CN202832369U - Double-stage composite well cementation rubber plug - Google Patents
Double-stage composite well cementation rubber plug Download PDFInfo
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- CN202832369U CN202832369U CN 201220475268 CN201220475268U CN202832369U CN 202832369 U CN202832369 U CN 202832369U CN 201220475268 CN201220475268 CN 201220475268 CN 201220475268 U CN201220475268 U CN 201220475268U CN 202832369 U CN202832369 U CN 202832369U
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Abstract
The utility model discloses a double-stage composite well cementation rubber plug, and aims at overcoming the defects that an existing well cementation rubber plug cannot meet requirements for well cementation through a composite bushing, and a wing of the rubber plug is prone to shear failure. According to the double-stage composite well cementation rubber plug, a colliding press rubber plug of a colliding press rubber plug assembly is mounted at the lower end of a rubber plug body; a connector and a float collar plug are sequentially and fixedly mounted at the lower end, where the colliding press rubber plug is located, of the rubber plug body; a connecting sleeve and a locating sleeve are fixedly mounted at the upper end of the rubber plug body; the locating sleeve, the connecting sleeve and the rubber plug body are fixed in the radial direction through shear pins with different diameters; the locating sleeve is located on a limiting face of the colliding press rubber plug assembly; a rubber plug tail wing, a replacing rubber plug, a locking piece and a connecting plug of a replacing rubber plug assembly are sequentially and fixedly connected from top to bottom; an inserting sealing ring is arranged on the outer circumference of the lower end portion of the locking piece; and the inserting sealing ring is fixedly connected with a connecting sealing ring on the upper end portion of the rubber plug body of the colliding press rubber plug assembly in a matched mode. The double-stage composite well cementation rubber plug has the advantages that a colliding press rubber plug short section and the reducing replacing rubber plug are used in a combined and matched mode, a self-locking sealing structure can be used for realizing permanent sealing inside and outside the composite bushing, and the success rate of construction of the well cementation through the composite bushing is increased.
Description
Technical field
The utility model relates to a kind of oil and gas development engineering well cementing operation device, especially relates to the compound cementing plug of a kind of twin-stage.
Background technology
Conventional solid completion practice default float collar (block ring) when setting of casing, float collar is above to be latus rectum, be used for determining the plug downstream position after the cementing job end, top cement plug in sleeve pipe is pushed up to the back pressure valve place (or meet with bottom plug) by drilling fluid, this moment, pump pressure can raise rapidly, was called " bruising ".Existing plug is many to be formed by rubber and the good framework material sulfuration of drillability, sets up the artificial bottom of a well after the bruising, completion fluid in packing well cementation mud and the well.Such as disclosed Chinese invention patent application on August 8th, 2012 " the compound bruising device of a kind of drilling liner cementing plug " (CN102628347A), the drilling rod plug of this device comprises hold-doun nut, connecting rod, little glue bowl and bowl seat, hold-doun nut, connecting rod, bowl seat, guide head are threaded from top to bottom in turn, connecting rod is set with little glue bowl outward, the bowl seat outside is equipped with fixture block, and the fixture block installed inside has back-moving spring; Tail pipe hollow plug comprises hollow connector, large glue bowl and hollow guiding bowl seat, the hollow connector is designed to hollow, be designed with the fixture block groove that is complementary with fixture block on the hollow connector inwall, hollow connector lower end is threaded with hollow guiding bowl seat, and the hollow connector outside is set with large glue bowl.
The application of composite bushing well cementation in solving complexity, low porosity and low permeability reservoir special well is more and more extensive, casing inner diameter is up big and down small, existing conventional major diameter plug can not satisfy the construction demand, improved minor diameter plug float collar plug diminishes, the plug wing becomes large, and the plug wing is easy to be sheared destruction during by undergauge (reducing) position.Can not the cement paste scraping in the sleeve pipe is clean, and the effect placed in the middle of float collar plug is undesirable, directly affects bruising effect and later stage operation.
The utility model content
Can not satisfy the composite bushing cementing requirements in order to overcome existing cementing plug, the plug wing easily is sheared the deficiency of destruction, and the utility model provides a kind of twin-stage compound cementing plug.
The technical scheme that its technical problem that solves the utility model adopts is: the compound cementing plug of twin-stage comprises the bruising plug, replaces plug, and the bruising plug is fixedly mounted on the middle part of rubber plug body cylindrical, and the rubber plug body endoporus is through hole.The body endoporus of bruising plug assembly is up-small and down-big shoulder hole, and the upper surface of lower end small diameter bore is confined planes; The cylindrical of rubber plug body is up big and down small multidiameter, and the bruising plug is installed on the small diameter shaft of rubber plug body lower end, and the bruising plug lower end of rubber plug body is installed with jointing, float collar plug successively; Radially be installed with successively adapter sleeve, positioning sleeve on the upper end axle journal of rubber plug body; Positioning sleeve, adapter sleeve, rubber plug body are radially fixed by not isometrical shear pin; The upper end of rubber plug body endoporus is for connecting joint ring; Positioning sleeve in positioning sleeve after being fixedly connected with, adapter sleeve, the rubber plug body is sitting on the confined planes of bruising plug assembly body; The bruising plug is arranged in the endoporus of body bottom.The plug empennage, replacement plug, locking member, the attachment plug that replace the plug assembly from top to bottom are fixedly connected sequentially; On the bottom excircle of locking member the insert-seal ring is arranged, the joint ring that is connected of the rubber plug body upper end of insert-seal ring and bruising plug assembly matches and is fixedly connected with.
The bruising plug wing diameter of bruising plug is greater than body lower end diameter of bore.The replacement plug wing that replaces plug is the Reducing rubber plug wing; Replace plug wing diameter greater than bruising plug wing diameter.The replacement plug wing diameter dimension that replaces plug has 2 at least, from the bottom to top by diameter large → little → large → little being arranged in order; The quantity that replaces the adjacent minor diameter replacement plug wing of plug is more than 1 or 1.
The upper end of float collar plug is installed with the bruising joint ring.
The external diameter of the adapter sleeve of bruising plug assembly is less than the minimum diameter of bore of body.Not isometrical shear pin at the diameter between positioning sleeve, the adapter sleeve greater than the diameter between adapter sleeve, the rubber plug body; Adapter sleeve and positioning sleeve radially between lock dog is installed.
Description of drawings
Fig. 1 is the bruising plug assembly structure schematic diagram of the compound cementing plug of the utility model twin-stage.
Fig. 2 is the replacement plug assembly structure schematic diagram of the compound cementing plug of the utility model twin-stage.
Fig. 3 is the schematic diagram behind the compound well cementation rubber plug combination of the utility model twin-stage.
Among the figure: 1. body, 2. positioning sleeve, 3. adapter sleeve, 4. rubber plug body, 5. the bruising plug wing, 6. jointing, 7. bruising joint ring, 8. float collar plug, 9. confined planes, 10. lock dog, 11. the reducing shear pin, 12. connect joint ring, 13. plug empennages, 14. replace the plug wing, 15. locking members, 16. insert-seal rings, 17. attachment plug, 18. bruising plugs, 19. replace plug.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing 1～accompanying drawing 3 and embodiment.But what those skilled in the art should know is that the utility model is not limited to the listed specific embodiment, as long as spirit according to the invention all should be included in protection scope of the present invention.
The compound cementing plug of the utility model twin-stage comprises bruising plug assembly, replaces the plug assembly.
Referring to accompanying drawing 1.Body 1 endoporus of bruising plug assembly is up-small and down-big shoulder hole, and the step of shoulder hole is confined planes 9.
Rubber plug body 4 cylindricals of bruising plug assembly are up big and down small multidiameter, and bruising plug 18 is fixedly mounted on the rubber plug body cylindrical small diameter shaft; Bruising plug 18 lower ends of rubber plug body 4 are installed with jointing 6, float collar plug 8 successively, with bruising plug 18 axial restraints.Rubber plug body 4 endoporus are through hole, and the upper end of endoporus is for connecting joint ring 12.Bruising joint ring 7 is arranged on the cylindrical of float collar plug 8.
Rubber plug body 4 upper end cylindricals are by radially being installed with successively positioning sleeve 2, adapter sleeve 3, and not isometrical shear pin 11 is radially fixing with positioning sleeve 2, adapter sleeve 3, rubber plug body 4; Reducing shear pin 11 diameters at the diameter between positioning sleeve 2, the adapter sleeve 3 greater than the diameter between adapter sleeve 3, the rubber plug body 4.The external diameter of adapter sleeve 3 is less than the minimum diameter of bore of body 1, and positioning sleeve 2 is sitting on the confined planes 9 of rubber plug body 4.In order to prevent cutting off because pressure changes the shear pin mistake that causes between adapter sleeve 3 and the positioning sleeve 4, the radially correspondence position of adapter sleeve 3 and rubber plug body 4 is equipped with lock dog 10 by the lock dog groove in the lock dog groove, adapter sleeve 3, rubber plug body 4 is radially fixing.
Bruising plug 18 is arranged in the endoporus of body 1 bottom; The bruising plug wing 5 diameters of bruising plug 18 are greater than body 1 lower end diameter of bore, and the diameter of the bruising plug wing 5 is than the large 20～30mm of diameter of bore of body 1 usually.
Referring to accompanying drawing 2.The plug empennage 13, replacement plug 19, locking member 15, the attachment plug 17 that replace the plug assembly from top to bottom are fixedly connected sequentially; On the bottom excircle of locking member 15 insert-seal ring 16 is arranged, the joint ring 12 that is connected of rubber plug body 4 upper ends matches and is fixedly connected with in insert-seal ring 16 and the bruising plug assembly, usually joint ring adopts conical ring (also claiming pawl gingival cyst of mucous gland in the newborn lock ring) locking mechanism, increase along with pressure, insert-seal ring 16 be connected joint ring 12 and lock by conical ring, pressure can not separate after disappearing, and forms whole bruising.
The replacement plug wing 14 that replaces plug 19 is the Reducing rubber plug wing.Usually replace the plug wing 14 diameter dimensions and have 2 at least, from the bottom to top by diameter large → little → large → little being arranged in order.Replacing the plug wing 14 minor diameter wings can continuous arrangement more than 1 or 1, for example arranges from the bottom to top by the order of 1 major diameter, 2 minor diameters, 1 major diameter, 1 minor diameter.Replace the plug wing 14 diameters greater than the bruising plug wing 5 diameters.
Using the compound cementing plug construction operation of the utility model twin-stage process is,
At first, bruising plug assembly is installed in the float collar top, and with in the well cementation tubing string lower going-into-well cylinder, the beginning cementing operation;
After cementing operation finishes, drop into from well head again and replace the plug assembly, until replace the upper end that rubber plug body 4 in the bruising plug assembly is inserted in the attachment plug 17 of plug assembly lower end, the insert-seal ring 16 that replaces on the plug assembly meshes with the joint ring 12 that is connected of rubber plug body 4 upper ends, replaces plug assembly and bruising plug assembly and is combined into the compound cementing plug of twin-stage;
Then, filling liquid and pressurization in the pit shaft, after the shear pin 11 that connects rubber plug body 4, adapter sleeve 3 is cut off in the pressure rising, under the effect of pressure, replace plug assembly and rubber plug body 4 descending disengaging bodies 1, until the float collar plug 8 of rubber plug body 4 lower ends inserts float collar, joint ring in bruising joint ring 7 and the float collar is connected, finishes well cementing impact pressure and constructs; So far, the plug wing of the plug wing of bruising plug 18, replacement plug 19 is opened, and forms sealing in pit shaft.
The compound cementing plug of the utility model twin-stage utilizes bruising plug assembly to use with replacing plug assembly combination accessory, and self-locking sealing structure can be to realizing sealed-for-life inside and outside the sleeve pipe.In the cementing operation operation, the bruising plug wing 5 that is positioned at body 1 is without prejudice; In being lowered to replacement plug assembly process, replace plug 19 waney replacement plug wings 14 can be with cementing operation the time cement scraping in the sleeve pipe clean, even it is impaired to replace on the plug 19 the larger-size replacement plug wing 14, wherein the int minor diameter bruising plug wing 5 that replaces the plug wing 14 and bruising plug 18 also can Sealed casing pipe; 8 bruisings of major diameter float collar plug improve casing cementing and are constructed into power, and particularly in the composite bushing well cementing operation, advantage of the present utility model is more outstanding.
Bruising plug assembly in the compound cementing plug of the utility model twin-stage arranges positioning sleeve 2, and the mode that is fixedly connected with that between positioning sleeve 2 and adapter sleeve 3, adopts shear pin 11 and lock dog 10, be convenient in follow-up production operation according to the operation needs, remove adapter sleeve 3 and enlarge calibers.
It should be noted that above-described embodiment is example and unrestricted the utility model, those skilled in the art can design a lot of alternate embodiments and not break away from the claim scope of this patent.
Claims (6)
1. the compound cementing plug of twin-stage comprises the bruising plug, replaces plug, and the bruising plug is fixedly mounted on the middle part of rubber plug body cylindrical, and the rubber plug body endoporus is through hole, it is characterized in that:
Body (1) endoporus of bruising plug assembly is up-small and down-big shoulder hole, and the upper surface of lower end small diameter bore is confined planes (9);
The cylindrical of described rubber plug body (4) is up big and down small multidiameter, described bruising plug (18) is installed on the small diameter shaft of rubber plug body (4) lower end, and bruising plug (18) lower end of rubber plug body (4) is installed with jointing (6), float collar plug (8) successively; Radially be installed with successively adapter sleeve (3), positioning sleeve (2) on the upper end axle journal of rubber plug body (4); Positioning sleeve (2), adapter sleeve (3), rubber plug body (4) are radially fixed by not isometrical shear pin (11); The upper end of rubber plug body (4) endoporus is for connecting joint ring (12);
Positioning sleeve (2) in positioning sleeve after being fixedly connected with (2), adapter sleeve (3), the rubber plug body (4) is sitting on the confined planes (9) of bruising plug assembly body (1); Described bruising plug (18) is arranged in the endoporus of body (1) bottom;
The plug empennage (13), replacement plug (19), locking member (15), the attachment plug (17) that replace the plug assembly from top to bottom are fixedly connected sequentially; Insert-seal ring (16) is arranged on the bottom excircle of locking member (15), and the joint ring (12) that is connected of rubber plug body (4) upper end of insert-seal ring (16) and described bruising plug assembly matches and is fixedly connected with.
2. the compound cementing plug of described twin-stage according to claim 1, it is characterized in that: the bruising plug wing (5) diameter of described bruising plug (18) is greater than body (1) lower end diameter of bore; The replacement plug wing (14) of described replacement plug (19) is the Reducing rubber plug wing;
The described replacement plug wing (14) diameter is greater than the bruising plug wing (5) diameter.
3. the compound cementing plug of described twin-stage according to claim 2, it is characterized in that: the replacement plug wing (14) diameter dimension of described replacement plug (19) has 2 at least, from the bottom to top by diameter large → little → large → little being arranged in order.
4. the compound cementing plug of described twin-stage according to claim 3, it is characterized in that: the quantity that the adjacent minor diameter of described replacement plug (19) replaces the plug wing (14) is more than 1 or 1.
5. the compound cementing plug of described twin-stage according to claim 4, it is characterized in that: the upper end of described float collar plug (8) is installed with bruising joint ring (7).
6. the compound cementing plug of described twin-stage according to claim 1, it is characterized in that: the external diameter of the adapter sleeve (3) of described bruising plug assembly is less than the minimum diameter of bore of body (1);
Described not isometrical shear pin (11) is positioned at diameter between positioning sleeve (2), the adapter sleeve (3) greater than the diameter between adapter sleeve (3), the rubber plug body (4);
Described adapter sleeve (3) and positioning sleeve (2) radially between lock dog (10) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220475268 CN202832369U (en) | 2012-09-18 | 2012-09-18 | Double-stage composite well cementation rubber plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220475268 CN202832369U (en) | 2012-09-18 | 2012-09-18 | Double-stage composite well cementation rubber plug |
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| Publication Number | Publication Date |
|---|---|
| CN202832369U true CN202832369U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220475268 Expired - Lifetime CN202832369U (en) | 2012-09-18 | 2012-09-18 | Double-stage composite well cementation rubber plug |
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| CN (1) | CN202832369U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573212A (en) * | 2013-10-28 | 2014-02-12 | 中国石油集团西部钻探工程有限公司 | Composite casing pipe split type rubber plug device well cementing |
| CN103670328A (en) * | 2012-09-18 | 2014-03-26 | 大港油田集团有限责任公司 | Two-stage composite well-cementing rubber plug |
| CN104358542A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气集团公司 | Compound rubber plug for well cementation |
| CN104420859A (en) * | 2013-09-11 | 2015-03-18 | 国际壳牌研究有限公司 | Method To Underdisplace Hydraulic Fractures In Horizontal Or Deviated Well |
| CN104481453A (en) * | 2014-12-11 | 2015-04-01 | 中国石油天然气股份有限公司 | Combined self-locking reducing rubber plug |
| CN107939335A (en) * | 2017-11-16 | 2018-04-20 | 中国石油集团川庆钻探工程有限公司 | The well cementation double rubber plug systems of wear-resisting anti-backflow and application method |
-
2012
- 2012-09-18 CN CN 201220475268 patent/CN202832369U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670328A (en) * | 2012-09-18 | 2014-03-26 | 大港油田集团有限责任公司 | Two-stage composite well-cementing rubber plug |
| CN103670328B (en) * | 2012-09-18 | 2016-12-21 | 大港油田集团有限责任公司 | Twin-stage is combined cementing plug |
| CN104420859A (en) * | 2013-09-11 | 2015-03-18 | 国际壳牌研究有限公司 | Method To Underdisplace Hydraulic Fractures In Horizontal Or Deviated Well |
| CN104420859B (en) * | 2013-09-11 | 2019-08-06 | 国际壳牌研究有限公司 | Drive method of the proppant moved in horizontal well or inclined shaft into fluid power fracturing fracture |
| CN103573212A (en) * | 2013-10-28 | 2014-02-12 | 中国石油集团西部钻探工程有限公司 | Composite casing pipe split type rubber plug device well cementing |
| CN103573212B (en) * | 2013-10-28 | 2016-04-06 | 中国石油集团西部钻探工程有限公司 | Composite bushing well cementation split plug device |
| CN104358542A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气集团公司 | Compound rubber plug for well cementation |
| CN104481453A (en) * | 2014-12-11 | 2015-04-01 | 中国石油天然气股份有限公司 | Combined self-locking reducing rubber plug |
| CN107939335A (en) * | 2017-11-16 | 2018-04-20 | 中国石油集团川庆钻探工程有限公司 | The well cementation double rubber plug systems of wear-resisting anti-backflow and application method |
| CN107939335B (en) * | 2017-11-16 | 2020-09-25 | 中国石油集团川庆钻探工程有限公司 | Wear-resistant anti-backflow double-rubber-plug system for well cementation and using method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Three Dagang oil field, Tianjin, Grand Port, No. 300280 Patentee after: Dagang Oil Field Group Co., Ltd. Patentee after: DRILLING TECHNOLOGY DEVELOPMENT COMPANY, TIANJIN DAGANG OILFIELD RESEARCH INSTITUTE OF PETROLEUM ENGINEERING Address before: Three Dagang oil field, Tianjin, Grand Port, No. 300280 Patentee before: Dagang Oil Field Group Co., Ltd. Patentee before: Tianjin Dagang Oilfield Drilling Technology Development Co., Ltd. |