CN104612626A - Bridge plug with large drift diameter - Google Patents
Bridge plug with large drift diameter Download PDFInfo
- Publication number
- CN104612626A CN104612626A CN201510071569.1A CN201510071569A CN104612626A CN 104612626 A CN104612626 A CN 104612626A CN 201510071569 A CN201510071569 A CN 201510071569A CN 104612626 A CN104612626 A CN 104612626A
- Authority
- CN
- China
- Prior art keywords
- central tube
- lock ring
- bridging plug
- big orifice
- cone
- 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
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 8
- 238000012856 packing Methods 0.000 claims description 20
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007704 transition Effects 0.000 abstract 3
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 3
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
A bridge plug with the large drift diameter comprises a sleeve, a central tube, a rubber sleeve, an upper cone and a lower cone. The rubber sleeve sleeves the central tube on the outer wall, the upper cone and the lower cone are respectively arranged at two ends of the rubber sleeve, and the section of the top of the upper cone and the section of the bottom of the lower cone are conical and are respectively wedged into gaps of the upper and lower slips and the central tube. The bridge plug is characterized in that the upper portion of the inner wall of the central tube is provided with a transition section with the inner diameter shrinking from top to bottom, the section of the transition section is a conical surface with the conicity ranging from 12 degrees to 13 degrees, the diameter of one section of the central tube with smaller diameter is not less than 70mm, and a dissolvable ball is arranged at the position of the transition section. The bridge plug has the advantages that drill-grinding is omitted, the dissolvable ball can be completely dissolved by injecting electrolyte solution, and the large drift diameter of the bridge plug is reserved for subsequent production use.
Description
Technical field
The present invention relates to a kind of oil drilling and extracting equipment, particularly a kind of big orifice bridging plug.
Background technology
Current, the separate stratum fracfturing of unconventionaloil pool exploitation is mainly based on the staged fracturing of composite material bridging plug, but composite bridge plug sets after perforating and fracturing completes, and the later stage needs disposable brill to grind, still consuming time; Simultaneously along with the degree of depth of unconventionaloil pool exploitation increases, particularly in ultradeep well or inclined shaft, the difficulty utilizing continuous tubing drill to grind is increasing, is therefore badly in need of will developing a kind of bridging plug not needing to bore mill, for staged fracturing of horizontal well.
Summary of the invention
The object of the present invention is to provide a kind of big orifice bridging plug, he, without the need to boring mill, only need inject electrolyte solution and just solubilized ball can be dissolved completely, leave the big orifice of bridging plug for subsequent production.
The technical scheme realizing the object of the invention is: a kind of big orifice bridging plug, comprise sleeve pipe, central tube, be placed on the packing element on central tube outer wall and be arranged in the upper of packing element two ends, lower cone, the top of described upper cone and its cross section, the bottom of lower cone are taper, respectively in wedging, in space between lower slips and central tube, it is characterized in that: the top of described central tube inwall has reducer, its internal diameter from top to bottom reduces, the cross section of this reducer is the conical surface that tapering is 12 ~ 30 °, one section of its diameter that this central tube diameter is less is not less than 70mm, solubilized ball is had to be placed in this reducer place.
And the described withstand voltage 40 ~ 100MPa of solubilized ball, heatproof 100 ~ 200 DEG C also can be dissolved by electrolyte solution.
And the thermoplastic polymer that described solubilized ball is polymerized by almag, water-soluble di acid and dihydroxylic alcohols is made.
And the top of described upper slips is provided with lock ring cover, this lock ring cover is placed on lock ring and is also threaded with it, the inside and outside wall of described lock ring is buttless thread structure, buttless thread on this lock ring inwall matches with the buttless thread on central tube outer wall, and its outer wall thread pitch of this lock ring is greater than inner thread pitch.
And the bottom of described lower slips is provided with guide shoe, the inwall of this guide shoe starts inwardly to tighten up in the lower edge of central tube, and this guide shoe inwall also has trapezoidal thread.
And all there is back band between described packing element and upper/lower cone, this back band is made up of upper and lower back band, is connected between described upper and lower back band by volume skin pin.
And be provided with round section joint ring between described packing element and central tube, hold to stay and be located on this round section joint ring.
And described central tube tube wall upper end has shear pin nail.
And described lock ring cover is connected with central tube by starting pin, this lock ring cover is also connected with lock ring by tightening pin.
And described upper cone is connected with central tube by the second shear pin, described lower cone is connected with sleeve pipe by the 3rd shear pin.
The invention has the advantages that: he, without the need to boring mill, only need inject electrolyte solution and just solubilized ball can be dissolved completely, leave the big orifice of bridging plug for subsequent production; In bridging plug, latus rectum is large, meets the continuous oil pipe operation of general requirements; When needing to bore mill bridging plug under special operation condition, also can be bored and be ground off, applied widely.
Accompanying drawing explanation
Fig. 1 is the structural representation of big orifice bridging plug.
Detailed description of the invention
See Fig. 1, below with reference to embodiment, the present invention will be further described.
A kind of big orifice bridging plug, comprise sleeve pipe 23, central tube 3, be placed on the packing element 15 on central tube 3 outer wall and be arranged in the upper of packing element 15 two ends, lower cone 9, 18, the top of described upper cone 9 and its cross section, bottom of lower cone 18 are taper, respectively in wedging, lower slips 8, in space between 19 and central tube 3, it is characterized in that: the top of described central tube 3 inwall has reducer, its internal diameter from top to bottom reduces, the cross section of this reducer is the conical surface that tapering is 12 ~ 30 °, one section of its diameter that this central tube diameter is less is not less than 70mm, solubilized ball 2 is had to be placed in this reducer place.
When needs are to bridging plug top payzone pressure break, send solubilized ball 2 to the reducer place on central tube 3 top, after sealing, carry out pressure break.After measure completes, add certain density electrolyte solution in displacement fluid, solubilized ball 2 will dissolve within the regular hour, leave the big orifice of bridging plug for subsequent production.
And the described withstand voltage 40 ~ 100MPa of solubilized ball 2, heatproof 100 ~ 200 DEG C also can be dissolved by electrolyte solution.
And the thermoplastic polymer that described solubilized ball 2 is polymerized by almag, water-soluble di acid and dihydroxylic alcohols is made.
Further technical scheme can be that the top of described upper slips 8 is provided with lock ring cover 5, this lock ring cover 5 is placed on lock ring 7 and is also threaded with it, the inside and outside wall of described lock ring 7 is buttless thread structure, buttless thread on this lock ring 7 inwall matches with the buttless thread on central tube 3 outer wall, and its outer wall thread pitch of this lock ring 7 is greater than inner thread pitch.
The outer wall thread that lock ring cover 5 and lock ring 7 match sets when generation moves axially relative displacement can not occur at bridging plug, and the internal thread that central tube 3 and lock ring 7 match then unidirectional irreversible upstream displacement can occur.Buttless thread on lock ring 7 inwall matches with the buttless thread on central tube 3 outer wall, and lock ring 7 just can be locked on central tube 3, keeps pressing down load and prevents resilience.
And the bottom of described lower slips 19 is provided with guide shoe 21, the inwall of this guide shoe 21 starts inwardly to tighten up in the lower edge of central tube 3, and this guide shoe 21 inwall also has trapezoidal thread.
This guide shoe 21 is for supporting lower slips 19.
And described upper cone 9 is connected with central tube 3 by the second shear pin 10, described lower cone 18 is connected with sleeve pipe 23 by the 3rd shear pin 22.
And all there is back band between described packing element 15 and upper/lower cone 9,18, this back band is made up of upper and lower back band 11,13, is connected between described upper and lower back band 11,13 by volume skin pin 12.
This back band is used for fixing packing element 15.
Further technical scheme also can be provided with round section joint ring 17 between described packing element 15 and central tube 3, holds and stays ring 16 to be placed on this round section joint ring 17.
This holds the gap staying ring 16 and round section joint ring 17 to seal packing element 15 and central tube 3 further when packing element 15 pressure-bearing.
And described central tube 3 tube wall upper end has shear pin nail 1.
Bridging plug is connected with setting tool by the shear pin be arranged in shear pin nail 1, and when shearing force reaches setting value during work, this shear pin is cut off, and setting tool and bridging plug are slipped out of the hand.
Further technical scheme can also be that described lock ring cover 5 is connected with central tube 3 by starting pin 4, and this lock ring cover 5 is also connected with lock ring 7 by tightening pin 6.
And described upper cone 9 is connected with central tube 3 by the second shear pin 10, described lower cone 18 is connected with sleeve pipe 23 by the 3rd shear pin 22.
Second shear pin 10 is for fixing upper cone 9, and when shearing force reaches setting value, this second shear pin 10 is cut off, and upper cone 9 just can move in the axial direction.
3rd shear pin 22 is for connecting lower cone 18 and central tube 3, and when shearing force reaches setting value, the 3rd shear pin 22 is cut off, release lower cone 18.
embodiment
After being pumped into predetermined level, cable is lighted a fire, cable setting tool transmitting thrust is on setting sleeve, setting sleeve promotes lock ring cover 5, cut off and start pin 4, lock ring cover 5 drives lock ring 7 simultaneously descending, lock ring 7 is locked on central tube 3 step by step, keep pressing down load and prevent resilience, the upper slips 8 of lock ring cover 5 promotion is simultaneously descending, it is descending that upper slips 8 promotes upper cone 9, cut off the shear pin 10 in cone 9, under the effect of axial force, the outer back band 11 of the descending extruding of upper cone 9 and interior back band 13, inside and outside back band expands outwardly downwards simultaneously, descending under responsive to axial force while of packing element 15 and packing element shelves ring 14, and with a little blow-up, at the same time, packing element 15 extrudes lower inside and outside back band 11 and 13 and packing element shelves ring 14, lower cone 18, after lower cone 18 reaches certain force value, the 3rd shear pin 22 on it is cut off, above-mentioned parts continue to extrude lower slips 19 simultaneously, lower slips 19 is under the support of guide shoe 21, reaching lower slips 19 breaks after force value, lower slips 19 outwards movement, occlusion sleeve pipe 23, packing element 15 blow-up, Sealed casing pipe 23, upper slips 8 breaks and outwards moves occlusion sleeve pipe 23, lock ring cover 5 drives lock ring 7 to be locked on central tube 3 simultaneously, after reaching the force value of the shear pin 1 on central tube 3, setting tool and bridging plug are slipped out of the hand, complete and set.When needs are to bridging plug top payzone pressure break, send solubilized ball 2 to the reducer place on central tube 3 top, after sealing, carry out pressure break.After measure completes, add certain density electrolyte solution in displacement fluid, solubilized ball 2 will dissolve within the regular hour, leave the big orifice of bridging plug for subsequent production.
The present invention is in the utility model patent with regard to same subject application on the same day.
Claims (10)
1. a big orifice bridging plug, comprise sleeve pipe, central tube, be placed on the packing element on central tube outer wall and be arranged in the upper of packing element two ends, lower cone, the top of described upper cone and its cross section, the bottom of lower cone are taper, respectively in wedging, in space between lower slips and central tube, it is characterized in that: the top of described central tube inwall has reducer, its internal diameter from top to bottom reduces, the cross section of this reducer is the conical surface that tapering is 12 ~ 30 °, one section of its diameter that this central tube diameter is less is not less than 70mm, solubilized ball is had to be placed in this reducer place.
2. a kind of big orifice bridging plug according to claim 1, is characterized in that: the described withstand voltage 40 ~ 100MPa of solubilized ball, and heatproof 100 ~ 200 DEG C also can be dissolved by electrolyte solution.
3. a kind of big orifice bridging plug according to claim 2, is characterized in that: the thermoplastic polymer that described solubilized ball is polymerized by almag, water-soluble di acid and dihydroxylic alcohols is made.
4. a kind of big orifice bridging plug according to claim 1, it is characterized in that: the top of described upper slips is provided with lock ring cover, this lock ring cover is placed on lock ring and is also threaded with it, the inside and outside wall of described lock ring is buttless thread structure, buttless thread on this lock ring inwall matches with the buttless thread on central tube outer wall, and its outer wall thread pitch of this lock ring is greater than inner thread pitch.
5. a kind of big orifice bridging plug according to claim 1, is characterized in that: the bottom of described lower slips is provided with guide shoe, and the inwall of this guide shoe starts inwardly to tighten up in the lower edge of central tube, and this guide shoe inwall also has trapezoidal thread.
6. a kind of big orifice bridging plug according to claim 1, it is characterized in that: all have back band between described packing element and upper/lower cone, this back band is made up of upper and lower back band, is connected between described upper and lower back band by volume skin pin.
7. a kind of big orifice bridging plug according to claim 1, is characterized in that: be provided with round section joint ring between described packing element and central tube, holds to stay to be located on this round section joint ring.
8. a kind of big orifice bridging plug according to claim 1, is characterized in that: described central tube tube wall upper end has shear pin nail.
9. a kind of big orifice bridging plug according to claim 1, is characterized in that: described lock ring cover is connected with central tube by starting pin, and this lock ring cover is also connected with lock ring by tightening pin.
10. a kind of big orifice bridging plug according to claim 1, is characterized in that: described upper cone is connected with central tube by the second shear pin, and described lower cone is connected with sleeve pipe by the 3rd shear pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510071569.1A CN104612626A (en) | 2015-02-11 | 2015-02-11 | Bridge plug with large drift diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510071569.1A CN104612626A (en) | 2015-02-11 | 2015-02-11 | Bridge plug with large drift diameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104612626A true CN104612626A (en) | 2015-05-13 |
Family
ID=53147251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510071569.1A Pending CN104612626A (en) | 2015-02-11 | 2015-02-11 | Bridge plug with large drift diameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104612626A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989317A (en) * | 2015-06-16 | 2015-10-21 | 中国石油天然气股份有限公司 | Bridge plug for casing fracturing |
| CN105484700A (en) * | 2015-12-07 | 2016-04-13 | 中国石油天然气股份有限公司 | Large-drift-diameter quick drilling bridge plug for fracturing |
| CN105971557A (en) * | 2016-07-08 | 2016-09-28 | 四川省贝特石油技术有限公司 | Completely-dissolvable bridge plug |
| CN106285557A (en) * | 2015-06-05 | 2017-01-04 | 中国石油天然气股份有限公司 | Bridge plug |
| CN106894787A (en) * | 2017-03-06 | 2017-06-27 | 四机赛瓦石油钻采设备有限公司 | A kind of single deck tape-recorder watt big orifice bridging plug and its set method |
| CN107724995A (en) * | 2017-11-28 | 2018-02-23 | 西安石油大学 | A kind of mechanical-set half dissolving bridging device and its fracturing process |
| CN108194025A (en) * | 2017-11-08 | 2018-06-22 | 中国石油天然气股份有限公司 | Method for lowering oil pipe of gas well without killing well |
| CN108222881A (en) * | 2017-11-08 | 2018-06-29 | 中国石油天然气股份有限公司 | Dissolvable bridge plug and preparation method of material thereof |
| CN109899028A (en) * | 2019-04-26 | 2019-06-18 | 天津市玛特瑞科技有限公司 | A kind of solvable bridge plug |
| US11313192B2 (en) | 2017-11-08 | 2022-04-26 | Petrochina Company Ltd. | Method for lowering oil pipe in gas well without well-killing, soluble bridge plug and material preparation method thereof |
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| US20070074873A1 (en) * | 2004-12-21 | 2007-04-05 | Mckeachnie W J | Wellbore tool with disintegratable components |
| CN202560158U (en) * | 2012-05-18 | 2012-11-28 | 中国石油天然气股份有限公司 | Drillable Composite Bridge Plug |
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| US20140076571A1 (en) * | 2008-12-23 | 2014-03-20 | W. Lynn Frazier | Downhole tools having non-toxic degradable elements |
| CN203515462U (en) * | 2013-10-18 | 2014-04-02 | 中国石油化工股份有限公司 | Composite bridge plug and central pipe thereof |
| CN204113212U (en) * | 2014-10-11 | 2015-01-21 | 中国石油天然气股份有限公司 | Composite bridge plug |
| CN204677158U (en) * | 2015-02-11 | 2015-09-30 | 四机赛瓦石油钻采设备有限公司 | A kind of big orifice bridging plug |
-
2015
- 2015-02-11 CN CN201510071569.1A patent/CN104612626A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070074873A1 (en) * | 2004-12-21 | 2007-04-05 | Mckeachnie W J | Wellbore tool with disintegratable components |
| US20140076571A1 (en) * | 2008-12-23 | 2014-03-20 | W. Lynn Frazier | Downhole tools having non-toxic degradable elements |
| CN202560158U (en) * | 2012-05-18 | 2012-11-28 | 中国石油天然气股份有限公司 | Drillable Composite Bridge Plug |
| 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 |
| CN103195389A (en) * | 2013-04-19 | 2013-07-10 | 四机赛瓦石油钻采设备有限公司 | Suspension packer for open hole well completion |
| CN203515462U (en) * | 2013-10-18 | 2014-04-02 | 中国石油化工股份有限公司 | Composite bridge plug and central pipe thereof |
| CN204113212U (en) * | 2014-10-11 | 2015-01-21 | 中国石油天然气股份有限公司 | Composite bridge plug |
| CN204677158U (en) * | 2015-02-11 | 2015-09-30 | 四机赛瓦石油钻采设备有限公司 | A kind of big orifice bridging plug |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285557A (en) * | 2015-06-05 | 2017-01-04 | 中国石油天然气股份有限公司 | Bridge plug |
| CN104989317A (en) * | 2015-06-16 | 2015-10-21 | 中国石油天然气股份有限公司 | Bridge plug for casing fracturing |
| CN105484700A (en) * | 2015-12-07 | 2016-04-13 | 中国石油天然气股份有限公司 | Large-drift-diameter quick drilling bridge plug for fracturing |
| CN105971557A (en) * | 2016-07-08 | 2016-09-28 | 四川省贝特石油技术有限公司 | Completely-dissolvable bridge plug |
| CN106894787A (en) * | 2017-03-06 | 2017-06-27 | 四机赛瓦石油钻采设备有限公司 | A kind of single deck tape-recorder watt big orifice bridging plug and its set method |
| CN108194025A (en) * | 2017-11-08 | 2018-06-22 | 中国石油天然气股份有限公司 | Method for lowering oil pipe of gas well without killing well |
| CN108222881A (en) * | 2017-11-08 | 2018-06-29 | 中国石油天然气股份有限公司 | Dissolvable bridge plug and preparation method of material thereof |
| CN108222881B (en) * | 2017-11-08 | 2021-08-03 | 中国石油天然气股份有限公司 | Dissolvable bridge plug and preparation method of material thereof |
| CN108194025B (en) * | 2017-11-08 | 2021-08-03 | 中国石油天然气股份有限公司 | Method for lowering oil pipe of gas well without killing well |
| US11313192B2 (en) | 2017-11-08 | 2022-04-26 | Petrochina Company Ltd. | Method for lowering oil pipe in gas well without well-killing, soluble bridge plug and material preparation method thereof |
| CN107724995A (en) * | 2017-11-28 | 2018-02-23 | 西安石油大学 | A kind of mechanical-set half dissolving bridging device and its fracturing process |
| CN109899028A (en) * | 2019-04-26 | 2019-06-18 | 天津市玛特瑞科技有限公司 | A kind of solvable bridge plug |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150513 |
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| RJ01 | Rejection of invention patent application after publication |