CN109385921B

CN109385921B - Steel wire rope of riser tensioner and rope threading method thereof

Info

Publication number: CN109385921B
Application number: CN201710693215.XA
Authority: CN
Inventors: 陈香润; 高辉; 刘业文; 关成刚; 马永波; 张益铭
Original assignee: Shanghai Waigaoqiao Shipbuilding Offshore Engineering Project Management Co ltd
Current assignee: Shanghai Waigaoqiao Shipbuilding Offshore Engineering Project Management Co.,Ltd.
Priority date: 2017-08-14
Filing date: 2017-08-14
Publication date: 2022-04-01
Anticipated expiration: 2037-08-14
Also published as: CN109385921A

Abstract

The invention discloses a steel wire rope of a riser tensioner and a threading method thereof. The rope body is provided with a free rope end; the fixing ring is fixed on the end face of the free rope end; the envelope bag wraps the free rope end; the connector link with envelope bag is connected, simultaneously the connector link with gu fixed ring is connected. The steel wire rope of the riser tensioner and the rope threading method thereof increase the safety and reliability of rope threading and save a large amount of materials and time.

Description

Steel wire rope of riser tensioner and rope threading method thereof

Technical Field

The invention relates to a steel wire rope of a riser tensioner and a threading method thereof.

Background

On offshore drilling platforms, riser compensating systems in the form of wire lines are often used. In the process of threading, because the diameter of the steel wire rope is large, the distance required to be dragged is high, the stroke is large, and various influence factors in the process of threading need to be considered in the actual threading process. In the process of threading, because one end of the steel wire rope is already provided with a large connecting shackle, only the other end of the steel wire rope is treated to carry out proper treatment for threading. The traditional threading technology is to weave a leader into a threaded steel wire rope. In this method, the length of the braid is varied according to the wire rope to be threaded. If the method is adopted to penetrate through the steel wire rope of the water pipe tensioner, the length of the steel wire rope is not less than 7 meters, and thus, enough friction force can be obtained. After the steel wire rope is threaded, the braided steel wire rope cannot be used. This method is time consuming, labor intensive, and material intensive.

Disclosure of Invention

The invention aims to overcome the defects that threading wastes time and labor and wastes materials in the prior art, and provides a steel wire rope of a riser tensioner and a threading method thereof.

The invention solves the technical problems through the following technical scheme:

a riser tensioner steel wire rope is characterized by comprising:

a rope body having a free rope end;

the fixing ring is fixed on the end face of the free rope end;

the envelope bag wraps the free rope end;

the connector link, the connector link with the envelope bag is connected, simultaneously the connector link with gu fixed ring connects.

By comprehensively using the enveloping bag and the fixing ring, the strength of the connection between the free rope end and the guide rope is greatly improved, and simultaneously, a large amount of materials and time are saved.

Preferably, the riser tensioner cable further comprises at least one tie wrapped around the envelope bag for securing the envelope bag to the rope. The use of the ribbon can further increase the friction force between the envelope bag and the steel wire rope and prevent the envelope bag and the rope body from sliding relatively.

Preferably, the end of the envelope bag is provided with a plurality of ribs, and the plurality of ribs extend out of the free rope end. The ribs help increase the tensile strength of the end of the envelope.

Preferably, a plurality of the ribs form a rib block outside the free rope end, and the rib block is provided with a hanging hole. The rib blocks and the hanging holes are helpful for connecting the envelope bag with the guide rope.

Preferably, the connecting buckle comprises a shackle and a penetrating ring, the shackle is clamped on the hanging hole, and the penetrating ring is connected with the fixing ring and the shackle. The penetrating ring is directly penetrated in the fixed ring, the operation is simple and convenient, and the strength between the connecting buckle and the fixed ring is ensured.

Preferably, the fixing ring is welded to an end face of the free rope end. Through the welding, both guaranteed the joint strength of solid fixed ring and free rope end, can prevent again that the steel wire of free rope end from scattering.

Preferably, the fixing ring is a nut. The nut is a hexagon nut, the size is selected according to the size of the steel wire rope, the processing is easy, and the welding and the fixing are convenient.

A method for stringing a steel wire rope of a riser tensioner is characterized by utilizing the steel wire rope of the riser tensioner, and comprises the following steps:

and S1, placing the rope barrel of the tensioner at the lowest position of the moon pool, and collecting the rope body in the rope barrel, wherein the end face of the free rope end is flush.

And S2, fixing the side surface of the fixing ring at the free rope end.

And S3, coating the envelope bag at the free rope end.

S4, connecting the connecting buckle with the envelope bag, and simultaneously connecting the connecting buckle with the fixing ring.

And S5, connecting a guide rope with the connecting buckle, and penetrating the guide rope into the rope groove of the tensioner.

And S6, bringing the tensioner steel wire rope into the rope groove of the tensioner from the lowest position of the moon pool through the guide rope.

Preferably, the fixing ring in S2 is a nut, and the side surface of the nut is welded and fixed at the free rope end.

Preferably, the step of S3 further comprises the step of wrapping a binding tape around the envelope bag for fixing the envelope bag on the rope body.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows: the steel wire rope of the riser tensioner and the rope threading method thereof increase the safety and reliability of rope threading and save a large amount of materials and time.

Drawings

Fig. 1 is a schematic structural view of a riser tensioner cable according to a preferred embodiment of the present invention.

Fig. 2 is a flow chart of a method for threading a riser tensioner rope according to a preferred embodiment of the invention.

Fig. 3 is a schematic structural view of a strung riser tensioner according to a preferred embodiment of the invention.

Description of reference numerals:

rope body 1

Free rope end 11

Fixing ring 2

Envelope bag 3

Ribs 31

Rib block 32

Hanging hole 33

Ribbon 34

Connecting buckle 4

Shackle 41

Threading ring 42

Rope barrel 5

Tensioner guide wheel 6

Drill floor structure 7

Tensioner active end 8

Tensioner fixed end 9

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

The riser tensioner cable of the present embodiment is shown in fig. 1, and comprises: the rope body 1, the fixed ring 2, the envelope bag 3 and the connecting buckle 4. The rope body 1 is provided with a free rope end 11; the fixing ring 2 is fixed on the end surface of the free rope end 11; the envelope bag 3 covers the free rope end 11; the connecting buckle 4 is connected with the envelope bag 3, and the connecting buckle 4 is connected with the fixing ring 2. By comprehensively using the envelope bag 3 and the fixing ring 2, the strength of the connection between the free rope end 11 and the guide rope is greatly improved, and simultaneously, a large amount of materials and a large amount of time are saved.

The riser tensioner cable further comprises at least one band 34, which band 34 surrounds the envelope bag 3 for securing the envelope bag 3 to the rope 1. The use of the bandage 34 can further increase the strength of the envelope bag 3 and prevent the envelope bag 3 from sliding relative to the rope 1. The end of the envelope bag 3 is provided with a plurality of ribs 31, the plurality of ribs 31 extending out of the free string end 11. The ribs 31 contribute to increase the tensile strength of the end of the envelope bag 3. The plurality of ribs 31 form a rib block 32 outside the free rope end 11, and the rib block 32 is provided with a hanging hole 33. The rib block 32 and the hanging hole 33 help to connect the envelope bag 3 with the leader. The connecting buckle 4 comprises a shackle 41 and a penetrating ring 42, the shackle 41 is clamped on the hanging hole 33, and the penetrating ring 42 connects the fixed ring 2 and the shackle 41. The threading ring 42 is directly threaded in the fixing ring 2, the operation is simple and convenient, and the strength between the connecting buckle 4 and the fixing ring 2 is ensured. The fixing ring 2 is welded to the end face of the free rope end 11. Through the welding, both guaranteed the joint strength of solid fixed ring 2 and free rope end 11, can prevent again that the steel wire of free rope end 11 from scattering. The fixing ring 2 is a nut. The nut is easy to process and convenient to fix.

The method for stringing a riser tensioner steel wire rope of the embodiment utilizes the riser tensioner steel wire rope as described above, and as shown in fig. 2, the method for stringing the riser tensioner steel wire rope comprises the following steps:

101. the rope bucket 5 of the tensioner is placed at the lowest position of the moonpool, and the rope body 1 is stored in the rope bucket 5 while the end face of the free rope end 11 is processed flush.

102. The side of the securing ring 2 is secured to the free rope end 11. Preferably, the fixing ring 2 is a nut, the side of which is welded and fixed to the free rope end 11.

103. The envelope bag 3 is covered on the free rope end 11, and the binding belt 34 is covered outside the envelope bag 3 and is used for fixing the envelope bag 3 on the rope body 1.

104. The connecting buckle 4 is connected with the envelope bag 3, and the connecting buckle 4 is connected with the fixing ring 2.

105. The leader is connected to the connector buckle 4 and threaded into the rope groove of the tensioner.

106. The tensioner wire rope is brought from the lowest position of the moonpool into the rope groove of the tensioner by the lead rope.

The tensioner rope has a rope diameter of 63.5mm, a length of about 94.4m and a weight of about 2.5 tons, wherein the rope end at one end has been made ready for connection to the equipment. The wire rope is threaded from the moonpool to the rig floor tensioner. As shown in fig. 3, the rope body 1 of the riser tensioner rope is stored in a rope bucket 5, and the rope bucket 5 is placed at the bottom of the moon pool. The rope groove diameter of the tensioner guide wheel 6 is 100 mm. And hoisting the steel wire rope of the tensioner on a support of the steel wire rope roller, hoisting the steel wire rope of the tensioner to a Christmas tree trolley of the moon pool, and fixing the steel wire rope of the tensioner and the support on the Christmas tree trolley. Care is taken to ensure as far as possible that the position of the outlet of the tensioner rope is aligned with the direction riser station tensioner idler 6. The envelope bag 3 used for threading is preferably a snake skin bag, 1 snake skin bag of 3 tons is prepared, and a steel wire rope of 100 meters long and 10mm in diameter is used as a leading rope. One electric winch of 10 tons, 2 guide wheels of 10 tons and 3 chain blocks of 5 tons are prepared.

In general, the end of the riser tensioner which is not tied is sheathed with a snakeskin bag corresponding to the load, and compaction is ensured. And (3) starting the electric winch, taking the steel wire rope of the tensioner into a rope groove of the tensioner guide wheel 6 from the moon pool through a guide rope with the diameter of 10mm and a shackle 41 on the snakeskin bag, passing through the drill floor structure 7 and bypassing the movable end 8 of the tensioner, and finally fixing one end of the steel wire rope at the fixed end 9 of the tensioner.

The riser tensioner steel wire rope and the rope threading method thereof of the embodiment increase the safety and reliability of rope threading, and save a large amount of materials and time.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A riser tensioner steel wire rope, characterized in that it comprises:

a rope body having a free rope end;

the fixing ring is fixed on the end face of the free rope end;

the envelope bag wraps the free rope end, the tail end of the envelope bag is provided with a plurality of ribs, the ribs extend out of the free rope end, a rib block is formed outside the free rope end by the plurality of ribs, and hanging holes are formed in the rib block;

the connecting buckle is connected with the enveloping bag and is connected with the fixing ring, the connecting buckle comprises an shackle and a penetrating ring, the shackle is clamped on the hanging hole, and the penetrating ring is connected with the fixing ring and the shackle;

the riser tensioner steel wire rope further comprises at least one binding belt, wherein the binding belt surrounds the envelope bag and is used for fixing the envelope bag on the rope body.

2. The riser tensioner rope of claim 1, wherein the retainer ring is welded to an end face of the free rope end.

3. The riser tensioner rope of claim 2, wherein the retaining ring is a nut.

4. A riser tensioner wireline reeving method using the riser tensioner wireline of claim 1, the method comprising the steps of:

s1, placing the rope barrel of the tensioner at the lowest position of the moon pool, and collecting the rope body in the rope barrel, wherein the end faces of the free rope ends are flush;

s2, fixing the side surface of the fixing ring at the free rope end;

s3, wrapping the envelope bag at the free rope end, and further comprising the step of wrapping a binding belt outside the envelope bag, wherein the binding belt is used for fixing the envelope bag on the rope body;

s4, connecting the connecting buckle with the envelope bag and simultaneously connecting the connecting buckle with the fixing ring;

s5, connecting a leading rope with the connecting buckle, and penetrating the leading rope into a rope groove of the tensioner;

s6, the steel wire rope of the tensioner is brought into the rope groove of the tensioner from the lowest position of the moon pool through a guide rope;

at S3, the method further comprises the step of wrapping a binding tape around the envelope bag for fixing the envelope bag on the rope body;

the fixing ring in S2 is a nut, and the side surface of the nut is welded and fixed to the free rope end.