KR20150053109A - Separation device for floating Offshore Structure - Google Patents

Abstract

A separation apparatus for a floating marine structure is disclosed. The separation apparatus for a floating marine structure according to the present invention comprises: a separator mounted onto a floating marine structure, and separating a well fluid into gas, oil, and water components in terms of specific gravity; a weir member provided inside the separator, and impounding the water component located in a lower part of the oil component inside the separator; and an overflow blocking module connected to the weir member, and preventing the water component from overflowing over the weir member during the movement of the floating marine structure.

Description

{Separation device for floating offshore structure}

The present invention relates to a separation apparatus for a floating ocean structure, and more particularly, to a separation apparatus for a floating type ocean structure capable of enhancing the separation efficiency of a well-being jetted mixture even when the floating ocean structure is shaken by waves or waves will be.

With the rapid development of industries and industries internationally, the use of earth resources such as petroleum is gradually increasing, and thus the stable production and supply of crude oil is emerging as an important issue on a global scale.

For this reason, recently marginal field or deep-sea oil development has been economically feasible, which has been neglected due to economic difficulties so far. Therefore, with the development of submarine mining technology, drilling facilities suitable for the development of such oilfields A floating type of offshore structure has been developed.

In other words, conventional seabed drilling is mainly used for a rig ship or a fixed platform dedicated to deep sea drilling, which can be sailed only by another tugboat, Recently, a so-called floating production storage offloading facility (FPSO, Floating Production Storage Off loading Vessels) has been developed, which is equipped with cutting-edge drilling equipment and built in the same form as a general ship, It is used for deep sea drilling.

Floating Crude Oil Production Storage and Handling Facility (FPSO) classifies and refines well fluids extracted from offshore plants and drillships to produce crude oil and store it to shuttle tankers Tanker or other special ship capable of being unloaded at the transfer site.

This floating crude oil production storage and unloading facility (FPSO) is composed of a lower hull structure (Hull) that functions as a storage facility and a topsides that produces and processes crude oil. Depending on storage capacity, Small size, between 100 and 1.5 million barrels, between 150 and 200 million barrels, and over 2 million barrels.

On the other hand, the floating oil production storage and unloading facility is equipped with a separating device for separating the drilled wells. Such a separation apparatus separates the oil-gas mixture into an oil component and a water component by using the specific gravity difference.

That is, the oil-in-water mixture supplied to the separation device is separated into oil component and water component in the interior of the separation device over time, and the separated oil components are separated by the difference in specific gravity with respect to the water component .

Further, the oil component is extracted by a weir provided inside the separating device. This weir has a plate shape and serves to trap water components located below the oil component.

By this weir, the oil component located on the upper side of the water component flows into the oil region beyond the weir, so that the oil component and the water component are finally separated.

However, the separation device according to the prior art can be repeatedly oscillated without being horizontal in the float-type crude oil production storage-unloading facility due to waves or waves, and the floatation of the float- A sloshing phenomenon occurs. This sloshing phenomenon is one of the main causes of lowering the efficiency of separation of oil components in floating oil production storage and unloading facilities.

That is, due to the sloshing phenomenon, the water component overflows to the oil region beyond the weir and the water component again mixes with the oil component, so that the separation efficiency of the oil component is lower than that of the separator provided on the land.

Therefore, it is necessary to develop a floating type separation device for an offshore structure that can increase the separation efficiency of oil components even if the floating structure is shaken by waves or waves.

Korean Patent Laid-Open Publication No. 10-2012-0008844 (Samsung Heavy Industries Co., Ltd.), 2012.01.01.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a floating separation device for an offshore structure capable of enhancing separation efficiency of an oil component even if the floating structure is shaken by wave or wave.

According to one aspect of the present invention there is provided a method of separating a well fluid into a gas, oil, and water component using a difference in specific gravity, the separator being mounted on a floating offshore structure, ); A weir member provided inside the separator and containing the water component located below the oil component in the separator; And an overflow blocking module connected to the partitioning member and blocking an overflow of the water component over the partitioning member during movement of the floating floating structure, .

The overflow blocking module may include a horizontal baffle portion coupled to an upper end of the partitioning member and disposed in a direction crossing the partitioning member.

The horizontal baffle portion may be a lengthwise variable baffle portion having a length that can be expanded and contracted.

The length-variable horizontal baffle portion may include: a first baffle plate coupled to an upper end of the partition member; A second baffle plate that is movably connected to the first baffle plate; And a second baffle plate driving unit connected to the second baffle plate and moving the second baffle plate.

The first baffle plate may include: a first body portion having a plurality of through holes; And a guide portion connected to the first body portion and supporting the second baffle plate and guiding movement of the second baffle plate.

The guide portion may include a first guide rail to which the second baffle plate is connected; And a first support roller rotatably coupled to the first guide rail and supporting the second baffle plate.

The second baffle plate may include: a second body portion having a plurality of through holes; A second guide rail connected to the second main body and supported by the first support roller; And a second support roller rotatably coupled to the second guide rail and supported by the first guide rail.

The second baffle plate driving unit includes an underwater motor; A pinion gear connected to the underwater motor and rotated by the underwater motor; And a rack gear provided on the second baffle plate and engaged with the pinion gear.

An inclination angle sensor for sensing an inclination angle of the floating ocean structure during movement; And a controller receiving the sensing signal of the tilt angle sensor and transmitting a control signal to the second baffle plate driver.

And a plurality of vertical baffle portions provided in the separator and arranged in a direction parallel to the weir member.

Embodiments of the present invention may be used to prevent overflow of a water component by the overflow blocking module connected to a partitioning member that holds a water component during exercise such as pitching or rolling motion of a floating offshore structure, It is possible to increase the separation efficiency of the oil component even if the floating ocean structure is shaken by waves or waves.

1 is a view showing a separation apparatus for a floating ocean structure according to a first embodiment of the present invention.
FIG. 2 is a diagram in which sloshing is generated in FIG. 1; FIG.
3 is an exploded perspective view showing a lengthwise variable horizontal baffle portion of a separation apparatus for a floating ocean structure according to a second embodiment of the present invention.
Figure 4 is a side view of the first baffle plate and the second baffle plate of Figure 3;
Figs. 5 and 6 are operational state diagrams of the length-variable horizontal baffle portion of Fig. 3. Fig.
FIGS. 7 and 8 are views showing sloshing generated in a separation apparatus for a floating ocean structure equipped with the lengthwise variable horizontal baffle of FIG. 3. FIG.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in order to avoid unnecessary obscuration of the present invention.

FIG. 1 is a view showing a separation apparatus for a floating ocean structure according to a first embodiment of the present invention, and FIG. 2 is a diagram showing sloshing in FIG.

The floating ocean structure to be described below refers to an offshore structure floating in buoyancy on the water surface, and includes a ship that can self-propel itself.

As shown in FIGS. 1 and 2, the separating device for a floating type ocean structure according to the first embodiment of the present invention is installed in a floating marine structure (not shown), and a well fluid is divided into a specific gravity difference A separator 110 for separating the oil component into gas, oil and water components using the oil separator 110 and the oil separator 110 provided inside the separator 110, A weir member 120 for holding water components to be disposed and a partition member 120 connected to the partition member 120 when movement such as pitching or rolling motion of the floating oceango- And an overflow blocking module 130 that prevents overflow of the water component exceeding the water level.

The separator 110 has a hollow cylindrical shape as shown in Fig. 1 or Fig.

The separator 110 includes an inlet Y for introducing a well fluid into the interior of the separator 110 and an oil spouting mixture Y, which is connected to the inlet Y and flows in from the inlet Y, And a momentum absorber 140 for reducing the kinetic energy of the rotor.

The momentum absorber 140 prevents the well jetted mixture from swinging inside the separator 110 by preventing the oil jetted mixture from flowing into the interior of the separator 110 at high pressure.

The oil jet mixture introduced into the separator 110 is separated into gas, oil and water components due to the difference in specific gravity over time. As shown in FIG. 1, a gas component is located at the uppermost position due to a relative difference in mass, an oil component is located below the gas component, and a water component Located.

The separator 110 further includes a mist extractor 150 for removing water from the gas component and a gas outlet 160 for discharging the gas component extracted from the water to the outside of the separator 110.

Thus, the gas component passes through the water extractor 150 and is filtered out through the outlet after the water component is filtered. The separated gas components can be injected into the well (not shown) through various processes, used as fuel or burned in the Flare Tower (not shown).

1 is referred to as a " separation zone " and the right side of the partition member 120 is referred to as an " oil zone ". The partition member 120 is divided into a plurality of compartments "

The oil component, which has the largest density, is located at the lowermost part of the separation zone. The oil component continues to accumulate above the water component, and then the partition member 120 at a predetermined height (a height larger than the upper end of the partition member 120) Overflows into the oil space.

In order to extract the separated water component and oil component, the separator 110 includes a water outflow portion 170 provided in the separation region and an oil outflow portion 180 provided in the oil region.

The separated water components are then re-injected into the wells or discharged to the sea after various processes. The reason why the above-described gas component or water component is injected into the oil well is that the gas component and the water component are injected into the oil well to prevent the internal pressure of the oil well gradually decreases due to the outflow of the oil well mixture, To increase the internal pressure of the oil well to increase the production.

On the other hand, the overflow blocking module 130 is connected to the partitioning member 120, and when the motion such as pitching or rolling motion of the floating offshore structure occurs, the overflow of the water component beyond the partitioning member 120 overflow.

The overflow blocking module 130 includes a horizontal baffle portion 131 coupled to the upper end of the partitioning member 120 and disposed in a direction crossing the partitioning member 120. The side portion of the horizontal baffle portion 131 may be coupled to the inner wall of the separator 110.

The horizontal baffle portion 131 is provided in a plate shape in which a plurality of through holes (not shown) are spaced apart from each other. In this embodiment, the horizontal baffle portion 131 is manufactured so that the ratio of the area of the entire through hole (not shown) to the entire area of the horizontal baffle portion 131 is approximately 21%.

In this ratio (approximately 21%), the overflow of the water component is effectively blocked by the horizontal baffle portion 131, and the oil component can smoothly pass through the horizontal baffle portion 131.

The separating device for a floating marine structure according to the present embodiment further includes a plurality of vertical baffle portions 190 provided in the separator 110 and disposed in a direction parallel to the partitioning member 120.

The vertical baffle portion 190 is provided in a plate shape in which a plurality of through holes H are spaced apart from each other, thereby relieving sloshing due to rocking for a floating ocean structure.

Hereinafter, the operation of the separation apparatus for a floating ocean structure according to the present embodiment will be described.

The oil spurting mixture introduced into the separator 110 is separated into gas, oil and water components over time.

The oil component, which has the largest density, is located at the lowermost part of the separation zone. The oil component continues to accumulate above the water component, and then the partition member 120 at a predetermined height (a height larger than the upper end of the partition member 120) Overflows into the oil space.

At this time, when a motion such as pitching or rolling of the floating ocean structure is generated by wave or wave or the like, sloshing phenomenon occurring in the separator 110 causes the water component of the separation space to flow into the partition member 120 ) Overflows. ≪ / RTI >

This overflow is blocked by the horizontal baffle portion 131 arranged in the direction intersecting the partitioning member 120, as shown in Fig. That is, the overflow kinetic energy is dissipated by collision with the horizontal baffle portion 131, so that the water component of the separation area can not pass over the partition member 120.

As described above, according to the present embodiment, the separating device for a floating ocean structure is provided with an overflow obstacle (not shown) connected to the partitioning member 120 that holds a water component when a motion such as pitching or rolling motion of a floating ocean structure is generated, Since the module 130 prevents the overflow of the water component, the separation efficiency of the oil component can be enhanced even if the floating ocean structure is shaken by waves or waves.

FIG. 3 is an exploded perspective view showing a lengthwise variable horizontal baffle portion of a separation apparatus for a floating ocean structure according to a second embodiment of the present invention, FIG. 4 is a side view of the first baffle plate and the second baffle plate of FIG. FIGS. 5 and 6 are operational state diagrams of the lengthwise variable horizontal baffle portion of FIG. 3, and FIGS. 7 and 8 show sloshing generated in a separating device for a floating ocean structure equipped with the variable- to be.

The present embodiment differs from the first embodiment only in the length-variable lateral baffle portion 132, and in other respects, is the same as that of the first embodiment in Figs. 1 and 2. Therefore, The length-variable horizontal baffle portion 132 will be mainly described.

In this embodiment, the length-variable horizontal baffle portion 132 is made to be stretchable in length so that its length is variable according to the degree of swinging of the floating ocean structure.

The lengthwise variable horizontal baffle portion 132 includes a first baffle plate 133 coupled to an upper end portion of the partition member 120 and a second baffle plate 134 And a second baffle plate driving unit 135 connected to the second baffle plate 134 and moving the second baffle plate 134.

The first baffle plate 133 is coupled to the upper end of the partitioning member 120. The first baffle plate 133 includes a first body portion 133a having a plurality of through holes H and a second body portion 133b connected to the first body portion 133a and supporting the second baffle plate 134, And a guide portion 133b for guiding the movement of the baffle plate 134.

The guide portion 133b includes a first guide rail 133c to which the second baffle plate 134 is connected and a second guide rail 133c that is rotatably coupled to the first guide rail 133c and supports the second baffle plate 134 1 support roller 133d.

In this embodiment, the first guide rails 133c are provided as a pair and are spaced apart from each other and coupled to the lower wall of the second baffle plate 134.

The first support roller 133d is rotatably coupled to each of the first guide rails 133c and is connected to the second baffle plate 134 to support the second baffle plate 134. [

The second baffle plate 134 is movably connected to the first baffle plate 133. The second baffle plate 134 includes a second body portion 134a having a plurality of through holes H and a second body portion 134b connected to the second body portion 134a and supported by the first support roller 133d, A guide rail 134b and a second support roller 134c rotatably coupled to the second guide rail 134b and supported by the first guide rail 133c.

In this embodiment, the second guide rails 134b are provided as a pair and are spaced apart from each other and are coupled to the side wall of the second baffle plate 134.

The second support roller 134c is rotatably coupled to each of the second guide rails 134b and is connected to the first guide rail 133c of the first baffle plate 133 to be rotatably supported on the first baffle plate 133 .

The second baffle plate 134 having such a configuration is configured such that the second guide rail 134b is supported by the first support roller 133d and the second support roller 134c is supported by the first guide rail 133c, And can be stably supported and moved to the first baffle plate 133.

On the other hand, the second baffle plate driver 135 is connected to the second baffle plate 134 and moves the second baffle plate 134. The second baffle plate drive unit 135 includes an underwater motor 135a, a pinion gear 135b connected to the underwater motor 135a and rotated by an underwater motor 135a, And a rack gear 135c engaged with the pinion gear 135b.

The underwater motor 135a is disposed under the second baffle plate 134 and is supported by a motor bracket (not shown) connected to the inner wall of the partitioning member 120 or the separator 110. [

The separating device for a floating type offshore structure according to the present embodiment includes an inclination angle sensor (not shown) for detecting an inclination angle when a motion such as pitching or rolling motion of a floating ocean structure is detected, And a control unit (not shown) that receives the control signal and transmits a control signal to the second baffle plate driving unit 135.

In the present embodiment, the inclination angle sensor is composed of a gyroscope. Accordingly, the scope of the present invention is not limited, and various types of sensors capable of measuring the inclination angle of the floating ocean structure can be used, Can be used as a sensor.

Hereinafter, the operation of the separating apparatus for a floating offshore structure according to the present embodiment will be described with reference to a longitudinally variable horizontal baffle portion 132.

In the case of a calm sea state where the wave or the wave is small in size, the length-variable horizontal baffle portion 132 is formed in such a manner that the first baffle plate 133 and the second baffle plate 134 overlap with each other, Prevent overflow of ingredients.

On the other hand, in the case of a rough sea condition where the wave or the wave is large in size, the length-variable horizontal baffle portion 132 is formed by the first baffle plate 133 and the second baffle plate 134, To prevent the overflow of the water component.

As described above, the length-variable horizontal baffle portion 132 according to the present embodiment varies the length depending on the size of the motion, such as pitching or rolling motion of the floating ocean structure, It is possible to increase the separation efficiency of the oil component without receiving it.

Although the present invention has been described in detail with reference to the above drawings, the scope of the scope of the present invention is not limited to the above-described drawings and description.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

110: separator 120: partition member
130: Overflow blocking module 131: Horizontal baffle part
132: length-variable horizontal baffle part 133: first baffle plate
133a: first main body 133b:
133c: first guide rail 133d: first support roller
134: second baffle plate 134a: second body portion
134b: second guide rail 134c: second support roller
135: second baffle plate driving unit 135a: underwater motor
135b: Pinion gear 135c: Rack gear
140: momentum absorber 150: water extractor
160: gas outlet part 170: water outlet part
180: oil outflow portion 190: vertical baffle portion
H: Through hole Y: Inflow part

Claims (10)

A separator mounted on a floating offshore structure for separating a well fluid into a gas, oil and water component using a specific gravity difference;
A weir member provided inside the separator and containing the water component located below the oil component in the separator; And
And an overflow blocking module connected to the partitioning member to prevent overflow of the water component over the partitioning member during movement of the floating floating structure. The method according to claim 1,
In the above-described overflow prevention module,
And a horizontal baffle portion coupled to an upper end of the partition member and disposed in a direction intersecting the partition member. 3. The method of claim 2,
Wherein the horizontal baffle portion comprises a lengthwise variable baffle portion having a length capable of expanding and contracting. The method of claim 3,
The length-variable horizontal baffle portion includes:
A first baffle plate coupled to an upper end of the partition member;
A second baffle plate that is movably connected to the first baffle plate; And
And a second baffle plate driver connected to the second baffle plate for moving the second baffle plate. 5. The method of claim 4,
Wherein the first baffle plate comprises:
A first body portion having a plurality of through holes; And
And a guide portion connected to the first body portion and supporting the second baffle plate and guiding movement of the second baffle plate. 6. The method of claim 5,
The guide portion
A first guide rail to which the second baffle plate is connected; And
And a first support roller rotatably coupled to the first guide rail and supporting the second baffle plate. The method according to claim 6,
Wherein the second baffle plate comprises:
A second body portion having a plurality of through holes;
A second guide rail connected to the second main body and supported by the first support roller; And
And a second support roller rotatably coupled to the second guide rail and supported by the first guide rail. 5. The method of claim 4,
Wherein the second baffle plate driving unit includes:
Underwater motor;
A pinion gear connected to the underwater motor and rotated by the underwater motor; And
And a rack gear provided on the second baffle plate and engaged with the pinion gear. 5. The method of claim 4,
An inclination angle sensor for sensing an inclination angle of the floating ocean structure during movement; And
And a control unit for receiving a detection signal of the inclination angle sensor and transmitting a control signal to the second baffle plate driving unit. 3. The method of claim 2,
Further comprising a plurality of longitudinal baffle portions disposed in the interior of the separator and disposed in a direction parallel to the weir member.

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