CN108716379A - A kind of solvable bridge plug of big orifice - Google Patents
A kind of solvable bridge plug of big orifice Download PDFInfo
- Publication number
- CN108716379A CN108716379A CN201810825727.1A CN201810825727A CN108716379A CN 108716379 A CN108716379 A CN 108716379A CN 201810825727 A CN201810825727 A CN 201810825727A CN 108716379 A CN108716379 A CN 108716379A
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- China
- Prior art keywords
- slips
- bridge plug
- cone
- big orifice
- guide shoe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims description 44
- 239000000956 alloy Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 210000000664 rectum Anatomy 0.000 abstract description 9
- 230000002028 premature Effects 0.000 abstract description 8
- 230000008034 disappearance Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006049 ring expansion reaction Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000000638 stimulation 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
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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)
- Earth Drilling (AREA)
Abstract
The present invention relates to oil/gas well downhole tool technical fields, specifically disclose a kind of solvable bridge plug of big orifice, including pressure break ball, cone, slips and guide shoe, the upper end of the lower end connection slips of the cone, the upper end of the lower end connection guide shoe of the slips, the junction of the cone and slips is equipped with seal assembly, the upper end sealed connection of the pressure break ball and cone；The upper end of the cone is equipped with shear pin nail hole；The lower end inner surface of the guide shoe is equipped with groove, upper each component of the present invention, which is directly or indirectly fixed on, to be set on adapter, it effectively prevents bridge plug and occurs unexpected premature setting when entering well, and there is no mandrel inside the bridge plug, the uniqueness of its structure makes interior latus rectum obtain increasing to greatest extent, interior latus rectum than conventional solvable bridge plug is big by 85% or so, greatly reduces bridge plug before being completely dissolved disappearance, the blocked possibility of internal channel.
Description
Technical field
The present invention relates to oil/gas well downhole tool technical field more particularly to a kind of solvable bridge plugs of big orifice.
Background technology
In well fracturing yield-increasing technology field, tripping in composite material bridge plug carries out blocking pressure break being one be generally used
Kind method.Composite material bridge plug is being bored except rear, it can be achieved that full pit shaft latus rectum, is conducive to the workover treatment in later stage, but due to material
The limitation of performance, there are following limitations：It is removed 1. composite material bridge plug needs to bore after the completion of fracturing work, increases the work in later stage
Industry expense, increases operating risk；2. boring except composite material bridge plug is generally realized by coiled tubing tripping in milling tool, work as oil
When gas well horizontal segment is long, cannot effectively apply bit pressure with bore remove bridge plug, so composite bridge plug can tripping in horizontal segment depth
It is limited；3. composite material bridge plug is not since bridging material mechanical strength is high, internal diameter is smaller, and open flow returns row after pressure break
When, it will produce the bigger pressure difference that shuts off.
Invention content
In view of the above technical problems, the present invention provides one kind removes without brill, effectively prevent premature setting, is more solvable than conventional
The solvable bridge plug of big orifice of the interior latus rectum big 85% or so of bridge plug.
In order to solve the above technical problem, the present invention provides concrete scheme it is as follows：A kind of solvable bridge plug of big orifice, including
Pressure break ball, cone, slips and guide shoe, the upper end of the lower end connection slips of the cone, the lower end connection guide shoe of the slips
The junction of upper end, the cone and slips is equipped with seal assembly, the upper end sealed connection of the pressure break ball and cone；The cone
The upper end of body is equipped with shear pin nail hole；The lower end inner surface of the guide shoe is equipped with groove.
Wherein, pressure break ball, cone, slips and guide shoe use solvable magnesium alloy material, and seal assembly uses can sol rubber
Material, after completing oil gas field underground fracture operation, bridge plug can voluntarily dissolve in clear water, active water, fracturing fluid, water flooding,
It realizes full pit shaft latus rectum, eliminates the continuous tubing drill that conventional press-fracturing bridge plug needs after the completion of fracturing work and remove bridge plug operation,
It saves operating expenses and avoids conventional bridge plug and bore except the risk in operation.
Preferably, the lower end inner surface of the slips is equipped with internal thread, and outer spiral shell is equipped on the upper end outer surface of guide shoe
Line, the external screw thread matching connection on the internal thread and guide shoe on slips, makes slips be connect with guide shoe firm, prevents bridge plug from entering well
When premature setting, improve stability in use.
Preferably, the seal assembly is described successively including sealing ring, the first sealing support ring and the second sealing support ring
First sealing support ring be equipped with the first notch, it is described second sealing support ring be equipped with the second notch, first notch and
180 degree setting is mutually staggered between second notch, plays protection sealing ring, sealing ring is prevented to be extruded when bearing High Pressure Difference
Effect.
Preferably, the lower end inner surface of the cone is equipped with chamfering, plays the role of guiding and sets adapter taking-up.
Preferably, the guide shoe is equipped with flowing hole, and flowing hole can prevent the open flow after pressure break from returning previous interval when row
Pressure break ball on return blocking and return row channel, ensure that the row of returning channel is unobstructed.
Preferably, the outer surface conical surface of the cone and axis direction angulation range are 5-10 degree；The sealing
Ring inner surface is the conical surface with axis direction angulation range 5-10 degree, the outer surface conical surface of cone with formed by axis direction
Angle is consistent with the frustoconical bevel angle of sealing ring inner surface setting, and sealing effect is good.
Preferably, the slips outer surface, which is set, studs with tooth grain, and the tooth grain is axial to be with slips axial direction angulation range
75-80 degree plays the role of bridge plug to be anchored on casing.
Preferably, the tooth grain is alloy or ceramic tooth grain, wherein ceramics use high-strength ceramic.
Preferably, the height that the tooth grain protrudes slips makes bridge plug when setting less than the height of sealing ring protrusion slips,
Sealing ring, which first expands, is attached to casing wall, and then slips is just anchored on casing, and it is to be squeezed between cone and casing to make sealing ring
, ensure sealing effect.
Preferably, the slips upper end is equipped with the first open slot, and slips lower end is equipped with the second open slot, first opening
Slot and the second open slot are disposed in an evenly spaced relation on slips, play the role of bridge plug when setting, slips uniformly opens.
Compared with prior art, the beneficial effects of the present invention are：1, the present invention is after completing fracturing work, and bridge plug is in well
Inside voluntarily dissolving disappears, and realizes full pit shaft latus rectum, is removed due to being not necessarily to bore, reduces operating cost, and eliminates and make due to boring to remove
Operating risk caused by industry；
2, the solvable bridge plug of big orifice of the invention is removed due to can voluntarily dissolve to be not necessarily to bore, can not be by coiled tubing tripping in water
The limitation of flat section depth so that the staged fracturing volume increase of more long horizontal sections is achieved, and improves the rate of oil and gas recovery；
3, the solvable bridge plug of big orifice of the invention, the closure function of bridge plug is realized with few number of parts, is eliminated common
Necessary mandrel part in solvable bridge plug, due to the uniqueness of structure, the interior latus rectum that internal diameter compares conventional solvable bridge plug is big
85% or so, due to its large diameter, the post-fracturing row of returning is advantageously promoted, oil gas field is allow faster to go into operation；
4, cone upper end is equipped with shear pin nail hole, can be fixed to and be set on the adjustment nut of adapter by shear pin cooperation,
The lower end inner surface recesses of guide shoe and set the firm fixation of pawl on adapter, therefore each component on the solvable bridge plug of big orifice
It is set on adapter by being directly or indirectly fixed on, effectively prevents bridge plug and occur unexpected premature setting when entering well.
Description of the drawings
Fig. 1 is the general assembly drawing of the present invention；
Fig. 2 is the structural schematic diagram of the first sealing support ring and the second sealing support ring；
Fig. 3 is slips structural schematic diagram；
Fig. 4 is to set adapter structure schematic diagram；
Fig. 5 is that the present invention is connected into well schematic diagram；
Wherein, 1 is pressure break ball；2 be cone；21 be shear pin nail hole；22 be chamfering；3 be slips；31 be tooth grain；32 be first
Open slot；33 be the second open slot；4 be guide shoe；41 be groove；42 be flowing hole；5 be seal assembly；51 be sealing ring；52 are
First sealing support ring；53 be the second sealing support ring；521 be the first notch；531 be the second notch；6 be to set adapter；
61 be pushing cylinder；62 be connector；63 be pull rod；64 be adjustment nut；65 be shear screw of slipping out of the hand；66 be pawl；7 be to set work
Tool.
Specific implementation mode
The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention are more
It is easily readily appreciated by one skilled in the art, to make apparent define to protection scope of the present invention.
Please refer to Fig. 1-Fig. 3, present embodiments provide a kind of solvable bridge plug of big orifice, including pressure break ball, cone, slips and
The junction of guide shoe, the upper end of the lower end connection slips of cone, the upper end of the lower end connection guide shoe of slips, cone and slips is equipped with
The upper end of seal assembly, pressure break ball and cone is tightly connected；The upper end of cone is equipped with shear pin nail hole；The lower end inner surface of guide shoe
Equipped with groove, wherein pressure break ball, cone, slips and guide shoe use solvable magnesium alloy material, and seal assembly uses can sol rubber
Material, after completing oil gas field underground fracture operation, bridge plug can voluntarily dissolve in clear water, active water, fracturing fluid, water flooding,
It realizes full pit shaft latus rectum, eliminates the continuous tubing drill that conventional press-fracturing bridge plug needs after the completion of fracturing work and remove bridge plug operation,
It saves operating expenses and avoids conventional bridge plug and bore except the risk in operation.
In the specific use process, elder generation the solvable bridge plug of the big orifice and sets adapter, setting tool company on the ground
It connects, cone upper end is equipped with shear pin nail hole, can be coordinated fixed to setting on the adjustment nut of adapter by shear pin, be drawn
The lower end inner surface recesses of shoes and set the firm fixation of pawl on adapter, therefore each component quilt on the solvable bridge plug of big orifice
It is directly or indirectly fixed on and sets on adapter, effectively prevent bridge plug and occur unexpected premature setting, and the bridge plug when entering well
Inside does not have mandrel, the uniqueness of structure that interior latus rectum is made to have obtained increasing to greatest extent, than leading in conventional solvable bridge plug
Diameter is big by 85% or so, greatly reduces bridge plug before being completely dissolved disappearance, the blocked possibility of internal channel.
As shown in figure 4, set adapter 6 for what is used in the present embodiment, include pushing cylinder 61, connector 62, pull rod 63,
Adjustment nut 64, shear screw of slipping out of the hand 65 and pawl 66, the solvable bridge plug of big orifice of the present embodiment need to match when being sent into and setting
Set use sets adapter, as shown in figure 5, the connection for the solvable bridge plug of big orifice enters well schematic diagram, is sequentially connected from top to bottom
There is setting tool 7, set adapter 6 and the solvable bridge plug of big orifice.
It is firm in order to make slips connect with guide shoe, bridge plug premature setting when entering well is prevented, stability in use, this reality are improved
The lower end inner surface for applying the slips of example is equipped with internal thread, and the upper end outer surface of guide shoe is equipped with external screw thread, the interior spiral shell on slips
External screw thread matching connection on line and guide shoe, makes the stable connection of slips and guide shoe.
Seal assembly includes sealing ring, the first sealing support ring and the second sealing support ring, the first sealing support ring successively
It is equipped with the first notch, the second sealing support ring is equipped with the second notch, 180 are mutually staggered between the first notch and the second notch
Degree setting is played the role of protecting sealing ring, sealing ring is prevented to be extruded when bearing High Pressure Difference.
The lower end inner surface of cone is equipped with chamfering, and setting adapter convenient for guiding takes out, and guide shoe is equipped with flowing hole, guide shoe
Lower end inner surface be equipped with groove, flowing hole can prevent from returning blocking on the pressure break ball of previous interval when open flow returns row after pressure break
The row of returning channel ensures that the row of returning channel is unobstructed, sets adapter card and be tightened in groove, plays the work that pulling force is provided when fixing and setting
With.
The outer surface conical surface of cone and axis direction angulation range are 5-10 degree；The sealing ring inner surface be with
The conical surface of axis direction angulation range 5-10 degree, the outer surface conical surface and axis direction angulation and the sealing ring of cone
Inner surface setting frustoconical bevel angle it is consistent, sealing effect is good, in the present embodiment cone the outer surface conical surface Yu axis direction at
Angle with sealing ring inner surface setting frustoconical bevel angle be 5 degree, which makes cone when moving down, advantageous in close
Seal ring expands, and so that the first sealing support ring and second is sealed support ring opening, and slips is made to open.
Slips outer surface, which is set, studs with tooth grain, and tooth grain is axial and slips axial direction angulation range is 75-80 degree, plays a bridge
Plug is anchored on effect on casing, and in the present embodiment, axial tooth grain with slips axial direction angulation is 75 degree, and more angle is more just
It is anchored on casing in bridge plug, wherein tooth grain uses material for alloy or high-strength ceramic, can play preferably anchoring and make
With.
Wherein, the height that tooth grain protrudes slips makes bridge plug when setting, sealing ring less than the height of sealing ring protrusion slips
First expansion is attached to casing wall, and then slips is just anchored on casing, and it is extruded between cone and casing to make sealing ring, is ensured
Sealing effect.
Slips upper end is equipped with the first open slot, and slips lower end is equipped with the second open slot, the first open slot and the second open slot
It is disposed in an evenly spaced relation on slips, plays the role of bridge plug when setting, slips uniformly opens, and tooth grain is evenly spaced in first and opens
Between mouth slot and the second open slot.
After the completion of the first segment perforating and fracturing of staged fracturing operation, the solvable bridge plug tool string of tripping in big orifice, big orifice
Solvable bridge plug has the function of that unexpected premature setting, cone is prevented to be fixed to the adjustment nut for setting adapter by shear pin
On, guide shoe is connected through a screw thread fixation with setting the firm fixation of the pawl on adapter, slips by inner surface recesses with guide shoe,
So the part on the solvable bridge plug of big orifice is directly or indirectly fixed on and is set on adapter, it is therefore prevented that the solvable bridge plug of big orifice
Occurs unexpected premature setting when entering well.After tool string is lowered into projected depth, set by cable igniting or hydraulic starting,
Setting tool generation thrust promotion sets adapter pushing cylinder and moves down, to push cone to move down, due to being 5 in cone
The conical surface is spent, cone, which moves down, to be made sealing ring expansion, sealing support ring is made to open, slips is made to open, when sealing ring is bonded completely
Internal surface of sleeve pipe and after having certain extruding, slips anchoring to arrive on internal surface of sleeve pipe, the solvable bridge plug of big orifice sets seat and hangs into, at this time
With slips, wedge is combined together cone securely, cannot continue to move down.
After the completion of the solvable bridge plug of big orifice is set, the thrust that setting tool generates continues to increase, and slips out of the hand when thrust is increased to
When the shearing force of shear screw, shear screw of slipping out of the hand is sheared, and pull rod is up mobile to discharge pawl, then pawl from guide shoe
It extracts, realizes the disengagement of adapter and bridge plug, above put forward tool string a distance and carry out perforation to precalculated position, then take out tool
String.
Pressure break ball is put into, allows its freely falling body or being pumped into the bridge plug position set to carry out fracturing work, at this point,
Pressure break ball seals cone upper end, and annular space realizes the packing of upper and lower fractured interval by seal ring seal between cone and casing.
After the completion of fracturing work, carries out open flow and return row, since the internal diameter of the solvable bridge plug of big orifice is big, in the row of returning to fluid
Shutting off for generating is small, and is not easy to block, and can effectively shift to an earlier date the production time of oil gas field.
The solvable bridge plug of big orifice can voluntarily dissolve in clear water, active water, fracturing fluid, water flooding, after bridge plug dissolving, pit shaft
Reach full-bore, improves the operability of oil/gas well later stage various operations.
In conclusion the solvable bridge plug of big orifice provided by the invention, is applied to well fracturing stimulation work field, can have
Effect ground reduces operating cost and risk, and since its is simple and compact for structure, easy to manufacture, significantly reduces solvable bridge
Fill in cost.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (10)
1. a kind of solvable bridge plug of big orifice, including pressure break ball（1）, cone（2）, slips（3）And guide shoe（4）, it is characterised in that：Institute
State cone（2）Lower end connect slips（3）Upper end, the slips（3）Lower end connect guide shoe（4）Upper end, the cone
（2）With slips（3）Junction be equipped with seal assembly（5）, the pressure break ball（1）With cone（2）Upper end be tightly connected；It is described
Cone（2）Upper end be equipped with shear pin nail hole（21）；The guide shoe（4）Lower end inner surface be equipped with groove（41）.
2. the solvable bridge plug of big orifice according to claim 1, it is characterised in that：The slips（3）Lower end inner surface on
Equipped with internal thread, in guide shoe（4）Upper end outer surface be equipped with external screw thread, the external screw thread on internal thread and guide shoe on slips
With connection.
3. the solvable bridge plug of big orifice according to claim 1, it is characterised in that：The seal assembly（5）Include close successively
Seal ring（51）, first sealing support ring（52）With the second sealing support ring（53）, the first sealing support ring（52）It is equipped with
First notch（521）, the second sealing support ring（53）It is equipped with the second notch（531）, first notch（521）With
Two notches（531）Between mutually stagger 180 degree setting.
4. the solvable bridge plug of big orifice according to claim 1, it is characterised in that：The cone（2）Lower end inner surface set
There is chamfering（22）.
5. the solvable bridge plug of big orifice according to claim 1, it is characterised in that：The guide shoe（4）It is equipped with flowing hole
（42）.
6. the solvable bridge plug of big orifice according to claim 3, it is characterised in that：The cone（2）The outer surface conical surface with
Axis direction angulation range is 5-10 degree；The sealing ring（51）Inner surface be and axis direction angulation range 5-
10 degree of the conical surface.
7. the solvable bridge plug of big orifice according to claim 3, it is characterised in that：The slips（3）Outer surface, which is set, studs with tooth
Grain（31）, the tooth grain（31）Axial direction and slips（3）Axial angulation range is 75-80 degree.
8. the solvable bridge plug of big orifice according to claim 7, it is characterised in that：The tooth grain（31）For alloy or ceramic tooth
Grain.
9. the solvable bridge plug of big orifice according to claim 7, it is characterised in that：The tooth grain（31）Prominent slips（3）'s
Height is less than sealing ring（51）Prominent slips（3）Height.
10. the solvable bridge plug of big orifice according to claim 1, it is characterised in that：The slips（3）It is opened equipped with first upper end
Mouth slot（32）, slips（3）Lower end is equipped with the second open slot（33）, first open slot（32）With the second open slot（33）Uniformly
It is arranged at intervals on slips（3）On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825727.1A CN108716379A (en) | 2018-07-25 | 2018-07-25 | A kind of solvable bridge plug of big orifice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825727.1A CN108716379A (en) | 2018-07-25 | 2018-07-25 | A kind of solvable bridge plug of big orifice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108716379A true CN108716379A (en) | 2018-10-30 |
Family
ID=63914271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810825727.1A Pending CN108716379A (en) | 2018-07-25 | 2018-07-25 | A kind of solvable bridge plug of big orifice |
Country Status (1)
| Country | Link |
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Cited By (25)
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|---|---|---|---|---|
| CN109236230A (en) * | 2018-11-28 | 2019-01-18 | 中国石油集团渤海钻探工程有限公司 | A kind of magnesium-base metal dissolvable bridge plug |
| CN109695434A (en) * | 2018-11-29 | 2019-04-30 | 中国石油天然气股份有限公司 | Bridge plug |
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| CN110017116A (en) * | 2019-05-10 | 2019-07-16 | 天津市玛特瑞科技有限公司 | Press-fracturing bridge plug |
| CN110374549A (en) * | 2019-07-31 | 2019-10-25 | 陕西海格瑞恩实业有限公司 | A kind of solvable big orifice bridge plug of all-metal dual-grip |
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| CN113738296A (en) * | 2021-09-18 | 2021-12-03 | 中国石油化工股份有限公司 | Bridge plug adapter |
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| US11371313B2 (en) * | 2019-11-13 | 2022-06-28 | Petro-King Technology Co., Ltd | Hard-sealing soluble bridge plug |
| CN117090535A (en) * | 2022-05-11 | 2023-11-21 | 大庆油田有限责任公司 | Metal seal assembly suitable for shale oil reservoir environment |
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| CN110397421A (en) * | 2019-07-31 | 2019-11-01 | 陕西海格瑞恩实业有限公司 | A kind of solvable big orifice bridge plug of all-metal single deck tape-recorder watt |
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| WO2021216827A1 (en) | 2020-04-24 | 2021-10-28 | Innovex Downhole Solutions, Inc. | Downhole tool with seal ring and slips assembly |
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