CN109812243A - Degradable positioning ball seat is set in a kind of casing - Google Patents
Degradable positioning ball seat is set in a kind of casing Download PDFInfo
- Publication number
- CN109812243A CN109812243A CN201910054285.XA CN201910054285A CN109812243A CN 109812243 A CN109812243 A CN 109812243A CN 201910054285 A CN201910054285 A CN 201910054285A CN 109812243 A CN109812243 A CN 109812243A
- Authority
- CN
- China
- Prior art keywords
- ring
- ball seat
- degradable
- tailstock
- casing
- 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
Landscapes
- Gasket Seals (AREA)
Abstract
The invention discloses degradable positioning ball seat, including center pull rod, variable diameter sealing structure, Mao Ding mechanism and stopping mechanism are set in a kind of casing；Variable diameter sealing structure includes upper cone, sealing ring, O-ring, gasket ring and slips；Mao Ding mechanism includes cone, slips, tailstock and ceramics nail；Stopping mechanism includes cone, tailstock and lock ring；Degradable positioning ball seat of the invention, when realizing the Inter-zonal packing of staged fracturing or having realized well plugging action, it can be dissolved in the liquid such as fracturing fluid, completion fluid, the temperature requirement being completely dissolved need to only be greater than 40 DEG C, 40 DEG C, in 1%KCl solution, degradable casing ball seat loses anchoring effect after assembling in 8 days, and inner metal component is completely dissolved within 12 days.Cold soluble casing ball seat is set in casing, can satisfy the requirement of pressure-bearing in live well, reduces the volume of insoluble material to greatest extent, avoids insoluble material blocking pipeline, meanwhile, workover cost is saved, is increased economic efficiency.
Description
[technical field]
The invention belongs to petroleum works technical field, it is related to setting degradable positioning ball seat in a kind of casing.
[background technique]
Major part oil field in China's has entered exploitation stage intermediary and later stages at present, and oil recovery difficulty is increasing, hole condition is more and more multiple
Miscellaneous, well workover task also becomes more and more heavier；At the same time, the labor intensity of well workover worker is very high, the environmental condition of well workover
Also very severe.So for the labor intensity for improving well workover efficiency, mitigating well workover worker, wellhead equipment mechanization becomes
The Main way of research.
Meanwhile during oil and gas well testing, when carrying out the operation such as multiple zone completion, fracturing technique field, temporary interlayer, need
To use bridge blinding layering tool to carry out Oil-gas Separation, such as: maintenance personal when testing oil/gas well, need with bridge plug or
Positioning ball seat blocks well head packing oil gas to prevent oil/gas well oil spout.
It at least has the following technical problems in the prior art:
Currently, common solvable bridge plug in the operations such as pressure break, closure, dissolution conditions are harsh after the completion of pressing crack construction, dissolution
Object is too many, and packing element volume is difficult to dissolve greatly, therefore the case where dissolving halfway rubber part blocking pit shaft often occurs, gives
Subsequent construction causes great difficulty, and bores the mill row of returning, and labor intensive, material resources are larger during releasing bridge plug, sometimes very
It is difficult to the case where releasing to will appear bridge plug, to cause the economic waste in oil field.
In addition, a small amount of degradable positioning ball seat of drilling well, needs to be pre-placed seating nipple, construction is cumbersome, and can only be
Fixed position is sealed, and causes great difficulty and waste to construction.
[summary of the invention]
It is an object of the invention to solve composite bridge plug in the prior art brill mill is needed to cause to increase operating cost construction wind
Dangerous problem and existing degradable positioning ball seat can only be sealed in fixed position, cumbersome caused manpower and material resources waste of constructing is asked
Topic provides in a kind of casing and sets degradable positioning ball seat.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
Degradable positioning ball seat is set in a kind of casing, comprising:
Center pull rod；
Variable diameter sealing structure, variable diameter sealing structure include upper cone, sealing ring, O-ring, gasket ring and slips；Slips top
Firmly gasket ring, gasket ring transmits the force to sealing ring, sealing ring stress is moved along upper cone inclined-plane, and diameter becomes larger, Zhi Daoyu
O-ring in internal surface of sleeve pipe gluing, sealing annular groove, which is squeezed to be filled between sealing ring and casing wall, plays sealing function；
Mao Ding mechanism, Mao Ding mechanism include cone, slips, tailstock and ceramics nail；Center pull rod pulls tailstock, and tailstock pushes away
Dynamic slips is creeped along cone inclined-plane, is followed closely and is inlayed into casing wall until ceramics, reaches predetermined pull, screw thread pulls, and gives up and has acted
At；
And stopping mechanism, stopping mechanism include cone, tailstock and lock ring；Lock ring is threadedly coupled with tailstock, is locked
Tailstock is mobile in journey, and lock ring is linked together by structure of setting one's teeth on edge with cone tail portion, makes tailstock that can only unidirectionally advance, cannot fall back.
A further improvement of the present invention lies in that:
Slips uses flap-type structure, slides with upper upper cone surface, and spacing is gradually increased.
Sealing ring and gasket ring all use the biggish soluble material of extensibility.
There is rectangle guide groove on tailstock, slips is made to be evenly distributed during locking, all directions uniform force.
The main body of positioning ball seat is made of soluble material.
Soluble material is almag or lithium magnesium alloy materials；Solvent is fracturing fluid or completion fluid.
Solvent temperature >=40 DEG C.
Compared with prior art, the invention has the following advantages:
Degradable positioning ball seat of the invention is realizing the Inter-zonal packing of staged fracturing or is realizing well plugging action
When, can be dissolved in the liquid such as fracturing fluid, completion fluid, the temperature requirement being completely dissolved only need to be greater than 40 DEG C, 40 DEG C,
In 1%KCl solution, degradable casing ball seat loses anchoring effect after assembling in 8 days, and inner metal component is completely dissolved within 12 days.It will
Cold soluble casing ball seat is set in casing, can satisfy the requirement of pressure-bearing in live well, reduces insoluble material to greatest extent
The volume of material avoids insoluble material blocking pipeline, meanwhile, workover cost is saved, is increased economic efficiency.
[Detailed description of the invention]
Fig. 1 is cold soluble bridge plug structural schematic diagram.
Wherein: 1- center pull rod；2- upper cone；3- sealing ring；4-O type circle；5- gasket ring；6- slips；7- garter spring；8- tail
Seat；9- abrasionproof nail；10- ceramics nail；11- lock ring.
[specific embodiment]
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, the embodiment being not all of, and it is not intended to limit range disclosed by the invention.In addition, with
In lower explanation, descriptions of well-known structures and technologies are omitted, obscures concept disclosed by the invention to avoid unnecessary.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment should fall within the scope of the present invention.
The various structural schematic diagrams for disclosing embodiment according to the present invention are shown in the attached drawings.These figures are not in proportion
It draws, wherein some details are magnified for the purpose of clear expression, and some details may be omitted.As shown in the figure
The shape in various regions, layer and relative size, the positional relationship between them out is merely exemplary, in practice may be due to
Manufacturing tolerance or technical restriction and be deviated, and those skilled in the art may be additionally designed as required have not
Similar shape, size, the regions/layers of relative position.
In context disclosed by the invention, when one layer/element is referred to as located at another layer/element "upper", the layer/element
Can may exist intermediate layer/element on another layer/element or between them.In addition, if in a kind of court
One layer/element is located at another layer/element "upper" in, then when turn towards when, the layer/element can be located at another layer/
Element "lower".
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Fig. 1, the degradable positioning ball seat of casing of the present invention, including center pull rod 1, upper cone 2, sealing ring 3, O-ring
4, gasket ring 5, slips 6, garter spring 7, tailstock 8, abrasionproof nail 9, ceramics nail 10, lock ring 11.
Ball seat main body is made of soluble material, and soluble material can be dissolved in response to solvent；The embodiment of the present invention mentions
The degradable ball seat supplied is made by using the magnesium-aluminium alloy material and lithium magnesium alloy for being dissolved in salt water, and by cold soluble ball
Seat is set in casing, be can satisfy the requirement of pressure-bearing in live well, is reduced the volume of insoluble material to greatest extent, avoid not
Molten material blocks pipeline, meanwhile, workover cost is saved, is increased economic efficiency.Soluble material is almag or lithium magnesium alloy
Material.Solvent is fracturing fluid or completion fluid.Solvent temperature >=40 DEG C.The degradable ball seat made of magnesium-aluminium alloy material can be
Electrochemical reaction occurs in aqueous solvent, and then degradable ball seat is dissolved.The degradable ball seat of low temperature can be according to real time need
It wants, passes through the ratio of magnesium elements and Zn-ef ficiency, violent element, ferro element, element silicon, copper and nickel element in allotment magnesium alloy
Obtain different solution rates.Degradable ball seat can pass through magnesium elements and zinc in allotment magnesium alloy according to real time needs
The ratio of element and manganese element obtains different rate of dissolutions.Rate of dissolution is determined according to scene using temperature.The present invention is low
The degradable ball seat that can also be completely dissolved to 40 DEG C, can be setting without preset seating nipple in casing any position.
As shown in Figure 1, being degradable ball socket structure schematic diagram, by upper cone 2, sealing ring 3, O-ring 4, gasket ring 5, slips 6
Form variable diameter sealing structure.Slips 6 withstands gasket ring 5 when work, gasket ring 5 transmit the force to sealing ring 3,3 stress of sealing ring along
2 inclined-plane of upper cone is mobile, and diameter becomes larger, and is squeezed filling until with the O-ring 4 in 3 slot of internal surface of sleeve pipe gluing, sealing ring
Sealing function is played between sealing ring 3 and casing wall, slips 6 uses 8 flap-type structures in this structure, with upper 2 surface of upper cone
Sliding, spacing are gradually increased, and the thrust peptizaiton of slips 6 in sealing ring 3, is increased its intensity, keeps its stress equal by gasket ring 5
Even, sealing ring 3 and gasket ring 5 all use the biggish soluble material of extensibility.Mao Ding mechanism is followed closely by cone, slips 6, tailstock 8, ceramics
10 compositions.When work center pull rod 1 pull tailstock 8, tailstock 8 push slips 6 creep along cone inclined-plane, until ceramics nail 10 inlay into
In casing wall, reach predetermined pull, screw thread pulls, and movement of giving up is completed.There is rectangle guide groove on tailstock 8, is locking slips 6
It is evenly distributed in the process, all directions uniform force, to bear bigger intensity.Stopping mechanism is by cone, tailstock 8,11 groups of lock ring
At.Lock ring 11 is threadedly coupled with tailstock 8, and tailstock 8 is mobile during locking, and lock ring 11 is linked as with cone tail portion by structure of setting one's teeth on edge
One, makes tailstock 8 that can only unidirectionally advance, cannot fall back.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (7)
1. setting degradable positioning ball seat in a kind of casing characterized by comprising
Center pull rod (1)；
Variable diameter sealing structure, variable diameter sealing structure include upper cone (2), sealing ring (3), O-ring (4), gasket ring (5) and slips
(6)；Slips (6) is withstood gasket ring (5), and gasket ring (5) transmits the force to sealing ring (3), sealing ring (3) stress along upper cone (2)
Inclined-plane is mobile, and diameter becomes larger, until be squeezed with the O-ring (4) in internal surface of sleeve pipe gluing, sealing ring (3) slot be filled in it is close
Sealing function is played between seal ring (3) and casing wall；
Mao Ding mechanism, Mao Ding mechanism include cone, slips (6), tailstock (8) and ceramics nail (10)；Center pull rod (1) pulls tail
Seat (8), tailstock (8) push slips (6) to creep along cone inclined-plane, follow closely (10) until ceramics and inlay into casing wall, reach predetermined drawing
Power, screw thread pull, and movement of giving up is completed；
And stopping mechanism, stopping mechanism include cone, tailstock (8) and lock ring (11)；Lock ring (11) and tailstock (8) screw thread connect
It connects, tailstock (8) is mobile during locking, and lock ring (11) is linked together with cone tail portion by structure of setting one's teeth on edge, and makes tailstock (8) can only
It is unidirectional to advance, it cannot fall back.
2. setting degradable positioning ball seat in casing according to claim 1, which is characterized in that slips (6) uses (8) valve
Formula structure, is slided with upper upper cone (2) surface, and spacing is gradually increased.
3. setting degradable positioning ball seat in casing according to claim 1 or 2, which is characterized in that sealing ring (3) and pad
Ring (5) all uses the biggish soluble material of extensibility.
4. setting degradable positioning ball seat in casing according to claim 1, which is characterized in that tailstock has rectangle on (8)
Guide groove makes slips (6) be evenly distributed during locking, all directions uniform force.
5. setting degradable positioning ball seat in casing according to claim 1, which is characterized in that the main body of positioning ball seat by
Soluble material is made.
6. setting degradable positioning ball seat in casing according to claim 5, which is characterized in that soluble material is magnalium
Alloy or lithium magnesium alloy materials；Solvent is fracturing fluid or completion fluid.
7. setting degradable positioning ball seat in casing according to claim 6, which is characterized in that solvent temperature >=40 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054285.XA CN109812243A (en) | 2019-01-21 | 2019-01-21 | Degradable positioning ball seat is set in a kind of casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054285.XA CN109812243A (en) | 2019-01-21 | 2019-01-21 | Degradable positioning ball seat is set in a kind of casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109812243A true CN109812243A (en) | 2019-05-28 |
Family
ID=66603552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910054285.XA Pending CN109812243A (en) | 2019-01-21 | 2019-01-21 | Degradable positioning ball seat is set in a kind of casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109812243A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627764A (en) * | 2019-10-09 | 2021-04-09 | 四川维泰科创石油设备制造有限公司 | All-metal soluble ball seat |
| CN113250649A (en) * | 2020-02-07 | 2021-08-13 | 四川维泰科创石油设备制造有限公司 | Underground plugging system and using method thereof |
| CN114934758A (en) * | 2022-05-30 | 2022-08-23 | 中国石油化工股份有限公司 | Well-flushing temporary plugging tool for fracturing of low-permeability reservoir horizontal well |
| US11634961B2 (en) | 2020-03-03 | 2023-04-25 | Petrochina Company Limited | Metal-based dissolvable ball seat, setting system and setting method |
| EP4139556A4 (en) * | 2020-04-24 | 2024-04-03 | Innovex Downhole Solutions Inc. | Downhole tool with seal ring and slips assembly |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201620812U (en) * | 2010-01-27 | 2010-11-03 | 中国海洋石油总公司 | Novel anchoring insertion seal |
| CN105971578A (en) * | 2016-06-08 | 2016-09-28 | 中国石油天然气股份有限公司 | Anchoring and sealing integrated soluble ball seat for fracturing |
| US20160312555A1 (en) * | 2015-04-23 | 2016-10-27 | Baker Hughes Incorporated | Fracturing tool and backup |
| CN206091931U (en) * | 2016-09-12 | 2017-04-12 | 西安物华巨能爆破器材有限责任公司 | Oil gas is bridging plug support stopping device for well |
| CN108412475A (en) * | 2018-05-11 | 2018-08-17 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of press-fracturing bridge plug |
| US20180266207A1 (en) * | 2012-10-29 | 2018-09-20 | Ccdi Composites, Inc. | Optimized composite downhole tool for well completion |
| CN108716379A (en) * | 2018-07-25 | 2018-10-30 | 百勤能源科技（惠州）有限公司 | A kind of solvable bridge plug of big orifice |
| CN208073422U (en) * | 2018-03-23 | 2018-11-09 | 中国石油天然气集团有限公司 | A kind of cold soluble bridge plug |
| CN208396697U (en) * | 2018-05-11 | 2019-01-18 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of press-fracturing bridge plug |
-
2019
- 2019-01-21 CN CN201910054285.XA patent/CN109812243A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201620812U (en) * | 2010-01-27 | 2010-11-03 | 中国海洋石油总公司 | Novel anchoring insertion seal |
| US20180266207A1 (en) * | 2012-10-29 | 2018-09-20 | Ccdi Composites, Inc. | Optimized composite downhole tool for well completion |
| US20160312555A1 (en) * | 2015-04-23 | 2016-10-27 | Baker Hughes Incorporated | Fracturing tool and backup |
| CN105971578A (en) * | 2016-06-08 | 2016-09-28 | 中国石油天然气股份有限公司 | Anchoring and sealing integrated soluble ball seat for fracturing |
| CN206091931U (en) * | 2016-09-12 | 2017-04-12 | 西安物华巨能爆破器材有限责任公司 | Oil gas is bridging plug support stopping device for well |
| CN208073422U (en) * | 2018-03-23 | 2018-11-09 | 中国石油天然气集团有限公司 | A kind of cold soluble bridge plug |
| CN108412475A (en) * | 2018-05-11 | 2018-08-17 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of press-fracturing bridge plug |
| CN208396697U (en) * | 2018-05-11 | 2019-01-18 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of press-fracturing bridge plug |
| CN108716379A (en) * | 2018-07-25 | 2018-10-30 | 百勤能源科技（惠州）有限公司 | A kind of solvable bridge plug of big orifice |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627764A (en) * | 2019-10-09 | 2021-04-09 | 四川维泰科创石油设备制造有限公司 | All-metal soluble ball seat |
| CN113250649A (en) * | 2020-02-07 | 2021-08-13 | 四川维泰科创石油设备制造有限公司 | Underground plugging system and using method thereof |
| CN113250649B (en) * | 2020-02-07 | 2023-03-14 | 四川维泰科创石油设备制造有限公司 | Underground plugging system and using method thereof |
| US11634961B2 (en) | 2020-03-03 | 2023-04-25 | Petrochina Company Limited | Metal-based dissolvable ball seat, setting system and setting method |
| EP4139556A4 (en) * | 2020-04-24 | 2024-04-03 | Innovex Downhole Solutions Inc. | Downhole tool with seal ring and slips assembly |
| CN114934758A (en) * | 2022-05-30 | 2022-08-23 | 中国石油化工股份有限公司 | Well-flushing temporary plugging tool for fracturing of low-permeability reservoir horizontal well |
| CN114934758B (en) * | 2022-05-30 | 2024-05-17 | 中国石油化工股份有限公司 | Flushing temporary plugging tool for fracturing low-permeability reservoir horizontal well |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109812243A (en) | Degradable positioning ball seat is set in a kind of casing | |
| US8267177B1 (en) | Means for creating field configurable bridge, fracture or soluble insert plugs | |
| CN104612624B (en) | Degradable bridging plug, timing sliding sleeve, fracturing strings and stratum staged fracturing method | |
| CN206987777U (en) | A kind of solvable bridging plug | |
| NL2025927B1 (en) | Expandable metal gas lift mandrel plug | |
| CN111088973A (en) | Multifunctional fracturing well completion pipe string and process for high-temperature and high-pressure oil and gas well | |
| CN108533214A (en) | Degradable alloy and application thereof as single slip type soluble bridge plug | |
| CN105971557A (en) | Completely-dissolvable bridge plug | |
| CN105888638A (en) | Timing sliding sleeve fracturing pipe column | |
| CN110905443A (en) | Soluble metal sealing fracturing bridge plug | |
| CN110552659B (en) | All-metal soluble bridge plug | |
| CN204024594U (en) | Horizontal cementing is used can switch fracturing sliding bush construction pipe string | |
| CN112253044A (en) | High-ductility small-diameter dissolvable bridge plug | |
| CN208073422U (en) | A kind of cold soluble bridge plug | |
| CN110374550A (en) | It is a kind of exempt from perforation toe-end fracturing valve and wellbore casing and stratum establish passage method | |
| CN103061733B (en) | Sleeve valve type fracturing production-increasing tool | |
| CN109138918A (en) | A kind of anchoring type solvable pressure break ball seat and application method entirely | |
| CN211692429U (en) | Multifunctional fracturing well completion pipe string for high-temperature and high-pressure oil and gas well | |
| CN110388197A (en) | Water-jet infinite stages fracturing device and fracturing process | |
| CN204663463U (en) | A kind of pitching segmentation setting fracture packer | |
| CN212774221U (en) | Ball seat for trigger type quick dissolving bridge plug | |
| CN206722800U (en) | A kind of sealing system on solvable bridging plug | |
| CN204716188U (en) | Handling seat sealed type two group sealing machine packer | |
| CN210768699U (en) | Bridge plug without rubber cylinder | |
| CN204024621U (en) | Switch fracturing sliding bush switching tools for horizontal cementing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190528 |