CN204782907U - Core is glued to multistage sealed rotating blowout preventer - Google Patents

Core is glued to multistage sealed rotating blowout preventer Download PDF

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Publication number
CN204782907U
CN204782907U CN201520525235.2U CN201520525235U CN204782907U CN 204782907 U CN204782907 U CN 204782907U CN 201520525235 U CN201520525235 U CN 201520525235U CN 204782907 U CN204782907 U CN 204782907U
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CN
China
Prior art keywords
sealing
arc
sealed
blowout preventer
conical
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.)
Expired - Fee Related
Application number
CN201520525235.2U
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Chinese (zh)
Inventor
吴霁薇
张海峰
曾琦
陈婷
余家利
蔡俊
刘星
周志稳
段凯
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Yangtze University
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Yangtze University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yangtze University filed Critical Yangtze University
Priority to CN201520525235.2U priority Critical patent/CN204782907U/en
Application granted granted Critical
Publication of CN204782907U publication Critical patent/CN204782907U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a core is glued to multistage sealed rotating blowout preventer belongs to oil and natural gas shaft boring machine technical field. It constitutes by gluing core main part, circle annular metallic skeleton etc. And its characteristics are: gluing the core main part and installing an organic whole with circle annular metallic skeleton, the preparation has the bolt on the circle annular metallic skeleton, it comprises the interior conical surface, a plurality of arc surface, multistage sealed face to glue the core main part, the interior conical surface, arc surface, sealed face all distribute along the axial equidistance and make, and multistage sealed interfacial passes through the arc groove and connects, the interior conical surface, arc surface, sealed face all pass through through the fillet. Effective dispersion local stress, evenly distributed contact force increases effective contact area, and is sealed effectual, avoids droing, and long service life reduces the well control cost, the problem of the conical surface and the uneven local stress concentration that produces of sealed face atress in the prior art, and sealed face and drilling rod contact force big, distribute and too concentrate and reduce effective contact area, result in that its easy fracture comes off, life is short, seal failure is solved.

Description

A kind of multi-stage sealed rotating blowout preventer rubber core
Technical field
The utility model relates to a kind of multi-stage sealed rotating blowout preventer rubber core, belongs to oil and gas well drilling equipment technical field.
Background technology
Under balance pressure drilling is a drilling well new technology, and it effectively can alleviate formation damage, increase oil well productivity.Rotating blowout preventer is the special well-control equipment of under balance pressure drilling, and the glue core seal member that to be rotating blowout preventer indispensable, very important, once the seal failure of glue core, serious drilling failure may be caused.Current rotating blowout preventer rubber core adopts single-stage primary sealing area form usually, and glue core material is acrylonitrile-butadiene rubber and neoprene, and stressed rear deflection is large, can fill, block the passage of medium leakage, and forms contact realization sealing to sealing surface.Under original state, because glue in-core footpath is less than drilling tool external diameter, between glue core and drilling tool, form interference fit, form certain initial sealing pressure; During drillng operation, glue core holds drilling rod or joint further tightly under well drilling fluid and natural resiliency metamorphosis, realizes sealing; Due to glue core drilling rod frictional force drive under with drilling rod rotate while, drilling rod enters under doing relative to glue core, on propose motion, therefore require the contact between glue core and drilling rod can not too little can not be too large, too little sealing is unreliable, too conference increases frictional force, shortens glue core application life.Existing single-stage primary sealing area glue core is when operation, its inner conical surface and sealing surface intersection can produce stress raisers, and the contact of sealing surface and drilling rod is large, it is too concentrated to distribute, effective contact area will diminish, cause glue core easy to crackly to come off, application life is short, seal failure, frequently must change glue core guarantee drillng operation security procedure, considerably increase well control cost.
Summary of the invention
The purpose of this utility model is, provides one effectively can disperse local stress, is uniformly distributed contact, increase effective contact area, good sealing effect, avoid coming off, long service life, reduces the multi-stage sealed rotating blowout preventer rubber core of well control cost; Solving existing single-stage glue core because of inner conical surface and sealing surface intersection discontinuity produces stress raisers, and the contact of sealing surface and drilling rod large, distribute too concentrated and reduce effective contact area, cause it easy to crackly to come off, application life be short, the problem of seal failure.
The utility model realizes above-mentioned purpose by the following technical solutions
This multi-stage sealed rotating blowout preventer rubber core is made up of glue core main body, circular ring metal skeleton, bolt, it is characterized in that: glue core main body and circular ring metal skeleton are installed and linked into an integrated entity, and uniformly on circular ring metal skeleton is manufactured with bolt; Glue core main body is made up of inner conical surface, multiple arc surface, multistage dense front cover; Inner conical surface, arc surface, sealing surface are equally spaced making all vertically, are connected between multistage dense front cover by arc groove; Inner conical surface, arc surface, sealing surface are all connected by round-corner transition.
Described sealing surface is plane or is convex surface, and sealing surface Shuo Liang≤2, sealing surface is equally spaced vertically.
Described arc surface is equally spaced vertically, arc surface Shuo Liang≤2.
The radian of described arc groove is 15 ° ~ 30 °.
The radian of described fillet is 15 ° ~ 30 °.
The utility model beneficial effect is compared with prior art
This multi-stage sealed rotating blowout preventer rubber core realizes multi-stage sealed by multiple arc surface, multiple sealing surface, allows contact be evenly distributed on each sealing surface, makes each sealing surface can reach effective sealing load, improves the reliability of dynamic seal (packing); The arc groove made between each sealing surface and replace wedge angle with fillet and carry out transition and linkage, thus greatly reduce the stress raisers phenomenon of glue core body; After wherein lost efficacy in primary seal face, the sealing effectiveness that other grade of sealing surface still can play, effectively avoids glue core body to ftracture and come off, extend its life-span long, reduce well control cost, and structure was simple, easy to make.Solving existing single-stage glue core well because of inner conical surface and sealing surface intersection discontinuity produces stress raisers, and the contact of sealing surface and drilling rod is large, distribute too concentrated and reduce effective contact area, causes it easy to crackly to come off, application life is short, the problem of seal failure.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of overall structure schematic diagram of multi-stage sealed rotating blowout preventer rubber core;
Accompanying drawing 2 is a kind of plan structure schematic diagram of multi-stage sealed rotating blowout preventer rubber core;
What accompanying drawing 3 was a kind of multi-stage sealed rotating blowout preventer rubber core looks up structural representation.
In figure: 1, glue core main body, 2, circular ring metal skeleton, 3, bolt, 100, inner conical surface, 101, arc surface, 102, sealing surface, 103, arc groove, 104, fillet.
Detailed description of the invention
Be described in detail below in conjunction with the embodiment of accompanying drawing to this multi-stage sealed rotating blowout preventer rubber core:
This multi-stage sealed rotating blowout preventer rubber core is made up of glue core main body 1, circular ring metal skeleton 2, bolt 3, and glue core main body 1 and circular ring metal skeleton 2 are installed and linked into an integrated entity, and uniformly on circular ring metal skeleton 2 is manufactured with bolt 3; Glue core main body 1 is made up of inner conical surface 100, multiple arc surface 101, multistage dense front cover 102; Inner conical surface 100, arc surface 101, sealing surface 102 are equally spaced making all vertically, are connected between multistage dense front cover 102 by arc groove 103; Inner conical surface 100, arc surface 101, sealing surface 102 are all by fillet 104 transition and linkage.
Described sealing surface 102 is in plane or in convex surface, sealing surface 102 Shuo Liang≤2, sealing surface 102 is equally spaced vertically.
Described arc surface 101 is equally spaced vertically, arc surface 101 Shuo Liang≤2.
The radian of described arc groove 103 is 15 ° ~ 30 °.
The radian of described fillet 104 is 15 ° ~ 30 °.(see accompanying drawing 1 ~ 3)
This multi-stage sealed rotating blowout preventer rubber core, by multistage dense front cover 102 sealing drilling rod, effectively can close the annular space between drilling tool and the borehole wall, improve the reliability of sealing, is applicable to pressurely creep into operation, is specially adapted under balance pressure drilling.
The course of work of this multi-stage sealed rotating blowout preventer rubber core is as follows:
Under original state, because glue core main body 1 internal diameter is less than drilling tool external diameter, interference fit will be formed between glue core main body 1 and drilling tool, outwards extruding can there is elastic deformation in glue core main body 1, make to form certain initial contact force between sealing surface 102 and drilling rod, thus there is certain initial sealing pressure; During drillng operation, the pressure of well drilling fluid acts on outside glue core main body 1, inwardly extruding can there is elastic deformation in glue core main body 1, make to form additional contact pressure between sealing surface 102 and drilling rod, the contact produced under adding glue core main body 1 natural resiliency metamorphosis, glue core main body 1 can hold drilling rod or joint tightly further, realizes sealing.
Contact is the power between sealing surface and drilling rod, because the elastic deformation at sealing surface 102 place is maximum, thus the contact at this place is also maximum, after employing multistage dense front cover 102, contact can be evenly distributed on sealing surface 102 at different levels, thus avoid the phenomenon that occurs that on single primary sealing area 102, contact is too concentrated, after wherein lost efficacy in primary seal face 102, other grade of sealing surface 102 still can ensure good sealing effectiveness, so just substantially increases the reliability of glue core main body 1 pair of drilling rod or joint sealing.Solve well existing single sealing means because the contact of sealing surface and drilling rod is large, distribute too concentrated and reduce effective contact area, cause glue core easy to crackly to come off, application life be short, the problem of seal failure.
Stress is concentrated and is mainly occurred in primary sealing area 102 with in the contact of inner conical surface 100, glue core main body 1 rotates with drilling rod under the drive of drilling rod frictional force, simultaneously, drilling rod relative to glue core main body 1 transferring, on propose motion, in the process, glue core main body 1 can be stretched, compress, adopt arc groove 103, fillet 104, arc surface 101, avoid the stress concentration phenomenon that inner conical surface 100 and the original wedge angle transition position of sealing surface 102 occur, improve and solve existing single-stage glue core because of inner conical surface and sealing surface intersection discontinuity, produce the defect of stress raisers.
The above is the detailed description of the invention of this utility model, above-mentioned illustrating is not construed as limiting flesh and blood of the present utility model, person of an ordinary skill in the technical field can make an amendment above-mentioned detailed description of the invention or be out of shape after having read this manual, and does not deviate from essence of the present utility model and scope.

Claims (5)

1. a multi-stage sealed rotating blowout preventer rubber core, it is made up of glue core main body (1), circular ring metal skeleton (2), bolt (3), it is characterized in that: glue core main body (1) and circular ring metal skeleton (2) are installed and linked into an integrated entity, circular ring metal skeleton (2) is above uniform is manufactured with bolt (3); Glue core main body (1) is made up of inner conical surface (100), multiple arc surface (101), multistage dense front cover (102); Inner conical surface (100), arc surface (101), sealing surface (102) are equally spaced making all vertically, are connected between multistage dense front cover (102) by arc groove (103); Inner conical surface (100), arc surface (101), sealing surface (102) are all by fillet (104) transition and linkage.
2. the multi-stage sealed rotating blowout preventer rubber core of one according to claim 1, is characterized in that: described sealing surface (102) is in plane or in convex surface, Shuo Liang≤2 of sealing surface (102), sealing surface (102) is equally spaced vertically.
3. the multi-stage sealed rotating blowout preventer rubber core of one according to claim 1, is characterized in that: described arc surface (101) is equally spaced vertically, Shuo Liang≤2 of arc surface (101).
4. the multi-stage sealed rotating blowout preventer rubber core of one according to claim 1, is characterized in that: the radian of described arc groove (103) is 15 ° ~ 30 °.
5. the multi-stage sealed rotating blowout preventer rubber core of one according to claim 1, is characterized in that: the radian of described fillet (104) is 15 ° ~ 30 °.
CN201520525235.2U 2015-07-20 2015-07-20 Core is glued to multistage sealed rotating blowout preventer Expired - Fee Related CN204782907U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520525235.2U CN204782907U (en) 2015-07-20 2015-07-20 Core is glued to multistage sealed rotating blowout preventer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520525235.2U CN204782907U (en) 2015-07-20 2015-07-20 Core is glued to multistage sealed rotating blowout preventer

Publications (1)

Publication Number Publication Date
CN204782907U true CN204782907U (en) 2015-11-18

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ID=54522975

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520525235.2U Expired - Fee Related CN204782907U (en) 2015-07-20 2015-07-20 Core is glued to multistage sealed rotating blowout preventer

Country Status (1)

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CN (1) CN204782907U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110552652A (en) * 2019-08-05 2019-12-10 大庆市普庆密封材料配件有限公司 carbon silica gel self-sealing core for well drilling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110552652A (en) * 2019-08-05 2019-12-10 大庆市普庆密封材料配件有限公司 carbon silica gel self-sealing core for well drilling

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151118

Termination date: 20160720