KR20150123054A - Drilling system and drilling offshore structure - Google Patents

Abstract

Disclosed are a drain system and a drilling offshore structure. According to the present invention, the drain system comprises: a drain separation storage unit provided on a hull wherein a drain introduced from a risk region having at least one of a drill floor, a well test region, and a drain which is introduced from a non-risk region except for the risk region, respectively separated to be stored; a drain tank unit provided in the hull wherein a drain which is supplied by being separated into a sediment and a material except for the sediment in the drain separation storage unit is stored; and a sediment supply unit provided in the hull, supplying at least a portion of the sediment supplied to the drain tank unit to a slope water processing unit which separates a drain into solid waste and waste oil by bypassing the drain tank unit.

Description

DRAINING SYSTEM AND DRILLING OFFSHORE STRUCTURE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain system and a drilling offshore structure, and more particularly, to a drainage system and a drilling offshore structure for treating a drain including oil, rainwater, solid matter and the like introduced from a deck or a drill floor.

With the rapid development of international industrialization and industry, the use of earth resources such as oil is gradually increasing, and thus the stable production and supply of crude oil is becoming an increasingly important issue globally.

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 drilling rig equipped with a hull has been developed.

Conventional submarine drilling has been mainly used for a rig ship or a fixed platform for underwater drilling which can be sailed only by other tugboats and which is used for drilling underwater at anchor point on the sea using a mooring device.

In recent years, however, drill ships and FPSO (Floating, Production, Storage and Offloading), which are manufactured in the same form as ordinary ships, have been developed to mount advanced drilling equipment and to navigate with their own power. Has been used for subsea drilling and production.

In order to develop small-scale oilfields, drilling rigs are designed to be able to navigate powerlessly without a tugboat, depending on the working conditions that need to be moved frequently.

Drill floor, Mud module, Drilling module, Pipe deck, Riser deck and Subsea equipment module are used at the top of deck of conventional drill ship. Module), and so on.

A drain tank is disposed at a lower portion of the deck to receive drains including oil, rainwater, mud, and the like introduced from the above-described structure. This conventional drain processing system stores and processes all the drains introduced from the above-described structure in one drain storage tank. That is, the drained drain from all the structures is introduced into the drain storage tank through one pipe. However, since the drain is composed of a mixture of various oil components and mud, the mud deposits occur under the drain storage tank over a certain period of time, and drain treatment becomes difficult.

Also, a large amount of rainwater flows into the drain storage tank due to a large number of structures during rainy days, and the drain including the rainwater flowing into the capacity limit of the drain storage tank can not be substantially drained.

A prior art for solving such conventional problems is disclosed in Korean Patent Registration No. 10-1250775 (March 03, 2013) "Drilling Line Drain Processing Apparatus". The prior art described above deals with a drain that is divided into a mud inflow region into which the mud is introduced and a non-mud inflow region.

This system is advantageous in that it handles incoming mud from a relatively large mud-infused drill floor or mud module process. However, since the mud is introduced into the mud work area or the submarine equipment module, which is the non-mud inflow area disclosed in the above-mentioned prior art, and solid matter other than the mud is introduced, it is insufficient to process the mud or solid material flowing in the non- There is a dot.

In addition, drilling and offshore structures such as drillships are becoming increasingly competitive due to high added value. In order to compensate for this trend, improvement measures are needed to reduce the construction cost.

Korean Patent Registration No. 10-1250775 (Samsung Heavy Industries Co., Ltd.) 2013.03.29

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method and apparatus for efficiently processing a drain introduced from all regions without distinguishing between a mud inlet region and a non-mud inlet region, Drainage system and a drilling offshore structure.

According to an aspect of the present invention, there is provided a hull comprising: a drain provided from a dangerous area including at least one of a drill floor and a well test area; and a drain provided from a non- A drain separation / storage unit; A drain tank part provided in the hull and storing a drain supplied separately from the sediment and the sediment in the drain separation / storage part; And a sediment supply unit provided in the hull for supplying at least a part of the sediment supplied to the drain tank to the slop water treatment unit for bypassing the drain tank unit and separating the drain from the solid waste and the waste oil, A structure may be provided.

Wherein the sediment supply unit includes: a branch line branched from a line for supplying sediment stored in the drain separation / storage unit to the drain tank unit and connected to the slop water treatment unit; And a sediment supply pump provided in the branch line.

The sediment supply unit may further include a check valve provided in the sediment supply line between the sediment supply pump and the slop water treatment unit.

The drain separation / storage unit may include: a first tank for storing the drain introduced from the dangerous area; And a second tank in which the drain introduced from the non-hazardous region is stored.

The bottoms of the first tank and the second tank may be inclined.

Wherein the drain tank portion includes a first drain tank in which a drain supplied from the first tank is stored; A second drain tank in which a drain supplied from the second tank is stored; And a drain holding tank in which the drains supplied from the first drain tank and the second drain tank are stored.

The drain tank may further include a line connecting the first drain tank and the drain holding tank and a transfer pump provided on a line connecting the second drain tank and the drain holding tank.

And a supply direction control unit provided in a connection line connecting the transfer pump and the drain holding tank to supply the drain discharged from the transfer pump to the drain holding tank or outboard.

Wherein the supply direction control unit comprises: an oil analyzer provided in the connection line and analyzing the oil in the drain; And a direction control valve provided on the connection line and supplying the drain to the drain holding tank or outboard depending on the oil content analyzed in the oil analyzer.

Wherein the sediment supply unit comprises: a connector connected to a line for supplying sediment stored in the drain separation / storage unit to the drain tank; And a sediment supply line connected at one end to the connector and at the other end to the slop water treatment section.

According to another aspect of the present invention, there is provided a hull comprising: a drain provided from a dangerous area including at least one of a drill floor and a well test area; and a drain provided from a non- A drain separation / A drain tank part provided in the hull and storing a drain supplied separately from the sediment and the sediment in the drain separation / storage part; And a sediment supply unit provided in the hull and supplying at least a part of the sediment supplied to the drain tank to the slop water treatment unit for bypassing the drain tank to separate the drain into solid waste and waste oil, Can be provided.

Embodiments of the present invention can provide safety by separately supplying a dangerous area including a drill floor and a drain introduced from a non-hazardous area except for a dangerous area, and the sediment introduced into the drain tank is bypassed to the drain tank And is directly supplied to the slop water treatment section, it is possible to improve the treatment ability of the sediment as a solid material.

In addition, since the solid material including the mud of the drain separation / storage unit can be continuously separated, the solid material including the mud can be prevented from moving to the next step, thereby reducing the clogging of the pipe and the load of the pump.

Furthermore, by keeping the drain tank portion clean, the drain can be directly discharged outboard when the drain oil concentration is kept below a certain level.

1 is a schematic view of a drain system according to a first embodiment of the present invention.
2 is a schematic view of a drain system according to a second embodiment of the present invention.
3 is a schematic view of a drain system according to a third embodiment of the present invention.
4 is a schematic view of a drain system according to a fourth embodiment of the present invention.

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. Like reference symbols in the drawings denote like elements.

In this embodiment, the drilled offshore structure includes all of the floating or fixed offshore structures in which the drill ship, the semi-submerged league, as well as the drain system are installed.

1 is a schematic view of a drain system according to a first embodiment of the present invention.

As shown in this figure, the drain system 1 according to the present embodiment is provided with a drain which is provided in the hull and includes at least one of a drill floor and a well test area, and a non- A drain tank part 200 provided in the hull and supplied with and storing a drain stored in the drain separation and storage part 100, A drain supply unit 300 connected to the drain tank unit 100 and the drain tank unit 200 for separating the drain stored in the drain separation and storage unit 100 into a material other than sediment and sediment and supplying the separated material to the drain tank unit 200, And is provided in a connection line connecting the pump 240 and the drain holding tank 230 to supply the drain discharged from the transfer pump 240 to the drain holding tank 230 or outboard And the feed direction of the controller 400, provided in the hull and a slop water processing section 500 for separating the solid waste to drain the waste oil which is supplied from the drain tank 200.

The drain separating and storing unit 100 is a place where the drains from the upper decks provided in the main deck and the main deck are primarily stored. The drain separating and storing unit 100 removes the drains from the dangerous area including the drill floor and the well test area, And the drains from the non-hazardous area except the area are separately stored.

In the present embodiment, the dangerous area refers to a zone where there is a possibility of an explosive gas. The hazardous area includes a drill floor, a well test area, a room where a shale shaker is installed, a mud process tank room, And a cutting dryer area for drying the cuts returned through the riser during operation.

In the present embodiment, the non-hazardous area is an area excluding the above-mentioned hazardous area, and includes a drilling module, a mud module, a main deck, a drill pipe storage area which is an upper area of the main deck, .

1, the drain separation / storage unit 100 includes a first tank 110, which is connected to a hazardous area by a line and stores drains flowing from the hazardous area, And a second tank 120 connected to the second tank 120 and storing the drain introduced from the non-hazardous area.

In this embodiment, the drains introduced into the first tank 110 and the second tank 120 include solid materials including oil, rainwater, seawater, mud, etc., and the solid material is discharged by self- 1 tank 110 and the bottom of the second tank 120, respectively. The solid material, that is, the sediment, which has been submerged, is supplied to the drain tank unit 200 by a drain supply unit 300 to be described later. In this embodiment, the first tank 110 and the second tank 120 may be inclined as shown in Fig.

On the other hand, in this embodiment, as shown in FIG. 1, a three-way valve (TV) is provided on the line connecting the well test region and the drill floor and the first tank 110 among the dangerous areas, The drain introduced from the floor may be sampled and supplied to the first tank 110 or discharged outboard.

Also, in this embodiment, a three-way valve (TV) is provided on a line connecting the main deck, the drill pipe storage area, the riser deck and the second tank 120 among the non-hazardous areas, The drain introduced through this line may be sampled and supplied to the second tank 120 or discharged out of the tank.

In this embodiment, when heavy rain is introduced from an open deck, for example, a drill floor, a well test area, a main deck, a drill pipe storage area, a riser deck, etc., rainwater is stored in a separate tank It is possible to open the three-way valve (TV) and to discharge the rainwater to the outboard area. In this embodiment, the heavy rain can be considered as 25 mm / h.

In this embodiment, when the water level of the first tank 110 and the second tank 120 reaches the danger level, the contents stored in the first tank 110 and the second tank 120 can be discharged outboard .

The drain tank portion 200 stores the drain supplied from the drain separation / storage portion 100. The drain stored in the drain tank portion 200 is discharged to the outside of the ship in accordance with the amount of the oil contained in the drain tank portion 200, And is supplied to the processing unit 500.

1, the drain tank unit 200 includes a first drain tank 210 in which the drain supplied from the first tank 110 is stored, a second drain tank 210 in which the drain is supplied from the second tank 120, A drain holding tank 230 in which the drain supplied from the first drain tank 210 and the second drain tank 220 is stored and a drain tank 230 in which the drain supplied from the first drain tank 210 And the drain holding tank 230 and a transfer pump 240 provided on a line connecting the second drain tank 220 and the drain holding tank 230 to each other.

The drain supplied from the first tank 110 is stored in the first drain tank 210 and the drain supplied from the second tank 120 is stored in the second drain tank 220, The drain tanks are connected to the first tank 110 and the second tank 120 in mutually independent lines, as shown in Fig. Therefore, the drain flowing into the hazardous area and the drain flowing from the non-dangerous area are separately stored, so that stability can be achieved.

The first drain tank 210 and the second drain tank 220 may be provided with a venting apparatus such as a valve capable of discharging gas therein and may be provided in the first drain tank 210 and the second drain tank 220, Since the drain is relatively more dangerous than the drain stored in the second drain tank 220, a separate purifier can be provided only in the first drain tank 210.

1, the transfer pump 240 of the drain tank unit 200 is connected to the first drain tank 210 and the second drain tank 220, respectively, so as to discharge the drains stored in the drain tanks 210 and 220 To the drain holding tank (230).

1, one pair of the transfer pumps 240 may be provided in parallel to each of the drain tanks 210 and 220. In the front line of the transfer pump 240, A check valve CV may be provided.

1, the drain, which is stored in the drain holding tank 230 of the drain tank unit 200, is supplied to the slop water treatment unit 500 through a line connected to the slop water treatment unit 500, Oil. ≪ / RTI >

The drain supplying unit 300 divides the drain stored in the drain separating and storing unit 100 into substances other than sediment and sediment and supplies the divided substances to the drain tank unit 200.

1, the upper part of the drain supply part 300 is connected to the first tank 110 or the second tank 120 and the lower part thereof is connected to the drain tank or the second drain tank 220, The first line 310 is connected to the first tank 110 or the second tank 120 and the lower portion is connected to the first drain tank 210. Or a second line (320) connected to the second drain tank (220) to supply the material excluding the sediment to the drain tank part (200).

The first line 310 may be disposed at the lower side of the first tank 110 or the second tank 120 and the second line 320 may be disposed at the lower side of the first tank 110 or the second tank 120. In this embodiment, (Not shown). This is so that the sediment is supplied through the first line 310 and the substance, i.e., fluid except the sediment, is supplied through the second line 320.

The upper end of the second line 320 may be disposed at the upper side of the first tank 110 or the second tank 120 so that the first tank 110 or the second tank 120 may have an appropriate level There is an advantage that sticking of the sediment including the mud can be prevented.

In this embodiment, the first tank 110 and the second tank 120 are disposed at positions higher than the first drain tank 210 and the second drain tank 220, And the drain to the drain tank can be supplied to the line 310 and the second line 320.

The supply direction control unit 400 is provided on a connection line connecting the transfer pump 240 and the drain holding tank 230 and serves to supply the drain discharged from the transfer pump 240 to the drain holding tank 230 or outboard .

1, the supply direction control unit 400 includes an oil analyzer 410 provided in a connection line connecting the transfer pump 240 and the drain holding tank 230 to analyze oil in the drain, And a direction control valve 420 provided on the connection line and supplying the drain to the drain holding tank 230 or outboard depending on the oil content analyzed by the oil analyzer 410.

The oil analyzer 410 of the supply direction control unit 400 analyzes the content of oil in the drain supplied from the transfer pump 240 and transmits the analyzed oil content to the control unit and the control unit controls the direction control valve 420 Can be operated.

For example, when the content of the oil analyzed in the oil analyzer 410 is less than 15 ppm, the control unit may control the directional control valve 420 to discharge the drain to the outside, and if the oil is 15 ppm or more, ).

In this embodiment, the directional control valve 420 may be a three-way valve (TV).

The slop water treatment unit 500 separates the drain supplied from the drain holding tank 230 into solid waste and waste oil or separates the separated solid waste or waste oil into a solid waste tank ST or a waste oil tank OT It serves as a supplier.

In this embodiment, the slop water treatment unit 500 includes a centrifugal separator (not shown) for separating the solid material from the drain supplied from the drain holding tank, and a centrifugal separator for separating the oil and water from the fluid other than the solid material separated from the centrifugal separator And a wastewater separator (not shown).

In addition, in the present embodiment, the slop water treatment unit 500 may further include a slop pump (not shown) for supplying the separated solid material or oil to the solid waste tank or the waste oil.

In the present embodiment, the drain separation / storage unit 100, the drain tank unit 200, the drain supply unit 300, the supply direction control unit 400 and the slop water treatment unit 500 are connected to the moonpool and the bulk tank room a bulk tank room, and a drain tank room.

The operation state of this embodiment will be described below with reference to Fig. This embodiment will be described on the basis of the dangerous area because only the distinction between the dangerous area and the non-hazardous area is the same.

The drain introduced from the dangerous area is supplied to the first tank 110 unless discharged by the three-way valve TV. The drain supplied to the first tank 110 is separated into a material excluding the sediment and the sediment that sink by self weight in the first tank 110. The sediment is discharged through the first line 310, 2 line 320 to the first drain tank 210. Strictly speaking, not only sediment but also liquid is stored in the first tank 110 and the second tank 120, so that sediment and liquid are discharged together through the first line 310.

The drain stored in the first drain tank 210 is supplied to the supply direction control unit 400 by the transfer pump 240. When the oil content of the drain analyzed by the oil analyzer 410 of the supply direction control unit 400 is less than a certain ppm, for example, less than 15 ppm, it is discharged to the outside of the tank, and is supplied to the drain holding tank 230.

The drain stored in the drain holding tank 230 may be supplied to the slop water treatment unit 500 and may be separated into solid waste and waste oil, or may be continuously stored without being separated and then discharged to the land.

When the separation process is performed in the slop water treatment unit 500, the centrifugal separator separates the solid material and the solid material, and the material except the solid material is separated into the fluid other than the oil and the oil in the separator.

The separated solid material can be supplied to the solid waste tank (ST) by the slop pump and the separated oil can be supplied to the waste oil tank (OT) by the slop pump and stored.

As described above, according to the present embodiment, the dangerous area including the drill floor and the drain introduced from the non-hazardous area other than the hazardous area can be separately supplied to provide safety, The drain can be separated and supplied to the drain separating and storing unit separately from the sediment and sediment to efficiently treat the drain.

2 is a schematic view of a drain system according to a second embodiment of the present invention.

The drain system 1a according to the present embodiment is provided with a pair of feed pumps 240 arranged in pairs in the first embodiment and pumping sediment and materials other than sediment together, There is a difference in that a separate sediment supply unit 600 for pumping sediment that has settled in the first drain tank 210 and the second drain tank 220 directly to the slop water treatment unit 500 is provided. As a result, this embodiment can reduce the cost and has an advantage that the sediment can be efficiently treated.

2, the sediment supply unit 600 is branched from the first line 310 and connected to the slop water treatment unit 500, and is connected to the first drain tank 210 or the second drain tank A sediment supply pump 620 provided in the branch line 610 and a sediment supply pump 620 and a slop water treatment unit 500 And a check valve 630 provided on the branch line 610 between the check valve 630 and the check valve 630.

In this embodiment, the sediment supply pump 620 may be a STP feed pump which is smaller in size and less expensive than the transfer pump 240 which is a centrifugal pump.

In this embodiment, the sediment supply unit 600 may further include a joint line 640 connecting the line connecting the transfer pump 240 to the drain tank 210 or 220 and the branch line 610.

3 is a schematic view of a drain system according to a third embodiment of the present invention.

The drain system b according to the present embodiment supplies the sediment that has settled to the drain separation / storage unit 100 at the lower side of the drain separation / storage unit 100, which is not the lower side of the drain tank, to the slop water treatment unit 500 There is a difference in that a sediment supply unit 700 is additionally provided.

That is, the present embodiment may further include the sediment supply unit 700 of the present embodiment in addition to the sediment supply unit 600 of the second embodiment described above, or may include only the sediment supply unit 700 of the present embodiment.

3, the sediment supply unit 700 includes a connector 710 connected to the upper end of the first line 310, one end connected to the connector 710 and the other end connected to the slop water treatment unit 500, And a sediment supply line 720 connected to the sludge supply line 720.

The present embodiment has an advantage in that the sediment that has settled in the drain separation / storage unit 100 after being introduced from the dangerous area or the non-dangerous area is connected to be supplied directly to the slop water treatment unit 500, .

4 is a schematic view of a drain system according to a fourth embodiment of the present invention.

The drain system 1c according to the present embodiment includes a second tank 120 for separating and storing drains flowing from a non-hazardous area in the above-described second embodiment, a second tank 120 for separating and storing the drains flowing from the non- The present invention is different from the second embodiment in that a drain supplied from the non-hazardous area is directly supplied to the second drain tank 220 without the drain supply unit 300 connecting the drain tank 300 and the drain tank 300.

The drain introduced from the non-hazardous area is safe because the drain is less dangerous than the drain introduced from the dangerous area, and the treatment ability of the sediment is secured by the sediment supply part 600 that supplies the sediment from the drain tank to the slop water treatment part 500 There is an advantage that the cost required for installing the second tank 120 can be reduced.

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.

1, 1a, 1b, 1c: drain system 100: drain separation storage unit
110: first tank 120: second tank
200: drain tank part 210: first drain tank
220: second drain tank 230: drain holding tank
240: Feed pump 300: Drain supply
310: first line 320: second line
400: supply direction control unit 410: oil analyzer
420: direction control valve 500: slop water treatment section
600,700: sediment supply part 610: branch line
620: Sediment supply pump 630: Non-return valve
640: Joint line 650: Join line
710: connector 720: sediment supply line
CV: check valve OT: waste oil tank
ST: Solid waste tank TV: Three-way valve

Claims (11)

A drain separation storage unit provided in the hull and separated from the drain, the drain entering from the hazardous area including at least one of the drill floor and the well test area, and the drain from the non-hazardous area excluding the dangerous area;
A drain tank part provided in the hull and storing a drain separated from the sediment and the sediment in the drain separation / storage part; And
And a sediment supply unit provided in the hull for supplying at least a part of the sediment supplied to the drain tank to the slop water treatment unit for bypassing the drain tank to separate the drain from the solid waste and the waste oil, . The method according to claim 1,
The sediment supply unit includes:
A branch line branched from a line for supplying sediment stored in the drain separation / storage unit to the drain tank unit and connected to the slop water treatment unit; And
And a sediment supply pump provided in the branch line. The method of claim 2,
Wherein the sediment supply unit further comprises a check valve provided in the sediment supply line between the sediment supply pump and the slop water treatment unit. The method according to claim 1,
The drain separation /
A first tank in which the drain introduced from the dangerous area is stored; And
And a second tank in which the drain introduced from the non-hazardous area is stored. The method of claim 4,
Wherein the bottom of the first tank and the bottom of the second tank are inclined. The method of claim 4,
The drain tank portion
A first drain tank in which a drain supplied from the first tank is stored;
A second drain tank in which a drain supplied from the second tank is stored; And
And a drain holding tank for storing a drain supplied from the first drain tank and the second drain tank. The method of claim 6,
The drain tank portion
Further comprising a line connecting the first drain tank and the drain holding tank and a feed pump provided on a line connecting the second drain tank and the drain holding tank. The method of claim 7,
And a supply direction control unit provided on a connection line connecting the transfer pump and the drain holding tank to supply a drain discharged from the transfer pump to the drain holding tank or outboard. The method of claim 8,
Wherein the supply direction control unit includes:
An oil analyzer provided in the connection line for analyzing the oil in the drain; And
And a direction control valve provided on the connection line for supplying the drain to the drain holding tank or outboard depending on the oil content analyzed by the oil analyzer. The method according to claim 1,
The sediment supply unit includes:
A connector connected to the line for supplying the sediment stored in the drain separation / storage unit to the drain tank; And
And a sediment supply line, one end of which is connected to the connector and the other end of which is connected to the slop water treatment section. A drain separation storage unit provided in the hull and separated from the drain, the drain entering from the hazardous area including at least one of the drill floor and the well test area, and the drain from the non-hazardous area excluding the dangerous area;
A drain tank part provided in the hull and storing a drain separated from the sediment and the sediment in the drain separation / storage part; And
And a sediment supply unit provided in the hull for supplying at least a part of the sediment supplied to the drain tank to the slop water treatment unit for bypassing the drain tank to separate the drain from the solid waste and the waste oil.

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