KR101777520B1 - Drilling Machine Using A Packer in A Deep-Drilling, Cementing Apparatus including Thereof, and Cementing Method Using A Packer - Google Patents

Abstract

The present invention relates to a drilling machine using a packer in deep drilling, a cementing device, and a cementing method using the packer from which an inconvenience is removed where a drill bit is taken out and the cementing device is required to be inserted. To achieve this, the drilling machine for deep drilling in accordance with the present invention comprises: a packer (700) installed in an outer surface of a drilling machine (300) and expanded by a fluid supplied into an inner space thereof to seal a space with a casing (200); and repunching drills (800) installed in an upper part or a lower part of the packer (700). The cement cured inside a space may be repunched by the repunching drill (800). Accordingly, the present invention is able to omit time consumption due to a tripping-out work in deep drilling; thereby drastically shortening a construction time.

Description

Technical Field [0001] The present invention relates to a drilling machine using a packer in drilling, a cementing machine including the drilling machine, and a cementing method using a packer,

More particularly, the present invention relates to a drilling machine using a packer, a cementing device including the drill, and a cementing machine using the same in a deep drilling, which eliminates the inconvenience of removing the bit drill and inputting the cementing equipment. ≪ / RTI >

High-angle drilling refers to a technique for drilling to develop a deep ground layer at a depth of 2 km or more from the ground or the sea floor. This drilling technology is very important not only in the oil and gas resource industries but also in geothermal power generation, shale gas development, and underground storage of carbon dioxide.

Especially, the most important technique in deep drilling is the pneumatic stabilization technology, which smoothes the work during drilling, transfers drilling water, and prevents collapse of the drilling wall. Cementing techniques are often used to implement these techniques.

The cementing technology is to drill holes with drill bits and then to fill the space between the casing and the pneumatic wall with cement.

1 is a state diagram of a conventional drilling rig for deep drilling. 1, the drilling machine 30 and drilling machine 50 penetrate the borehole 40 and then the casing 20 is inserted and the space between the wall 10 and the casing 20 is filled with cement.

However, the conventional drilling and cementing apparatus as shown in FIG. 1 has the following problems. First, both the drilling machine 30 and the drilling machine 50 and their associated devices at a depth of 2 Km or more must be towed for a cementing operation (aka "Trip Out operation"). Then, a dedicated session equipment (eg, Float Collar, etc.) is put in to perform the cementing work. In other words, the conventional drilling of deep sea is a method in which the "drilling-casing installation-cementing work" is continuously repeated.

Such a conventional operation method has a disadvantage in that a long time is required for the trip-out operation. That is, the trip-out operation took a lot of time, and the trip-out operation repeatedly took a long time during the entire construction period.

Also, mud is used to improve the stability of the pond and drilling efficiency when drilling, but if the drilling section is unstable, the drainage may be lost and the loss may occur. In this case, there may be economical and temporal loss such as a problem of stabilization of the pneumatic wall, supplementation due to the loss of the technique, and the like.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a drilling rig using a packer in a drilling operation of a drill, And a cementing method using the cementing device and the packer including the same.

It is a second object of the present invention to provide a drilling rig using a packer in a drilling operation of a drill, which can cope with a sudden cementing operation without a trip-out operation of the drill when an unexpected hole stabilization problem occurs during drilling, And to provide a method of cementing using the same.

In order to accomplish the above object, according to one aspect of the present invention, there is provided a drilling rig for drilling a drilling rig, which is installed on an outer surface of a drill rig, is expanded by a fluid supplied into the drill rig, A packer 700 capable of sealing a space between the container and the container; And a re-drilling (800) installed at an upper portion or a lower portion of the packer (700). The cement cured in the space can be re-punctured by the re-drilling (800) Is provided.

The packer 700 further includes a packer film 730 which cuts off between the center hole 310 of the drilling machine 300 and the packer 700 and can be ruptured by the pressure of the fluid; And a packer case 720 for accommodating the packer 700 therein. The packer 700 may be received in a folded state in the packer case 720.

In addition, the packer case 720 may rupture or expand as the packer 700 expands.

The fluid is water (330) or cement liquid (350).

Further, the re-drilling drill 800 includes a bit drill 820 installed on a lower surface thereof; And a through hole 810 formed axially between the bit drill 820.

According to another aspect of the present invention, there is provided a drilling machine using a packer according to the present invention, A supply means capable of selectively supplying the desorption 330 or the cement liquid 350 to the center hole 310 of the drilling machine 300; And a casing 200 inserted between the air wall 100 and the drilling machine 300 and the center hole 310 extending to the drilling machine 500 at the end of the drilling machine 300. [ Which can be accomplished by a cementing device comprising a drill using a packer.

The supplying means includes a cement tank 600 in which the cement liquid 350 is stored; A first pressure sensor 650 for measuring the pressure of the supplied cement liquid 350; A drinking water tank (620) in which water (330) is stored; A second pressure sensor 660 for measuring the pressure of the supplied water 330; And a control unit for selecting or suspending supply of the fluid to be supplied based on the measured pressures of the first and second pressure sensors 650 and 660.

The cement liquid 350 is discharged from the area of the drilling machine 500 and the space between the air wall 100 and the casing 200 and the space between the casing 200, the drill 300 and the expanded packer 715 Charge.

A discharge pipe 670 connected to the upper portion of the casing 200; And a slurry tank 640 connected to the discharge pipe 670.

The above-described object of the present invention is further classified into a category (S100) in which a drilling machine 300 drills a drilling hole 400 and then inserts a casing 200 into a drilling hole 400; (S110) of supplying the first pressure reed (330) through the center hole (310) of the drill (300) to expand the packer (700); (S120) of supplying the cement liquid (350) instead of the censor (330) when the pressure of the censer (330) becomes the second pressure higher than the first pressure to fill the inside and outside of the casing (200); Curing the cement liquid 350 (S130); (S140) of re-puncturing the cement between the casing (200) and the drill (300) by a re-drilling machine (800) installed around the driller (300) by rotating the drill Can be achieved by a cementing method using a packer in drilling.

The expanding step (S110) of the packer (700) includes a step (S112) in which the packer film (730) is ruptured by the first pressure; (S114) filling filler 330 into folded packer 710 through ruptured Packer membrane 730; A step S116 in which the packer case 720 around the packer 700 ruptures or expands by the expanding packer 700; And a step (S118) of sealing the space between the borehole 300 and the casing 200 by bringing the expanded packer 715 into close contact with the inner surface of the casing 200.

In addition, the filling step (S120) of the cement liquid 350 includes a step (S122) of cutting off the supply of the water mixture 330; (S124) of supplying the cement liquid 350 through the center hole 310 of the drilling machine 300; A step S126 in which the cement liquid 350 is discharged from the drilling machine 500 at the end of the drilling machine 300; (S128) filling the space between the air wall 100 and the casing 200 and the space between the casing 200, the drilling machine 300 and the expanded packer 715 can do.

Further, the re-drilling step (S140) may further include a step of supplying the mixed water between the casing (200) and the drill (300).

The re-drilling step S140 includes a step S142 in which the reamer drill 800 installed around the driller 300 is rotated and lowered by rotating the drummer 300 downward; A step (S144) of re-puncturing the cement cured between the casing (200) and the drilling machine (300) by the bit drill (820) formed at the lower part of the re-drilling drill (800); And a step S146 in which the cement pieces 830 generated in the re-drilling process are discharged through the through holes 810 between the bit drills 820.

Further, the method may further include a step S150 of further drilling with the drilling machine 300. [

In addition, in the expansion step (S110) of the packer (700), the water (330) supplied as the first pressure through the center hole (310) of the drilling machine (300) is discharged from the drilling machine And then collected along the casing 200 and then collected by the discharge pipe 670 into the water storage tank 620. The operation can be performed simultaneously.

According to an embodiment of the present invention, it is possible to omit the time required for the trip-out operation in the drilling of the deep sea. Therefore, the construction period can be remarkably shortened.

In addition, even if an unexpected problem of stabilizing the paved wall occurs during the drilling operation, there is a maneuver which can cope with the cementing operation immediately without tripping out the drilling machine. This can prevent the loss of completion and minimize the economic burden due to the supplementation.

In addition, after the completion of the cementing, the cementing section is re-punctured so that the lubrication and further drilling of the drilled water can be performed.

In addition, there is a merit that there is no need to install special equipment for cementing, and it has the advantage of not affecting the pore wall even after dismantling the packer system after completing cementing.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further understand the technical idea of the invention. And should not be construed as interpreted.
1 is a state diagram of a conventional drilling rig for deep drilling,
FIG. 2 is a schematic system block diagram of a drilling rig using a packer and a cementing device including the drill in the drilling of a drilling rig according to the present invention,
Fig. 3 is a state diagram showing a state where the packer of the drill shown in Fig. 2 is contracted;
Fig. 4 is a state diagram showing the packer of the drill shown in Fig. 3 in an expanded state,
Fig. 5 is a partially enlarged cross-sectional view of a packer portion in Fig. 3,
FIG. 6 is a partially enlarged cross-sectional view of a packer portion in FIG. 4,
7 is a state diagram showing a process of supplying a cement liquid in a state where a packer is expanded in a cementing apparatus of the present invention,
FIG. 8 is a cross-sectional view of a vicinity of the re-drilling drill 800 in the re-drilling step (S140) of the cementing method of the present invention,
FIG. 9 is a flowchart illustrating a cementing method using a packer in a drilling operation in accordance with an embodiment of the present invention.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings. While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are herein described in detail.

It is noted that the terms "comprises" or "having" in this application are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Example  Configuration

FIG. 2 is a schematic system block diagram of a drilling rig using a packer and a cementing device including the drilling rig in the drilling of a drilling rig according to the present invention. As shown in FIG. 2, a cement tank 600 in which a cement liquid is stored and a desalination tank 620 in which desalinated water is stored are provided on the ground.

The first pressure sensor 650 measures the pressure of the cement liquid pumped from the cement tank 600 and the second pressure sensor 660 measures the pressure of the water discharged from the water tank 620. A pump for the supply of cement fluid and water is also constructed but not shown to aid understanding. The discharge port of the cement tank 600 is connected to the center hole 310 and the discharge port of the water storage tank 620 is connected to the center hole 310. The discharge port of the water receiving tank 620 is extended so as to supply water to the space between the drilling machine 300 and the casing 200. [

The control unit (not shown) is connected to the first and second pressure sensors 650 and 660, and is connected to a cement liquid pump (not shown) and a water pump (not shown) to control the discharge pressure.

The discharge pipe 670 is provided on one side of the upper portion of the casing 200 and is connected to the slurry tank 640 to store the slurry (soil, water, rock chips, etc.) generated in excavation or drilling in the slurry tank 640 have.

The casing (200) is a metal pipe inserted between the excavated wall (100) and the drilling machine (300). A center hole 310 is formed at the center of the drill 300, and a drill 500 is attached to the end.

FIG. 3 is a state view showing a state where the packer is contracted in the drill shown in FIG. 2, and FIG. 4 is a state diagram showing the packer of the drill shown in FIG. 3 in an expanded state. 3 and 4, the packer 700 is installed at the upper portion of the drill 500 in the lower part of the drill 300. [ The packer 700 keeps the collapsed state as shown in Fig. 3 at the outer peripheral surface of the drill 300. [ Therefore, the packer 700 does not hinder the drilling operation of the drill rig 300 at all.

The re-drilling machine 800 is located on the upper part of the packer 700 and attached to the outer peripheral surface of the drill machine 300. The re-drilling drill 800 is rotatable integrally with the drill 300 and has an outer diameter slightly smaller than the inner diameter of the casing 200 so as not to touch the inner surface of the casing 200.

4, the inflated packer 700 is sufficiently inflated to completely seal the inner surface of the casing 200 in the axial direction. For this purpose, the packer 700 is made of geotextile. Examples of the geotextile include knitted fabrics, woven fabrics, and nonwoven fabrics, and synthetic fibers made of polyamide, polyester, and polyurethane.

Fig. 5 is a partially enlarged cross-sectional view of the packer portion in Fig. 3, and Fig. 6 is a partially enlarged cross-sectional view of the packer portion in Fig. 5 and 6, the packer film 730 is provided on the side surface of the center hole 310 of the drilling machine 300. The packer film 730 becomes a packer film 735 ruptured and ruptured as shown in FIG. 6 when the number of supplied fibers 330 is equal to or higher than a predetermined pressure (for example, 110% of the normal pressure). The packer film 730 is a kind of diaphragm film that blocks the entering water 330 during excavation from entering the packer 700.

The packer case 720 maintains the packaged state on the outer surface of the drill 300 when drilling and accommodates the folded packer 710 therein. The packer case 720 expands the expanded packer 715 when the packer 700 is inflated to become the expanded packer 715 and becomes the ruptured packer case 725. To this end, the packer case 720 can be made of a thin synthetic resin material. The packer case 720 is made of a rubber material and can swell with a packer 715 that expands without rupturing. The packer case 720 made of rubber can be inflated to further increase the sealing force.

The packer 700 is in a minimum volume in the packer case 720 by the folded packer 710 during the excavation and is tightly attached to the inner surface of the casing 200 as shown in FIG. . For this purpose, the packer 700 can be arranged in three to five peripheries of the drilling machine 300. The water 330 for expanding the packer 700 may be supplied through the center hole 310 or may be supplied through a separate supply line on the outer surface of the drill 300. [

7 is a state diagram showing a process of supplying cement liquid in a state where the packer is expanded in the cementing apparatus of the present invention. 7, the cement liquid 350 supplied through the center hole 310 is raised while filling the air gap 120 between the air wall 100 and the casing 200, 300 and the casing 200 to fill a space surrounded by the drill 300, the casing 200, and the expanded packer 715.

For this purpose, the drill 500 includes a plurality of discharge holes (not shown) communicating with the center hole 310.

8 is a partially enlarged cross-sectional view of the re-drilling drill 800 in the re-drilling step S140 of the cementing method of the present invention. As shown in FIG. 8, the re-drilling drill 800 is firmly fixed in the circumferential direction of the drill 300 and is integrally rotatable with the drill 300. The outer diameter of the re-drilling drill 800 has such a size as not to touch the inner surface of the casing 200. A bit drill 820 is formed on the lower surface of the re-drilling drill 800 to cure the cured cement 355. The bit drill 820 is smaller than the size of the drill 500 so that it does not affect during a normal drilling operation.

A through hole 810 is formed in the axial direction between the bit drill 820. The through hole 810 is configured to allow a small cement piece 830, which has been broken by the bit drill 820, to be discharged from the lower surface of the re-drilling drill 800 through the through hole 810. The through hole 810 also serves as a passage through which water can flow. In order to facilitate the discharge of the cement pieces 830, irrigation water may be supplied to the upper portion of the re-drilling drill 800.

Example  action

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 9 is a flowchart illustrating a cementing method using a packer in a drilling operation in accordance with an embodiment of the present invention. First, as shown in FIG. 3, the driller 300 drills the drilling hole 400 and inserts the casing 200 into the drilling hole 400 (S100). At this time, the driller 300 does not trip out, but remains intact in the borehole 400, and the packer 700 maintains a contracted state as shown in FIG.

Then, the packer 700 is inflated by supplying the reed 330 of the first pressure through the center hole 310 of the drill 300 (S110). In other words, the control unit (not shown) monitors the second pressure sensor 660 and supplies the excess water at a pressure slightly higher than the normal water supply pressure (for example, 100%) (e.g., 110%).

More specifically, the expanding step (S110) of the packer 700 will be described as follows. The packer film 730 is ruptured by the first pressure (110%) (S112). Then, the water filler 330 is filled into the folded packer 710 through the ruptured packer film 730 (S114). The packer case 720 around the packer 700 ruptures or expands due to the gradually expanding packer 700. (S116). At this time, a part of the supplied water 330 enters the inside of the packer 700 and the remaining part moves downward along the center hole 310. The lower water level 330 is discharged from the drill 500 at the end of the drill 300 and is lifted along the casing 200 or the clearance gap 120 and then discharged to the receiving tank 620 by the discharge pipe 670 Collected.

In alternate embodiments, completion 330 may be provided via a separate external supply line. Then, the expanded packer 715 is brought into close contact with the inner surface of the casing 200 to seal the space between the borehole 300 and the casing 200 (S118).

Then, when the completion water 330 is sufficiently supplied and the expanded packer 715 no longer expands, the pressure of the intake water 330 becomes the second pressure (120%) higher than the first pressure (110%) . At this time, the control unit (not shown) cuts off the supply of the water 330 and supplies the cement liquid 350 instead to charge the inside and outside of the casing 200 (S120).

The filling step (S120) of the cement liquid 350 will be described in detail as follows. Referring to FIG. 7, first, the control unit cuts off the supply of water (330) (S122). Then, the cement liquid 350 is supplied through the center hole 310 of the drilling machine 300 (S124). The supplied cement liquid 350 is discharged from the drilling machine 500 at the end of the drilling machine 300 (S126). The discharged cement liquid 350 then fills the void wall gap 120, which is the space between the air wall 100 and the casing 200. Then, some cement liquid 350 fills the space between the casing 200, the drilling machine 300 and the expanded packer 715 (S128).

Then, the cement liquid 350 is cured and cured 355 for a sufficient time (S130).

Next, the drilling machine 300 is rotated and lowered to re-drill the cement between the casing 200 and the drilling machine 300 (S140). The re-enactment step (S140) will be described in detail as follows. Referring to FIG. 8, first, the reaming drill 800 installed around the drilling machine 300 is rotated and lowered by rotating the drilling machine 300 (S142). The cement 355 cured between the casing 200 and the drilling machine 300 is crushed into a small cement piece 830 by the bit drill 820 formed at the lower portion of the re-drilling drill 800 and re-punctured (S144). The cement pieces 830 generated in the re-drilling process are discharged through the through holes 810 between the bit drills 820 (S146). In this re-drilling step (S140), it is preferable to supply the water to the space between the casing (200) and the drill (300) for cooling to help discharge the cement pieces (830).

Then, if necessary, additional drilling can be performed with the drilling machine 300 (S150).

Through this process, the cementing operation can be completed quickly without tripping out of the drilling machine 300, and further excavation is possible if necessary. Therefore, the above-mentioned cementing work can be carried out in order to stabilize the pneumatic wall when necessary or when an unexpected situation occurs in the excavation process.

Although the present invention has been described in connection with the preferred embodiments set forth above, it will be readily appreciated by those skilled in the art that various other modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that all modifications are within the scope of the appended claims.

However,
20: casing,
30: Chiller,
40: borehole,
50: drilling drill,
100:
120:
200: casing,
300: a brewer,
310: center hole,
330: Isu,
350: cement liquid,
355: cured cement,
400: borehole,
500: drilling drill,
600: Cement tank,
620: Isolation tank,
640: Slurry tank,
650: first pressure sensor,
660: second pressure sensor,
670: discharge pipe,
700: Packer,
710: folded packer,
715: Expanded Packer,
720: Packer case,
725: Ruptured Packer Case,
730: Packer membrane,
735: ruptured Packer membrane,
800: Re-drilling drill,
810: Through hole,
820: bit drill,
830: Cement slab,
840: rotation direction,

Claims (16)

In the drilling rig for deep drilling,
A packer 700 installed on an outer surface of the drill 300 and expanded by a fluid supplied to the inside to seal a space with the casing 200; And
And a re-drilling drill (800) installed at an upper portion or a lower portion of the packer (700)
The packer (700)
A packer membrane (730) which cuts off between the center hole (310) of the drilling machine (300) and the packer (700) and can be ruptured by the pressure of the fluid; And
And a packer case (720) for accommodating the packer (700) therein,
The packer 700 is received in a folded state in the packer case 720,
Wherein the cement cured in the space is re-punctured by the re-drilling machine (800). delete The method according to claim 1,
The packer case (720) can be ruptured or expanded as the packer (700) expands. The method according to claim 1,
Wherein the fluid is water (330) or cement liquid (350). The method according to claim 1,
The re-drilling machine (800)
A bit drill 820 installed on the underside; And
And a through hole (810) formed in the axial direction between the bit drills (820). A drilling machine (300) using the packer according to any one of claims 1 to 5;
A supply means capable of selectively supplying the water 330 or the cement liquid 350 to the center hole 310 of the drill 300; And
And a casing (200) inserted between the air wall (100) and the drill (300)
Wherein the center hole (310) extends to a drill (500) at an end of the drill (300). The method according to claim 6,
Wherein the supplying means comprises:
A cement tank 600 in which the cement liquid 350 is stored;
A first pressure sensor 650 for measuring a pressure of the supplied cement liquid 350;
A reservoir tank (620) in which the completion (330) is stored;
A second pressure sensor 660 for measuring the pressure of the water supply 330 to be supplied; And
And a controller for selecting or suspending supply of the fluid based on the measured pressures of the first and second pressure sensors (650, 660). The cementing device The method according to claim 6,
The cement liquid 350 is discharged from the area of the drill 500 and is separated from the space between the air wall 100 and the casing 200 and the space between the casing 200 and the drill 300 and the expanded packer 715, And a space between the upper and lower drilling holes is filled. The method according to claim 6,
A discharge pipe (670) connected to the upper portion of the casing (200); And
And a slurry tank (640) connected to the discharge pipe (670). (S100) of inserting the casing (200) into the borehole (400) after the drilling machine (300) drills the drilling hole (400);
(S110) of supplying the first pressure water (330) through the center hole (310) of the drill (300) to expand the packer (700);
(S120) of supplying the cement liquid (350) instead of the mixed water (330) to fill the inside and outside of the casing (200) when the pressure of the mixed water (330) becomes a second pressure higher than the first pressure;
Curing the cement liquid 350 (S130); And
(S140) of re-puncturing the cement between the casing (200) and the drill (300) by re-drilling a drill (800) installed around the drill (300) by rotating the drill Wherein the drilling is performed by using a packer in a deep drilling operation. 11. The method of claim 10,
The expanding step (S110) of the packer (700)
A step S112 of rupturing the packer film 730 by the first pressure;
(S114) filling the interior (330) into the folded packer (710) through the ruptured Packer membrane (730);
A step S116 in which the packer case 720 around the packer 700 is ruptured or inflated by the packer 700 to be inflated; And
(S118) of sealing the space between the drilling machine (300) and the casing (200) with the expanded packer (715) closely attached to the inner surface of the casing (200) A method of cementing using a packer in a container. 11. The method of claim 10,
In the charging step S120 of the cement liquid 350,
Interrupting the supply of the water flow 330 (S122);
A step (S124) of supplying the cement liquid 350 through the center hole 310 of the drilling machine 300;
A step S126 of discharging the cement liquid 350 from the drilling machine 500 at the end of the drilling machine 300;
The discharged cement liquid 350 fills a space between the air wall 100 and the casing 200 and a space between the casing 200, the drill 300 and the expanded packer 715 S128). ≪ Desc / Clms Page number 24 > 11. The method of claim 10,
Wherein the re-drilling step (S140) further comprises supplying water between the casing (200) and the drilling machine (300). 14. The method of claim 13,
The re-puncturing step (S140)
A step S142 of lowering the drilling machine 300 by rotating the reaming drill 800 installed around the drilling machine 300;
The cement cured between the casing 200 and the drill 300 is re-punctured by a bit drill 820 formed at a lower portion of the re-drilling drill 800 (S 144);
And a step (S146) of discharging the cement pieces (830) generated in the re-drilling process through the through holes (810) between the bit drills (820) (S146) How to do it. 15. The method of claim 14,
The method of claim 1, further comprising the step of drilling (S150) the drill (300). 11. The method of claim 10,
In the expanding step S110 of the packer 700,
The mixed water 330 supplied at the first pressure through the center hole 310 of the drill 300 is discharged from the drill 500 at the end of the drill 300 and is lifted along the casing 200, (670) is collected by the pipe (670) to be carried out at the same time.

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