BOP pipe connection system

Abstract

The present invention relates to a BOP pipe connection system comprising: a plurality of shafts formed along a circular trajectory and configured to rotate by an external force, each shaft having a shaft screw thread formed on the outer circumferential surface thereof; a plurality of roller screws respectively disposed on the outer circumferential surfaces of the shafts and each having a roller screw thread formed on the outer circumferential surface thereof so as to be gear-coupled with the shaft screw thread; a nut provided in external contact with the different roller screws and having a nut screw thread along the inner surface thereof so as to be gear-coupled with the roller screw thread, the nut being moved upward and downward as the shafts rotate; and a moving part having a hollow cylindrical shape and connected to the nut, the moving part being configured to move upward and downward while pressing and fixing the outer circumferential surface of a pipe.

Description

BOP pipe connection system

[0001] The present invention relates to a BOP pipe connection system, and more specifically, to a BOP pipe connection system in which the entire system can operate even if some roller screws are damaged.

[0002] BOP stands for Blowout Preventer and is a device used to prevent explosions or irregular fluid ejections that may occur due to a sudden increase in pressure in a well (hole in an oil field) during oil and gas drilling operations. The BOP consists of multiple layers of valves and shut-off systems to prevent situations where fluid ejects uncontrollably due to a rapid rise in pressure in the well.

[0003] Specifically, to connect the lower pipe (P2) and the upper pipe (P2) located in the well as in FIG. 1, the upper pipe (P1) and the lower pipe (P2) are positioned to be connected as in FIG. 2, and then the hydraulic system (H) is operated. As in FIG. 3, as the hydraulic system (H) moves downward, it presses the fixing part (F), thereby fixing the connection between the upper pipe (P1) and the lower pipe (P2) by pressing the fixing part (F).

[0004] Conventionally, hydraulic drive systems were applied, requiring numerous auxiliary facilities such as hydraulic cylinders, valves, and pumps for operation. Furthermore, since they were installed and operated in deep sea environments, there was a problem where repair costs were excessively high in the event of a breakdown.

[0005] The purpose is to solve the aforementioned problems by providing a BOP pipe connection system that can be miniaturized without additional equipment.

[0006] To achieve the aforementioned purpose, the device is characterized by comprising: a shaft formed in multiple circular trajectories that rotates by an external force and has shaft threads formed on its outer surface; a plurality of roller screws provided on the outer surface of the shaft, each having roller threads formed on its outer surface to be gear-coupled with the shaft threads; a nut provided in external contact with different roller screws, having nut threads along its inner surface to be gear-coupled with the roller threads, and moving in an up-and-down direction as the shaft rotates; and a moving part having a hollow cylindrical shape that is connected to the nut and moves in an up-and-down direction to press and fix the outer surface of the pipe.

[0007] It is characterized by including: a gear located above the nut, fixed to the shaft and rotating, with gear threads formed on its outer surface; and a rotating part that rotates by an external force, is provided in external contact with different gears, and has a hollow cylindrical shape with rotational threads formed along its inner surface to engage with the gear threads.

[0008] The above-mentioned moving part is characterized by having a U-clamp provided to secure the moving part and the nut.

[0009] The above shaft is characterized by having a sensor that detects the movement of the nut.

[0010] It is characterized by having a clutch provided between the gear and the roller screw on the shaft.

[0011] The BOP pipe connection system according to the present invention has the following effects.

[0012] Since only a motor and roller screw need to be installed without additional equipment for operation, it is possible to make it smaller and lighter.

[0013] Repair costs can be reduced because the entire system operates even if some roller screws fail, and it is convenient because only the broken roller screws need to be replaced.

[0014] By using roller screws, the contact area is increased, allowing it to withstand heavy loads, such as explosions occurring in the BOP.

[0015] FIG. 1 is a drawing showing the prior art.

[0016] FIG. 2 is a drawing showing the prior art.

[0017] FIG. 3 is a drawing showing the prior art.

[0018] FIG. 4 is a perspective view showing a BOP pipe connection system according to the present invention.

[0019] FIG. 5 is a drawing showing a part of the BOP pipe connection system according to the present invention.

[0020] FIG. 6 is a cross-sectional view (A) of a BOP pipe connection system and a cross-sectional view (B) of a nut according to the present invention.

[0021] FIG. 7 is a cross-sectional view (A) of another embodiment of a BOP pipe connection system according to the present invention, and a cross-sectional view (B) of a nut.

[0022] FIG. 8 is a drawing showing the installation state of a U clamp in a BOP pipe connection system according to the present invention.

[0023] A preferred embodiment of the BOP pipe connection system according to the present invention will be described in detail with reference to the attached drawings.

[0024]

[0025] The BOP pipe connection system of the present invention comprises a plurality of shafts (100) formed in a circular trajectory and rotating by external force, with shaft threads (110) formed on the outer surface; roller screws (200) provided in plurality on the outer surface of the shaft (100), with roller threads (210) formed on each outer surface to be gear-coupled with the shaft threads (110); nuts (300) provided in contact with different roller screws (200), having nut threads (310) along the inner surface to be gear-coupled with the roller threads (210), and moving in the up-and-down direction as the shaft (100) rotates; and a moving part (400) having a hollow cylindrical shape, connected to the nut (300), and moving in the up-and-down direction to press and fix the outer surface of the pipe (P).

[0026]

[0027] First, an axis (100) is provided. As shown in FIG. 4, the axis (100) can be formed in multiple circular trajectories. FIG. 4 shows 15 such axis, but the number and length are not limited.

[0028] At this time, each shaft (100) can be connected to a motor to directly receive power, and the capacity of the motor can be reduced, but it may be difficult to rotate the different shafts (100) simultaneously because it is difficult to synchronize control of the different motors.

[0029] A shaft thread (110) is formed on the outer surface of the shaft (100), and the shaft thread (110) is formed at a constant pitch.

[0030]

[0031] A plurality of roller screws (200) are formed on the outer surface of the shaft (100). Each roller screw (200) has a roller screw thread (210) formed on its outer surface to be gear-coupled with the shaft screw thread (110). Here, FIG. 6 shows that 11 roller screws (200) are provided, but the number is not limited. The number and length of the roller screws (200) in the direction of the shaft (100) are not limited, but it is preferable that they be shorter than the length of the shaft (100). Also, the roller screw threads (210) are formed at a constant pitch.

[0032]

[0033] A nut (300) is provided in contact with the roller screw (200). The nut (300) has a hollow cylindrical shape and has nut threads (310) to be geared with the roller screw threads (210) along the inner surface of a circular trajectory. Here, the length of the nut (300) is not limited in the direction of the axis (100), and the nut threads (310) are formed at a constant pitch.

[0034] As the shaft (100) rotates, the roller screw (200) transmits rotational force to the nut (300), causing the nut (300) to move up and down.

[0035]

[0036] A sensor (320) is further provided on the shaft (100). When a concentrated load occurs on a part of the roller screw (200), the roller screw (200) on which the load is concentrated is damaged among the different roller screws (200), causing the nut (300) to stop. At this time, the sensor (320) detects when the nut (300) does not move while the shaft (100) rotates, thereby allowing identification of the damaged roller screw (200) and nut (300) among the different roller screws (200) and nut (300).

[0037]

[0038] A moving part (400) is provided connected to the nut (300). The moving part (400) has a hollow cylindrical shape with a pipe (P) located inside, and the moving part (400) can move up and down together with the nut (300).

[0039] Specifically, as the moving part (400) moves downward together with the nut (300), it can press and fix the outer surface of the pipe (P) to which different pipes (P) are connected. More specifically, as the moving part (400) moves downward, it presses the fixing part (F), causing the fixing part (F) to press and fix the outer surface of the pipe (P). By applying the roller screw (200), the contact area is widened so that it can withstand explosions or the like.

[0040]

[0041] A U clamp (410) is further provided on the moving part (400). Specifically, the U clamp (410) is positioned on the outer surface of the moving part (400) to fix the moving part (400) and the nut (300), thereby fixing the moving part (400) so that it can move together with the nut (300).

[0042] Specifically, as shown in FIG. 8, grooves are formed on both sides of the nut (300) at positions corresponding to the U clamp (410), so that the U clamp (410) can fix the nut (300) so that it cannot rotate. Also, grooves are formed on the outer surface of the movable part (400) at positions corresponding to the U clamp (410), so that the U clamp (410) can be fitted onto the movable part (400) to fix the nut (300) to the movable part (400).

[0043] When a concentrated load occurs on a part of the roller screw (200), among the different roller screws (200), only the roller screw (200) where the load is concentrated is damaged, and a failure in which the nut (300) does not operate may frequently occur, and the roller screw (200) and the nut (300) can be easily replaced by separating only the U clamp (410) located on the faulty roller screw (200) and the nut (300).

[0044]

[0045] Hereinafter, another embodiment of the BOP pipe connection system according to the present invention will be described.

[0046]

[0047] First, an axis (100) is provided. As shown in FIG. 4, the axis (100) can be formed in multiple circular trajectories. FIG. 4 shows 15 such axis, but the number and length are not limited.

[0048] In addition, the shaft (100) rotates by an external force, and a motor may be connected to a rotating part (600) to be described below, so that the shaft (100) rotates as the gear (500) connected to the rotating part (600) rotates. At this time, it is possible to rotate different shafts (100) simultaneously, but there is a problem that the capacity of the motor increases.

[0049] A shaft thread (110) is formed on the outer surface of the shaft (100), and the shaft thread (110) is formed at a constant pitch.

[0050]

[0051] Additionally, a roller screw (200), a nut (300), a moving part (400), a sensor (320), and a U clamp (410) are provided, and since they are identical to the description above, a detailed description is omitted.

[0052]

[0053] A gear (500) is provided above the nut (300). The gear (500) is fixed to the shaft (100) and rotates together with the shaft (100). Additionally, gear threads (510) are formed on the outer surface of the gear (500).

[0054]

[0055] A rotating part (600) is provided in connection with the above gear (500). Specifically, it is positioned in external contact with different gears (500). The rotating part (600) has a hollow cylindrical shape, and a rotating screw thread (610) is formed on its inner surface to be gear-coupled with the gear screw thread (510).

[0056] Here, the rotating part (600) receives power and rotates, and can transmit rotational force to the gear (500).

[0057]

[0058] A clutch (120) is further provided on the shaft (100). The clutch (120) is located between the gear (500) and the roller screw (200). Specifically, if the roller screw (200) is damaged and the nut (300) does not operate, the clutch (120) located on the damaged roller screw (200) and the nut (300) is actuated to disconnect the connection between the shaft (100) located on the roller screw (200) and the nut (300) and the shaft (100) located on the gear (500), thereby preventing the damaged roller screw (200) and the nut (300) from operating further.

[0059] At this time, the operation of the clutch (120) can be controlled electronically.

[0060]

[0061] The operation of the BOP pipe connection system according to the present invention will be explained below.

[0062]

[0063] When the motor connected to the shaft (100) operates, the roller screw (200) rotates as the shaft (100) rotates and the nut (300) moves up and down.

[0064] At this time, as the moving part (400) moves downward together with the nut (300), the outer surface of the pipe (P) to which different pipes (P) are connected can be pressed and fixed. More specifically, as the moving part (400) moves downward, it presses the fixing part (F), causing the fixing part (F) to press and fix the outer surface of the pipe (P). By applying the roller screw (200), the contact area is widened so that it can withstand explosions, etc.

[0065]

[0066] And, if the sensor (320) does not detect movement of the nut (300), it is recognized that the nut (300) is not rotating due to a failure of the roller screw (200), and the clutch (120) located on the failed roller screw (200) and the nut (300) is actuated. The connection between the shaft (100) located on the roller screw (200) and the nut (300) and the shaft (100) located on the gear (500) is cut off so that the damaged roller screw (200) and the nut (300) are no longer actuated.

[0067] In the present invention, since the roller screw (200) and the nut (300) are formed in multiple numbers on the outer surface of the moving part (400), the entire system can operate and the moving part (400) can move in the up and down direction even if some parts fail, so there is no need to repair it every time it fails, thereby reducing costs.

[0068]

[0069] And when repairing, if the U clamp (410) is removed from the moving part (400), the roller screw (200) and the nut (300) come out of the moving part (400), making repair easy.

[0070]

[0071] Hereinafter, the operation of another embodiment of the BOP pipe connection system according to the present invention will be described.

[0072]

[0073] When the motor connected to the rotating part (600) operates, the rotating part (600) rotates, and the gear (500) transmits rotational force to the shaft (100), causing the shaft (100) to rotate. As the shaft (100) rotates, the roller screw (200) rotates and the nut (300) moves up and down.

[0074] At this time, as the moving part (400) moves downward together with the nut (300), the outer surface of the pipe (P) to which different pipes (P) are connected can be pressed and fixed. More specifically, as the moving part (400) moves downward, it presses the fixing part (F), causing the fixing part (F) to press and fix the outer surface of the pipe (P). By applying the roller screw (200), the contact area is widened so that it can withstand explosions, etc.

[0075]

[0076] The following description regarding the detection and repair of malfunctions is identical to the explanation above, so a detailed explanation is omitted.

[0077]

[0078] As such, those skilled in the art to which the present invention pertains will understand that the technical configuration of the present invention described above can be implemented in other specific forms without altering the technical concept or essential features of the present invention.

[0079] Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting, and the scope of the invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the invention.

Claims

1. A shaft formed in multiple circular trajectories that rotates by an external force and has axial screw threads formed on its outer surface; A roller screw provided in multiple numbers on the outer surface of the shaft, with roller screw threads formed on each outer surface to engage with the shaft screw threads and gear; A nut provided in external contact with the above-mentioned different roller screws, having nut threads along its inner surface to be gear-coupled with the roller screw threads, and moving in the up-and-down direction as the shaft rotates; A BOP pipe connection system characterized by including a movable part having a hollow cylindrical shape, connected to the nut, which moves in an up-and-down direction and presses and fixes the outer surface of the pipe.

2. In Paragraph 1, A gear located above the nut, fixed to the shaft and rotating, with gear threads formed on its outer surface; A BOP pipe connection system characterized by including a rotating part that rotates by an external force and is provided in external contact with different gears, and has a hollow cylindrical shape with a rotating screw thread formed along its inner surface to engage with the gear screw thread.

3. In Paragraph 1, A BOP pipe connection system characterized by having a U clamp provided on the moving part to secure the moving part and the nut.

4. In Paragraph 2, A BOP pipe connection system characterized by having a sensor for detecting the movement of the nut provided on the shaft.

5. In Paragraph 2, A BOP pipe connection system characterized by having a clutch provided between the gear and the roller screw on the shaft.

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