CN204677158U - A kind of big orifice bridging plug - Google Patents
A kind of big orifice bridging plug Download PDFInfo
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- CN204677158U CN204677158U CN201520097395.1U CN201520097395U CN204677158U CN 204677158 U CN204677158 U CN 204677158U CN 201520097395 U CN201520097395 U CN 201520097395U CN 204677158 U CN204677158 U CN 204677158U
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- central tube
- bridging plug
- lock ring
- big orifice
- plug according
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Abstract
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/lower cone at packing element two ends, the top of described upper cone and its cross section, the bottom of lower cone are taper, wedge in the space between upper and lower slips and central tube respectively, 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, has solubilized ball to be placed in this reducer place.Distinctive feature of the present utility model is: 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.
Description
Technical field
The utility model 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.
Utility model content
This
utility modelobject be to provide a kind of big orifice bridging plug, he is without the need to boring mill, and only need inject electrolyte solution just can dissolve solubilized ball completely, leaves the big orifice of bridging plug for subsequent production.
The technical scheme realizing the utility model object 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
The utility model is described further below with reference to embodiment see Fig. 1.
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, 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, packing element blow-up, Sealed casing pipe, upper slips 8 breaks and outwards moves occlusion sleeve pipe, 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, pitching pumping ball 2, on the internal conical surface on central tube top, carries out pressure break after sealing.After measure completes, add certain density electrolyte solution in displacement fluid, solvable ball 2 will dissolve within the regular hour, leave the big orifice of bridging plug for subsequent production.
The utility model is in the patent of invention 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 4, 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 |
|---|---|---|---|
| CN201520097395.1U CN204677158U (en) | 2015-02-11 | 2015-02-11 | A kind of big orifice bridging plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520097395.1U CN204677158U (en) | 2015-02-11 | 2015-02-11 | A kind of big orifice bridging plug |
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| Publication Number | Publication Date |
|---|---|
| CN204677158U true CN204677158U (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520097395.1U Active CN204677158U (en) | 2015-02-11 | 2015-02-11 | A kind of big orifice bridging plug |
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| CN (1) | CN204677158U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612626A (en) * | 2015-02-11 | 2015-05-13 | 四机赛瓦石油钻采设备有限公司 | Bridge plug with large drift diameter |
| CN106481308A (en) * | 2016-12-09 | 2017-03-08 | 中国石油集团西部钻探工程有限公司 | Method is entered under temporary blocking type big orifice bridging plug and production tube |
-
2015
- 2015-02-11 CN CN201520097395.1U patent/CN204677158U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612626A (en) * | 2015-02-11 | 2015-05-13 | 四机赛瓦石油钻采设备有限公司 | Bridge plug with large drift diameter |
| CN106481308A (en) * | 2016-12-09 | 2017-03-08 | 中国石油集团西部钻探工程有限公司 | Method is entered under temporary blocking type big orifice bridging plug and production tube |
| CN106481308B (en) * | 2016-12-09 | 2019-06-14 | 中国石油集团西部钻探工程有限公司 | Production tube tripping in method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |