CN204113212U - Composite bridge plug - Google Patents
Composite bridge plug Download PDFInfo
- Publication number
- CN204113212U CN204113212U CN201420587535.9U CN201420587535U CN204113212U CN 204113212 U CN204113212 U CN 204113212U CN 201420587535 U CN201420587535 U CN 201420587535U CN 204113212 U CN204113212 U CN 204113212U
- Authority
- CN
- China
- Prior art keywords
- supporter
- ball seat
- brambles
- ring
- pole
- 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.)
- Withdrawn - After Issue
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- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000012856 packing Methods 0.000 claims abstract description 25
- 241001092459 Rubus Species 0.000 claims description 34
- 235000017848 Rubus fruticosus Nutrition 0.000 claims description 34
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Landscapes
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The utility model discloses a composite bridge plug, which belongs to the technical field of underground plugging tools of oil and gas fields, and comprises a ball seat, a rubber cylinder, a supporting body, slips, a releasing pin, a lower joint and a soluble fracturing ball, wherein one end of a central rod is provided with threads, and the other end of the central rod is connected with the lower joint through the releasing pin; the ball seat, the supporter, the lower clutch suit is on well core rod in proper order, the ball seat is connected with the one end of supporter, the one end that the ball seat is close to well core rod screw thread end is provided with the indent curved surface that matches with soluble fracturing ball, the one end that the ball seat is connected with the supporter is the toper, the ball seat has the packing element with the junction overcoat of supporter, be equipped with conflict portion on the supporter, the packing element presss from both sides and locates between conflict portion and the ball seat, the supporter is the toper and is connected with the lower clutch with the one end that the ball seat is not connected, the supporter be conical one. After the fracturing and acidizing construction operation, the fracturing ball is dissolved without drilling and removing a bridge plug, and the on-site liquid drainage and production can be realized.
Description
Technical field
The utility model relates to oil gas field down-hole plugging technical field of tools, particularly a kind of composite bridge plug.
Background technology
Shale gas is the very important unconventional gas resource of one exploiting out from rammell, for the industrialization realizing shale gas breaks through, focuses on technology such as geological selection area evaluation, RESERVOIR RECOGNITION, staged fracturing of horizontal well transformations as breach; The exploitation of following shale gas is mainly leaned on slimhole drilling and the engineering cost of barefoot completion reduction in advance, by staged fracturing of horizontal well technology raising well yield, the development mode extending the Oil/gas Well production cycle by long horizontal sections horizontal well, is finally realized the benefit exploitation of shale gas.
At present, there is a kind of composite bridge plug that uses in fracturing technique and coordinate the mode of carrying out staged fracturing, composite bridge plug is sent to behind precalculated position through running tool and is set by setting tool; Set and rear fracture acidizing construction carried out to current target zone, after having constructed can under enter another composite bridge plug, shutoff is carried out to a upper target zone.After fracture acidizing at different levels has been constructed, need to carry brill milling tool by coiled tubing and composite bridge plug brill at different levels has been removed, entered flow string under ability and normally produce.
But realizing in process of the present utility model, inventor finds that prior art at least exists following problem:
Along with the degree of depth of shale gas development well increase, horizontal segment increase, after pressure break, acidizing treatment operation, because the length of coiled tubing limits, can not complete and more than the development well of 5000m, construction operation is carried out to well depth, and can self-locking be there is in coiled tubing after horizontal segment is traveled beyond 1500m, can not move on, and then cause coiled tubing not bore except bridging plug by drill guide milling tool, follow-up normal production cannot be realized, therefore, existing composite bridge plug existence is difficult to bore the risk removed, and existing composite bridge plug part is more, complex structure, cost are higher.
Utility model content
In order to solve the problem of prior art, the utility model embodiment provides a kind of composite bridge plug, and technical scheme is as follows:
The utility model embodiment provides a kind of composite bridge plug, is applicable to coordinate center-pole to carry out shutoff to Oil/gas Well, and described bridging plug comprises ball seat, packing element, supporter, slips, pin of giving up, lower contact and solubility pressure break ball,
One end of described center-pole is provided with screw thread, and pin of giving up described in the other end of described center-pole passes through is connected with described lower contact, described ball seat, supporter, lower contact is sleeved on described center-pole successively, described ball seat is connected with one end of described supporter, described ball seat is provided with the inner sunken face mated with described solubility pressure break ball near one end of the described center-pole end of thread, one end that described ball seat is connected with described supporter is tapered, the junction overcoat of described ball seat and described supporter has described packing element, described supporter is provided with contact part, described packing element is located between described contact part and described ball seat, one end that described supporter is not connected with described ball seat is tapered and be connected with described lower contact, tapered one end and the described slips of described supporter cooperatively interact, make when described ball seat moves and then drive described supporter to move, described slips is softened.
Further, the support portion that described supporter comprises cylindrical shell and is coaxially connected with described cylindrical shell, the junction of described support portion and described cylindrical shell forms described contact part, and the outer wall of the other end of described support portion is tapered.
Further, described bridging plug also comprises wrister, and described wrister and described packing element mate and be connected and the contact part place be tight against at described supporter.
Further, the first brambles ring is used to be connected between described ball seat with described supporter, described first brambles ring coupling is fixed on the inner side of the tapered one end of described ball seat, with the brambles tooth of the described ball seat single-way moving of multiple restriction in the ring of described first brambles ring.
Further, the second brambles ring is used to be connected between described supporter with described lower contact, described second brambles ring coupling is fixed on the inner side of the tapered one end of described supporter, with the brambles tooth of the described supporter single-way moving of multiple restriction in the ring of described second brambles ring.
Further, one end of described center-pole is disposed radially multiple pin hole for pin of giving up described in plug-in mounting.
Further, the diameter for the passage being set with described center-pole that the inside of described ball seat, supporter and lower contact is formed is more than or equal to 50mm.
Preferably, described bridging plug is suitable for coupling 114.3mm, 127mm and 139.7mm sleeve pipe.
The beneficial effect of the technical scheme that the utility model embodiment provides is:
Connect successively by using ball seat, supporter and lower contact and be socketed on center-pole, when using special tool to apply pressure to ball seat, can expand gradually at the effect lower rubber cylinder of ball seat tapering point power and carry out sealing, the stressed effect of the tapering point of supporter also can strut slips and carry out grappling to bridging plug entirety, giving up, because outer active force is excessive, after being cut off, center-pole can be drawn out pin; Ball seat place can drop into solubility pressure break ball and assist shutoff, due to the passage for being set with center-pole that the inside of ball seat, supporter and lower contact is formed, after pressure break, acidizing treatment operation, dissolve solubility pressure break ball and need not bore except bridging plug just can realize on-the-spot discharge opeing and production; Meanwhile, the utility model provide bridging plug simple and ingenious structure, reduce cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of composite bridge plug that the utility model embodiment provides.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Embodiment
See Fig. 1, the utility model embodiment provides a kind of composite bridge plug, be applicable to coordinate center-pole 1 pair of Oil/gas Well to carry out shutoff, this bridging plug comprises ball seat 2, packing element 3, supporter 4, slips 5, pin 6 of giving up, lower contact 7 and solubility pressure break ball (not shown), one end of center-pole 1 is provided with screw thread, and the other end of center-pole 1 is connected with lower contact 7 by pin 6 of giving up, ball seat 2, supporter 4 and lower contact 7 are sleeved on center-pole 1 successively, ball seat 2 is connected with one end of supporter 4, ball seat 2 is provided with the inner sunken face 2a mated with solubility pressure break ball near one end of center-pole 1 end of thread, one end that ball seat 2 is connected with supporter 4 is tapered, ball seat 2 has packing element 3 with the junction overcoat of supporter 4, supporter 4 is provided with contact part 4c, packing element sandwiched and between contact part 4c and ball seat 2, the other end (one end be not namely connected with ball seat 2) of supporter 4 is tapered and be connected with lower contact 7, tapered one end and the slips 5 of supporter 4 cooperatively interact, make when ball seat 2 moves and then drive supporter 4 to move, slips 5 is softened.
Particularly, the end of thread of center-pole 1 is generally connected with special running tool, under when entering bridging plug center-pole 1 one end with pin hole be connected and fixed with lower contact by pin 6 of giving up, center-pole 1 entirety is through ball seat 2, supporter 4 and lower contact 7, and now center-pole 1 is the temporary carrier of bridging plug; Special tool can be used during sealing to apply pressure to ball seat 2 upper end, ball seat 2 can slide and move down on center-pole 1 under pressure, because ball seat 2 lower end is tapered, the packing element 3 of ball seat 2 tapering point overcoat can be made when ball seat 2 moves down to expand, packing element 3 can be anchored on current target zone after expanding; Because supporter 4 is connected with ball seat 2, supporter 4 can be driven when ball seat 2 moves down to slide on center-pole 1 move down, slips 5 is sleeved on the outside of the tapered one end of supporter 4, at the softened sleeve pipe blocked outside outer bridging plug of active force lower slips 5 meeting of supporter 4, bridging plug solid anchor is made to fix on sleeve pipe precalculated position; After bridging plug fastener anchor, when the active force on ball seat 2 is increasing, when the shearing force of pin 6 place centrally bar 1 axial direction of making to give up reaches threshold, pin 6 of giving up is drawn out by center-pole during plane of shear 1, now can enter solubility pressure break ball below in the inner sunken face 2a place of ball seat 2, complete the shutoff to current target zone; The composite bridge plug that the present embodiment provides forms larger-diameter passage in bridging plug inside, and bridging plug overall structure is simply ingenious, has excellent sealing effect and provides cost savings.
After composite bridge plug and solubility pressure break ball sealing block up target zone, the fracture acidizing to current target zone can be implemented, after completing the fracturing reform of current target zone, enter another composite bridge plug and solubility pressure break ball under can continuing and complete shutoff to another target zone, by that analogy, when after the separate stratum fracfturing transformation completing all target zones, need the shutoff removing each layer bridging plug to ensure discharge opeing and the production of the on-the-spot well of pit shaft, grind bridging plug relative to using continuous tubing drill in prior art and get through apocenosis passage, the composite bridge plug that the present embodiment provides only needs the solubility pressure break ball dissolving shutoff, need not bore except bridging plug, ball seat 2 in the middle of bridging plug, the passage that supporter 4 and lower contact 7 are formed can meet discharge opeing and produce, the expense and time of boring mill bridging plug are saved.
Further, the support portion 4b that supporter 4 comprises cylindrical shell 4a and is coaxially connected with cylindrical shell 4a, formation contact part, the junction 4c of support portion 4b and cylindrical shell 4a, the outer wall of the other end of support portion 4b is tapered.This bridging plug also comprises wrister 10, and wrister 10 and packing element 3 mate and be connected and the 4c place, contact part be tight against at supporter 4.
Particularly, one end of supporter 4 is cylindrical shell 4a, and middle part is support portion 4b, contact part 4c is formed between cylindrical shell 4a and support portion 4b, the tapered one end of supporter 4b is used for overcoat slips 5, and slips 5 is sleeved on the conical surface 4d of supporter 4, and when supporter 4 moves, slips 5 can be softened; One end of wrister 10 to be set on cylindrical shell 4a and to be tight against at 4c place, contact part; one end that packing element 3 contacts with ball seat 2 is provided with the inner groovy 3a of taper; the outer wall of the other end of packing element 3 is tapered; the tapered one end of packing element 3 is mated with wrister 10 and is socketed; wrister 10 is quality of rubber materials identical with packing element 3; wrister 10 can prevent packing element 3 one end under the active force of ball seat 2 from pursing up, and while packing element 3 being played to well support and protective effect, also strengthens the sealing effect of packing element 3.
Further, the first brambles ring 8 is used to be connected between ball seat 2 with supporter 4, first brambles ring 8 coupling is fixed on the inner side of the tapered one end of ball seat 2, with the brambles tooth (not shown) of multiple restriction ball seat 2 single-way moving in the ring of the first brambles ring 8.
Particularly, in a kind of implementation of the present embodiment, in gear-like outside the ring of the first brambles ring 8, ball seat 2 is provided with the groove mated with the first brambles ring 8, surface in the ring of the first brambles ring 8 is evenly distributed with multiple brambles tooth, brambles tooth limits ball seat 2 can only single-way moving, oppositely mobile after can preventing ball seat 2 from strutting packing element 3, ensure that the sealing effectiveness of packing element 3.
Further, supporter 4 is connected with using the second brambles ring 9 between lower contact, second brambles ring 9 coupling is fixed on the inner side of the tapered one end of supporter 4, with the brambles tooth (not shown) of multiple restriction supporter 4 single-way moving in the ring of the second brambles ring 9.
Particularly, in a kind of implementation of the present embodiment, in gear-like outside the ring of the second brambles ring 9, supporter 4 is provided with the groove mated with the second brambles ring 9, surface in the ring of the second brambles ring 9 is evenly distributed with multiple brambles tooth, brambles tooth limits supporter 4 can only single-way moving, and oppositely mobile after can preventing supporter 4 from strutting slips 5, auxiliary slips 5 strengthens anchoring effect.
Further, one end of center-pole 1 is disposed radially the pin hole 11 of multiple pin 6 of giving up for plug-in mounting.
Particularly, the pin 6 of giving up that multiple pin hole 11 is convenient to by demand plug-in mounting varying number is set, can according to the regulating and controlling of quantities of pin 6 of giving up to predetermined shearing force.
Further, the diameter for the passage being set with center-pole 1 that the inside of ball seat 2, supporter 4 and lower contact 7 is formed is more than or equal to 50mm.
Particularly, the latus rectum of existing conventional composite bridge plug is generally less than 30mm, have impact on on-the-spot discharge opeing and production, the latus rectum that the ball seat 2 of the composite bridge plug that the present embodiment provides, supporter 4 and lower contact inside are formed is more than or equal to 50mm, after dissolving away solubility pressure break ball, on-the-spot discharge opeing and production can be met when not boring mill bridging plug.
Preferably, the bridging plug that the utility model embodiment provides is suitable for coupling 114.3mm, 127mm and 139.7mm sleeve pipe.
Preferably, the working pressure class of the bridging plug that the utility model embodiment provides is 0-70MPa, and the operating temperature grade of bridging plug is 0-120 DEG C.
The composite bridge plug that the utility model embodiment provides, connect successively by using ball seat, supporter and lower contact and be socketed on center-pole, when using special tool to apply pressure to ball seat, can expand gradually at the effect lower rubber cylinder of ball seat tapering point power and carry out sealing, the stressed effect of the tapering point of supporter also can strut slips and carry out grappling to bridging plug entirety, giving up, because outer active force is excessive, after being cut off, center-pole can be drawn out pin; Ball seat place can drop into solubility pressure break ball and assist shutoff, due to the passage for being set with center-pole that the inside of ball seat, supporter and lower contact is formed, after pressure break, acidizing treatment operation, dissolve solubility pressure break ball and need not bore except bridging plug just can realize on-the-spot discharge opeing and production; Meanwhile, the utility model provide bridging plug simple and ingenious structure, reduce cost.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. a composite bridge plug, be applicable to coordinate center-pole to carry out shutoff to Oil/gas Well, it is characterized in that, described bridging plug comprises ball seat, packing element, supporter, slips, pin of giving up, lower contact and solubility pressure break ball,
One end of described center-pole is provided with screw thread, and pin of giving up described in the other end of described center-pole passes through is connected with described lower contact, described ball seat, supporter, lower contact is sleeved on described center-pole successively, described ball seat is connected with one end of described supporter, described ball seat is provided with the inner sunken face mated with described solubility pressure break ball near one end of the described center-pole end of thread, one end that described ball seat is connected with described supporter is tapered, the junction overcoat of described ball seat and described supporter has described packing element, described supporter is provided with contact part, described packing element is located between described contact part and described ball seat, one end that described supporter is not connected with described ball seat is tapered and be connected with described lower contact, tapered one end and the described slips of described supporter cooperatively interact, make when described ball seat moves and then drive described supporter to move, described slips is softened.
2. bridging plug according to claim 1, is characterized in that, the support portion that described supporter comprises cylindrical shell and is coaxially connected with described cylindrical shell, and the junction of described support portion and described cylindrical shell forms described contact part, and the outer wall of the other end of described support portion is tapered.
3. bridging plug according to claim 1, is characterized in that, described bridging plug also comprises wrister, and described wrister and described packing element mate and be connected and the contact part place be tight against at described supporter.
4. bridging plug according to claim 1, it is characterized in that, the first brambles ring is used to be connected between described ball seat with described supporter, described first brambles ring coupling is fixed on the inner side of the tapered one end of described ball seat, with the brambles tooth of the described ball seat single-way moving of multiple restriction in the ring of described first brambles ring.
5. bridging plug according to claim 2, it is characterized in that, the second brambles ring is used to be connected between described supporter with described lower contact, described second brambles ring coupling is fixed on the inner side of the tapered one end of described supporter, with the brambles tooth of the described supporter single-way moving of multiple restriction in the ring of described second brambles ring.
6. bridging plug according to claim 1, is characterized in that, one end of described center-pole is disposed radially multiple pin hole for pin of giving up described in plug-in mounting.
7. bridging plug according to claim 1, is characterized in that, the diameter for the passage being set with described center-pole that the inside of described ball seat, supporter and lower contact is formed is more than or equal to 50mm.
8. the bridging plug according to any one of claim 1-7, is characterized in that, described bridging plug is suitable for coupling 114.3mm, 127mm and 139.7mm sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420587535.9U CN204113212U (en) | 2014-10-11 | 2014-10-11 | Composite bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420587535.9U CN204113212U (en) | 2014-10-11 | 2014-10-11 | Composite bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204113212U true CN204113212U (en) | 2015-01-21 |
Family
ID=52330536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420587535.9U Withdrawn - After Issue CN204113212U (en) | 2014-10-11 | 2014-10-11 | Composite bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204113212U (en) |
Cited By (8)
| 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 |
| 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 |
| CN105064953A (en) * | 2015-07-20 | 2015-11-18 | 中国石油集团渤海钻探工程有限公司 | Rapidly degradable bridge plug with degradation-promoting central pipe |
| CN105484698A (en) * | 2014-10-11 | 2016-04-13 | 中国石油天然气股份有限公司 | Composite bridge plug |
| CN105507849A (en) * | 2015-12-31 | 2016-04-20 | 中国石油天然气股份有限公司 | Fracturing is with removing bridge plug certainly |
| CN106285557A (en) * | 2015-06-05 | 2017-01-04 | 中国石油天然气股份有限公司 | Bridge plug |
| CN107288552A (en) * | 2017-08-10 | 2017-10-24 | 西安石油大学 | Bidirectionally limited expansion locking type coiled tubing built-up joint |
| CN109296338A (en) * | 2018-12-07 | 2019-02-01 | 柳江 | A kind of solvable bridge plug of self-decomposition formula |
-
2014
- 2014-10-11 CN CN201420587535.9U patent/CN204113212U/en not_active Withdrawn - After Issue
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484698A (en) * | 2014-10-11 | 2016-04-13 | 中国石油天然气股份有限公司 | Composite bridge plug |
| CN105484698B (en) * | 2014-10-11 | 2018-03-13 | 中国石油天然气股份有限公司 | Composite bridge plug |
| 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 |
| 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 |
| CN105064953A (en) * | 2015-07-20 | 2015-11-18 | 中国石油集团渤海钻探工程有限公司 | Rapidly degradable bridge plug with degradation-promoting central pipe |
| CN105064953B (en) * | 2015-07-20 | 2017-09-05 | 中国石油集团渤海钻探工程有限公司 | With the fast degradation bridging plug for promoting degraded central tube |
| CN105507849A (en) * | 2015-12-31 | 2016-04-20 | 中国石油天然气股份有限公司 | Fracturing is with removing bridge plug certainly |
| CN107288552A (en) * | 2017-08-10 | 2017-10-24 | 西安石油大学 | Bidirectionally limited expansion locking type coiled tubing built-up joint |
| CN107288552B (en) * | 2017-08-10 | 2024-03-12 | 西安石油大学 | Bidirectional limiting expansion locking type coiled tubing combined joint |
| CN109296338A (en) * | 2018-12-07 | 2019-02-01 | 柳江 | A kind of solvable bridge plug of self-decomposition formula |
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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 | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150121 Effective date of abandoning: 20180313 |