JPH04146890A - Flexible riser in crude oil processing and storing ship - Google Patents

Flexible riser in crude oil processing and storing ship

Info

Publication number
JPH04146890A
JPH04146890A JP27182790A JP27182790A JPH04146890A JP H04146890 A JPH04146890 A JP H04146890A JP 27182790 A JP27182790 A JP 27182790A JP 27182790 A JP27182790 A JP 27182790A JP H04146890 A JPH04146890 A JP H04146890A
Authority
JP
Japan
Prior art keywords
flexible riser
crude oil
oil processing
connecting pipe
turret
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.)
Pending
Application number
JP27182790A
Other languages
Japanese (ja)
Inventor
Kazuo Ogawa
和夫 小川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP27182790A priority Critical patent/JPH04146890A/en
Publication of JPH04146890A publication Critical patent/JPH04146890A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent the damage of a flexible riser by connecting a connecting pipe on the upper end of the flexible riser for transporting a crude oil from a submarine oil field to a crude oil processing and storing ship, and attaching a buoy and a collar whose diameters are smaller than the bore of the through hole of a turret to the connecting pipe. CONSTITUTION:A flexible riser 8 provided in a crude oil processing and storing ship has a steel connecting pipe 10 connected through a vent stiffener 9 to its upper end, and a buoy 11 and a collar 12 whose outer diameters are smaller than the bore of plural through holes 5B formed around the moon pool (not shown in a figure) of a turret 5 are fixed to the connecting pipe 10. The upper end of the connecting pipe 10 is connected with a separating device 6 fixed to the turret 5. Thus, even when the crude oil processing and storing ship 4 is rolled by a wind or a tide, or the flexible riser 8 is flowed by the tide, the coller 12 functions to prevent the flexible riser 8 from coming into direct contact with the wall surface of the through hole 5B for preventing the flexible riser 8 and the through hole 5B from suffering damage.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、原油処理貯蔵船におけるフレキシブルライ
ザ、特に、損傷を受けにくいフレキシブルライザに関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a flexible riser in a crude oil processing and storage ship, and particularly to a flexible riser that is not easily damaged.

〔従来の技術〕[Conventional technology]

第2図および第3図に示すように、海底1下数千mの海
底油田からウェル2を通って自噴あるいは人工的に採油
された、水分、ガスを含んだ原油は、海底面からフレキ
シブルライザ8を通って原油処理貯蔵船4上に設置した
原油処理設備(図示せず)に送られる。この原油処理設
備で水分、ガスが除去された原油は、原油処理貯蔵船4
のタンク(図示せず)に貯蔵される。
As shown in Figures 2 and 3, crude oil containing moisture and gas is extracted from an oil field several thousand meters below the seabed through well 2, and is transported from the seabed to a flexible riser. 8 and is sent to a crude oil processing facility (not shown) installed on the crude oil processing and storage ship 4. The crude oil from which water and gas have been removed by this crude oil processing equipment is transported to the crude oil processing storage ship 4.
is stored in a tank (not shown).

フレキシブルライザ3は、1000から5000ps 
iの高圧に耐えられるように設計されている。フレキシ
ブルライザ8の上部は、原油処理貯蔵船4のターレット
5の中央部に形成されたムーンプール5A内に挿入され
ている。フレキシブルライザ8の上端は、ターレット5
に固定された切離し装置6を介して上記原油処理設備に
接続されている。切離し装置6は、原油の暴噴や台風の
襲来時等の緊急事態が発生したときに、原油処理貯蔵船
4を安全な海域に一時的に非難させるために、フレキシ
ブルライザ8をターレット5から切り離す機能を有して
いる。切離し装置6とフレキシブルライザ3とは、フレ
キシブルライザ3に曲げモーメントが作用したときにフ
レキシブルライザ3が破損するのを防止するために、ベ
ントステイフナ−7を介して相互に接続されている。
Flexible riser 3 is 1000 to 5000 ps
It is designed to withstand high pressures of i. The upper part of the flexible riser 8 is inserted into a moon pool 5A formed in the center of the turret 5 of the crude oil processing and storage ship 4. The upper end of the flexible riser 8 is connected to the turret 5.
It is connected to the crude oil processing equipment via a disconnection device 6 fixed to the crude oil processing equipment. The disconnection device 6 disconnects the flexible riser 8 from the turret 5 in order to temporarily evacuate the crude oil processing and storage vessel 4 to a safe sea area in the event of an emergency such as a burst of crude oil or a typhoon. It has a function. The separating device 6 and the flexible riser 3 are connected to each other via a vent stiffener 7 in order to prevent the flexible riser 3 from being damaged when a bending moment is applied to the flexible riser 3.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

原油処理貯蔵船4が風、潮流によって動揺したり、フレ
キシブルライザ8が潮流によって流されると、フレキシ
ブルライザ3は、ターレット5のムーンブール5Aの壁
面に接触し、これによって、フレキシブルライザ3およ
びムーンブール5Aの壁面が損傷を受ける。
When the crude oil processing and storage vessel 4 is shaken by wind or current, or when the flexible riser 8 is washed away by the current, the flexible riser 3 comes into contact with the wall surface of the moon boule 5A of the turret 5, and as a result, the flexible riser 3 and the moon boule The wall of 5A is damaged.

上述したように、−本のフレキシブルライザ3がターレ
ット5のムーンブール5A内に挿入されているときには
、たとえ、原油処理貯蔵船4が風、潮流によって動揺し
たり、フレキシブルライザ3が潮流によって流されても
、ムーンブール5Aの内径が大きいので、フレキシブル
ライザ8がムーンブール5Aの壁面に接触して、フレキ
シブルライザ3およびムーンブール5Aの壁面が損傷す
る虞れはないが、複数本のフレキシブルライザ3を、第
4図に示すように、ムーンブール5Aの周囲に設けた貫
通孔5B内に挿入する場合に、次のような問題が生じる
。即ち、貫通孔5Bの内径はムーンブール5Aの内径に
比べて小さいので、原油処理貯蔵船4等の動揺によって
フレキシブルライザ3が貫通孔5Bの壁面に接触しやす
い。
As mentioned above, when one flexible riser 3 is inserted into the moon boule 5A of the turret 5, even if the crude oil processing and storage ship 4 is shaken by wind or current, or the flexible riser 3 is washed away by the current. However, since the inner diameter of the moon boule 5A is large, there is no risk of the flexible riser 8 coming into contact with the wall surface of the moon boule 5A and damaging the flexible riser 3 and the wall surface of the moon boule 5A. When inserting into the through hole 5B provided around the moon boule 5A as shown in FIG. 4, the following problem occurs. That is, since the inner diameter of the through hole 5B is smaller than the inner diameter of the moon boule 5A, the flexible riser 3 is likely to come into contact with the wall surface of the through hole 5B due to the movement of the crude oil processing and storage ship 4 or the like.

従って、この発明の目的は、原油処理貯蔵船4の動揺等
によって損傷を受けにくい、原油処理貯蔵船におけるフ
レキシブルライザを提供することにある。
Therefore, an object of the present invention is to provide a flexible riser for a crude oil processing and storage ship that is less susceptible to damage due to the movement of the crude oil processing and storage ship 4 and the like.

〔課題を解決するための手段〕[Means to solve the problem]

この発明は、海底油田からの原油を海上の原油処理貯蔵
船まで輸送するための、上部が前記原油処理貯蔵船のタ
ーレットに形成された貫通孔内に挿入されるフレキシブ
ルライザであって、前記フレキシブルライザの上端には
、ベントステイフナ−を介して連結パイプが接続され、
前記連結パイプには、前記フレキシブルライザに浮力を
付与するためのブイと、前記フレキシブルライザおよび
前記ターレットが損傷するのを防止するためのカラーが
固定されており、前記ブイおよび前記カラーの外径は、
前記貫通孔の内径より小さいことに特徴を有するもので
ある。
The present invention is a flexible riser whose upper part is inserted into a through hole formed in a turret of a crude oil processing and storage ship for transporting crude oil from an offshore oil field to an offshore crude oil processing and storage ship, A connecting pipe is connected to the upper end of the riser via a vent stiffener.
A buoy for imparting buoyancy to the flexible riser and a collar for preventing damage to the flexible riser and the turret are fixed to the connecting pipe, and the outer diameters of the buoy and the collar are ,
It is characterized in that it is smaller than the inner diameter of the through hole.

次に、この発明の、原油処理貯蔵船におけるフレキシブ
ルライザの一実施態様を、図面を参照しながら説明する
Next, one embodiment of a flexible riser for a crude oil processing and storage ship according to the present invention will be described with reference to the drawings.

第1図は、この発明の、原油処理貯蔵船におけるフレキ
シブルライザの一実施態様を示す部分断面図である。
FIG. 1 is a partial sectional view showing one embodiment of a flexible riser for a crude oil processing and storage ship according to the present invention.

第1図に示すように、この発明の、原油処理貯蔵船にお
けるフレキシブルライザ8は、その上端部に従来と同様
のベントステイフナ−9を介して鋼製連結パイプ10が
接続され、連結パイプ10には、ターレット5のムーン
ブール(図示せず)の周囲に複数個形成された貫通孔5
Bの内径より小さい外径を有するブイ11およびカラー
12が固定されているものである。連結パイプ10の上
端は、ターレット5に固定された、従来と同様の切離し
装置6に接続されている。
As shown in FIG. 1, a flexible riser 8 for a crude oil processing and storage ship according to the present invention has a steel connecting pipe 10 connected to its upper end via a conventional vent stiffener 9. A plurality of through holes 5 are formed around the moon boule (not shown) of the turret 5.
A buoy 11 and a collar 12 having an outer diameter smaller than the inner diameter of B are fixed. The upper end of the connecting pipe 10 is connected to a conventional disconnecting device 6 fixed to the turret 5.

ブイ11の外径は、貫通孔5Bの内径より若干小さい。The outer diameter of the buoy 11 is slightly smaller than the inner diameter of the through hole 5B.

従って、ブイ11は、貫通孔5B内を自在に上下動する
。ブイ11は、浮力効果が高いポリウレタン等によって
作られている。ブイ11は、フレキシブルライザ8の切
離し後、フレキシブルライザ8の上端が海面下数十mの
位置で浮遊するような浮力を有している。
Therefore, the buoy 11 freely moves up and down within the through hole 5B. The buoy 11 is made of polyurethane or the like, which has a high buoyancy effect. The buoy 11 has such buoyancy that after the flexible riser 8 is separated, the upper end of the flexible riser 8 floats at a position several tens of meters below the sea surface.

カラー12は、連結バイブ10の下端に固定されている
。カラー12の外径は、ブイ11と同様に貫通孔5Bの
内径より若干小さい。従って、カラー12は、貫通孔5
B内を自在に上下動する。カラー12は、円板状の鋼板
の周囲に、貫通孔5Bの壁面との接触による影響を少な
くするためにゴム皮膜を形成したものからなっている。
The collar 12 is fixed to the lower end of the connecting vibe 10. Like the buoy 11, the outer diameter of the collar 12 is slightly smaller than the inner diameter of the through hole 5B. Therefore, the collar 12
Move up and down freely within B. The collar 12 is made of a disc-shaped steel plate with a rubber coating formed around it in order to reduce the influence of contact with the wall surface of the through hole 5B.

カラー12は、連結バイブ10に複数個固定しても良い
A plurality of collars 12 may be fixed to the connecting vibrator 10.

このように構成されている、この発明の、原油処理貯蔵
船におけるフレキシブルライザによれば、原油処理貯蔵
船4が風、潮流によって動揺したり、フレキシブルライ
ザ8が潮流によって流されても、連結パイプ10に取り
付けられたカラー12の作用によって、フレキシブルラ
イザ8が貫通孔5Bの壁面に直接、接触しない。これに
よって、フレキシブルライザ8および貫通孔5Bは損傷
を受けない。
According to the flexible riser for a crude oil processing and storage ship of the present invention configured in this manner, even if the crude oil processing and storage ship 4 is shaken by wind or current, or the flexible riser 8 is washed away by the current, the connecting pipe Due to the action of the collar 12 attached to the flexible riser 8, the flexible riser 8 does not come into direct contact with the wall surface of the through hole 5B. As a result, the flexible riser 8 and the through hole 5B are not damaged.

切+11し装置6によってフレキシブルライザ8をター
レット5から切り離した後、フレキシブルライザ8は、
ブイ11による浮力によって海底までは沈まない。従っ
て、作業を再開するときのフレキシブルライザ8の切離
し装置6への接続作業が容易に行える。
After the flexible riser 8 is separated from the turret 5 by the cutting device 6, the flexible riser 8 is
The buoyancy of buoy 11 prevents it from sinking to the sea floor. Therefore, the work of connecting the flexible riser 8 to the disconnection device 6 when restarting the work can be easily performed.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明によれば、カラーの作用
によって、原油処理貯蔵船の動揺等によりフレキシブル
ライザは損傷を受けに((、しかも、ブイの作用によっ
て、フレキシブルライザの切離し装置への接続作業が容
易に行えるといった有用、効果が得られる。
As explained above, according to the present invention, the action of the collar prevents the flexible riser from being damaged due to the movement of the crude oil processing and storage ship. Useful effects such as making work easier can be obtained.

\

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、この発明の、原油処理貯蔵船におけるフレキ
シブルライザの一実施態様を示す部分断面図、第2図は
、原油を海底油田から原油処理貯蔵船に輸送している状
態を示す正面図、第8図は一本のフレキシブルライザを
ターレットに挿入した状態を示す断面図、第4図は、複
数本のフレキシブルライザをターレットに挿入した状態
を示す断面図である。図面において、 1−・−海底、 2−・−ウェル、 3.8−・−フレキシブルライザ、 4−原油処理貯蔵船、 5−・・ターレット、 6−切離し装置、 7.9−ベントステイフナ− 10−・一連結バイブ。 −一一
FIG. 1 is a partial sectional view showing an embodiment of the flexible riser in a crude oil processing and storage ship according to the present invention, and FIG. 2 is a front view showing a state in which crude oil is being transported from an offshore oil field to a crude oil processing and storage ship. , FIG. 8 is a sectional view showing a state in which one flexible riser is inserted into the turret, and FIG. 4 is a sectional view showing a state in which a plurality of flexible risers are inserted into the turret. In the drawings, 1-- seabed, 2-- well, 3.8-- flexible riser, 4- crude oil processing and storage vessel, 5-- turret, 6- disconnection device, 7.9- vent stiffener. 10-・Series of vibrators. -11

Claims (1)

【特許請求の範囲】[Claims] (1)海底油田からの原油を海上の原油処理貯蔵船まで
輸送するための、上部が前記原油処理貯蔵船のターレツ
トに形成された貫通孔内に挿入されるフレキシブルライ
ザであって、前記フレキシブルライザの上端には、ベン
トスティフナーを介して連結パイプが接続され、前記連
結パイプには、前記フレキシブルライザに浮力を付与す
るためのブイと、前記フレキシブルライザおよび前記タ
ーレツトが損傷するのを防止するためのカラーが固定さ
れており、前記ブイおよび前記カラーの外径は、前記貫
通孔の内径より小さいことを特徴とする、原油処理貯蔵
船におけるフレキシブルライザ。
(1) A flexible riser whose upper part is inserted into a through hole formed in the turret of the crude oil processing and storage ship for transporting crude oil from an offshore oil field to an offshore crude oil processing and storage ship, the flexible riser A connecting pipe is connected to the upper end via a vent stiffener, and the connecting pipe includes a buoy for imparting buoyancy to the flexible riser and a buoy for preventing damage to the flexible riser and the turret. A flexible riser for a crude oil processing and storage ship, characterized in that a collar is fixed, and the outer diameters of the buoy and the collar are smaller than the inner diameter of the through hole.
JP27182790A 1990-10-09 1990-10-09 Flexible riser in crude oil processing and storing ship Pending JPH04146890A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27182790A JPH04146890A (en) 1990-10-09 1990-10-09 Flexible riser in crude oil processing and storing ship

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27182790A JPH04146890A (en) 1990-10-09 1990-10-09 Flexible riser in crude oil processing and storing ship

Publications (1)

Publication Number Publication Date
JPH04146890A true JPH04146890A (en) 1992-05-20

Family

ID=17505411

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27182790A Pending JPH04146890A (en) 1990-10-09 1990-10-09 Flexible riser in crude oil processing and storing ship

Country Status (1)

Country Link
JP (1) JPH04146890A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002537171A (en) * 1999-02-16 2002-11-05 デル プール,ハンス ファン Floating offshore structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002537171A (en) * 1999-02-16 2002-11-05 デル プール,ハンス ファン Floating offshore structure

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