CN202249929U - Combined self-locking reducing rubber plug for casing - Google Patents
Combined self-locking reducing rubber plug for casing Download PDFInfo
- Publication number
- CN202249929U CN202249929U CN2011203442975U CN201120344297U CN202249929U CN 202249929 U CN202249929 U CN 202249929U CN 2011203442975 U CN2011203442975 U CN 2011203442975U CN 201120344297 U CN201120344297 U CN 201120344297U CN 202249929 U CN202249929 U CN 202249929U
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- plug
- rubber
- locking
- self
- casing
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- Expired - Fee Related
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Abstract
The utility model discloses a combination is from locking-type reducing plug for sleeve pipe makes the sleeve pipe cluster have the well cementation demand of a plurality of different internal diameter sizes to design for satisfying because of connecting the instrument in the pit, and the plug concatenates by big rubber bowl, little rubber bowl, plug body and the internal dabber connecting piece of tapered end promptly and forms to with the float hoop cooperation operation that has elastic function. The utility model adopts rubber bowls with different outer diameters, can realize the scraping of the casing pipe under the condition of different inner diameters, and meets the requirements of well cementation operation; the reducing rubber bowl is realized through a split combined structure, and rubber with different hardness is adopted for processing, so that the requirement on casing scraping under the condition of large reducing diameter can be met; the rubber plug has a self-locking function, and can prevent the later stage of the rubber plug from floating in the sleeve to influence the later-stage operation.
Description
Technical field
The utility model relates to the effective combination self-locking of a kind of cover Reducing rubber plug, belongs to oil casing and cementing technical field.
Background technology
But the sleeve pipe sliding sleeve is a kind of instrument that switching sliding sleeve is connected in sleeve pipe and is lowered to and cements the well with sleeve pipe.After the well cementation, can satisfy the needs of operations such as later stage pressure break and water blockoff through switching sliding sleeve.If on casing string, connect sliding sleeve, because the structure of sliding sleeve is special, different local internal diameters are different, cause the bunch tube internal diameter varies bigger.In the well cementation process, if use the plug of conventional well cementation, the plug external diameter is the same, can not satisfy the needs of little internal diameter (sleeve portion), large diameter (sliding sleeve part) cement scraping simultaneously.In the well cementation process, if the cement scraping is unclean, also might stay big section cement plug, influence the later stage operation.
Summary of the invention
The purpose of the utility model is to provide the effective combination self-locking of a kind of cover Reducing rubber plug, and it can satisfy the requirement of well cementation sliding sleeve scraping, and the guarantee cementing operation is accomplished smoothly.
The concrete technology contents of the utility model is following:
Plug is formed by the serial connection of the mandrel connector in big glue bowl, little glue bowl, rubber plug body and the self-locking head body.Be useful on the centre bore that connects self-locking head in the fit structure, the fit structure outside connects the float collar body, is provided with a circle elastomeric material between the two.
During operation, when plug moved down into the float collar place, the downward thrust of self-locking head can cause elastomeric material to shrink, thereby made the fit structure latus rectum become big.Self-locking head is through behind the fit structure, and elastomeric material is no longer stressed, recovers former flexible, and fit structure recovers original size, prevents through the self-locking step that self-locking head from returning and removes, and realizes the plug self-locking.
This utility model realizes under the different inner diameters condition scraping to sleeve pipe through the glue bowl structure that adopts the different size external diameter, thereby satisfies the well cementing operation requirement; Reducing glue bowl realizes through split modular structure, through adopting the different hardness rubber processing, can satisfy under the big reducing situation requirement to the sleeve pipe scraping; This plug provides auto-lock function simultaneously, and avoiding the plug later stage to float on influences the later stage operation in the sleeve pipe.
Description of drawings
Fig. 1 is the effective combination self-locking Reducing rubber plug structural representation of cover.
Fig. 2 is that plug is connected sketch map with the self-locking of float collar fit structure.
The specific embodiment
Embodiment:
With reference to Fig. 1 and 2 the embodiment of the utility model is further specified:
Process big glue bowl 1, external diameter is ￠ 154mm, than the big 6mm of instrument maximum inner diameter (￠ 148mm), adopts the rubber of shore hardness about 65; Process little glue bowl 2, external diameter is ￠ 108mm, than the big 11mm of casing inner diameter, adopts hardness 75 left and right sides rubber; Totally four groups, be threaded onto together through mandrel connector 4; Rubber plug body 3 external diameters are selected than the little 15-20mm of casing inner diameter, and self-locking head 5 is connected in its end.Processing is used for connecting the centre bore of self-locking head 5 in fit structure 7, between fit structure 7 and float collar body 8 that its outside is connected, is provided with one and encloses elastomeric material 6.
The field conduct step is following:
(1) processes each accessory as requested, connect the combination plug through thread forms;
(2) connect float collar, float shoe, sleeve pipe, downhole tool and assigned address according to the tubing string connection request down to the shaft bottom;
(3) after well cementation begins to replace operation, plug is dropped in the bunch tube from well head, begin to replace construction;
(4) plug is in sleeve pipe, and big glue bowl can shrink and be affixed on the rubber plug body, and smoothly through the less sleeve pipe of internal diameter, when running to sliding sleeve large diameter place, big glue bowl opens, and satisfies large diameter place scraping needs;
(5) replacement finishes, and plug and float collar are realized self-locking.
Claims (1)
1. one kind is overlapped effective combination self-locking Reducing rubber plug, it is characterized in that:
Plug is formed by the serial connection of the mandrel connector (4) in big glue bowl (1), little glue bowl (2), rubber plug body (3) and self-locking head (5) body; Fit structure is provided with the centre bore that is used to connect self-locking head (5) in (7), and fit structure (7) outside connects float collar body (8), is provided with a circle elastomeric material (6) between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203442975U CN202249929U (en) | 2011-09-14 | 2011-09-14 | Combined self-locking reducing rubber plug for casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203442975U CN202249929U (en) | 2011-09-14 | 2011-09-14 | Combined self-locking reducing rubber plug for casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202249929U true CN202249929U (en) | 2012-05-30 |
Family
ID=46111188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203442975U Expired - Fee Related CN202249929U (en) | 2011-09-14 | 2011-09-14 | Combined self-locking reducing rubber plug for casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202249929U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556970A (en) * | 2013-11-08 | 2014-02-05 | 西安航威石化设备有限公司 | Combined self-lock rubber plug |
| CN104481453A (en) * | 2014-12-11 | 2015-04-01 | 中国石油天然气股份有限公司 | Combined self-locking type reducing rubber plug |
| CN104563873A (en) * | 2014-12-11 | 2015-04-29 | 中国石油天然气股份有限公司 | Underground casing power guiding device |
| CN106285556A (en) * | 2015-05-12 | 2017-01-04 | 中国石油化工股份有限公司 | Cementing plug and cementing method and the segmented fracturing device of applying it |
| CN106522878A (en) * | 2016-12-08 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Anti-seizing rubber plug |
| CN106555563A (en) * | 2015-09-24 | 2017-04-05 | 中国石油化工股份有限公司 | Casing recess cleans well cementing impact pressure plug |
| CN106639911A (en) * | 2016-12-26 | 2017-05-10 | 中国石油天然气股份有限公司 | Reducing floating coupling |
| CN112412392A (en) * | 2020-11-18 | 2021-02-26 | 中国石油集团渤海钻探工程有限公司 | Cementing rubber plug for slim hole |
-
2011
- 2011-09-14 CN CN2011203442975U patent/CN202249929U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556970A (en) * | 2013-11-08 | 2014-02-05 | 西安航威石化设备有限公司 | Combined self-lock rubber plug |
| CN104481453A (en) * | 2014-12-11 | 2015-04-01 | 中国石油天然气股份有限公司 | Combined self-locking type reducing rubber plug |
| CN104563873A (en) * | 2014-12-11 | 2015-04-29 | 中国石油天然气股份有限公司 | Underground casing power guiding device |
| CN104563873B (en) * | 2014-12-11 | 2017-01-11 | 中国石油天然气股份有限公司 | Underground casing power guiding device |
| CN106285556A (en) * | 2015-05-12 | 2017-01-04 | 中国石油化工股份有限公司 | Cementing plug and cementing method and the segmented fracturing device of applying it |
| CN106555563A (en) * | 2015-09-24 | 2017-04-05 | 中国石油化工股份有限公司 | Casing recess cleans well cementing impact pressure plug |
| CN106555563B (en) * | 2015-09-24 | 2019-09-20 | 中国石油化工股份有限公司 | Casing recess cleans well cementing impact pressure rubber plug |
| CN106522878A (en) * | 2016-12-08 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Anti-seizing rubber plug |
| CN106639911A (en) * | 2016-12-26 | 2017-05-10 | 中国石油天然气股份有限公司 | Reducing floating coupling |
| CN112412392A (en) * | 2020-11-18 | 2021-02-26 | 中国石油集团渤海钻探工程有限公司 | Cementing rubber plug for slim hole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20200914 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |