KR101349072B1 - Flange cpopling appratus for drilling riser - Google Patents

Abstract

The present invention relates to a flange fastening device of a drilling riser for fastening the flanges of the pipes constituting the drilling riser in a connected state, and moving along the lengthwise direction of the first pipe while being separably fitted to the first pipe of the pipes. A catch ring possibly coupled; A rotating arm having one end hinged to the locking ring, the other end pivoting around a hinge axis, and provided in a circumferential direction of the locking ring; Fixing bolts detachably coupled to the other ends of the rotary arms to be integral with the rotary arm and penetrate the flanges according to the movement of the locking ring, or penetrate the flanges by pivotal rotation of the rotary arm; A fastening nut fastened to the fixing bolt and fixed while pressing the flanges; And a bolt fastener which prevents the fixing bolt from being detached from the flange while suppressing the opening of the fixing bolt or restricting the fastening nut to the fixing bolt. According to the present invention, the fixing bolts can be inserted into the flanges collectively as the pivot moves while the bolts are pivotally rotated while being coupled to the locking ring through the rotary arm, so that the fastening time can be shortened. As the fastening nut is constrained by the bolt fastener, the fastening force of the fastening bolt or the fastening nut can be maintained even when repeated impacts such as currents are applied.

Description

FLANGE CPOPLING APPRATUS FOR DRILLING RISER}

The present invention relates to a riser for connecting between the deep sea drilling line and the seabed in the drilling operation to check whether the oil or gas buried in the seabed, more specifically the main pipe and choke and kill line, booster line, hydraulic line, etc. When connecting or fixing the riser composed of the auxiliary line of the, the flange of the drilling riser for firmly fixing the flanges constituting the drilling riser connected.

In general, the riser is a connection between a deep sea drilling line and a seabed in the sea trial work, and is connected to a length of about 1,500 meters or more by continuously connecting a plurality of pipes.

Such risers typically comprise an auxiliary line, such as a main pipe, choke and kill lines, booster lines, hydraulic lines, etc., which are provided at both ends of the pipes. The pipes are connected to the bottom by tightening the flanges.

Existing risers accurately connect the bolt holes (not shown) formed in the flange 2 of the pipes 1 as shown in FIG. 1, and then fix the fixing bolts 3 by inserting the bolts one by one. The fastening method with the nut 4 was used.

By the way, this conventional connection method takes a lot of time and energy to position the flange (2), as well as fixing bolts (3) one by one there is a problem that the efficiency of the connection work is lowered.

As a conventional technology for solving this problem, Korean Patent Laid-Open Publication No. 10-2010-0016380 "Riser device and riser section" includes a method of joining the riser using a heat shrink material, a method of joining the riser having a screw thread at the end, magnetic force Coupling method of the riser, the coupling method of the riser by the split flange, etc. are proposed.

However, among the coupling methods of the risers proposed in the prior art, the coupling method using a heat-shrinkable material or magnetic force has a problem in that the manufacturing cost is excessively increased. There is a problem that the tightening force of the screw thread is loosened, and the coupling method by the split flange has a hassle to fasten the fixing bolts one by one like the conventional method.

Republic of Korea Patent Publication No. 10-2010-0016380 (2010.02.12)

The present invention has been created to improve the problems of the prior art as described above, the fixing bolts for fixing the flanges may be inserted into the flange or caught through the flange through pivot rotation while moving along the pipe collectively, In particular, the object is to provide a flange fastening device of the riser that can be prevented from loosening the fixing bolts.

Another object of the present invention is to provide a flange fastening device for a riser that can be fastened to fastening bolts, respectively, which can be centered at each fixing bolt while collectively moving along a pipe.

Further, an object of the present invention is to provide a flange fastening device for a riser that can prevent the fastening nut from being released by restraining the fastening nut to the fixing bolt.

Flange fastening device of the drilling riser according to the present invention for achieving the above object, as a flange fastening device of the drilling riser for fastening the flanges of the pipes constituting the drilling riser in a connected state, to the first pipe of the pipes A catch ring detachably fitted and movably coupled along the longitudinal direction of the first pipe; A rotating arm having one end hinged to the locking ring, the other end pivoting around a hinge axis, and provided in a circumferential direction of the locking ring; Fixing bolts detachably coupled to the other ends of the rotary arms to be integral with the rotary arm and penetrate the flanges according to the movement of the locking ring, or penetrate the flanges by pivotal rotation of the rotary arm; A fastening nut fastened to the fixing bolt and fixed while pressing the flanges; And a bolt fastener that prevents the fixing bolt from being detached from the flange while suppressing the opening of the fixing bolt or restricting the fastening nut to the fixing bolt.

For example, the bolt fastener is separably fitted to the second pipe of the pipes and is movably coupled in the longitudinal direction of the second pipe, and through holes are formed to penetrate the fixing bolts, respectively. And a second locking ring pressed by the fastening nut in a state in which the fastening nut is fastened to the fixing bolt in close contact with the flange.

In addition, the bolt fastener, the nut holder is provided on the second locking ring for fixing the fastening nut in a rotatable state around the through hole of the second locking ring; preferably further comprises a.

For example, the nut holder may include an angle protruding jaw configured to protrude from the second locking ring in a state concentric with the through hole and to rotatably fix the fastening nut while being caught in a state where a part of the fastening nut is inserted; It is preferable to include.

For example, the fastening nut is preferably a flange nut having a protruding frame that is fitted to the protruding jaw.

In addition, the bolt fastener is coated on the screw thread of the fixing bolt or the screw thread of the fastening nut, the coating material is compressed by being sandwiched between the fixing bolt and the fastening nut while being deformed by tightening the fastening nut; It is preferable to include.

For example, the coating material is preferably composed of at least one of plastic resin, nylon resin, silicone resin or synthetic rubber.

And, the bolt fastener is provided in a state capable of rotating the fastening nut, the tongue washer to prevent the reverse rotation of the fastening nut while pressing the screw thread of the fixing bolt by the rotation of the fastening nut; It is preferable.

On the contrary, the bolt fastener is detachably fitted to the second pipe of the pipes and is movably coupled along the longitudinal direction of the second pipe, and the fixing bolts are formed with through holes through which the fixing bolts respectively penetrate. A second locking ring which is fitted and caught by the fastening nut in a state in which the fastening nut is fastened to the fixing bolt in close contact with the flange; A nut holder provided in the second locking ring to fix the fastening nut in a rotatable state about the through hole of the second locking ring; A coating material coated on a screw thread of the fixing bolt or a screw thread of the fastening nut and being deformed by tightening the fastening nut and being compressed in the state interposed between the fastening nut and the fastening nut; And a tongue washer provided to be rotatable in the fastening nut and preventing a reverse rotation of the fastening nut while pressing the screw thread of the fixing bolt by the fastening nut.

For example, the rotating arm may include: a first link having a bar shape hinged to the locking ring by the hinge axis to pivot about the hinge axis; And a second link having one end hinged to the first link with respect to the second hinge axis, the other end pivoting around the second hinge axis, and the fixing bolt detachably coupled to the other end. It is preferable.

For example, the fixing bolt, the screw thread is formed at both ends and the stud bolt is screwed with the fastening nut in the state of being screwed to the other end of the rotary arm;

For example, the second locking ring is formed in the shape of a divided ring, the one ends of which are divided and hinged by hinge pins, so that the other ends are opened or contracted around the hinge pins, and the other ends are connected by the binding member. It is preferable to be movably coupled to the second pipe while being bound.

According to the flange fastening device of the drilling riser according to the present invention, as the fixing bolts are pivotally rotated while being collectively moved in a state coupled to the engaging ring through the rotary arm, the fastening time can be inserted into the flange collectively. In particular, as the fixing bolt or the fastening nut is restrained by the bolt fastener, the fastening force of the fixing bolt or the fastening nut can be maintained even when repeated impacts such as currents are applied.

Specifically, since the second locking ring constituting the bolt fastener is prevented from pivoting the fixing bolt as the locking bolt is fitted to the fixing bolts, the fixing bolt may be prevented from being separated from the flange when the bolt hole of the flange is open.

In addition, the nut holder is provided on the second locking ring so that the fastening nut is rotatably fixed so that the fastening nuts may be collectively centered on the fixing bolts while moving together with the second locking ring.

Specifically, since a part of the fastening nut is inserted into the protruding jaw constituting the nut holder, the fastening nut may rotate in a state in which the fastening nut is detachably coupled to the second locking ring.

As the coating material constituting the bolt fastener is compressed in the state interposed between the fixing bolt and the fastening nut, the fastening nut is constrained to be caught in the fastening bolt, thereby preventing loosening of the fastening nut.

Furthermore, since the tongue washer rotatably provided in the fastening nut prevents reverse rotation of the fastening nut by pressing the screw thread of the fixing bolt by the rotation of the fastening nut, the fastening force of the fastening nut can be maintained.

In addition, since the rotating arm is composed of the first link and the second link, the fixing bolt can be fitted to the flange while pivoting in multiple stages according to the shape of the flange.

1 is a perspective view showing a connection state of a general riser.
Figure 2 is a perspective view showing a flange fastening device of the riser according to the present invention.
3 is a bottom perspective view showing the bolt fastener shown in FIG.
Figure 4 is a front view showing a flange fastening device of the riser according to the present invention.
5 is a front view showing a fastening state of the fastening device shown in FIG.
Figure 6 is a longitudinal cross-sectional view showing a coating material constituting the bolt fastener of the present invention.
Fig. 7 is a longitudinal sectional view showing a tongue washer constituting the bolt fastener of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. In the following description of the present invention, detailed descriptions of well-known general functions or configurations will be omitted.

Flange fastening device 10 of the drilling riser according to an embodiment of the present invention to fasten the flanges (2) of the pipes (1a) (1b) constituting the riser as shown in Figures 2 and 4 To be, it comprises a locking ring 100, the rotary arm 200, the fixing bolt 300, the fastening nut 400 and the bolt fastener (500).

The locking ring 100 is a member for moving the fixing bolts 300 along the pipe 1a collectively, and is formed in a divided ring shape as shown in FIG. 2 to open around the hinge pin 110. The first pipe 1a is fitted into the first pipe 1a, and is coupled through a binding member 120 such as a fixing pin to be movable along the longitudinal direction of the first pipe 1a.

Here, the binding member 120 may be any configuration known in the art to which the present invention belongs, such as a fixing pin or bolt.

The rotary arm 200 is a component that rotatably connects the fixing bolt 300 to the locking ring 100, for example, the first link 210 and the second link 220 as shown in FIGS. 2 and 4. It may be configured to include).

The first link 210 is formed in a bar shape and is provided in plurality along the circumferential direction of the locking ring 100. One end is hinged to the locking ring 100 by a hinge shaft 200a, and the other end is hinged. It pivots about 200a.

The second link 220 is a member to which the fixing bolt 300 is detachably coupled, one end of which is hinged to the first link 210 by the second hinge shaft 200b, as shown in FIG. 4. As the fixing bolt 300 is coupled to the other end, the fixing bolt 300 pivots about the second hinge shaft 200b.

That is, the fixing bolt 300 pivots about the second hinge axis 200b together with the second link 220 and pivots about the hinge axis 200a together with the first link 210. It pivots in multiple stages according to the shape of the bolt hole 5 formed in (2).

For example, the second link 220 may be formed in the form of a head of a bolt as shown in FIG. 2, and the fixing bolt 300 may be screwed as shown in FIG. 4.

On the other hand, the rotating arm 200 is the second link 220 is omitted, the fixing bolt 300 can be detachably coupled to the first link 210, the other third link (not shown) May be added.

For example, the fixing bolt 300 may be configured as a stud bolt having threads formed at both ends thereof, as shown in FIG. 4, and may be screwed to the fastening nut 400 while being screwed to the second link 220.

Unlike this, the fixing bolt 300 may be formed in the same manner as the second link 220 and detachably coupled to the first link 210.

The fixing bolt 300 moves along the longitudinal direction of the first pipe 1a together with the locking ring 100 when the bolt hole 5 of the flange 2 is formed as a closed type (not shown) in a hole shape. While being inserted through the bolt hole (5) in a batch.

On the other hand, the fixing bolt 300 is pivoting about the hinge shaft (200a) (200b) as shown in Figure 4, when the bolt hole 5 is formed in an open type with one side open as shown in FIG. While being inserted into the bolt hole 5 from the side of the flange (2).

The fastening nut 400 is fastened to the fixing bolt 300 fitted in the bolt hole 5 of the flange 2 to press and fix the flanges 2.

The bolt fastener 500 prevents the fixing bolts 300 from being opened by pivot rotation when the bolt hole 5 of the flange 2 is formed in an open type, and constrains the fastening nut 400 to the fixing bolt 300. Fastening nut 400 is a component that prevents the fixing bolt 500 is released.

The bolt fastener 500 may be configured as a second locking ring 510, for example, as shown in FIG.

As shown in the drawing, the second locking ring 510 is movably fitted to the second pipe 1b, and through holes 511 are provided so that the fixing bolts 300 inserted into the flange 2 are caught in the through state. Pressed by the fastening nut 400 in close contact with (2).

That is, the fixing bolts 300 are inserted into the through holes 511 of the second locking ring 510 and the pivot rotation is constrained according to the locking so that they do not leave the flange 2.

The second locking ring 510 is formed in a divided ring shape as shown in FIG. 3 and is fitted to the second pipe 1b while being opened or contracted about the hinge pin 515, and is coupled with a connection bolt. Binding by the member 516 is movably coupled along the longitudinal direction of the second pipe 1b.

Meanwhile, the bolt fastener 500 may further include a nut holder 520 as shown in FIG. 3.

The nut holder 520 rotatably fastens the fastening nuts 400 around the through hole 511 of the second locking ring 510 to collectively center the fastening nuts 400 on the fastening bolts 300. It is a component for.

The nut holder 520 may be configured as, for example, a protruding jaw 521 as shown in FIG. 3.

As shown in FIGS. 3 and 4, the protruding jaw 521 protrudes in an ankle shape to the second locking ring 510 while being concentric with the through hole 511, and a part of the fastening nut 400 is inserted. Fix the fastening nut 400 in a rotatable state according to the locked state.

Here, the fastening nut 410 may be composed of a flange nut provided with a protruding frame 410, as shown in Figure 3, it is inserted into the protruding jaw 521 through the protruding frame 410 is rotated in a locked state .

That is, the fastening nut 410 moves together with the second locking ring 510 while being coupled to the nut holder 520 as shown in FIG. 4, and as shown in FIG. 5, in the through hole 511. While fastening to the fixing bolt 300 is fitted to fix the flange (2) in close contact.

Meanwhile, the bolt fastener 500 may include the coating material 530 as shown in FIG. 6.

The coating material 530 is coated on the thread of the fixing bolt 300 or coated on the thread of the fastening nut 400 as shown in Figure 6 is interposed between the fixing bolt 300 and the fastening nut 400, fastening Deformed by tightening the nut 400 is compressed to constrain the fastening nut 400 to the fixing nut (300).

That is, the coating material 530 is pressed in the state sandwiched between the fixing bolt 300 and the fastening nut 400 to prevent the fastening nut 400 to reverse rotation arbitrarily. Therefore, the fastening nut 400 can be maintained a fastening force.

The coating material 530 is preferably composed of at least one of, for example, plastic resin, nylon resin, or synthetic rubber.

On the other hand, the bolt fastener 500 may further comprise a tongue washer 540 as shown in FIG.

Tongue washer 540 is rotatably coupled to the end of the fastening nut 400 as shown in Figure 7 has a protruding piece 541 protruding toward the center, the fastening nut 400 is fixed bolt 300 As the protrusions 541 are elastically deformed, the threads of the fixing bolts 300 are pressed.

That is, the fastening nut 400 is constrained to the fixing nut 300 as the tongue washer 540 presses the thread of the fixing nut 300 to prevent reverse rotation and maintain the fastening force.

Here, the bolt fastener 500 may be composed of a coating material 530 or a tongue washer 540 in a state in which the above-described configuration of the second locking ring 510 is omitted. Together with 510 may be composed of a coating material 530 or may be composed of a tongue washer (540).

In addition, the bolt fastener 500 may include both the second locking ring 510, the nut holder 520, the coating material 530, and the tongue washer 540.

The fastening process of the flange 2 by the fastening device 10 of the present invention including the above components will be described.

The worker inserts the locking ring 100 into the first pipe 1a in a state in which the fixing bolts 300 are coupled to the respective rotary arms 200. At this time, the locking ring 100 is fitted to the first pipe (1a) in the open state around the hinge pin 110, and is coupled while being bound by the binding member 120.

Subsequently, the worker couples the second locking ring 510 to the second pipe 1b while coupling the fastening nuts 400 to the respective nut holders 520. At this time, the second locking ring 510 is fitted to the second pipe 1b in a state of being opened about the hinge pin 515 in the same manner as the locking ring 100, and then coupled while being bound by the binding member 516. .

When the bolt hole 5 of the flange 2 is open, the worker moves the fixing bolt 300 together with the locking ring 100 and vertically inserts it into the bolt hole 5 or with the rotary arm 200. The fixing bolt 300 is inserted into the bolt hole 5 from the side of the flange 2 while pivoting about the hinge shaft 200a.

Then, the worker inserts the end of the fixing bolts 300 in the through hole 511 while moving the second locking ring 510, respectively. At this time, the fastening nut 400 is centered at the end of the fixing bolt 300 while moving together with the second locking ring 510.

Subsequently, the worker fastens the fastening nuts 400 to the fixing bolts 300 to fix the flanges 2 in close contact.

At this time, the fastening nut 400 is constrained to the fixing bolt 300 as the coating material 530 is compressed and deformed by tightening between the threads of the fixing bolt 300, the protruding piece of the tongue washer 540. As the 541 is elastically deformed and pressurizes the threads of the fixing bolt 300, it is restrained by the fixing bolt 300 to prevent reverse rotation.

Therefore, the fastening nut 400 is not released from the fixing bolt 300 even when the fastening force is maintained and the external force such as current flow is repeated, and the fixing bolt 300 is constrained by the second locking ring 510 to pivot the rotation. Since it is prevented, the flow is suppressed to maintain the fastening force with the fastening nut 400.

According to the flange fastening device 10 of the drilling riser according to the present invention as described above, the fixing bolts 300 are pivotally rotated while collectively moving in the state coupled to the engaging ring 100 through the rotary arm 200 Accordingly, the fastening time can be shortened because the fixing bolts 300 can be inserted into the flange 2 collectively. In particular, the fixing bolt 300 or the fastening nut 400 is constrained by the bolt fasteners 500. Even when repeated shocks are applied, the fastening force of the fixing bolt 300 or the fastening nut 400 can be maintained.

Specifically, since the second locking ring 510 constituting the bolt fastener 500 is prevented from pivoting of the fixing bolt 300 as the second locking ring 510 is fitted to the fixing bolts 300, the bolt hole 5 of the flange 2 is prevented. If the) is open type fixing bolt 300 can be prevented from leaving the flange (2).

In addition, the nut holder 520 is provided on the second locking ring 510 so that the fastening nut 400 is rotatably fixed so that the fastening nuts 400 move together with the second locking ring 510 to fix the bolt 300. Can be centered at the same time.

Specifically, since a part of the fastening nut 400 is inserted into the protruding jaw 521 constituting the nut holder 520, the fastening nut 400 is detachably coupled to the second locking ring 510. You can rotate in the state.

Then, as the coating material 530 constituting the bolt fastener 500 is compressed in a state interposed between the fixing bolt 300 and the fastening nut 400, the fastening nut 400 is caught in the fastening bolt 300. Since the fixing bolt 300 or the fastening nut 400 can be prevented from loosening.

Furthermore, as the tongue washer 540 rotatably provided in the fastening nut 400 presses the thread of the fixing bolt 300 by the rotation of the fastening nut 400, the reverse rotation of the fastening nut 400 is prevented. Therefore, the fastening force of the fastening nut 400 can be maintained.

In addition, since the rotary arm 200 is composed of the first link 210 and the second link 220, the fixing bolt 300 is fitted to the flange 2 while pivoting in multiple stages according to the shape of the flange (2). Can be.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various changes, substitutions, and alterations can be made therein without departing from the spirit of the invention.

1a, 1b: pipe 2: flange
5: bolt hole 10: flange fastening device
100: engaging ring 110: hinge pin
120: binding member 200: rotary arm
200a, 200b: hinge shaft 210: first link
220: second link 300: fixing bolt
400: tightening nut 410: protrusion frame
500: bolt fastener 510: second locking ring
511: through hole 515: hinge pin
516: binding member 520: nut holder
521: protruding jaw 530: coating material
540: tongue washer 541: protrusion

Claims (12)

A flange fastening device of a drilling riser for fastening the flanges of pipes constituting the drilling riser in a connected state,
A locking ring movably coupled along the longitudinal direction of the first pipe while being separably fitted to the first pipe of the pipes;
A rotating arm having one end hinged to the locking ring, the other end pivoting around a hinge axis, and provided in a circumferential direction of the locking ring;
Fixing bolts detachably coupled to the other ends of the rotary arms to be integral with the rotary arm and penetrate the flanges according to the movement of the locking ring, or penetrate the flanges by pivotal rotation of the rotary arm;
A fastening nut fastened to the fixing bolt and fixed while pressing the flanges; And
And a bolt fastener that prevents the fixing bolt from being detached from the flange while suppressing the opening of the fixing bolt or restricting the fastening nut to the fixing bolt.
The rotary arm,
A bar-shaped first link hinged to the locking ring by the hinge shaft to pivot about the hinge shaft; And
And a second link having one end hinged to the first link with respect to the second hinge axis, the other end pivoting around the second hinge axis, and the fixing bolt detachably coupled to the other end. Flange fastening device for drilling risers.
The method according to claim 1,
The bolt fastener,
Removably fitted in the second pipe of the pipes are separably coupled to move along the longitudinal direction of the second pipe, through-holes through which the fixing bolts are formed are formed so that the fixing bolts are fitted and the fastening nut is fixed. And a second locking ring pressurized by the fastening nut while being in close contact with the flange as fastened to the bolt.
The method according to claim 2,
The bolt fastener,
And a nut holder provided on the second locking ring to fix the coupling nut in a rotatable state about the through hole of the second locking ring.
The method according to claim 3,
The nut holder,
And an angled protruding jaw that protrudes from the second locking ring in a state concentric with the through hole and is rotatably fixed to the fastening nut while being caught in a state in which a part of the fastening nut is inserted. Flange fastening of the drilling riser.
The method of claim 4,
The fastening nut,
Flange fastening device for a drilling riser, characterized in that consisting of; flange nut having a protruding frame is fitted to the projection jaw.
The method according to claim 1 or 2,
The bolt fastener,
A coating material coated on a screw thread of the fixing bolt or a screw thread of the fastening nut, and deformed by tightening the fastening nut and being compressed in an interposed state between the fixing bolt and the fastening nut. Flange fasteners on risers.
The method of claim 6,
The coating material,
Flange fastening device for a drilling riser, characterized in that consisting of at least one of plastic resin, nylon resin, silicone resin or synthetic rubber.
The method according to claim 1 or 2,
The bolt fastener,
And a tongue washer provided to be rotatable to the fastening nut and preventing a reverse rotation of the fastening nut while pressing the screw thread of the fixing bolt by the fastening nut of the drilling riser. Flange fasteners.
The method according to claim 1,
The bolt fastener,
Removably fitted in the second pipe of the pipes are separably coupled to move along the longitudinal direction of the second pipe, through-holes through which the fixing bolts are formed are formed so that the fixing bolts are fitted and the fastening nut is fixed. A second locking ring pressurized by the fastening nut in close contact with the flange as fastened to the bolt;
A nut holder provided in the second locking ring to fix the fastening nut in a rotatable state about the through hole of the second locking ring;
A coating material coated on a screw thread of the fixing bolt or a screw thread of the fastening nut and being deformed by tightening the fastening nut and being compressed in the state interposed between the fastening nut and the fastening nut; And
And a tongue washer provided to be rotatable to the fastening nut and preventing a reverse rotation of the fastening nut while pressing the screw thread of the fixing bolt by the fastening nut of the drilling riser. Flange fasteners.
delete The method according to claim 1,
The fixing bolt
A screw thread is formed at both ends and a stud bolt screwed to the fastening nut in a state of being screwed to the other end of the rotary arm; Flange fastening device of the drilling riser characterized in that consisting of.
The method according to claim 2,
The second locking ring,
One end portion divided into a ring shape is hinged by a hinge pin so that the other end is opened or contracted around the hinge pin, and the other ends are bound by the binding member and are movable to the second pipe. Flange fastening device of the drilling riser characterized in that coupled to.

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