube and ontology.
The upper surface of the ontology is higher than ball seat upper surface at least 10mm.
The sealing element is sealing screw.
The ontology is made of soluble material.
A kind of application method of preset dissolving medium mechanism is dissolved by putting into through through-hole to preset dissolving medium mechanism
Medium covers tightly the sealing element of through-hole upper end；Pressure break ball is put into preset dissolving medium mechanism, since ontology top is higher than central tube
The ball seat of upper end, therefore pressure break ball, first with body contacts, in fracturing process, under the pressure effect of pressure break ball, ontology is in
Heart pipe relatively moves, to cut fixing piece, ontology is moved down along central tube, until ontology upper section is stuck at chuck；
Pressure break ball continues to move down, until being seated on central tube ball seat, dissolving medium fluid channel within the organization is sealed；In meanwhile
Ring packing space is opened between heart pipe and ontology, and the release of ring packing space interior dissolving medium connects with solvable isolating tool
Touching.
Beneficial effects of the present invention:
1, this preset dissolving medium mechanism provided by the invention is provided with the space of internal preset dissolving medium, realizes can
Preset dissolving medium in isolating tool is dissolved, realizes periodically, pinpoint and precisely launch dissolving medium, it is molten to eliminate dissolvable isolating tool
Solve the uncertainty of time；
2, this preset dissolving medium mechanism provided by the invention, can be used soluble material, can be real under the specified conditions of underground
Now automatic degradation, reduces the retention in well.
3, this preset dissolving medium mechanism provided by the invention can carry out acid and alkali resistance processing in dissolving medium contact surface,
Improve the dissolved efficiency that can dissolve isolating tool.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is structure original state diagrammatic cross-section of the invention；
Fig. 2 is arrangement works state diagrammatic cross-section of the invention；
Fig. 3 is structure top view of the invention；
Fig. 4 is the diagrammatic cross-section of Fig. 3.
In figure: 1- central tube；2- ontology；3- sealing element；4- fixing piece；5- chuck；6- ball seat；7- through-hole；8- annular chamber
Body.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment one:
A kind of preset dissolving medium mechanism as shown in Figs 1-4 includes at least central tube 1, it is characterised in that: the central tube 1
Inner wall has chuck 5, is ball seat 6 at 1 upper port tube wall of central tube, is socketed in central tube 1 by shear pin 4 same with central tube 1
The ontology 2 of axis, forms annular housing 8 between ontology 2 and central tube 1, in the central tube 1 of 2 upper end side wall of ontology and the top of chuck 5
Wall internal diameter is matched and is slidably connected, and 2 bottom side of the wall of ontology is matched and is slidably connected with 5 internal diameter of chuck, and 2 upper surface of ontology, which is provided with, to be passed through
It wears to the through-hole 7 of annular housing 8,7 upper end of through-hole is provided with sealing element 3.
In actual use, it by putting into dissolving medium to preset dissolving medium mechanism through through-hole 7, covers tightly on through-hole 7
The sealing element 3 at end.Pressure break ball is put into preset dissolving medium mechanism, since 2 top of ontology is higher than the ball seat 6 of central tube upper end,
Therefore pressure break ball is contacted with ontology 2 first, and in fracturing process, under the pressure effect of pressure break ball, ontology 2 and central tube 1 occur
Relative movement, to cut fixing piece 4, ontology is moved down along central tube, until 2 upper section of ontology is stuck at chuck 5.Pressure break ball
Continue to move down, until being seated on central tube ball seat 6, dissolving medium fluid channel within the organization is sealed.Meanwhile central tube with
Ring packing space is opened between ontology, and the release of ring packing space interior dissolving medium is contacted with solvable isolating tool.
This preset dissolving medium mechanism provided by the invention is provided with the space of internal preset dissolving medium, realizes
It can dissolve preset dissolving medium in isolating tool, realize that dissolving medium is precisely launched in timing, fixed point, eliminate and can dissolve isolating tool
The uncertainty of dissolution time；This preset dissolving medium mechanism provided by the invention can carry out resistance in dissolving medium contact surface
Acid, alkali process improve the dissolved efficiency that can dissolve isolating tool.Dissolving medium is the prior art, belongs to general knowledge known in this field,
Here it does not just elaborate.
Embodiment two:
A kind of preset dissolving medium mechanism as shown in Figs 1-4, with embodiment one the difference is that: the central tube 1 is
The up-small and down-big reducer pipe of internal diameter, the tubular structure with hollow cavity that the ontology 2 is formed by three sections of different wall thickness,
The upper section outer diameter of ontology 2 is matched with 1 upper-end inner diameter of central tube, and the lower section outer diameter of ontology 2 is matched with 5 side wall internal diameter of chuck, ontology 2
Lower segment length it is identical as the thickness of chuck 5；Annular groove is had on the upper section and lower section lateral wall of ontology 2；Ontology 2
Upper end end face is higher than 1 port of central tube.
It preferably is provided with 2-5 annular groove on the upper section lateral wall of the ontology 2, is provided with 1-3 on lower section lateral wall
Annular groove；Described symmetrically opens up 2-6 through through-hole 7.
3 annular grooves preferably are provided on the upper section lateral wall of the ontology 2,2 rings are provided on lower section lateral wall
Shape slot；Described symmetrically opens up 4 through through-hole 7.
In actual use, the annular groove being provided on upper and lower section of lateral wall of the upper section lateral wall of ontology 2, can will seal
Circle is mounted in slot, so that the installation of sealing ring is more firm, and ontology 2 and the sealing effect of central tube 1 are more preferable；Described passes through
Reach through hole 7 symmetrically opens up, so that the dispensing of dissolving medium is more uniform, enhances the effect of dissolution.
Embodiment three:
A kind of preset dissolving medium mechanism as shown in Figs 1-4, with embodiment one the difference is that: the shear pin 4 is symmetrical
Setting.
The upper surface of the ontology 2 is higher than 6 upper surface of ball seat at least 10mm.
Preferably the sealing element 3 is sealing screw.
Preferably the ontology 2 is made of soluble material.
Preferably the ontology 2 uses magnesium base alloy.
In actual use, shear pin 4 is symmetrical arranged, and has not only met fixed requirement but also can be when needing to cut fixing piece, fastly
Speed is safe to cut fixing piece, falls in ontology 2 smoothly in chuck 5.In actual use, shear pin according to actual needs,
Using a certain number of metal shear pins, should guarantee fixed stabilization, guarantee again if necessary being capable of smoothly safe cutting
It is advisable.
The upper surface of ontology 2 is higher than 6 upper surface of ball seat at least 10mm, can guarantee that pressure break ball smoothly realizes pressure break function
Energy；Sealing element 3 is sealing screw, can more conveniently complete the function of opening and seal.Ontology 2 uses soluble material system
At, under conditions of meeting intensity, guarantee degradable requirement, realizes under the specified conditions of underground and degrade automatically, reduction tool
Retention in well.Preferably ontology 2 uses magnesium base alloy；Magnesium base alloy has bearing capacity high, is reliably completed in tool
Passage plugging, and sealed reliable, in chloride solution, can dissolve isolating tool (solvable bridge plug) can be completely molten with the short period
Solution, can speed up dissolution with acid mediums such as hydrochloric acid.
In conclusion preset dissolving medium mechanism design provided by the invention has the sealing annular space of preset dissolving medium
Mechanism can guarantee timing, the fixed point release of dissolving medium.Main component, which uses, can drop dissolved material, when reaching certain well
It when cylinder condition, can degrade over time, reduce remaining time of the tool in well.The preset dissolving medium mechanism has bearing capacity
It is high, be reliably completed the closure of tool internal channel, there is sealed reliable, the characteristics of dissolving medium discharges automatically, can after launching pressure break ball
For meeting the rapidly-soluble need of tool after pressure break based on can dissolve the transformation of isolating tool (such as solvable bridge plug) reservoir multilayer multistage
It asks.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.This
The well-known components and common structure or conventional means of component and the structure category industry that embodiment does not describe in detail, it is different here
One narration.
Technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
Claims (10)
1. a kind of preset dissolving medium mechanism includes at least central tube (1), it is characterised in that: central tube (1) inner wall has
Chuck (5) is ball seat (6) at central tube (1) upper port tube wall, is socketed in central tube (1) by shear pin (4) and central tube
(1) coaxial ontology (2) form annular housing (8) between ontology (2) and central tube (1), ontology (2) upper end side wall and chuck
(5) central tube (1) the inner wall internal diameter above is matched and is slidably connected, and ontology (2) bottom side of the wall is matched and slided with chuck (5) internal diameter
Dynamic connection, ontology (2) upper surface are provided with the through-hole (7) for being through to annular housing (8), and through-hole (7) upper end is provided with sealing element
(3).
2. a kind of preset dissolving medium mechanism as described in claim 1, it is characterised in that: the central tube (1) is internal diameter
Up-small and down-big reducer pipe, the tubular structure with hollow cavity that the ontology (2) is formed by three sections of different wall thickness, this
The upper section outer diameter of body (2) is matched with central tube (1) upper-end inner diameter, the lower section outer diameter and chuck (5) side wall internal diameter of ontology (2)
Match, the lower segment length of ontology (2) is identical as the thickness of chuck (5)；It is had on the upper section and lower section lateral wall of ontology (2)
Annular groove；The upper end end face of ontology (2) is higher than central tube (1) port.
3. a kind of preset dissolving medium mechanism as described in claim 1, it is characterised in that: outside the upper section of the ontology (2)
It is provided with 2-5 annular groove on side wall, 1-3 annular groove is provided on lower section lateral wall；Described symmetrically opens up 2- through through-hole (7)
6.
4. a kind of preset dissolving medium mechanism as claimed in claim 3, it is characterised in that: outside the upper section of the ontology (2)
It is provided with 3 annular grooves on side wall, 2 annular grooves are provided on lower section lateral wall；Described symmetrically opens up 4 through through-hole (7).
5. a kind of preset dissolving medium mechanism according to claim 1, it is characterised in that: the shear pin (4) is symmetrically set
It sets.
6. a kind of preset dissolving medium mechanism according to claim 1, it is characterised in that: the central tube (1) and sheet
Space is sealed by sealing ring between body (2).
7. a kind of preset dissolving medium mechanism according to claim 1, it is characterised in that: the upper end of the ontology (2)
Face is higher than ball seat (6) upper surface at least 10mm.
8. a kind of preset dissolving medium mechanism according to claim 1, it is characterised in that: the sealing element (3) is close
Seal screw.
9. a kind of preset dissolving medium mechanism according to any one of claims 1-4, it is characterised in that: the ontology
(2) it is made of soluble material.
10. a kind of application method of preset dissolving medium mechanism, it is characterized in that: by running through through-hole to preset dissolving medium mechanism
Dissolving medium is put into, the sealing element of through-hole upper end is covered tightly；Pressure break ball is put into preset dissolving medium mechanism, due to ontology top height
Ball seat in central tube upper end, thus pressure break ball first with body contacts, in fracturing process, under the pressure effect of pressure break ball,
Ontology is relatively moved with central tube, to cut fixing piece, ontology is moved down along central tube, until ontology upper section is stuck in
At chuck；Pressure break ball continues to move down, until being seated on central tube ball seat, dissolving medium fluid channel within the organization is sealed；
Meanwhile ring packing space is opened between central tube and ontology, ring packing space interior dissolving medium release, with solvable packing
Tool contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811382247.9A CN109488251B (en) | 2018-11-20 | 2018-11-20 | Mechanism for presetting dissolution medium and use method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811382247.9A CN109488251B (en) | 2018-11-20 | 2018-11-20 | Mechanism for presetting dissolution medium and use method |
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| Publication Number | Publication Date |
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| CN109488251A true CN109488251A (en) | 2019-03-19 |
| CN109488251B CN109488251B (en) | 2024-03-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109899028A (en) * | 2019-04-26 | 2019-06-18 | 天津市玛特瑞科技有限公司 | A kind of solvable bridge plug |
| CN110439522A (en) * | 2019-08-16 | 2019-11-12 | 中石化石油工程技术服务有限公司 | The controllable corrosion opening device in first section pressure break channel and pressure break segmentation operation construction technology |
| CN110513075A (en) * | 2019-08-16 | 2019-11-29 | 中国石油集团长城钻探工程有限公司 | A kind of solvable bridge plug and accelerate bridge plug dissolution can dissolving device |
| CN111236879A (en) * | 2020-01-19 | 2020-06-05 | 中国石油天然气股份有限公司 | Soluble tool packing and unpacking method |
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