CN103334703A - Middle dual-flexibility device for offshore drilling riser - Google Patents
Middle dual-flexibility device for offshore drilling riser Download PDFInfo
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- CN103334703A CN103334703A CN2013102541572A CN201310254157A CN103334703A CN 103334703 A CN103334703 A CN 103334703A CN 2013102541572 A CN2013102541572 A CN 2013102541572A CN 201310254157 A CN201310254157 A CN 201310254157A CN 103334703 A CN103334703 A CN 103334703A
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- mandrel body
- lower position
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- flange
- offshore drilling
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Abstract
The invention discloses a middle dual-flexibility device for an offshore drilling riser. The middle dual-flexibility device comprises an upper flange and a lower flange, wherein the upper flange and the lower flange are inwardly and fixedly connected through a section of main pipe and a straight end head of a primary core shaft body respectively; the external surface of an arc-shaped wear-resistant end of each primary core shaft body is integrally and fixedly connected with a base through a primary flexible element; the internal surfaces of arc-shaped wear-resistant ends of primary core shaft bodies of upper and lower positions are in corresponding sliding contact with the external surface of a secondary core shaft body respectively, and the internal surface of each secondary core shaft body is integrally and fixedly connected with a secondary flexible element; the internal circular surface of each secondary flexible element is in corresponding sliding contact with a wear-resistant ring, and two wear-resistant rings are integrated; and a circular tube is sleeved on the external circular surface of each base, and two annular flanges are respectively and fixedly connected to two end faces of the circular tubes. According to the middle dual-flexibility device disclosed by the invention, a primary and secondary dual-flexible-element assembly structure is adopted, so that the structure is simple, the function is reliable, and the operation is convenient.
Description
Technical field
The invention belongs to sea oil drilling and production equipment technology field, relate to a kind of Offshore Drilling Riser two flexible devices in middle part.
Background technology
Marine drilling platform (or ship) except meeting generation roll and pitch, also will produce drift with wave under wave and action of ocean current, along with marine drilling to deep-water developments, marine environment load is harsher.All these will have a strong impact on the drilling water-separation pipe stability of a system and wellhead assembly safety, if rigidly connected drilling water-separation pipe system can not effectively compensate these motions, will make the drilling water-separation pipe system failure can't continue to creep into, cause tremendous loss for the marine drilling engineering, even bringing on a disaster property consequence.
Deep water Offshore Drilling Riser flexible device is one of key equipment in the Offshore Drilling Riser system, can effectively compensate riser system and produce bigger flexible drift angle at action of ocean current and hull drift, its product and technology are monopolized by developed countries such as America and Europes always.Monopolized by external OIL STATES and VETCO two companies as the bottom flexible device always.Chinese patent CN101377121A has announced flexible device under a kind of Offshore Drilling Riser water, and this flexible device is installed in the riser system bottom, allows to have the drift angle between riser system and the BOP group, thereby reduces the flexural stress of riser system bottom; But because the reasons in structure of this flexible device itself, this flexible device can not be used for the centre position of riser system, therefore, and the drift angle of the riser system centre position generation that this flexible device can't compensate rigid connects.
The deep water Offshore Drilling Riser uses the middle part flexible device as one of visual plant that ensures offshore oil drilling riser system operate as normal, this device is installed in the drilling water-separation pipe system middle part below the drilling water-separation pipe stretching device, there is bigger deflection angle between permission is single by the drilling water-separation pipe of two parts up and down of its connection, and can effectively reduces this place's local buckling stress.At present, the drilling well flexible device of domestic existing floating drilling platform (ship) use all relies on import.
Summary of the invention
The purpose of this invention is to provide a kind of Offshore Drilling Riser two flexible devices in middle part, having solved the drilling water-separation pipe system middle part employing that exists in the prior art is rigidly connected, can't compensate the drift angle that marine riser exists between single, cause the problem of the excessive easy infringement of riser system local stress.
The technical solution adopted in the present invention is, a kind of Offshore Drilling Riser comprises upper flange and lower flange with the two flexible devices in middle part, and upper flange is inwardly fixedlyed connected with the straight termination of a main mandrel body by one section person in charge respectively with lower flange;
The wear-resisting end external surface of the arc of each main mandrel body is fixedlyed connected with a pedestal one by a main flexible member respectively; The wear-resisting end inner surface of the arc of the main mandrel body of upper and lower position respectively with the corresponding sliding-contact of a secondary mandrel external surface, the secondary mandrel body inner surface of upper and lower position is fixedlyed connected with a secondary flexible member one respectively; The internal circular surfaces of the secondary flexible member of upper and lower position respectively with a corresponding sliding-contact of wear ring, the wear ring of upper and lower position connects as one;
Outer round surface at the pedestal of upper and lower position is set with a cylinder simultaneously, is fixedly connected with an annular flange respectively in the both ends of the surface of cylinder.
The Offshore Drilling Riser of the present invention two flexible devices in middle part, its characteristics also are:
Radially have the 1-2 exhausting hole on the cylindrical wall.
Contact surface between the wear ring of upper and lower position is provided with sealing ring A; Contact surface between main mandrel body and the secondary mandrel body is provided with sealing ring B.
Also be provided with dashboard on the main mandrel body.
The annular flange of upper and lower position and be separately installed with a stop pin separately between the pedestal.
Wear ring is by the notch interlock up and down, and these two wear ring external surfaces are provided with a common contiguous block simultaneously, and this contiguous block is fixedlyed connected with one of them wear ring by screw.
Upper flange outwards links to each other with the drilling water-separation pipe of upper and lower position is single respectively with lower flange.
The invention has the beneficial effects as follows, adopt major and minor pair of flexible member assembly structure, there is bigger drift angle between two parts drilling water-separation pipe that permission connects is single, allow rigidly connected drilling water-separation pipe system under action of ocean current, to produce bigger flexible drift angle, reduce this place's local stress, avoid riser system because of the excessive problem of damage easily of local stress, guarantee the Offshore Drilling Riser security of system.This apparatus structure is simple, reliable in function, easy to operate.
Description of drawings
Fig. 1 is the structural representation that Offshore Drilling Riser of the present invention is used the two flexible devices in middle part;
Fig. 2 is the operating position schematic diagram that Offshore Drilling Riser of the present invention is used the two flexible device embodiment in middle part;
Fig. 3 is the partial enlarged drawing at the connecting portion I place among Fig. 1.
Among the figure, 1. upper flange 2. is responsible for, 3. dashboard, 4. main mandrel body, 5. annular flange, 6. bolt, 7. pedestal, 8. cylinder, 9. stop pin, 10. main flexible member, 11. secondary mandrel bodies, 12. secondary flexible members, 13. wear ring, 14. contiguous blocks, 15. sealing ring A, 16. screw, 17. sealing ring B, 18. lower flanges.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
With reference to Fig. 1, Fig. 2, the concrete structure of apparatus of the present invention is, upper flange 1, lower flange 18 outwards link to each other with the drilling water-separation pipe of upper and lower position is single respectively, upper flange 1 and lower flange 18 inwardly is responsible for 2 by one section respectively and fixedlyed connected with the straight termination of a main mandrel body 4, and the wear-resisting end external surface of (other end) arc of each main mandrel body 4 passes through a main flexible member 10 respectively fixedlys connected with pedestal 7 one; The wear-resisting end inner surface of the arc of the main mandrel body 4 of upper and lower position respectively with the corresponding sliding-contact of secondary mandrel body 11 external surfaces, secondary mandrel body 11 inner surfaces of upper and lower position are fixedlyed connected with secondary flexible member 12 one respectively; The internal circular surfaces of the secondary flexible member 12 of upper and lower position respectively with the 13 corresponding sliding-contacts of a wear ring (this slide plane can realize slide and seal double action), the wear ring 13 of upper and lower position connects as one; Outer round surface at the pedestal 7 of upper and lower position is set with a cylinder 8 simultaneously, is fixedly connected with an annular flange 5 in the both ends of the surface of cylinder 8 respectively by bolt 6, the annular flange 5 of upper and lower position simultaneously buckle closure on vertical outer face of upper and lower pedestal 7; The annular flange 5 of upper and lower position and be separately installed with a stop pin 9 separately between the pedestal 7 is used for preventing that pedestal 7 and main flexible member 10 from relatively rotating in cylinder 8; Radially have the 1-2 exhausting hole on cylinder 8 walls, be used for the external and internal pressure of balance cylinder 8.
With reference to Fig. 3, the contact surface between the wear ring 13 of upper and lower position is provided with at least one sealing ring A15.The vertical contact surface of main mandrel body 4 between secondary mandrel body 11 is provided with sealing ring B17 at least.Sealing ring A15 and sealing ring B17 be used for to realize the function of insulating sea water and drilling fluid, its quantity can be arranged to two, three, four, five, six etc. a plurality of.
Main mandrel body 4 outer surfaces also are provided with dashboard 3, and dashboard 3 is used for preventing that foreign matter from entering the rotation space of major and minor flexible member assembly that the function that influences flexible member realizes.Dashboard 3 selects for use plastics, rubber or other synthetic nonmetals to make.
The wear ring 13 of the upper and lower position in embodiment illustrated in fig. 3 is for passing through the notch interlock, these two wear ring 13 external surfaces are provided with a common contiguous block 14 simultaneously, contiguous block 14 is fixedlyed connected with one of them wear ring 13 by screw 16, and contiguous block 14 and screw 16 correspondence as required are arranged to a plurality of quantity such as two, three, four, five, six, seven, eight, nine.
The structure of main flexible member 10 and secondary flexible member 12 is, constitutes through sulfuration process by the spherical steel ring (or reinforcing bar) of multilayer stack and the high-performance rubber of sheet, and synthetic rubber provides flexing and wiper seal, and steel ring (or reinforcing bar) provides strength support.
Main mandrel body 4, main flexible member 10 and pedestal 7 adopt sulfuration process to link together; Secondary mandrel body 11 and the secondary flexible member 12 same sulfuration process that adopt link together.Contact surface between main mandrel body 4 and the secondary mandrel body 11 adopts wear-resisting ramp structure to realize freely rotating.
Apparatus of the present invention are installed in the riser system middle part below the drilling water-separation pipe stretching device when working, therefore, in laterally zygomorphic main body, be provided with two groups of master's flexible member assemblies and two groups of secondary flexible member assemblies.Upper flange 1, lower flange 18, two sections persons in charge 2, dashboard 3, annular flange 5 and cylinders 8 constitute main bodys; Comprise that mainly main mandrel body 4, pedestal 7 and main flexible member 10 constitute main flexible member assembly; Comprise that mainly secondary mandrel body 11, secondary flexible member 12, wear ring 13 and contiguous block 14 constitute secondary flexible member assembly.
The operating principle of apparatus of the present invention is:
With explanation embodiment illustrated in fig. 2, when between the drilling water-separation pipe of two parts up and down of upper flange 1 and lower flange 18 connections is single, bigger deflection angle occurring, (upper flange 1, the person in charge 2, main mandrel body 4, secondary mandrel body 11 etc.) parts of the first half rotate to an angle to inhour around its center of rotation (wear ring 13 of the first half), thereby cause main flexible member 10 pressurizeds of the first half, secondary flexible member 12 tensions of the first half.Simultaneously, (upper flange 1, the person in charge 2, main mandrel body 4, secondary mandrel body 11 etc.) parts of the latter half cause main flexible member 10 pressurizeds of the latter half, secondary flexible member 12 tensions of the latter half equally around its center of rotation (wear ring 13 of the latter half) certain angle that turns clockwise.At this moment, rely on the spherical steel ring of main flexible member 10 and secondary flexible member 12 multilayers stack to provide the high-performance rubber of strength support and sheet that elastic deformation is provided, guarantee do not changing under the flexible device agent structure condition of middle part, there is bigger deflection angle between permission is single by the drilling water-separation pipe of two parts up and down of its connection, effectively reduce this place's local buckling stress, alleviated the suffered stress infringement of riser system.
Advantage applies of the present invention is in the following areas:
1) rotational stiffness of major and minor pair of flexible member syndeton of employing makes it more effective than single flexible member aspect compensation drilling water-separation pipe deflection angle, and can adapt to rotation and the deflection of any direction, and damping and damping are good.
2) main part integrated carrying ability is strong, and is simple and compact for structure, and maintenance operation is convenient, has satisfied complicated marine environment drilling well and has required and abominable marine environment load.
3) wear ring 13 can be realized quick replacing, has improved the installation work efficient of two flexible devices; Effectively prevent and reduced wearing and tearing to two flexible devices, guarantee the flexible member operate as normal.
Claims (7)
1. an Offshore Drilling Riser is with the two flexible devices in middle part, its characteristics are: comprise upper flange (1) and lower flange (18), upper flange (1) is inwardly fixedlyed connected with the straight termination of a main mandrel body (4) by one section person in charge (2) respectively with lower flange (18);
The wear-resisting end external surface of the arc of each main mandrel body (4) is fixedlyed connected with a pedestal (7) one by a main flexible member (10) respectively; The wear-resisting end inner surface of arc of the main mandrel body (4) of upper and lower position respectively with the corresponding sliding-contact of a secondary mandrel body (11) external surface, secondary mandrel body (11) inner surface of upper and lower position is fixedlyed connected with a secondary flexible member (12) one respectively; The internal circular surfaces of the secondary flexible member (12) of upper and lower position respectively with the corresponding sliding-contact of a wear ring (13), the wear ring of upper and lower position (13) connects as one;
Outer round surface at the pedestal (7) of upper and lower position is set with a cylinder (8) simultaneously, is fixedly connected with an annular flange (5) respectively in the both ends of the surface of cylinder (8).
2. Offshore Drilling Riser according to claim 1 is with the two flexible devices in middle part, and its characteristics are: radially have the 1-2 exhausting hole on described cylinder (8) wall.
3. Offshore Drilling Riser according to claim 1 is with the two flexible devices in middle part, and its characteristics are: the contact surface between the wear ring of described upper and lower position (13) is provided with sealing ring A(15); Contact surface between main mandrel body (4) and the secondary mandrel body (11) is provided with sealing ring B(17).
4. Offshore Drilling Riser according to claim 1 is with the two flexible devices in middle part, and its characteristics are: also be provided with dashboard (3) on the described main mandrel body (4).
5. Offshore Drilling Riser according to claim 1 is with the two flexible devices in middle part, and its characteristics are: the annular flange of described upper and lower position (5) and be separately installed with a stop pin (9) separately between the pedestal (7).
6. Offshore Drilling Riser according to claim 1 is with the two flexible devices in middle part, its characteristics are: described wear ring (13) up and down is by the notch interlock, this two wear rings (13) external surface is provided with a common contiguous block (14) simultaneously, and this contiguous block (14) is fixedlyed connected with one of them wear ring (13) by screw (16).
7. Offshore Drilling Riser according to claim 1 is with the two flexible devices in middle part, and its characteristics are: described upper flange (1) outwards links to each other with the drilling water-separation pipe of upper and lower position is single respectively with lower flange (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310254157.2A CN103334703B (en) | 2013-06-24 | 2013-06-24 | A kind of Offshore Drilling Riser two flexible device in middle part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310254157.2A CN103334703B (en) | 2013-06-24 | 2013-06-24 | A kind of Offshore Drilling Riser two flexible device in middle part |
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| CN103334703A true CN103334703A (en) | 2013-10-02 |
| CN103334703B CN103334703B (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310254157.2A Active CN103334703B (en) | 2013-06-24 | 2013-06-24 | A kind of Offshore Drilling Riser two flexible device in middle part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483117A (en) * | 2014-12-04 | 2015-04-01 | 宝鸡石油机械有限责任公司 | Fatigue testing method and device for underwater flexible device |
| CN113898297A (en) * | 2021-09-16 | 2022-01-07 | 建湖县永维阀门钻件有限公司 | Subsea production riser protector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4076284A (en) * | 1976-05-05 | 1978-02-28 | Murdock Machine & Engineering Co. | Ocean floor riser connection |
| US5133578A (en) * | 1991-03-08 | 1992-07-28 | Ltv Energy Products Company | Flexible joint with non-diffusive barrier |
| US5951061A (en) * | 1997-08-13 | 1999-09-14 | Continental Emsco Company | Elastomeric subsea flex joint and swivel for offshore risers |
| CN101377121A (en) * | 2008-10-08 | 2009-03-04 | 宝鸡石油机械有限责任公司 | Underwater flexible apparatus for sea well drilling |
| EP2351955A1 (en) * | 2009-07-15 | 2011-08-03 | Oil States Industries, Inc. | Double-ended flexible pipe joint having stacked co-axial primary and secondary annular elastomeric flex elements |
| US20120032434A1 (en) * | 2008-02-25 | 2012-02-09 | Oil States Industries, Inc. | Pressure isolation system for flexible pipe joints |
-
2013
- 2013-06-24 CN CN201310254157.2A patent/CN103334703B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4076284A (en) * | 1976-05-05 | 1978-02-28 | Murdock Machine & Engineering Co. | Ocean floor riser connection |
| US5133578A (en) * | 1991-03-08 | 1992-07-28 | Ltv Energy Products Company | Flexible joint with non-diffusive barrier |
| US5951061A (en) * | 1997-08-13 | 1999-09-14 | Continental Emsco Company | Elastomeric subsea flex joint and swivel for offshore risers |
| US20120032434A1 (en) * | 2008-02-25 | 2012-02-09 | Oil States Industries, Inc. | Pressure isolation system for flexible pipe joints |
| CN101377121A (en) * | 2008-10-08 | 2009-03-04 | 宝鸡石油机械有限责任公司 | Underwater flexible apparatus for sea well drilling |
| EP2351955A1 (en) * | 2009-07-15 | 2011-08-03 | Oil States Industries, Inc. | Double-ended flexible pipe joint having stacked co-axial primary and secondary annular elastomeric flex elements |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483117A (en) * | 2014-12-04 | 2015-04-01 | 宝鸡石油机械有限责任公司 | Fatigue testing method and device for underwater flexible device |
| CN104483117B (en) * | 2014-12-04 | 2017-01-25 | 宝鸡石油机械有限责任公司 | Fatigue testing method and device for underwater flexible device |
| CN113898297A (en) * | 2021-09-16 | 2022-01-07 | 建湖县永维阀门钻件有限公司 | Subsea production riser protector |
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| Publication number | Publication date |
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| CN103334703B (en) | 2015-08-05 |
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Effective date of registration: 20210108 Address after: 721002 No.2 Dongfeng Road, Jintai District, Baoji City, Shaanxi Province Patentee after: Baoji Oilfield Machinery Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC national oil and gas drilling equipment Engineering Technology Research Center Co., Ltd Address before: 721002 No. 2 Dongfeng Road, Shaanxi, Baoji Patentee before: Baoji Oilfield Machinery Co.,Ltd. |