JPS6332218Y2 - - Google Patents
Info
- Publication number
- JPS6332218Y2 JPS6332218Y2 JP3342383U JP3342383U JPS6332218Y2 JP S6332218 Y2 JPS6332218 Y2 JP S6332218Y2 JP 3342383 U JP3342383 U JP 3342383U JP 3342383 U JP3342383 U JP 3342383U JP S6332218 Y2 JPS6332218 Y2 JP S6332218Y2
- Authority
- JP
- Japan
- Prior art keywords
- riser pipe
- ice
- platform
- protection device
- oil drilling
- 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
Links
- 238000005553 drilling Methods 0.000 claims description 12
- 239000005457 ice water Substances 0.000 claims description 6
- 239000013535 sea water Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 101100194816 Caenorhabditis elegans rig-3 gene Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Earth Drilling (AREA)
Description
【考案の詳細な説明】
本考案は氷海石油掘削装置のライザー管保護装
置に関するものである。[Detailed Description of the Invention] The present invention relates to a riser pipe protection device for an ice-water oil drilling rig.
従来、プラツトフオーム底部から海底にライザ
ー管を設けている浮遊式、その他の海上石油掘削
装置を流氷域にて使用する際には、その流氷期の
作業時に、ライザー管に流氷が衝突して破損する
恐れがあり、流氷の当接にも充分耐えうる特殊な
ライザー管を使用するか、またはライザー管を保
護するために大きな保護装置を取付ける必要があ
り、コストが嵩むのみならず、そのような保護装
置に対する波による力の影響が大きくなるという
問題があつた。 Conventionally, when floating type or other offshore oil drilling equipment, which has a riser pipe installed from the bottom of the platform to the seabed, is used in areas of drift ice, drift ice collides with the riser pipe during operations during the ice season. Otherwise, it is necessary to use a special riser pipe that can sufficiently withstand contact with drift ice, or to install a large protective device to protect the riser pipe, which not only increases costs but also prevents such damage. There was a problem in that the influence of wave force on protective equipment increased.
そこで、本考案は前記従来の問題点を解消する
ためになされたものであり、ライザー管には直接
流氷が当らず、しかも波による力の影響の少ない
ライザー管保護装置を提供することを目的とした
ものである。 Therefore, the present invention was devised to solve the above-mentioned conventional problems, and the purpose is to provide a riser pipe protection device that does not allow drift ice to directly hit the riser pipe and is less affected by the force of waves. This is what I did.
即ち、本考案の氷海石油掘削装置のライザー管
保護装置は、プラツトフオーム底部から海底にラ
イザー管を設けている海上石油掘削装置におい
て、そのプラツトフオームの底部から該ライザー
管の周囲を覆うように海水中に突出し、かつその
流氷との当接部が上方より下方の径が小さな上開
きの円錐台形状に形成され、更にその下部が格子
状の下開き円錐台に形成されたライザー管保護装
置を設けることにより構成される。 That is, the riser pipe protection device for an ice-water oil drilling rig of the present invention is designed to cover the periphery of the riser pipe from the bottom of the platform in an offshore oil drilling rig in which the riser pipe is installed from the bottom of the platform to the seabed. A protection riser pipe that protrudes into the seawater and has a truncated conical shape with a smaller diameter at the bottom than the upper part, and the lower part is shaped like a lattice-shaped truncated cone that opens downward. It is constituted by providing a device.
以下図面を参照して本考案の一実施例を説明す
るが、第１図は本考案の実施例の氷海石油掘削装
置の側面図、第２図は第１図のライザー管保護装
置の拡大側面図、第３図は第１図のライザー管保
護装置と各作業水位との関係を示す説明図であ
る。 An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a side view of an ice-water oil drilling rig according to an embodiment of the invention, and Fig. 2 is an enlarged side view of the riser pipe protection device of Fig. 1. 3 are explanatory diagrams showing the relationship between the riser pipe protection device of FIG. 1 and each working water level.
まず、第１図に示すように浮力体１を有するプ
ラツトフオーム２からなるこの浮遊式の氷海石油
掘削装置３は、そのプラツトフオーム２の底部か
ら海底４にライザー管５を設けているが、このプ
ラツトフオーム２の底部からライザー管５の周囲
を覆うように海水Ｗ中に突出したライザー管保護
装置６を設けている。 First, as shown in FIG. 1, this floating ice-water oil drilling rig 3 consists of a platform 2 having a buoyant body 1, and a riser pipe 5 is installed from the bottom of the platform 2 to the seabed 4. A riser pipe protection device 6 is provided from the bottom of the platform 2 so as to protrude into the seawater W so as to cover the riser pipe 5.
このライザー管保護装置６は、第２図の拡大図
に示すごとく、その上部６Ａの流氷７と当接する
部分が上方より下方の径が小さな円錐台形状に形
成されていると共に、その下部６Ｂは格子状の下
開きの円錐台に形成されており、上部６Ａに当接
した流氷７は下方に折り曲げられた後、下部６Ｂ
で更に外方に転向される氷返しになつており、ラ
イザー管保護装置６の内部には流氷７は殆んど侵
入しない。 As shown in the enlarged view of FIG. 2, this riser pipe protection device 6 has a truncated cone shape in which the diameter of the lower part of the upper part 6A that contacts the drift ice 7 is smaller than that of the upper part. It is formed into a lattice-like truncated cone that opens downward, and the drift ice 7 that comes into contact with the upper part 6A is bent downward and then returns to the lower part 6B.
Since the ice is turned further outward, the drift ice 7 hardly enters the inside of the riser pipe protection device 6.
なお、この氷返しを行なう格子状の下部６Ｂの
円錐台部分の角度θは、30゜≦θ≦65゜にすること
が望ましい。 Note that the angle θ of the truncated conical portion of the grid-like lower portion 6B that performs this ice return is desirably 30°≦θ≦65°.
また、この氷海石油掘削装置３の作業水位を第
３図について説明すると、流氷期または流氷域に
おける作業水位はH1で示す状態に位置するよう
にし、一方、開氷期または非流氷域における作業
水位をH2で示す状態にすれば、この場合のライ
ザー管保護装置６は水位H2より上にくることに
なり、たとえＶで示す波があつても下部６Ｂの格
子により波による力の影響が少なくなる。 In addition, to explain the working water level of this ice sea oil drilling rig 3 with reference to Fig. 3, the working water level in the drift ice season or drift ice area is set to be in the state shown by H 1 , while the working water level in the open ice season or in the non-drift ice area is If the water level is set to the state shown by H2 , the riser pipe protection device 6 in this case will be above the water level H2 , and even if there is a wave shown by V, the influence of the force of the wave will be affected by the lattice of the lower part 6B. becomes less.
従つて、本考案のライザー管保護装置を採用す
れば、ライザー管に直接流氷が衝突しないので、
従来の簡便なライザー管をそのまま使用できると
いう利点があり、またライザー管保護装置の下部
には格子状の氷返しを設けたため、その保護装置
内部に流氷の侵入することが殆んどなく、更に、
波による力の影響も少ないという利点がある。 Therefore, if the riser pipe protection device of the present invention is adopted, drift ice will not directly collide with the riser pipe.
It has the advantage that the conventional and simple riser pipe can be used as is, and since a grid-shaped ice return is provided at the bottom of the riser pipe protection device, it is almost impossible for drift ice to enter the inside of the protection device. ,
It has the advantage of being less affected by the force of waves.
特に本考案は、流氷域に使用される浮遊式の氷
海石油掘削装置に対して有効に適用することがで
きる。 In particular, the present invention can be effectively applied to a floating ice oil drilling rig used in drift ice areas.
第１図は本考案の実施例の氷海石油掘削装置の
側面図、第２図は第１図のライザー管保護装置の
拡大側面図、第３図は第１図のライザー管保護装
置と各作業水位との関係を示す説明図である。
２……プラツトフオーム、３……氷海石油掘削
装置、４……海底、５……ライザー管、６……ラ
イザー管保護装置、６Ａ……上部、６Ｂ……下
部、７……流氷、Ｗ……海水。
Figure 1 is a side view of an ice-water oil drilling rig according to an embodiment of the present invention, Figure 2 is an enlarged side view of the riser pipe protection device in Figure 1, and Figure 3 is the riser pipe protection device in Figure 1 and various operations. It is an explanatory diagram showing a relationship with a water level. 2... Platform, 3... Ice sea oil drilling rig, 4... Seabed, 5... Riser pipe, 6... Riser pipe protection device, 6A... Upper part, 6B... Lower part, 7... Drifting ice, W ...Seawater.
Claims (1)
設けている海上石油掘削装置において、そのプラ
ツトフオームの底部から該ライザー管の周囲を覆
うように海水中に突出し、かつその流氷との当接
部が上方より下方の径が小さな上開きの円錐台形
状に形成され、更にその下部が格子状の下開き円
錐台に形成されたライザー管保護装置を設けたこ
とを特徴とする氷海石油掘削装置のライザー管保
護装置。 In offshore oil drilling equipment that has a riser pipe installed from the bottom of the platform to the seabed, the platform protrudes into the seawater from the bottom of the platform to cover the riser pipe, and the part that contacts the drift ice is upward. A riser pipe for an ice-water oil drilling rig, characterized in that the lower diameter is formed in the shape of a truncated cone that opens upward and is further provided with a riser pipe protection device whose lower part is formed in a truncated conical shape that opens downward in the form of a lattice. Protective device.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3342383U JPS59140393U (en) | 1983-03-10 | 1983-03-10 | Riser pipe protection device for ice-water oil drilling rigs |
| NO831427A NO831427L (en) | 1982-10-22 | 1983-04-22 | OFFSHORE OIL DRILLING CONSTRUCTION. |
| FI831402A FI831402L (en) | 1982-10-22 | 1983-04-25 | OLJEBORRNINGSSTRUKTUR |
| CA000426630A CA1197183A (en) | 1982-10-22 | 1983-04-25 | Marine riser protector for use on offshore oil drilling rigs in icy waters |
| US06/490,147 US4505618A (en) | 1982-10-22 | 1983-04-29 | Marine riser protector for use on offshore oil drilling rigs in icy waters |
| NO863035A NO863035D0 (en) | 1982-10-22 | 1986-07-28 | OFFSHORE OIL DRILLING CONSTRUCTION. |
| FI883687A FI883687A0 (en) | 1982-10-22 | 1988-08-08 | OLJEBORRNINGS-OFFSHORESTRUKTION. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3342383U JPS59140393U (en) | 1983-03-10 | 1983-03-10 | Riser pipe protection device for ice-water oil drilling rigs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59140393U JPS59140393U (en) | 1984-09-19 |
| JPS6332218Y2 true JPS6332218Y2 (en) | 1988-08-29 |
Family
ID=30164217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3342383U Granted JPS59140393U (en) | 1982-10-22 | 1983-03-10 | Riser pipe protection device for ice-water oil drilling rigs |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59140393U (en) |
-
1983
- 1983-03-10 JP JP3342383U patent/JPS59140393U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59140393U (en) | 1984-09-19 |
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