CN109519146A - A kind of solvable bridge plug of small size - Google Patents
A kind of solvable bridge plug of small size Download PDFInfo
- Publication number
- CN109519146A CN109519146A CN201811608934.8A CN201811608934A CN109519146A CN 109519146 A CN109519146 A CN 109519146A CN 201811608934 A CN201811608934 A CN 201811608934A CN 109519146 A CN109519146 A CN 109519146A
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- Prior art keywords
- ring
- bridge plug
- central tube
- slips
- solvable
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- 238000012856 packing Methods 0.000 claims abstract description 45
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 238000010008 shearing Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 abstract description 21
- 230000000712 assembly Effects 0.000 abstract description 8
- 238000000429 assembly Methods 0.000 abstract description 8
- 230000033001 locomotion Effects 0.000 abstract description 7
- 238000005086 pumping Methods 0.000 abstract description 3
- 210000000707 wrist Anatomy 0.000 description 24
- 238000004090 dissolution Methods 0.000 description 20
- 238000010276 construction Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000000956 alloy Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000002028 premature Effects 0.000 description 5
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000003721 gunpowder Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000009938 salting Methods 0.000 description 2
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- 230000008719 thickening Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001572175 Gaza Species 0.000 description 1
- 229910001051 Magnalium Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
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Classifications
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- 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
-
- 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
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
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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)
- Pipe Accessories (AREA)
Abstract
The present invention relates to a kind of solvable bridge plug of small size, including central tube and it is arranged with central tube upper end and the wedging ring for compressing packing element；Limit C-shaped ring is accompanied between wedging ring and central tube；It is fixed between wedging ring and the limit C-shaped ring by screw thread；It is continuously raised that compression direction of travel on the lateral wall of central tube along compression assembly is provided with shape of threads；The inner wall of limit C-shaped ring is provided with the continuous groove of shape of threads being meshed with the described continuous protrusion of shape of threads.Compared to traditional dual-grip bridge plug, the structure that wedging ring is matched with limit C-shaped ring does not need the relative motion as existing slip assemblies through two components and generates expansion to realize fixation, is greatly reduced and sets stroke, allows to set by cable pumping；Simultaneously as reduce a slip assemblies, the usable floor area on central tube has been saved, packing element is allowed to carry out growth design, to ensure that the expansion amplitude of packing element and increase with expansion amplitude and what is increased set ability.
Description
Technical field
The present invention relates to solvable bridge plug fields, and in particular to a kind of solvable bridge plug of small size.
Background technique
Solvable bridge plug is a kind of novel shale gas pressure break layer and section transformation tool, using in corresponding salinity liquid
The novel magnesium-aluminium alloy material that can be dissolved in body, so that it can be over time and by well liquid institute after completing to set
Dissolution reduces later period salvaging process, avoids the blocking that well liquid returns row pipeline, improve the row's of returning efficiency of well liquid.But magnesium
Aluminium alloy is lower compared with the hardness of other metal materials, has very big limitation to the bearing capacity of solvable bridge plug, and therefore, solvable bridge plug is held
The structure of laminate section is the emphasis for promoting solvable bridge plug bearing capacity.
In addition to this, with deepening continuously at present to shale gas exploitation, the horizontal segment of shale gas well constantly lengthened, pressure break
Gaza's amount is continuously increased in construction technology, operational discharge capacity and operation pressure are continuously improved, these factors are caused in staged fracturing
In work progress, deforming occurs in casing and the case where diameter contracting is increasing.Once occurring deforming or undergauge, conventional at present can
Molten bridge plug because size limitation, can not normally casing into, even if also easily occurring meeting card, the complex situations such as premature setting after tripping in,
Ultimately cause the delay of construction period and other risks including safety, cost.Therefore, in existing shale gas exploitation,
Demand to the solvable bridge plug of small size gradually increases.
For bridge plug solvable for small size, due to the reduction of overall dimensions, the components such as related tube body, slips
Size and thickness also reduce therewith.Meanwhile the solvable alloy for manufacturing solvable bridge plug main structure, can bearing strength compared with one
As alloy used by bridge plug want weak, this allows for the solvable bridge plug of the existing small size existence always using traditional axle plug structure
It can bottleneck.For example, slips setting and central tube periphery, limit slips can design thickness, and cause in the solvable bridge of small size
Easily there is the case where slips piece fracture failure in use in plug, influences the fixed energy in position of the solvable bridge plug in casing
Power；In another example with the diminution of solvable bridge plug size, center length of tube is also significantly shortened, correspondingly, being arranged in outer center
The length that such as packing element on pipe sets critical component also shortens, and then limits and be capable of forming between solvable bridge plug and casing
Set area, influence the solvable bridge plug of small size actually sets performance.
In addition to the above-mentioned problems, due to continuing to use the dual-grip component of traditional bridge plug, i.e. one group of slip assemblies is respectively set at packing element both ends,
Under this structure, obtained small size packer to set stroke longer, be typically only capable to carry out by the way of coiled tubing
It sets, and is not suitable for cable and sets, it is single to set mode, is unfavorable for using in the case where setting the limited operating condition of stroke.
Summary of the invention
The present invention provides a kind of solvable bridge plugs of small size, it is therefore intended that the features based on the solvable bridge plug of small size,
It is improved for the functional structure of solvable bridge plug, solves existing solvable bridge plug and occurred when carrying out small scale structures improvement
Set scarce capacity, set the too long problem of stroke.
The technical solution adopted by the invention is as follows:
A kind of solvable bridge plug of small size, including central tube；The upper end of the central tube is arranged with the pressure for compressing packing element
Contracting set；Limit C-shaped ring is accompanied between the wedging ring and the central tube；Lead between the wedging ring and the limit C-shaped ring
Screw thread is crossed to be fixed；Compression direction of travel on the lateral wall of the central tube along compression assembly is provided with shape of threads convex row
It rises；The inner wall of the limit C-shaped ring is provided with the continuous groove of shape of threads being meshed with the described continuous protrusion of shape of threads；Screw thread
The continuous groove of shape of threads shape continuous protrusion and be meshed therewith enables limit C-shaped ring by way of precession and center
Assembly is realized between pipe, improves assembly efficiency, while being also avoided the continuous protrusion of shape of threads and being filled with the continuous groove of shape of threads
With being worn in the process, the realization of limit C-shaped ring position-limiting action risen to wedging ring ensure that.
The working principle of the technical program is as follows:
During tripping in, the fashionable thrust applied to solvable bridge plug is much smaller than the setting force to bridge plug by under, because
This, limit C-shaped ring can be by between the continuous protrusion of shape of threads set by the continuous groove of shape of threads thereon and center pipe surface
Be formed by engagement limit securely with the surface of central tube on.Simultaneously as being also between limit C-shaped ring and wedging ring
It is fixedly connected by screw thread, there is also the effects by screw thread engagement limit between the two, therefore, limit C-shaped ring
The restriction of position also further defines the position of wedging ring, the compression in advance so as to avoid wedging ring to packing element.
When solvable bridge plug reaches setting position, setting force is applied on wedging ring, and then is transmitted to connected limit
In the C-shaped ring of position, the impact force as caused by setting force is relatively large, C-shaped ring is limited under the active force, from thereon
Opening position starts to expand, so that its internal diameter becomes larger, so that the continuous groove of shape of threads thereon and the shape of threads on central tube
Continuous protrusion engagement failure generates tripping, then moves down with moving down for wedging ring.In this way, wedging ring can be in setting force
Under effect, along central tube move downward and to packing element generate extruding, the latter be squeezed deformation expansion and complete set.
After the completion of setting, the impact force as caused by setting force disappears, and wedging ring acts on quiet in limit C-shaped ring
Only power is insufficient to allow the latter to generate expansion, therefore limit C-shaped ring can pass through the continuous groove of shape of threads and central tube thereon again
Be formed by between the continuous protrusion of shape of threads set by surface engagement limit securely and the surface of central tube on, to make
It obtains packing element and is constantly in compand, so that packing element, which is formed by, sets effect maintenance,
Compared to traditional dual-grip bridge plug, the structure cooperated in the technical program using wedging ring and limit C-shaped ring, substitution
Bridge plug component in dual-grip structure bridge plug, simultaneously because itself is provided simultaneously with the ability of travelling downwardly and restraining ability,
It does not need the relative motion as existing slip assemblies through two components and generates expansion to realize fixation, therefore, Neng Gou great
Amplitude reduction sets stroke, and the solvable bridge plug of small size is set by cable pumping.Further, since reducing a card
Therefore watt component has saved the usable floor area on central tube, allow packing element to carry out growth design, to ensure that the expansion of packing element
Amplitude, and then ensure that packing element can be generated sets effect and will not become smaller because of bridge plug size and weaken, and is small size
Solvable bridge plug provides a reliable performance and the high design basis of practicability.
Further, the lower end of the central tube is arranged with the downward cone of the conical surface；The cone and central tube it
Between be provided with cone made to be fixed on the pinning on central tube；The cone surface is equipped with slips ring；The lower section of the slips ring
It is disposed with anticollision ring and shearing ring；The screw rod of giving up that both ends all extend to outside central tube is provided in the central tube, with
The slips group, the anticollision ring and the shearing ring and the central tube is set to be connected as an entirety.
By the design of above-mentioned " screw rod of giving up+solvable bridge plug " monoblock type, will be fixed on central tube in traditional bridge plug
Component transfers to be attached assembly using screw rod of giving up, and which reduces the length of central tube, have saved the material of central tube.
Simultaneously as above-mentioned design, the slips ring that would be equivalent to the slips of traditional bridge plug is arranged outside central tube, not with central tube
Outer wall generates contact, can break through the slips thickness design pole caused by contacting because of slips with center pipe outer wall in traditional bridge plug
Limit allows slips ring to carry out thickening design, to improve the bearing strength of slips ring, further solves bridge plug and carries out small ruler
During very little design, bearing capacity that traditional structure lower slips occur by finite thickness is insufficient, it is easily broken caused by anchor
Determine Problem of Failure, and then ensure that slips ring does the anchoring that play the role of.
In addition, stop nut is tightened in the upper end of central tube, the sealing of central tube inner space can be realized, to set
Enter the sundries such as sandstone inside preceding central tube inner space, stuck caused by avoiding screw rod of giving up because of sundries such as sandstones is asked
Topic, ensure that going on smoothly for the subsequent movement that sets and give up, further improves the reliability of solvable bridge plug.
Preferably, it is uniformly embedded into the anti-tooth butt being fixed on the outer wall of the anticollision ring, anticollision ring can be effectively prevent to exist
Abrasion during tripping in, to improve the reliability of anticollision ring.
More preferably, the anti-tooth butt is made of ceramic, and wear-resisting property is good, is also had after contacting with down-hole liquid good
Good self-lubricating property, further less friction between anti-tooth butt and casing while abrasionproof performance enhancement, are also effectively kept away
The abrasion of casing is exempted from.
Further, the upper end of the screw rod of giving up is fixed with the stop nut that can be engaged with central tube upper end；It is described
Give up screw rod lower end and the shearing ring between be provided with for shearing the fixed shear pin of ring position, the shear strength of shear pin with
Power of giving up when solvable bridge plug is set matches and (greater than the setting force of solvable bridge plug, loses stress less than solvable bridge plug), to protect
Shear pin is smoothly cut short after the completion of card is set, so that solvable bridge plug is given up after setting, screw rod can smoothly give up taking-up.
Further, connection, i.e. stop nut are threadably secured between the stop nut and the upper end of central tube
Screw thread is set on the surface being in contact with central tube, it is corresponding, be also provided on the surface that central tube is in contact with stop nut with
The screw thread that set screw thread matches on stop nut, and two kinds of screw threads have in the vertical direction certain extension, then limit
Position nut is realized between central tube in such a way that screw thread screws to be fixed.
Further, inclined-plane compatible with the cone conical surface is provided on the inner wall of the slips ring；The card
It is circumferential on the outer wall of watt ring evenly distributedly to offer with the axis parallel of slips ring and through the several of slips ring-side wall
Item ruptures slot.By way of the setting rupture slot on monoblock type slips ring, on the one hand compared to conventional split type slips group
Part, integral strength improves, improves the bearing capacity of slip assemblies, can effectively prevent the expansion in advance of slip assemblies, another
The slips ring of aspect, monoblock type is convenient and assembles, and saves assembly time, while also reducing requirement on machining accuracy, saving
Manufacturing cost.
Preferably, the outer wall of the slips ring be open up rupture slot region be evenly arranged with 60 slips teeth.
Preferably, it is described rupture slot item number can be 4,6,8, according to the size of slips ring and bearing strength with
And the size of setting force carries out practical selection.
Further, annular is provided with several fitting grooves being parallel to each other on the outer wall of the slips ring；Each institute
State the solvable compounded rubber circle being each equipped in fitting groove for the limit of slips ring circumference.By solvable compounded rubber circle in slips
The pretightning force of application is changed, slips ring can be promoted to a certain extent and be broken into required for several slips pieces along rupture slot and opened
Power ensure that bridge plug sets opportunity to effectively prevent the problem of slips ring ruptures caused bridge plug premature setting in advance
Accuracy.
Further, in slips ring described in give up screw rod surface on be fixed with for limiting anticollision ring position
Adjusting nut；The upper end face contact of the lower end surface of the adjusting nut and the anticollision ring.Made by the limit of adjusting nut
With when bridge plug can be prevented to be hampered, slips ruptures opening in advance, and packing element shifts to an earlier date extrusion expansion, to prevent bridge plug premature setting.
Further, the adjusting nut is threadably secured connection in the screw rod of giving up, and structure is simple, is easy to add
Work and assembly, and position is allowed to adjust, to change the restraining position of anticollision ring.
Further, the external coating of the bridge plug has the film for controlling dissolution time；So that can be applied according to different
Work process requirements reach the control of the dissolution time to solvable bridge plug by adjusting the dissolution time of film layer, overcome tradition
The fixed problem of solvable bridge plug dissolution time.Control solution rate, Huo Zhetong can be designed by the ingredient of film by controlling dissolution time
The thickness design of film is crossed to control dissolution time, which is organic friction anticorrosive paint, under high temperature and pressure can be molten
Solution, without being influenced by acid, alkali, salting liquid.
Further, the compression, which is placed in the center pipe outer wall between cone, is arranged with the glue set for underground
Cartridge module；The packing element component includes the packing element made of solvable rubber material；In setting process, the compressed set of packing element is transported downwards
The pressure generated when dynamic acts on and occurs to expand deformation in the middle, to set to contacting to realize with the inner wall of casing.
Further, the packing element component further includes the protection component for being symmetrically disposed on packing element both ends；The protection group
Part includes that at least one shield bowl protected for packing element shoulder ensure that the seat of packing element to prevent packing element rhegma due to shoulder
Sealing property.
Among the above, give up screw rod, stop nut, adjusting nut is made of steel alloy, such as corrosion resistant stainless steel, or
There is the high-intensitive carbon steel of corrosion-resistant finishes on surface；Central tube, wedging ring, limit C-shaped ring, the first wrist guard, the second wrist guard, cone,
Slips, anticollision ring, shearing ring and shear pin are all made of soluble metal and are made, such as the solvable alloy of the common magnalium of solvable bridge plug.Packing element
It is made of solvable compounded rubber.
In conclusion compared with the prior art, the invention has the advantages that:
(1) using wedging ring and the structure of C-shaped ring cooperation is limited compared to traditional dual-grip bridge plug, in the technical program,
Instead of a bridge plug component in dual-grip structure bridge plug, simultaneously because itself being provided simultaneously with the ability of travelling downwardly and limit energy
Power does not need to realize fixation by the relative motion generation expansion of two components as existing slip assemblies, therefore, can
It is greatly reduced and sets stroke, the solvable bridge plug of small size is set by cable pumping.Further, since reducing one
Therefore slip assemblies have saved the usable floor area on central tube, allow packing element to carry out growth design, to ensure that packing element
Expansion amplitude, and then ensure that packing element can be generated sets effect and will not become smaller because of bridge plug size and weaken, and is small ruler
Very little solvable bridge plug provides a reliable performance and the high design basis of practicability, allows the further contracting of solvable bridge plug length
It is short；
(2) it by the design of above-mentioned " screw rod of giving up+solvable bridge plug " monoblock type, will be fixed on central tube in traditional bridge plug
Component transfer to be attached assembly using screw rod of giving up, which reduces the length of central tube, have saved the material of central tube
Material.Simultaneously as above-mentioned design, the slips ring that would be equivalent to the slips of traditional bridge plug is arranged outside central tube, not with center
The outer wall of pipe generates contact, can break through the slips thickness design caused by contacting because of slips with center pipe outer wall in traditional bridge plug
The limit allows slips ring to carry out thickening design, to improve the bearing strength of slips ring, it is small to further solve bridge plug progress
During size design, bearing capacity that traditional structure lower slips occur by finite thickness is insufficient, it is easily broken caused by
It is anchored Problem of Failure, and then ensure that slips ring does the anchoring that play the role of；
(3) stop nut is tightened in the upper end of central tube, can be realized the sealing of central tube inner space, thus before setting
Into sundries such as sandstones inside central tube inner space, the stuck problem caused by avoiding screw rod of giving up because of sundries such as sandstones,
It ensure that going on smoothly for the subsequent movement that sets and give up, further improve the reliability of solvable bridge plug；
(4) by the position-limiting action of adjusting nut, when bridge plug can be prevented to be hampered, slips ruptures opening in advance, and packing element mentions
Preceding extrusion expansion, to prevent bridge plug premature setting.
(5) mode of giving up of this bridge plug is given up for shear pin, and shearing ring connects screw rod of giving up by shear pin and loses when setting
When hand screw rod upper lifting force is greater than the intensity that shear pin can bear on shearing ring, screw is cut, the related stop nut one of screw rod of giving up
It rises and is hauled out out of bridge plug central tube, realization is given up, structure of giving up and process of giving up is simple and reliable, controllability is good, and can greatly letter
Change bridge plug body design.
(6) in general, it is designed by the solvable bridge plug of this small size, it is central tube, limit C-shaped ring, wedging ring, packing element, interior
Wrist guard, outer wrist guard, cone, slips, anticollision ring, shearing ring, shear pin can dissolve naturally under the operating condition of shaft bottom, and packing element is using solvable
Rubber production, can dissolve, slips under the operating condition of shaft bottom in the liquid such as clear water, active water, fracturing fluid, water flooding, completion fluid
On slips tooth after pressure-bearing of constructing, be fragmented into powder or clast, after the dissolution of bridge plug ontology, slips tooth is decomposed in shaft bottom solution
In, ground finally is discharged to returning drain and return together from shaft bottom, and the solvable bridge plug of the small size has lesser outer diameter, can be in pressure break
When process middle sleeve moderate finite deformation undergauge, realizes the Inter-zonal packing of staged fracturing operation or realized the closure in well；This is small
The solvable bridge plug of size, it is short to set stroke, can be connected with Baker10# setting tool, be pumped into well with cable, be not necessarily to coiled tubing
Enter well；Without boring except technique and pit shaft clast salvage prune job after the bridge plug construction operation, construction period can be shortened, it is real
Now simplify fracturing technology, reduced well cost, saves completion time, while the bridge plug can install gas recovery well in situation not with pressure
Mouth and tripping in completion tubular column complete fractured horizontal well gas testing completion practice, greatly shorten construction period, reduce complex process
Degree has cut down well control safety risk, and it is simple to enter well, easy to operate, avoids underground work risk, greatly shortens construction period；
(7) in addition, the external coating of the solvable alloy product of this bridge plug has the film for controlling dissolution time, so that can basis
Different construction technology demands, the control of the dissolution time to solvable bridge plug is reached by adjusting the dissolution time of film layer, is overcome
The fixed problem of traditional solvable bridge plug dissolution time.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the solvable bridge plug of heretofore described small size
Fig. 2 is diagrammatic cross-section of the solvable bridge plug of small size described in Fig. 1 along A-A
Fig. 3 be the solvable bridge plug of small size described in Fig. 1 give up screw rod along B-B diagrammatic cross-section
Fig. 4 is the half-section diagram of the limit C-shaped ring of the solvable bridge plug of heretofore described small size
Fig. 5 is the schematic top plan view of the limit C-shaped ring of the solvable bridge plug of heretofore described small size
Marked in the figure: 1- central tube, 2- limit C-shaped ring, 3- wedging ring, 4- packing element, the first wrist guard of 5-, the second wrist guard of 6-,
7- cone, 8- pinning, 9- fitting groove, 10- slips ring, 11- slips tooth, 12- anticollision ring, 13- shearing ring, 14- shear pin, 15- are anti-
Tooth butt, 16- adjusting nut, 17- give up screw rod, 18- stop nut.
Specific embodiment
All features disclosed in this specification can be with any other than mutually exclusive feature and/or step
Mode combines.
In order to make those skilled in the art more fully understand technical solution of the present invention, below with reference to Fig. 1~5 and specifically
Embodiment the present invention is described in further detail.
Embodiment
The solvable bridge plug of the small size of the present embodiment, as shown in Figure 1, the bridge plug includes central tube 1, central tube 1 is in structure
Hollow tubular, one end screw-casing of central tube 1 are limited a C-shaped ring 2, and inside and outside limit C-shaped ring 2 is screw thread, limit the outer spiral shell of C-shaped ring 2
Rotation set sets wedging ring 3, and the other end of central tube 1 is arranged cone 7, is locked between cone 7 and central tube 1 with pinning 8, and pinning 8 is adopted
It is made of copper.Wedging ring 3 between cone 7, be successively arranged on central tube 1 packing element 4 of solvable compounded rubber, the first wrist guard 5,
Second wrist guard 6.It is successively slips ring 10, anticollision ring 12 and shearing ring 13 after cone 7.Slips ring 10 is equipped with made of ceramics
Slips tooth 11, anti-tooth butt 15 made of insertion ceramics, shearing ring 12 are connect equipped with shear pin 14 with screw rod 17 of giving up on anticollision ring 12.
Screw rod 17 of giving up is equipped with adjusting nut 16, and adjusting nut 16 can limit anticollision ring position, when bridge plug being prevented to be hampered, slips ring 10
Rupture is opened in advance, and the first wrist guard 5, the second wrist guard 6 are expanded in advance, and packing element 4 shifts to an earlier date extrusion expansion, to prevent bridge plug from sitting in advance
Envelope.Give up screw rod 17 by central tube 1, limit C-shaped ring 2, wedging ring 3, packing element 4, the first wrist guard 5, the second wrist guard 6, cone 7, card
Watt ring 10, anticollision ring 12, shearing ring 13 are connected integral by shear pin 14 and stop nut 18.Give up screw rod 17, adjust spiral shell
Mother 16, stop nut 18 are made of steel alloy；Central tube 1, limit C-shaped ring 2, wedging ring 3, the first wrist guard 5, the second wrist guard 6,
Cone 7, slips ring 10, anticollision ring 12, shearing ring 13 and shear pin 14 are all made of soluble metal and are made.Packing element 4 is using solvable compound
Rubber is made.
The solvable bridge plug of the small size of the completion of above-mentioned assembly is equal to setting property of pressure-bearing with traditional solvable bridge plug meeting
Can while, outer diameter can be reduced to 85~88mm, while central tube aperture is 25~30mm, no matter outer diameter and inner diameter index
It is superior to traditional bridge plug of existing structure, can either complete to set in the slype of underground, and be capable of providing bigger internal diameter
Access improves the working efficiency of fracturing operation conducive to the discharge for returning drain.
In the present embodiment, the locking position limiting structure of 1 one end of central tube is to be located at 1 one end of central tube threadingly screw-casing
Limit a C-shaped ring 2, limit 2 inside and outside wall of C-shaped ring has a screw thread, and limit 2 outside spiral of C-shaped ring is arranged wedging ring 3, wedging ring 3 with
Central tube 1 locks limit by the internal and external threads of limit C-shaped ring 2.So that wedging ring 3 can not continue to the end of central tube 1 after
Continuous movement.
In the present embodiment, the locking position limiting structure of 1 other end of central tube is arranged with positioned at the other end of central tube 1
Cone 7, with the locking limit of pinning 8 between cone 7 and central tube 1.
In a particular embodiment, slips ring 10 is monoblock type, and 6 rupture slots of circumference uniform distribution rupture slot and do not run through.Cone
The contact position of body 7 and slips ring 10 is provided with guiding surface, slips ring 10 and anticollision ring 12 and is equipped with guide groove in contact site, leads
When slips ring 10 can be effectively ensured set to inclined-plane, guide groove and rupture slot, the motion profile in cone 7 is uniform along guide groove
It opens.10 circumference of slips ring is equipped with 60 slips teeth, finally guarantees to be embedded in casing wall by slips tooth to realize slips ring
It is firmly secured at the predeterminated position of casing.
In addition in a particular embodiment, to prevent from rupturing in advance during 10 tripping in of slips ring, set on slips ring 10
2 solvable compounded rubber circle fitting grooves 9 are equipped with, slips ring 10 assists circumference limit by solvable compounded rubber circle.
In a particular embodiment, bridge plug gives up screw rod 17 equipped with adjusting nut 16, and adjusting nut 16 can limit anti-
12 position of ring is hit, slips ring 10 ruptures opening in advance when bridge plug being prevented to be hampered, and the first wrist guard 5, the second wrist guard 6 are expanded in advance, glue
Cylinder 4 shifts to an earlier date extrusion expansion, to prevent bridge plug premature setting.
In a particular embodiment, this bridge plug with give up screw rod 17 by central tube 1, limit C-shaped ring 2, wedging ring 3, glue
The 4, first wrist guard 5 of cylinder, the second wrist guard 6, cone 7, slips ring 10, anticollision ring 12, shearing ring 13 pass through shear pin 14 and stop nut
18 connections are integral.
In a particular embodiment, the mode of giving up of this bridge plug is that shear pin 14 is given up, and shearing ring 13 is connected by shear pin 14
Screw rod 17 of giving up is connect, when setting, when 17 upper lifting force of screw rod of giving up is greater than the intensity that shear pin 14 can bear on shearing ring 13, spiral shell
Nail 14 is cut, and gives up the related adjusting nut 16 of screw rod 17 and stop nut 18 is hauled out out of bridge plug central tube 1 together, realization is lost
Hand, structure of giving up and process of giving up is simple and reliable, controllability is good.And in the present embodiment, shearing ring 13 and shear pin 14 are all to use
Soluble metal is made
In the present invention, the surface of bridge plug (each component) is coated with the film for controlling dissolution time length.So that can basis
Different construction technology demands reaches the control of the dissolution time to solvable bridge plug by adjusting the dissolution time of film layer, gram
The fixed problem of traditional solvable bridge plug dissolution time is taken.Control dissolution speed can be designed by the ingredient of film by controlling dissolution time
Degree, or controls dissolution time by the thickness design of film, which is organic friction anticorrosive paint, high temperature,
It can be dissolved under high pressure, without being influenced by acid, alkali, salting liquid.
The bridge plug course of work is as follows: solvable bridge plug connects gunpowder or hydraulic setting tool first when in use, utilizes electricity
Cable or coiled tubing are transported to pit shaft predetermined position, and the thrust generated by gunpowder explosion setting tool is in wedging ring
3, pulling force effect is in screw rod 17 of giving up, by wedging ring 3 to packing element 4, the first wrist guard 5, the second wrist guard 6, cone 7, slips, anticollision
Ring 12 applies a downward thrust, and screw rod 17 of giving up applies one upwards to shearing ring 13, anticollision ring 12 by shear pin 14
Pulling force, when downward thrust and upward pulling force reach certain value, the shear pin 14 on shearing ring 13 is broken, and setting tool connects
With giving up, screw rod 17 and adjusting nut 16 and stop nut 18 are detached from bridge plug together, and realization is given up.Slips tooth 11 at this time
It is crushed and is embedded on internal surface of sleeve pipe, packing element 4, which expands, simultaneously to be sealed, and the first wrist guard 5, the second wrist guard 6 expand outwardly and be affixed on casing
Wall is completed to set.It is mentioned on cable, drive perforating gun is mobile, progress igniting jet hole operation behind arrival designated position, after the completion of perforation
Perforating gun, setting tool are inconjunction with and give up screw rod 17 and the tools such as adjusting nut 16 and stop nut 18 propose well together
It is interior, solvable ball is put into, ball is pumped to solvable bridge plug ball seat position on central tube 1, after solvable ball reaches designated position, is carried out
Pressing crack construction, after the completion of pressure break, closing well, during this period in bridge plug dissolved naturally in well.
In the present invention, soluble metal (solvable alloy), can sol rubber as current material, answered on bridge plug
With by this solvable bridge plug design, screw rod 17 of giving up, adjusting nut 16, stop nut 18 are made of steel alloy, gunpowder explosion
It sets, perforating gun is taken out of with setting tool after shooting away hole；And it stays and participates in throwing solvable ball pressing crack construction in pit shaft
Central tube 1, limit C-shaped ring 2, wedging ring 3, the first wrist guard 5, the second wrist guard 6, cone 7, slips, anticollision ring 12,13 and of shearing ring
Shear pin 14 is all made of soluble metal and is made.Packing element 4 is made of solvable compounded rubber.It can also be naturally molten under the operating condition of shaft bottom
Solution.Slips tooth 11 on slips is fragmented into powder or clast, after the dissolution of bridge plug ontology, slips tooth 11 is decomposed after pressure-bearing of constructing
In the solution of shaft bottom, ground finally is discharged to returning drain and return together from shaft bottom.
Therefore it can be shortened construction after the bridge plug construction operation without boring except technique and pit shaft clast salvage prune job
Period is realized and simplifies fracturing technology, reduced well cost, saves completion time, while the bridge plug can pacify in situation not with pressure
It fills gas production wellhead and tripping in completion tubular column completes fractured horizontal well gas testing completion practice, greatly shorten construction period, reduce
Complex process degree has cut down well control safety risk.
The specific embodiment of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application protection scope therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, under the premise of not departing from technical scheme design, various modifications and improvements can be made, these belong to this
The protection scope of application.
Claims (10)
1. a kind of solvable bridge plug of small size, including central tube；It is characterized by: the upper end of the central tube is arranged with for compressing
The wedging ring of packing element；Limit C-shaped ring is accompanied between the wedging ring and the central tube；The wedging ring and the limit C-shaped
It is fixed between ring by screw thread；Compression direction of travel on the lateral wall of the central tube along compression assembly is provided with screw thread
Shape is continuously raised；It is continuous that the inner wall of the limit C-shaped ring is provided with the shape of threads being meshed with the described continuous protrusion of shape of threads
Groove.
2. the solvable bridge plug of a kind of small size according to claim 1, it is characterised in that: the lower end set of the central tube
Equipped with the cone that the conical surface is downward；Being provided between the cone and central tube makes cone be fixed on the pinning on central tube；It is described
Cone surface is equipped with slips ring；Anticollision ring and shearing ring are disposed with below the slips ring；It is set in the central tube
It is equipped with the screw rod of giving up that both ends all extend to outside central tube, so that the slips group, the anticollision ring and the shearing ring and institute
It states central tube and is connected as an entirety.
3. the solvable bridge plug of a kind of small size according to claim 2, it is characterised in that: the upper end of the screw rod of giving up is fixed
There is the stop nut that can be engaged with central tube upper end；It is provided between the lower end and the shearing ring of the screw rod of giving up for cutting
Cut the fixed shear pin of ring position.
4. the solvable bridge plug of a kind of small size according to claim 3, it is characterised in that: the stop nut and central tube
Connection is threadably secured between upper end.
5. the solvable bridge plug of a kind of small size according to claim 2, it is characterised in that: be arranged on the inner wall of the slips ring
There is inclined-plane compatible with the cone conical surface；It is circumferential on the outer wall of the slips ring evenly distributedly to offer and slips ring
Axis parallel and several rupture slots for not running through slips ring-side wall.
6. the solvable bridge plug of a kind of small size according to claim 5, it is characterised in that: annular on the outer wall of the slips ring
It is provided with several fitting grooves being parallel to each other；It is each equipped in each fitting groove for the solvable of slips ring circumference limit
Compounded rubber circle.
7. the solvable bridge plug of a kind of small size according to claim 2, it is characterised in that: give up described in slips ring
The adjusting nut for limiting anticollision ring position is fixed on the surface of screw rod；The lower end surface of the adjusting nut and the anticollision
The upper end face contact of ring.
8. the solvable bridge plug of a kind of small size according to claim 7, it is characterised in that: the adjusting nut is given up in described
Screw rod is threadably secured connection.
9. the solvable bridge plug of a kind of small size according to claim 2, it is characterised in that: the compression is placed between cone
The packing element component set for underground is arranged in the center pipe outer wall；The packing element component includes by solvable rubber material system
At packing element.
10. the solvable bridge plug of a kind of small size according to claim 9, it is characterised in that: the packing element component further includes pair
Claim the protection component for being set to packing element both ends；The protection component includes the shield bowl that at least one is used to protect packing element shoulder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811608934.8A CN109519146A (en) | 2018-12-26 | 2018-12-26 | A kind of solvable bridge plug of small size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811608934.8A CN109519146A (en) | 2018-12-26 | 2018-12-26 | A kind of solvable bridge plug of small size |
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| CN109519146A true CN109519146A (en) | 2019-03-26 |
Family
ID=65796895
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811608934.8A Pending CN109519146A (en) | 2018-12-26 | 2018-12-26 | A kind of solvable bridge plug of small size |
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| CN (1) | CN109519146A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017117A (en) * | 2019-05-21 | 2019-07-16 | 卢晓东 | A kind of solubility bridge plug |
| CN110513074A (en) * | 2019-08-16 | 2019-11-29 | 中国石油集团长城钻探工程有限公司 | Dissolvable bridge plug |
| CN112555564A (en) * | 2021-02-25 | 2021-03-26 | 东营市恒康石油科技开发有限公司 | Leakage-repairing lining pipe for oil well casing |
| CN112576231A (en) * | 2021-02-24 | 2021-03-30 | 四川省威沃敦化工有限公司 | All-metal soluble fracturing sectionalizer |
| CN112709545A (en) * | 2021-01-15 | 2021-04-27 | 四川省威沃敦化工有限公司 | Soluble ball seat capable of improving dissolving speed |
| CN112796701A (en) * | 2021-01-26 | 2021-05-14 | 四川省威沃敦化工有限公司 | Soluble bridge plug suitable for high-temperature well condition |
| CN112855066A (en) * | 2021-01-05 | 2021-05-28 | 孙淑芳 | From soluble bridging plug of taking fracturing ball |
| CN113155371A (en) * | 2021-03-10 | 2021-07-23 | 四川省威沃敦化工有限公司 | Soluble bridge plug anchoring and sealing performance testing tool and using method thereof |
| CN113216898A (en) * | 2021-03-04 | 2021-08-06 | 中国石油化工股份有限公司 | Full-solution fracturing bridge plug |
| CN116677344A (en) * | 2022-06-17 | 2023-09-01 | 阜宁县宏达石化机械有限公司 | High-temperature-resistant soluble bridge plug |
| CN116733413A (en) * | 2023-05-31 | 2023-09-12 | 江苏腾龙石化机械有限公司 | Guiding self-dissolving type soluble bridge plug |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110017117A (en) * | 2019-05-21 | 2019-07-16 | 卢晓东 | A kind of solubility bridge plug |
| CN110513074A (en) * | 2019-08-16 | 2019-11-29 | 中国石油集团长城钻探工程有限公司 | Dissolvable bridge plug |
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| CN112855066B (en) * | 2021-01-05 | 2021-09-14 | 大安鸿源管业有限公司 | From soluble bridging plug of taking fracturing ball |
| CN112855066A (en) * | 2021-01-05 | 2021-05-28 | 孙淑芳 | From soluble bridging plug of taking fracturing ball |
| CN112709545A (en) * | 2021-01-15 | 2021-04-27 | 四川省威沃敦化工有限公司 | Soluble ball seat capable of improving dissolving speed |
| CN112796701A (en) * | 2021-01-26 | 2021-05-14 | 四川省威沃敦化工有限公司 | Soluble bridge plug suitable for high-temperature well condition |
| CN112576231A (en) * | 2021-02-24 | 2021-03-30 | 四川省威沃敦化工有限公司 | All-metal soluble fracturing sectionalizer |
| CN112576231B (en) * | 2021-02-24 | 2021-06-01 | 四川省威沃敦化工有限公司 | All-metal soluble fracturing sectionalizer |
| CN112555564A (en) * | 2021-02-25 | 2021-03-26 | 东营市恒康石油科技开发有限公司 | Leakage-repairing lining pipe for oil well casing |
| CN113216898A (en) * | 2021-03-04 | 2021-08-06 | 中国石油化工股份有限公司 | Full-solution fracturing bridge plug |
| CN113155371A (en) * | 2021-03-10 | 2021-07-23 | 四川省威沃敦化工有限公司 | Soluble bridge plug anchoring and sealing performance testing tool and using method thereof |
| CN116677344A (en) * | 2022-06-17 | 2023-09-01 | 阜宁县宏达石化机械有限公司 | High-temperature-resistant soluble bridge plug |
| CN116733413A (en) * | 2023-05-31 | 2023-09-12 | 江苏腾龙石化机械有限公司 | Guiding self-dissolving type soluble bridge plug |
| CN116733413B (en) * | 2023-05-31 | 2024-01-02 | 江苏腾龙石化机械有限公司 | Guiding self-dissolving type soluble bridge plug |
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