CN111894488A - Riser hangs fixing device - Google Patents
Riser hangs fixing device Download PDFInfo
- Publication number
- CN111894488A CN111894488A CN202010730425.3A CN202010730425A CN111894488A CN 111894488 A CN111894488 A CN 111894488A CN 202010730425 A CN202010730425 A CN 202010730425A CN 111894488 A CN111894488 A CN 111894488A
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- Prior art keywords
- riser
- hole
- hydraulic cylinder
- joint
- cavity
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 10
- 239000000725 suspension Substances 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 10
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
- E21B19/004—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform
- E21B19/006—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform including heave compensators
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a riser hanging and fixing device which comprises a riser joint, an annular hydraulic cylinder and a fixing mechanism, wherein a riser connected with the riser joint penetrates through a central through hole of the annular hydraulic cylinder, so that the annular hydraulic cylinder and the riser joint are simultaneously connected with the fixing mechanism; the riser joint is fixedly connected with the top of the riser and comprises at least one connecting piece which is connected with the fixing mechanism in a matching way; the annular hydraulic cylinder comprises a cavity for containing hydraulic oil and a piston arranged in the cavity; the connecting piece and the piston are fixedly connected through a fixing mechanism. The invention replaces a plurality of uniformly distributed independent hydraulic cylinders with the annular hydraulic cylinders, thereby preventing the risk of overturning when the individual hydraulic cylinders are invalid or the motions are asynchronous. Meanwhile, the marine riser joint is arranged to fix the marine riser, and the marine riser and the annular hydraulic cylinder are fixedly connected through the connecting mechanism, so that the marine riser hydraulic cylinder is simple in structure and convenient to operate, and the marine riser can be quickly connected with the annular hydraulic cylinder.
Description
Technical Field
The invention relates to a suspension device, in particular to a riser suspension fixing device.
Background
The suspension of the deepwater drilling riser is generally realized by a special riser suspension flange, in order to deal with the dynamic load generated by the movement of a drilling ship caused by waves on the suspension riser, a plurality of passive hydraulic cylinders are uniformly distributed at the bottom of the riser suspension flange to buffer the dynamic load of the suspension riser, and under the severe sea condition, if the heave capacity of the drilling ship is large, the passive buffer compensation scheme has a poor effect, and the plurality of uniformly distributed hydraulic cylinders can possibly cause the inclination of an upper flange thereof and generate a transverse load if one hydraulic cylinder fails or moves asynchronously under the severe sea condition, so that a certain overturning risk exists.
Disclosure of Invention
The invention aims to solve the technical problem of providing a riser hanging and fixing device aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the marine riser hanging and fixing device comprises a marine riser joint fixedly connected with the top end of a marine riser, an annular hydraulic cylinder with a central through hole penetrating through the center from bottom to top, and a fixing mechanism for connecting the marine riser joint and the annular hydraulic cylinder, wherein the marine riser connected with the marine riser joint is arranged in the central through hole, and the annular hydraulic cylinder and the marine riser joint are simultaneously connected with the fixing mechanism;
the riser joint is fixedly connected with the top of the riser and comprises at least one connecting piece which is connected with the fixing mechanism in a matching way;
the annular hydraulic cylinder comprises a cavity for containing hydraulic oil and a piston which is arranged in the cavity and can move relative to the cavity along the axial direction;
the connecting piece and the piston are fixedly connected through the fixing mechanism.
Preferably, the piston comprises a piston body arranged in the cavity and immersed in the hydraulic oil, and a piston head arranged outside the cavity, the piston body is fixedly connected with the piston head, and the piston head extends out of the top of the cavity.
Preferably, the central through hole diameter is greater than the riser joint diameter;
the central through hole comprises a first through hole arranged in the center of the cavity and a second through hole arranged in the center of the piston head, and the first through hole and the second through hole are communicated along the extending direction of the first through hole.
Preferably, the connecting piece is a first flange, the piston head is a second flange, the fixing mechanism comprises a first step and a second step which are correspondingly inserted with the first flange and the second flange respectively, and the first step is arranged above the second step in parallel.
Preferably, the fixing mechanism is an open structure and comprises at least one notch for exposing the first step and the second step, and the first flange and the second flange are respectively inserted into the first step and the second step through the notch.
Preferably, the notch angle is greater than 0 ° and less than 180 °
Preferably, the fixing mechanism further comprises an accommodating cavity for accommodating the riser joint, and the accommodating cavity is coaxial with the central through hole;
the fixing mechanism comprises at least two chucks which are oppositely arranged, the chucks are provided with the first step and the second step, and the chucks are oppositely arranged at least two so that the first step and the second step form a closed disc.
Preferably, two adjacent chucks are fixedly connected through a connecting mechanism, and the connecting mechanism is a detachable connecting mechanism.
Preferably, the riser joint further comprises a lifting member arranged above the connecting member, and the lifting member extends out of the top surface of the fixing mechanism.
Preferably, the lifting member is a third flange, the third flange having the same diameter as the first flange.
The invention has the following beneficial effects: the invention replaces a plurality of uniformly distributed independent hydraulic cylinders with the annular hydraulic cylinders, thereby preventing the risk of overturning when the aging or the movement of individual hydraulic cylinders is asynchronous. Meanwhile, the marine riser joint is arranged to fix the marine riser, and the marine riser and the annular hydraulic cylinder are fixedly connected through the connecting mechanism, so that the marine riser hydraulic cylinder is simple in structure and convenient to operate, and the marine riser can be quickly connected with the annular hydraulic cylinder.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a longitudinal cross-sectional view of a securing mechanism in accordance with a first embodiment of the invention;
FIG. 3 is a top view of the securing mechanism in a first embodiment of the invention;
FIG. 4 is a longitudinal cross-sectional view of a second embodiment of a securing mechanism of the present invention;
FIG. 5 is a top view of a prescribed mechanism in a second embodiment of the invention;
fig. 6 is a schematic structural diagram of the present invention when performing motion compensation.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The riser hanging and fixing device provided by the invention can comprise a riser joint 10 fixedly connected with the top end of a riser, an annular hydraulic cylinder 20 with a through central through hole 21 arranged in the center from bottom to top, and a fixing mechanism 30 connected with the riser joint 10 and the annular hydraulic cylinder 20, wherein a riser connected with the riser joint 10 can penetrate through the central through hole 21 of the annular hydraulic cylinder 20, so that the annular hydraulic cylinder 20 and the riser joint 10 can be simultaneously connected with the fixing mechanism 30 to realize axial motion buffering and compensation of the riser.
Specifically, in the present invention, the annular hydraulic cylinder 20 specifically includes a cavity 22 for containing hydraulic oil therein, and a piston 23 disposed in the cavity 22, where the piston 23 is preferably annular and can move up and down along an axial direction relative to the cavity 22, in some implementations, the piston 23 includes a piston body 231 disposed in the cavity 22 and immersed in the hydraulic oil, and a piston head 232 disposed outside the cavity 22, the piston head 232 extends from the top of the cavity 22, and the piston head 232 is fixedly connected to the piston body 231. In some embodiments, the piston 23 disposed in the cavity 22 can be lifted to a designated height by hydraulic oil, in the present invention, the annular hydraulic cylinder 20 is provided with a central through hole 21 penetrating from bottom to top, wherein the cavity 22 is preferably an annular cavity 22, the piston 23 is disposed coaxially with the cavity 22, and in some embodiments, the diameter of the central through hole 21 is larger than that of the riser joint 10, so as to allow the riser with the riser joint 10 installed to pass through while accommodating the riser.
Further, in some embodiments, the riser joint 10 includes a joint body 11 fixedly connected with the riser, and a connecting member 12 connected with the fixing mechanism 30, in some embodiments, the joint body 11 is cylindrical, and the connecting member 12 protrudes out of the outer wall of the joint body 11 for connecting with the fixing mechanism 30. In the present invention, the joint body 11 and the riser may be connected by a screw joint, a snap joint, or other detachable connection, which is not limited in the present invention.
In some embodiments, riser joint 10 and piston head 232 are connected by a securing mechanism 30 to enable synchronized movement of the riser and piston 23. In some embodiments, the connector 12 is a first flange, the piston head 232 is a second flange, and the fixing mechanism 30 comprises a first step 31 and a second step 32 respectively inserted into the first flange and the second flange, preferably the first step 31 and the second step 32 are arranged in parallel to define the orientation of the piston 23 and the riser, and to prevent the riser from tilting relative to the piston 23 and colliding with the annular hydraulic cylinder 20.
In some embodiments, since the end of the riser far from the riser joint 10 is usually provided with a blowout preventer with a larger size, and the riser with the blowout preventer cannot directly pass through the central through hole 21 of the annular hydraulic cylinder 20, the riser with the riser joint 10 is lifted up from the bottom of the annular hydraulic cylinder 20, and after passing through the central through hole 21, the riser is fixedly connected with the piston head 232 through the fixing mechanism 30, in order to make the riser with the riser joint 10 smoothly pass through the central through hole 21, it is preferable that the diameter of the central through hole 21 is larger than the maximum diameter of the riser joint 10, and in some embodiments, the largest diameter of the riser joint 10 is the connecting piece 12, i.e. the central through hole 21 has a larger diameter than the connecting element 12, in some embodiments the connecting element 12 is arranged above the piston head 232, i.e. in the securing mechanism 30 the first step 31 is arranged parallel above the second step 32.
As a first embodiment of the present invention, referring to fig. 2-3, the fixing mechanism 30 is an open fixing mechanism, i.e. at least one notch is provided, which completely penetrates the fixing mechanism 30 along the axial direction, and is used for exposing the first step 31 and the second step 32, i.e. the first step 31 and the second step 32 are both fan-shaped structures provided with notches, so as to facilitate the insertion of the connector 12 and the piston head 232, and in some embodiments, the angle of the notch is preferably in the range of 0 ° to 180 ° to prevent the connector 12 and the piston head 232 from being too large to be stably inserted. The lifting device enables the riser to hover to a preset height by lifting the riser joint 10, drives the piston 23 to a specified height by hydraulic oil, then puts the open type fixing mechanism 30 on the annular hydraulic cylinder 20, and plugs the first step 31 and the second step 32 with the connecting piece 12 and the piston head 232 in place respectively, so that the assembly of the fixing mechanism 30, the riser joint 10 and the annular hydraulic cylinder 20 is completed. When the system which is assembled is required to be integrally lifted, the lifting device can be fixedly connected with the connecting piece 12 through the notch, or a connecting device such as a lifting ring is arranged on the fixing mechanism 30 and is directly connected with the fixing mechanism 30, so that the lifting of the integral system is completed, referring to fig. 6, when the annular hydraulic cylinder is used for axial motion compensation, the piston 23 and the marine riser joint 10 are connected into a whole through the fixing mechanism 30, the suspended marine riser moves up and down along with the piston 23, and the compensation of the axial motion of the suspended marine riser is realized.
As a second embodiment of the present invention, in order to prevent the riser joint 10 and the piston 23 in the first embodiment from coming out of the fixing mechanism 30 from the gap, in this embodiment, it is preferable that the fixing mechanism 30 includes a plurality of chucks 34 disposed opposite to each other, each chuck 34 is provided with a first step 31 and a second step 32, and after the plurality of chucks 34 disposed opposite to each other are closed, the first step 31 and the second step 32 form a closed disk, so as to prevent the piston 23 and the riser joint 10 from falling off from the fixing mechanism 30. In some embodiments, referring to fig. 4-5, the fixing mechanism 30 preferably comprises two opposing chucks 34, each chuck 34 having a first step 31 and a second step 32 that are each semicircular, and when the two chucks 34 are mated, the first step 31 and the second step 32 are both closed to form a complete circular disk. In some embodiments, a connecting mechanism 35 for fixing the chucks 34 is further disposed between two adjacent chucks 34, and preferably, the connecting mechanism 35 is a detachable mechanism, i.e., the two chucks 34 are detachably connected, and in some embodiments, the connecting mechanism 35 may be a snap connection. Further, an accommodating cavity 33 for accommodating the riser joint 10 is further provided between the plurality of chucks 34, the riser joint 10 further includes a lifting member 13 extending from the accommodating cavity 33 to the outside of the fixing mechanism 30, and preferably, the lifting member 13 is provided above the connecting member 12 for connecting with a lifting device to perform lifting, hovering and other operations. In some embodiments, it is preferable that the lifting member 13 is a third flange and is spaced above the connecting member 12, wherein the connecting member 12 is fixedly connected to the first step 31, and the lifting member 13 extends from the accommodating cavity 33 to the top surface of the fixing mechanism 30. In this embodiment, the central through hole 21 of the annular hydraulic cylinder 20 includes a first through hole 211 provided in the center of the annular cavity 22 and a second through hole 212 provided in the center of the piston head 232, and the first through hole 211 and the second through hole 212 are communicated in the extending direction of the first through hole 211. In some embodiments, the first and second through holes 211, 212 are the same diameter and are each larger than the largest diameter of the connector 12 and the riser 13, facilitating passage of the riser joint 10. Further, in the fixing mechanism 30, the first step 31 is disposed above the second step 32 in parallel, in some embodiments, when the riser joint 10 and the annular hydraulic cylinder 20 need to be assembled, the lifting device is fixedly connected to the lifting member 13 to lift and suspend the riser joint 10 together with the riser to a preset height, meanwhile, the piston 23 is driven to a specified height by hydraulic oil, the two chucks 34 disposed opposite to each other are placed on the annular hydraulic cylinder 20 to push the two chucks 34 to move toward each other to close, so that the first step 31 and the second step 32 are respectively inserted into the connecting member 12 and the piston head 232, in some embodiments, the two chucks 34 may also be fixedly connected to each other by the connecting mechanism 35, and the phenomenon that the chucks 34 are displaced during operation to cause the riser joint 10 or the piston head 232 to fall off is prevented. Referring to fig. 6, when the assembled system needs to be lifted integrally, the lifting device may be fixedly connected to the lifting member 13 of the riser joint 10, so as to complete the lifting of the integrated system, and when the annular hydraulic cylinder is performing axial motion compensation, the piston 23 and the riser joint 10 are connected into a whole through the fixing mechanism 30, so that the suspension riser moves up and down along with the piston 23, and the compensation of the axial motion of the suspension riser is realized.
In fig. 1 and 6, although a riser and a blowout preventer are included, it is understood that the riser and blowout preventer are shown only for illustrative purposes and are not within the scope of the present invention.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A riser hanging and fixing device is characterized by comprising a riser joint (10) fixedly connected with the top end of a riser, an annular hydraulic cylinder (20) with a center through hole (21) penetrating through the center from bottom to top, and a fixing mechanism (30) for connecting the riser joint (10) with the annular hydraulic cylinder (20), wherein the riser connected with the riser joint (10) is arranged in the center through hole (21), and the annular hydraulic cylinder (20) and the riser joint (10) are simultaneously connected with the fixing mechanism (30);
the marine riser joint (10) is fixedly connected with the top of the marine riser, and the marine riser joint (10) comprises at least one connecting piece (12) which is connected with the fixing mechanism (30) in a matched manner;
the annular hydraulic cylinder (20) comprises a cavity (22) containing hydraulic oil and a piston (23) which is arranged in the cavity (22) and can move relative to the cavity (22) along the axial direction;
the connecting piece (12) and the piston (23) are fixedly connected through the fixing mechanism (30).
2. The riser suspension fixing device according to claim 1, wherein the piston (23) comprises a piston body (231) disposed in the cavity (22) and immersed in the hydraulic oil, and a piston head (232) disposed outside the cavity (22), the piston body (231) is fixedly connected with the piston head (232), and the piston head (232) extends out of the top of the cavity (22).
3. Riser suspension fixture according to claim 2, wherein the central through hole (21) has a diameter larger than the riser joint (10);
the central through hole (21) comprises a first through hole (211) arranged in the center of the cavity (22) and a second through hole (212) arranged in the center of the piston head (232), and the first through hole (211) and the second through hole (212) penetrate along the extending direction of the first through hole (211).
4. Riser hanging fixture according to claim 1, wherein the connector (12) is a first flange, the piston head (232) is a second flange, the fixture (30) comprises a first step (31) and a second step (32) respectively plugged with the first flange and the second flange, the first step (31) is arranged in parallel above the second step (32).
5. Riser suspension fixture according to claim 4, wherein the fixture (30) is an open structure comprising at least one notch for exposing the first step (31) and the second step (32), through which the first flange and the second flange are plugged with the first step (31) and the second step (32), respectively.
6. The riser suspension fixture of claim 5 wherein the notch angle is greater than 0 ° and less than 180 °.
7. Riser hanging fixture according to claim 4, characterized in that said fixture means (30) comprises at least two oppositely arranged chucks (34), said chucks (34) each having said first step (31) and said second step (32) provided thereon, said at least two chucks (34) being brought together such that said first step (31) and said second step (32) each form a closed disc;
a plurality of still be equipped with between chuck (34) and hold chamber (33) that hold riser joint (10), hold chamber (33) with central through-hole (21) coaxial setting.
8. Riser suspension fixture according to claim 7, wherein two adjacent chucks (34) are fixedly connected by a connecting mechanism (35), and the connecting mechanism (35) is a detachable connecting mechanism.
9. Riser hanging fixture according to claim 7, characterised in that the riser joint (10) further comprises a lifting member (13) arranged above the connector (12), the lifting member (13) protruding from the top surface of the fixture (30).
10. Riser suspension fixture according to claim 9, characterized in that the riser (13) is a third flange having the same diameter as the first flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010730425.3A CN111894488A (en) | 2020-07-27 | 2020-07-27 | Riser hangs fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010730425.3A CN111894488A (en) | 2020-07-27 | 2020-07-27 | Riser hangs fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111894488A true CN111894488A (en) | 2020-11-06 |
Family
ID=73191049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010730425.3A Pending CN111894488A (en) | 2020-07-27 | 2020-07-27 | Riser hangs fixing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111894488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622847A (en) * | 2021-09-16 | 2021-11-09 | 中海石油(中国)有限公司 | Flexible suspension device for drilling riser and operation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005071221A1 (en) * | 2004-01-23 | 2005-08-04 | Enovate Systems Limited | Completion suspension valve system |
| CN103038438A (en) * | 2010-06-30 | 2013-04-10 | 阿克Mh股份有限公司 | A method and a system for controlling movements of a free-hanging tubular |
| WO2016062812A1 (en) * | 2014-10-24 | 2016-04-28 | Itrec B.V. | Offshore drilling system, vessel and method |
| CN107191145A (en) * | 2017-07-17 | 2017-09-22 | 中国海洋石油总公司 | A kind of marine riser suspension special-purpose nipple and its application method |
| CN111043111A (en) * | 2019-12-09 | 2020-04-21 | 中国海洋石油集团有限公司 | Hydraulic system for reducing axial dynamic load of floating drilling platform suspension riser |
| CN212927749U (en) * | 2020-07-27 | 2021-04-09 | 中国海洋石油集团有限公司 | Riser hangs fixing device |
-
2020
- 2020-07-27 CN CN202010730425.3A patent/CN111894488A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005071221A1 (en) * | 2004-01-23 | 2005-08-04 | Enovate Systems Limited | Completion suspension valve system |
| CN103038438A (en) * | 2010-06-30 | 2013-04-10 | 阿克Mh股份有限公司 | A method and a system for controlling movements of a free-hanging tubular |
| WO2016062812A1 (en) * | 2014-10-24 | 2016-04-28 | Itrec B.V. | Offshore drilling system, vessel and method |
| CN107191145A (en) * | 2017-07-17 | 2017-09-22 | 中国海洋石油总公司 | A kind of marine riser suspension special-purpose nipple and its application method |
| CN111043111A (en) * | 2019-12-09 | 2020-04-21 | 中国海洋石油集团有限公司 | Hydraulic system for reducing axial dynamic load of floating drilling platform suspension riser |
| CN212927749U (en) * | 2020-07-27 | 2021-04-09 | 中国海洋石油集团有限公司 | Riser hangs fixing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622847A (en) * | 2021-09-16 | 2021-11-09 | 中海石油(中国)有限公司 | Flexible suspension device for drilling riser and operation method thereof |
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