CN102373888A - Sleeve floating coupling and well cementing method - Google Patents
Sleeve floating coupling and well cementing method Download PDFInfo
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- CN102373888A CN102373888A CN2010102472899A CN201010247289A CN102373888A CN 102373888 A CN102373888 A CN 102373888A CN 2010102472899 A CN2010102472899 A CN 2010102472899A CN 201010247289 A CN201010247289 A CN 201010247289A CN 102373888 A CN102373888 A CN 102373888A
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- box cupling
- floating box
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Abstract
The invention discloses a sleeve floating coupling and a well cementing method. The sleeve floating coupling comprises a tubular body, a blind flange and a retainer ring, wherein a first connection end and a second connecting end are respectively formed at the two ends of the tubular body, and a circular step and a circular groove are formed on the inner wall of the tubular body; the retainer ring is located in the circular groove; and the blind flange is located between the circular step and the retainer ring, and the blind flange is a brittle board which is broken into fine and small particles when impacted by 15-35 MPa hydraulic force. The well cementing method is implemented by adopting the sleeve floating coupling to carry out well cementing operation. By using the sleeve floating coupling, the well cementing process is simple and reliable to operate, thus the well cementing operation time and operation cost are greatly reduced, and the economic benefits are high.
Description
Technical field
The present invention relates to the well cementing operation technical field, specifically a kind of casing floating box cupling and cementing method of the usefulness of cementing the well.
Background technology
At present, at extended reach well, in the well cementation process of particularly long horizontal segment well; Sleeve pipe in the casing job can paste the borehole wall to slide forward after getting into horizontal segment always, along with the increase of casing length, action of gravity make sleeve pipe to be lowered to frictional resistance very big; Very serious to casing wear; Because sleeve pipe is not placed in the middle in well, had a strong impact on the cementing quality of horizontal segment, follow-up operation and production work have been brought a lot of inconvenience.
The casing floating technology is to utilize floating coupling in the sleeve pipe of horizontal segment, to set up the casing section that does not contain drilling fluid or contain low density liquid, thereby makes the sleeve pipe of this section in completion fluid, produce buoyancy upwards, reduces the frictional resistance that is lowered to of sleeve pipe, and sleeve pipe is lowered to smoothly.
The patent No. is that the Chinese utility model patent of ZL200820124103.9 discloses a kind of casing floating box cupling; That can realize sleeve pipe floatingly is lowered to operation; But if carry out well cementing operation, then need be lowered to drilling tool floating coupling internal part brill is removed, increase activity duration and operating cost.
The patent No. is that the Chinese utility model patent of ZL02210159.4 also discloses a kind of casing floating box cupling, can realize that also casing floating is lowered to process, after tubing string is lowered to and puts in place; Suppress earlier; The floating coupling internal part is suppressed logical, remaining all component can with the well cementation the bruising plug move down into the block ring place, can bore once more at sleeve bottom and remove; But this instrument can not be installed in the sleeve pipe tubing string too much, can't realize that the bruising plug replaces the process of a plurality of floating coupling inner components.
The patent No. is that the Chinese utility model patent of ZL200720169771.9 discloses a kind of blind plate of exempting to bore; Through the processing that interior panelling is slotted; Weaken the intensity in centre, make floating coupling when receiving hydraulic coupling and break, fracture pressure everywhere is identical.Back or a global shape but blind plate breaks just can be impacted by hydraulic coupling and hold a fluid passage, and the residual parts of meeting in the sleeve pipe when well cementation, influence passing through of plug rubber, influence same well operations.
Prior art all need be lowered to drilling tool once more and bore except that contents in the multistage floating cementing technology of sleeve pipe, has increased a large amount of activity durations and operating cost.
Summary of the invention
In order to solve the problems referred to above that exist in the prior art; The invention provides a kind of casing floating box cupling; The sleeve pipe that can better solve extended reach well or long horizontal segment well is lowered to and the well cementation problem; And need not be lowered to the drilling tool brill except that the follow-up well cementing operation of completion under the situation of contents, thereby reduce activity duration and operating cost.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
The casing floating box cupling comprises a tubular body, also comprises blind plate and back-up ring, wherein,
The two ends of said tubular body form first link and second link respectively, and the inwall of said tubular body forms a ring-shaped step and an annular groove;
Said back-up ring is located in the annular groove;
Said blind plate is located between ring-shaped step and the back-up ring, and said blind plate is to receive the fluid power of 15～35MPa to impact the fragility plate that promptly is broken into tiny particle.
The internal diameter of the external diameter of said first link and second link is suitable.
Said first link has external screw thread, and said second link has internal thread.
Said fragility plate is the vitreous ceramic plate.
The present invention also provides a kind of cementing method, and this method activity duration is short, and cost is low, has saved the operation of removing the casing coupling contents, can accomplish continuously.Its technical scheme is following:
Cementing method comprises the steps:
A. use above-mentioned arbitrary described casing floating box cupling splicing sleeve;
B. with the sleeve pipe that connects be lowered to put in place after, suppress with pump truck, get through each casing floating box cupling successively.
Compared with prior art; Beneficial effect of the present invention is: the blind plate of casing floating box cupling of the present invention can be broken into tiny particle after bearing certain pressure; Can flow out the inside pipe casing space in company with mud or completion fluid; Can residual any parts in sleeve pipe, do not need to be lowered to once more drilling tool and bore and remove, can directly utilize the float shoe of sleeve bottom to carry out well cementing operation.Make the process operation letter, reliable of well cementation, greatly reduce the activity duration and the operating cost of well cementation, have very high economic benefit.
Description of drawings
Fig. 1 partly cuts open figure for the structure of casing floating box cupling of the present invention;
Fig. 2 partly cuts open figure for the principle of casing floating box cupling of the present invention in well cementing operation.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail, but not as to qualification of the present invention.
The casing floating box cupling comprises a tubular body 1, back-up ring 2 and blind plate 3, and the two ends of said tubular body form first link 5 and second link 4 respectively; The inwall of said tubular body 1 forms a ring-shaped step and an annular groove; Back-up ring 2 is located in the annular groove, and blind plate 3 is located between this ring-shaped step and the back-up ring 2, and back-up ring 2 is spacing with blind plate 3 with ring-shaped step; Blind plate 3 is with the tubular body sealing, and blind plate 3 impacts the fragility plate that promptly is broken into tiny particle for the fluid power that receives 15～35MPa.The body of casing floating box cupling of the present invention adopts integral structure, does not adopt multistage ways of connecting in the prior art, and overall structure is more firm.And blind plate adopts fragile material; After having certain impact, be broken into tiny particle; Can flow out the inside pipe casing space in company with mud or completion fluid, can residual any parts in sleeve pipe, in well cementing operation, do not need to be lowered to once more drilling tool and bore and remove; Save operation, reduced operation easier.
As one of present embodiment preferred, the internal diameter of the external diameter of said first link and second link is suitable, said first link has external screw thread, said second link has internal thread.The two ends of casing floating box cupling of the present invention can be suitable, and this kind box cupling can be that two box cuplings connect when in use, also can be that box cupling is connected with sleeve pipe.
Preferred as another of present embodiment, said fragility plate is the vitreous ceramic plate.Actual conditions according to well cementation; Those skilled in the art can select suitable vitreous ceramic to make back-up ring 3; Back-up ring 3 is impacted down at required pressure be broken into tiny particle, so that with flowing out sleeve pipe in company with mud or completion fluid, and then the enforcement of completion well cementing operation.Certainly, the fragility plate of casing floating box cupling of the present invention also can adopt other fragile material, as long as under certain fluid power impacts, can be broken into tiny particle.
As shown in Figure 2, connect with one or more sleeve pipes 7 between two casing floating box cuplings 6, constitute an airtight space.In confined space, be not in the milk, in tubing string, will form " air bag " that is full of air 8.When whole tubing string is in completion fluid, should " air bag " will produce buoyancy upwards.According to the buoyancy size that the Force Calculation needs of tubing string produce, confirm size and what of floating " air bag ", and riding position, thereby reduce the frictional force of tubing string and soffit, sleeve pipe is lowered to smoothly puts in place.
The present invention also provides a kind of cementing method, and its technical scheme is following:
Cementing method, the different following steps that are with existing cementing method:
A. use the arbitrary described casing floating box cupling splicing sleeve of the invention described above;
B. with the sleeve pipe that connects be lowered to put in place after, suppress with pump truck, get through each casing floating box cupling successively.
The advantage of cementing method of the present invention is; Use casing floating box cupling of the present invention, use pump truck to suppress and can blind plate be broken into tiny particle, and flow out sleeve pipe in company with mud or completion fluid; And then whole cannula system got through; Bore except that blind plate and needn't be lowered to drilling tool, make the well cementation operation simpler, operation is more prone to.
For further understanding the different of cementing method of the present invention and existing method, the process of facing cementing method of the present invention down is described in detail.
Cementing method comprises the steps:
1. calculate sleeve pipe stressed in being lowered to process according to casing programme, the installation site of confirming the casing floating box cupling with quantity is installed;
2. the result who confirms according to step a pours into mud with the arbitrary described casing floating box cupling splicing sleeve of the invention described above in not needing floating casing section;
With the sleeve pipe that connects be lowered to put in place after, suppress with pump truck, get through each casing floating box cupling successively;
4. circulation completion fluid, the cement injection well cementation;
5. the throwing plug replaces cement paste, bruising, and construction operation finishes.
Mainly be to have used in the step 2 casing floating box cupling of the present invention it is thus clear that cementing method of the present invention is different with prior art, and then in step 3, can adopt the mode of suppressing that the casing floating box cupling is got through, remove blind plate and needn't be lowered to drilling tool.Step is simpler, and is more convenient to operate.
This method activity duration is short, and cost is low, has saved the operation of removing the casing coupling contents, has reduced operation easier, and well cementing operation can be accomplished continuously.
Above embodiment is merely exemplary embodiment of the present invention, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection domain, this modification or be equal to replacement and also should be regarded as dropping in protection scope of the present invention.
Claims (5)
1. the casing floating box cupling comprises a tubular body, it is characterized in that, also comprises blind plate and back-up ring, wherein,
The two ends of said tubular body form first link and second link respectively, and the inwall of said tubular body forms a ring-shaped step and an annular groove;
Said back-up ring is located in the annular groove;
Said blind plate is located between ring-shaped step and the back-up ring, and said blind plate is to receive the fluid power of 15～35MPa to impact the fragility plate that promptly is broken into tiny particle.
2. casing floating box cupling according to claim 1 is characterized in that, the internal diameter of the external diameter of said first link and second link is suitable.
3. casing floating box cupling according to claim 1 is characterized in that, said first link has external screw thread, and said second link has internal thread.
4. casing floating box cupling according to claim 1 is characterized in that, said fragility plate is the vitreous ceramic plate.
5. cementing method is characterized in that, comprises the steps:
A. use the arbitrary described casing floating box cupling splicing sleeve of claim 1 to claim 4;
B. with the sleeve pipe that connects be lowered to put in place after, suppress with pump truck, get through each casing floating box cupling successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102472899A CN102373888A (en) | 2010-08-06 | 2010-08-06 | Sleeve floating coupling and well cementing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102472899A CN102373888A (en) | 2010-08-06 | 2010-08-06 | Sleeve floating coupling and well cementing method |
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| CN102373888A true CN102373888A (en) | 2012-03-14 |
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| CN2010102472899A Pending CN102373888A (en) | 2010-08-06 | 2010-08-06 | Sleeve floating coupling and well cementing method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677719A (en) * | 2015-11-09 | 2017-05-17 | 中石化石油工程技术服务有限公司 | Well cementing method, well cementing assembly and collapse type sleeve floating coupling thereof |
| CN107165587A (en) * | 2017-06-19 | 2017-09-15 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | A kind of floating coupling device and sleeve pipe pay-off method |
| CN107313727A (en) * | 2017-07-11 | 2017-11-03 | 中石化石油工程技术服务有限公司 | One kind floating setting of casing high intensity self-dissolving formula box cupling |
| CN108180012A (en) * | 2017-12-21 | 2018-06-19 | 黄明道 | Deepwater drilling platform IBOP valves and preventer joint pressure test tool and pressure-measuring method |
| CN109989725A (en) * | 2017-12-29 | 2019-07-09 | 中石化石油工程技术服务有限公司 | Exempt from brill formula blind plate and exempts to bore plug well shaft fixing technology |
| CN111691848A (en) * | 2020-06-19 | 2020-09-22 | 西北工业大学 | Full-pressure temporary plugging structure for controlling crushing granularity and design method |
| CN112412342A (en) * | 2020-12-15 | 2021-02-26 | 中国石油天然气集团有限公司 | Breakable blind plate type floating coupling device, using method and preparation method of blind plate |
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| CN101514619A (en) * | 2009-04-08 | 2009-08-26 | 自贡市华气科技开发有限公司 | Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well |
| CN201794527U (en) * | 2010-08-06 | 2011-04-13 | 安东石油技术（集团）有限公司 | Casing float collar |
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| US5423575A (en) * | 1993-07-30 | 1995-06-13 | Sonsub, Inc. | Concentric riser joint with self-aligning coupling |
| CN201024942Y (en) * | 2007-04-24 | 2008-02-20 | 吐哈石油勘探开发指挥部钻井一公司 | Drilling free blind plate device |
| CN201027536Y (en) * | 2007-04-30 | 2008-02-27 | 青州市春晖科技发展有限公司 | Differential pressure type drilling-free blankoff flange |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677719A (en) * | 2015-11-09 | 2017-05-17 | 中石化石油工程技术服务有限公司 | Well cementing method, well cementing assembly and collapse type sleeve floating coupling thereof |
| CN106677719B (en) * | 2015-11-09 | 2019-07-16 | 中石化石油工程技术服务有限公司 | A kind of cementing method, well cementation component and its collapse type casing float collar |
| CN107165587A (en) * | 2017-06-19 | 2017-09-15 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | A kind of floating coupling device and sleeve pipe pay-off method |
| CN107165587B (en) * | 2017-06-19 | 2023-11-03 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Floating coupling device and casing running method |
| CN107313727A (en) * | 2017-07-11 | 2017-11-03 | 中石化石油工程技术服务有限公司 | One kind floating setting of casing high intensity self-dissolving formula box cupling |
| CN108180012A (en) * | 2017-12-21 | 2018-06-19 | 黄明道 | Deepwater drilling platform IBOP valves and preventer joint pressure test tool and pressure-measuring method |
| CN109989725A (en) * | 2017-12-29 | 2019-07-09 | 中石化石油工程技术服务有限公司 | Exempt from brill formula blind plate and exempts to bore plug well shaft fixing technology |
| CN111691848A (en) * | 2020-06-19 | 2020-09-22 | 西北工业大学 | Full-pressure temporary plugging structure for controlling crushing granularity and design method |
| CN111691848B (en) * | 2020-06-19 | 2021-08-17 | 西北工业大学 | Full-pressure temporary plugging structure for controlling crushing granularity and design method |
| CN112412342A (en) * | 2020-12-15 | 2021-02-26 | 中国石油天然气集团有限公司 | Breakable blind plate type floating coupling device, using method and preparation method of blind plate |
| CN112412342B (en) * | 2020-12-15 | 2023-03-07 | 中国石油天然气集团有限公司 | Breakable blind plate type floating coupling device, using method and preparation method of blind plate |
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Application publication date: 20120314 |