CN203114241U - Fracturing bridge plug - Google Patents
Fracturing bridge plug Download PDFInfo
- Publication number
- CN203114241U CN203114241U CN 201320024979 CN201320024979U CN203114241U CN 203114241 U CN203114241 U CN 203114241U CN 201320024979 CN201320024979 CN 201320024979 CN 201320024979 U CN201320024979 U CN 201320024979U CN 203114241 U CN203114241 U CN 203114241U
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- bridge plug
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- central tube
- fracturing
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Abstract
The utility model relates to the field of unconventional gas deposit multistage fracturing technologies, in particular to a fracturing bridge plug which is used for improvement of staged fracturing of a casing pipe horizontal well and has rapid drilling and removal performance. The fracturing bridge plug comprises a fracturing ball, a center pipe, a shear pin, a slip, a slip ring, a cone, end rubber sleeve, a middle rubber sleeve and a guiding shoe. The fracturing bridge plug is simple in structure, greatly saves grinding and milling time for each bridge plug in a staged fracturing process of the horizontal well, and meets the requirements for low cost in exploration and development of hyposmosis unconventional oil and gas and the environment-friendly requirements.
Description
Technical field
The utility model relates to unconventional gas reservoir multistage fracturing technique field, and particularly a kind of staged fracturing transformation for the sleeve water horizontal well has quick brill except the press-fracturing bridge plug of performance.
Background technology
Bridging plug has been used a lot of years, and traditional bridging plug adopts metal material, by cable or oil pipe G.I.H.In horizontal well, common bridging plug can't be lowered into the precalculated position by cable, therefore needs high temperature high voltage resistant of design, milling excellent performance, can be by the press-fracturing bridge plug of pumping bridging plug in ground to the composite material in precalculated position.
Though conventional press-fracturing bridge plug good airproof performance, withstand voltage difference is high, and the sealing time is long, also can milling, but seat envelope midway takes place when milling easily, and the cost of milling time is longer, metal fragment after the milling is than great, and therefore the row's of returning difficulty can not be applied to the horizontal well in segments fracturing reform.
Though the common nonmetal bridging plug that bores can overcome the above problems, but when a plurality of bridging plugs of horizontal well multistage pressure break worn, after the cartridge of having ground the previous stage bridging plug, pressure between back one-level and the previous stage bridging plug is with direct drill hammer, drill bit is caused damage, therefore a kind of staged fracturing transformation for the sleeve water horizontal well of utility model has quick brill and seems outstanding especially except the press-fracturing bridge plug of performance.
On December 30th, 2011, the State Council approved shale gas is new independent mineral.On March 16th, 2012, National Development and Reform Committee issued " 12 " planning of shale gas specially.The independent mineral attribute of shale gas and special " 12 " planning will be significant to the development that promotes Chinese whole shale gas industry.Advance shale gas to reconnoitre the exploitation process, realize Chinese shale gas scale development as early as possible, be conducive to alleviate Chinese petroleum resources shortage, improve the natural gas supply ability, be conducive to change energy structure in China, increase the clean energy resource supply, form the oil-gas exploration and development new frame.According to characteristics and U.S.'s shale gas exploration and development experience of unconventional energy resource such as shale gas, the unconventional energy resource exploitation must be satisfied: the one, and necessary application level well, the 2nd, must carry out pressure break.Current, the shale gas development well of North America 85% has all adopted horizontal well pumping bridging plug to carry out the staged fracturing completion, so the composite material press-fracturing bridge plug will be the key tool that China's low permeability reservoir is transformed.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, a kind of press-fracturing bridge plug is provided, it is simple in structure, saves the time of each bridging plug in the horizontal well in segments pressure break greatly, and the low cost that satisfies the exploration and development of the unconventional oil gas of China's hyposmosis requires and eco-friendly requirement.
For realizing above-mentioned technical purpose, the scheme that the utility model provides is: a kind of press-fracturing bridge plug, comprise pressure break ball, central tube, shear pin, upper slips, lower slips, slips ring, cone, end packing element, middle packing element and guide shoe, wherein, described central tube external diameter has the reducing step, the maximum outside diameter place arranges the uniform hole that adapts with shear pin, and central tube is radially hollow structure of internal diameter; The upper end of central tube has the pressure break ball chamber that communicates with inner diameter of centerpipe, and described pressure break ball places in the pressure break ball chamber; Central tube has internal thread with the inner radius that pressure break ball chamber communicates, and the lower end cylindrical of central tube has the external screw thread that is connected for guide shoe; The two ends up and down of described end packing element have one group of back band respectively; Described guide shoe is threaded with central tube, and the bottom of guide shoe has the groove that the outer lug for next stage press-fracturing bridge plug central tube endoporus snaps in.
And, having for first chamfering of stablizing the pressure break ball and second chamfering in the described pressure break ball chamber, both distances are more than or equal to the diameter of a pressure break ball, and described first chamfering and/or second chamfering are 30 ~ 45 °.
And, be provided with the ball cage inserted link of cross center's pipe between described first chamfering and second chamfering; Has the guide shoe inserted link on the described guide shoe.
And described central tube, pressure break ball, guide shoe, guide shoe inserted link and ball cage inserted link are the glass fiber reinforced epoxy resin materials.
And the cylindrical of described guide shoe has annular groove milling, in this annular groove milling rubber ring is set.
And, other spacing last stop ring and the following stop ring of being provided for respectively of described upper slips and lower slips, last stop ring and following stop ring are fixed on the central tube by the stop ring pin respectively.
And described upper slips contacts with the conical surface of cone under the effect of slips ring with lower slips, and slips and cone fit angle are 12 ~ 20 °.
And described upward stop ring, slips ring, cone, following stop ring are the glass fiber reinforced epoxy resin materials, and described slips is cast iron or glass fiber reinforced epoxy resin material.
And described back band is by interior back band and the welding of outer back band or bonding forming.
And described back band is aluminium alloys or polytetrafluoroethylmaterial material.
The utility model is a kind of press-fracturing bridge plug, in unconventional oil-gas exploration and development, uses behind a plurality of press-fracturing bridge plugs the once row of returning; Burst slips and slips loop type guarantee that slips can be anchored on the sleeve pipe of various different stages reliably; Inside and outside back band form can effectively protect packing element to bear HTHP; The central tube of engagement and guide shoe structure guarantee the effective milling at a plurality of press-fracturing bridge plugs of net horizontal section; Unique central tube upper end internal thread form can transfer press-fracturing bridge plug to the composite material bridging plug easily fast; Unique guide shoe cylindrical has the waterpower pusher, can guarantee that press-fracturing bridge plug is effectively in the conveying of horizontal segment; Other all adopt the composite material manufacturing except slips, have saved the milling time greatly, have improved milling efficient.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is the guide shoe structural representation.
Fig. 3 is the schematic diagram that cooperates of annular groove milling and rubber ring on the guide shoe.
Fig. 4 is the structural representation of the utility model embodiment two.
Wherein, 1, the pressure break ball, 2, central tube, 3, shear pin, 4, go up stop ring, 5, go up the stop ring pin, 6, the slips ring, 7, slips, 8, cone, 9, back band, 10, end packing element, 11, middle packing element, 12, stop ring down, 13, stop ring pin down, 14, guide shoe, 15, the guide shoe inserted link, 16, ball cage inserted link, 17, first chamfering, 18, second chamfering, 19, maximum outside diameter, 20, internal thread, 21, the conical surface, 22, groove, 23, outer lug, 24, annular groove milling, 25, rubber ring.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Present embodiment provides a kind of press-fracturing bridge plug, as shown in Figure 1, comprise pressure break ball 1, central tube 2, shear pin 3, upper slips 7, lower slips 7, slips ring 6, cone 8, end packing element 10, middle packing element 11 and guide shoe 14, wherein, described central tube 2 external diameters have the reducing step, maximum outside diameter 19 places arrange the uniform hole that adapts with shear pin 3, and central tube 2 is radially hollow structure of internal diameter; The upper end of central tube 2 has the pressure break ball chamber that communicates with central tube 2 internal diameters, and described pressure break ball 1 places in the pressure break ball chamber; Central tube 2 has internal thread 20 with the inner radius that pressure break ball chamber communicates, and easily and fast press-fracturing bridge plug is converted into the composite material bridging plug, and the lower end cylindrical of central tube 2 has the external screw thread that is connected for guide shoe 14; The two ends up and down of described end packing element 10 have one group of back band 9 respectively; Described guide shoe 14 is threaded with central tube 2, as shown in Figure 2, the bottom of guide shoe 14 has the groove 22 that the outer lug 23 for next stage press-fracturing bridge plug central tube 2 endoporus snaps in, when purpose is after the unconventional oil gas staged fracturing milling, after bottom slips 7 is arrived in previous press-fracturing bridge plug milling, parts such as the central tube 2 that milling is remaining and guide shoe 14 will be able to not effectively wornly be finished, they can be pushed to the top of next stage press-fracturing bridge plug by milling head, under the effect of milling rotation, the groove 22 of guide shoe 14 bottoms can make the outer lug 23 of central tube 2 endoporus on the top of next stage press-fracturing bridge plug snap in, then by effectively worn.
Further, have in the aforementioned pressure break ball chamber for first chamfering 17 of stablizing pressure break ball 1 and second chamfering 18, both distances are more than or equal to the diameter of a pressure break ball 1, first chamfering 17 is positioned at the entrance in pressure break ball chamber, effect is to be convenient to pressure break ball 1 and rolls into or pump into pressure break ball chamber in horizontal well, second chamfering 18 is positioned at internal thread 20 places of central tube 2 internal diameters, is the ball seat of pressure break ball 1.Described first chamfering 17 and/or second chamfering 18 are 30 ~ 45 °.
Further, as shown in Figure 4, it is big slightly that the upper length in aforementioned central tube maximum outside diameter 19 uniform holes can be done, and is convenient to arrange between first chamfering 17 and second chamfering 18 the ball cage inserted link 16 of cross center's pipe 2; Have guide shoe inserted link 15 on the described guide shoe 14, purpose is that the resin balls that prevents next stage composite fracturing bridging plug upwards returns the endoporus of blocking upper level press-fracturing bridge plug central tube 2 lower ends.
Further, aforementioned central tube 2, pressure break ball 1, guide shoe 14, guide shoe inserted link 15 and ball cage inserted link 16 are glass fiber reinforced epoxy resin materials.
Further, as shown in Figures 2 and 3, the cylindrical of aforementioned guide shoe 14 has annular groove milling 24, in this annular groove milling 24 rubber ring 25 is set, and is used for horizontal well waterpower and pushes.The tail end of this annular groove milling 24 can be 45 ° of chamferings.
Further, aforementioned upper slips 7 and lower slips 7 other spacing last stop ring 4 and the following stop rings 12 of being provided for respectively, last stop ring 4 and following stop ring 12 are fixed on the central tube 2 by last stop ring pin 5 and following stop ring pin 13 respectively.
Further, aforementioned upper slips 7 contacts with the conical surface 21 of cone 8 under the effect of slips ring 6 with lower slips 7, and slips 7 and cone 8 fit angle are 12 ~ 20 °.
Further, aforementioned upward stop ring 4, slips ring 6, cone 8, following stop ring 12 are glass fiber reinforced epoxy resin materials, and described slips 7 is cast iron or glass fiber reinforced epoxy resin material.
Further, aforementioned back band 9 is by interior back band and the welding of outer back band or bonding forming.
Further, aforementioned back band 9 is aluminium alloys or polytetrafluoroethylmaterial material.
During the utility model work, utilize cable to carry press-fracturing bridge plug and corresponding setting tool, behind the arrival horizontal segment, surface pump is cut down output living thrust on press-fracturing bridge plug, promotes press-fracturing bridge plug and arrives the design level interval.By the given signal in ground, activate the cable setting tool, it is descending that cable setting tool overcoat promotes upper slips 7, reach the certain force value, upper slips 7 slips rings 6 break, it is descending that slips 7 promotes cone 8, and back band 9 end packing elements 10 middle packing element 11 end packing elements 10 and following back bands 9, descending promotion lower cone 8 lower slipses 7 in the stressed back of above-mentioned packing element assembly are gone up in cone 8 extruding, lower slips ring 6 breaks after reaching the certain force value, lower slips 7 slides up to biting sleeve pipe along lower cone 8, holds packing element 10 and middle packing element 11 bulging simultaneously, and 9 back bands open, up to sealing up sleeve pipe, upper slips 7 slides along upper cone 8, lives sleeve pipe up to interlock, and the cable setting tool continues to produce thrust, setting tool will be given up from shear pin 3 with press-fracturing bridge plug, last portable cable carries out corresponding cable perforating job to the design interval, takes out cable and setting tool, and well head is thrown pressure break ball 1, when treating that ball enters horizontal segment, carry out float amount pumping ball and take a seat, after having waited to press, the fracturing work of being correlated with.
Claims (10)
1. press-fracturing bridge plug, comprise pressure break ball, central tube, shear pin, upper slips, lower slips, slips ring, cone, end packing element, middle packing element and guide shoe, it is characterized in that: described central tube external diameter has the reducing step, the maximum outside diameter place arranges the uniform hole that adapts with shear pin, and central tube is radially hollow structure of internal diameter; The upper end of central tube has the pressure break ball chamber that communicates with inner diameter of centerpipe, and described pressure break ball places in the pressure break ball chamber; Central tube has internal thread with the inner radius that pressure break ball chamber communicates, and the lower end cylindrical of central tube has the external screw thread that is connected for guide shoe; The two ends up and down of described end packing element have one group of back band respectively; Described guide shoe is threaded with central tube, and the bottom of guide shoe has the groove that the outer lug for next stage press-fracturing bridge plug central tube endoporus snaps in.
2. a kind of press-fracturing bridge plug according to claim 1, it is characterized in that: have for first chamfering of stablizing the pressure break ball and second chamfering in the described pressure break ball chamber, described first chamfering and/or second chamfering are 30 ~ 45 °.
3. a kind of press-fracturing bridge plug according to claim 2 is characterized in that: the ball cage inserted link that is provided with cross center's pipe between described first chamfering and second chamfering; Has the guide shoe inserted link on the described guide shoe.
4. a kind of press-fracturing bridge plug according to claim 3, it is characterized in that: described central tube, pressure break ball, guide shoe, guide shoe inserted link and ball cage inserted link are the glass fiber reinforced epoxy resin materials.
5. a kind of press-fracturing bridge plug according to claim 1, it is characterized in that: the cylindrical of described guide shoe has annular groove milling, in this annular groove milling rubber ring is set.
6. a kind of press-fracturing bridge plug according to claim 1 is characterized in that: other spacing last stop ring and the following stop ring of being provided for respectively of described upper slips and lower slips, last stop ring is fixed on the central tube by the stop ring pin respectively with following stop ring.
7. a kind of press-fracturing bridge plug according to claim 6, it is characterized in that: described upper slips contacts with the conical surface of cone under the effect of slips ring with lower slips, and slips and cone fit angle are 12 ~ 20 °.
8. a kind of press-fracturing bridge plug according to claim 7 is characterized in that: describedly go up stop ring, slips ring, cone, stop ring is the glass fiber reinforced epoxy resin material down, described slips is cast iron or glass fiber reinforced epoxy resin material.
9. a kind of press-fracturing bridge plug according to claim 1 is characterized in that: described back band is welded or bonding forming by interior back band and outer back band.
10. a kind of press-fracturing bridge plug according to claim 9, it is characterized in that: described back band is aluminium alloys or polytetrafluoroethylmaterial material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320024979 CN203114241U (en) | 2013-01-17 | 2013-01-17 | Fracturing bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320024979 CN203114241U (en) | 2013-01-17 | 2013-01-17 | Fracturing bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114241U true CN203114241U (en) | 2013-08-07 |
Family
ID=48894601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320024979 Withdrawn - After Issue CN203114241U (en) | 2013-01-17 | 2013-01-17 | Fracturing bridge plug |
Country Status (1)
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| CN (1) | CN203114241U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046896A (en) * | 2013-01-17 | 2013-04-17 | 四机赛瓦石油钻采设备有限公司 | Fracturing bridge plug |
| CN103912237A (en) * | 2014-04-01 | 2014-07-09 | 四机赛瓦石油钻采设备有限公司 | Cement bearing and retaining unit |
| CN105545252A (en) * | 2016-02-02 | 2016-05-04 | 四机赛瓦石油钻采设备有限公司 | Anti-rotation fracture bridge plug beneficial to drilling |
| CN105545237A (en) * | 2016-02-02 | 2016-05-04 | 四机赛瓦石油钻采设备有限公司 | Anti-rotation anchoring structure beneficial to drilling |
| CN105822253A (en) * | 2015-01-06 | 2016-08-03 | 中国石油天然气股份有限公司 | Casing sliding sleeve and hydraulic bridge plug combined well completion pipe string and rapid fracturing method |
| CN105840166A (en) * | 2016-04-19 | 2016-08-10 | 中石化重庆涪陵页岩气勘探开发有限公司 | Horizontal well fracturing gas testing and well completion technology adopting completely dissoluble bridge plug |
| CN111963103A (en) * | 2020-08-31 | 2020-11-20 | 唐少峰 | Bridge plug convenient for mounting anchoring device |
-
2013
- 2013-01-17 CN CN 201320024979 patent/CN203114241U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046896A (en) * | 2013-01-17 | 2013-04-17 | 四机赛瓦石油钻采设备有限公司 | Fracturing bridge plug |
| CN103046896B (en) * | 2013-01-17 | 2015-08-26 | 四机赛瓦石油钻采设备有限公司 | A kind of press-fracturing bridge plug |
| CN103912237A (en) * | 2014-04-01 | 2014-07-09 | 四机赛瓦石油钻采设备有限公司 | Cement bearing and retaining unit |
| CN105822253A (en) * | 2015-01-06 | 2016-08-03 | 中国石油天然气股份有限公司 | Casing sliding sleeve and hydraulic bridge plug combined well completion pipe string and rapid fracturing method |
| CN105545252A (en) * | 2016-02-02 | 2016-05-04 | 四机赛瓦石油钻采设备有限公司 | Anti-rotation fracture bridge plug beneficial to drilling |
| CN105545237A (en) * | 2016-02-02 | 2016-05-04 | 四机赛瓦石油钻采设备有限公司 | Anti-rotation anchoring structure beneficial to drilling |
| CN105545252B (en) * | 2016-02-02 | 2018-12-04 | 四机赛瓦石油钻采设备有限公司 | It is a kind of easily to bore anti-rotation press-fracturing bridge plug |
| CN105840166A (en) * | 2016-04-19 | 2016-08-10 | 中石化重庆涪陵页岩气勘探开发有限公司 | Horizontal well fracturing gas testing and well completion technology adopting completely dissoluble bridge plug |
| CN105840166B (en) * | 2016-04-19 | 2018-09-11 | 中石化重庆涪陵页岩气勘探开发有限公司 | A kind of fractured horizontal well gas testing well-completing process using complete dissolvable bridge plug |
| CN111963103A (en) * | 2020-08-31 | 2020-11-20 | 唐少峰 | Bridge plug convenient for mounting anchoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130807 Effective date of abandoning: 20150826 |
|
| RGAV | Abandon patent right to avoid regrant |