buoy

Abstract

A buoy comprising a buoyancy device having an outer surface, the outer surface having a first end, a second end, and an elongated portion. The elongated portion extends from the first end to the second end. The buoyancy device is shaped and configured to connect with a pipeline. The elongated portion of the outer surface has a recessed portion extending from the first end to the second end. The buoyancy device is connected to the pipeline, and the recessed portion has a shape complementary to an outer radius of the pipeline.

Description

[0001] This U.S. patent application is a partial continuation-in-process of U.S. Patent No. 17 / 668099, filed February 9, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure generally relates to a mud transport riser assembly. More specifically, this disclosure relates to a buoyancy device for a mud transport riser assembly, wherein the buoyancy device has an outer surface portion that is complementary to the outer radius of the mud pipe, and the buoyancy device is connected to the mud pipe. Background Technology

[0003] Mud pipes (also known as risers) are typically used in large volumes of liquids and extend from the deeper part of the liquid above the surface. In some applications, the pipe or riser needs additional buoyancy to keep the upper end of the mud pipe close to or above the liquid surface. Summary of the Invention

[0004] One object of this disclosure is to provide a mud pipe having one or more buoyancy devices, the buoyancy devices being easily installed on the mud pipe.

[0005] In view of the state of the prior art, one aspect of this disclosure is to provide a mud conveying riser assembly with a buoyancy device having an outer surface having a first end, a second end, and an elongated portion. The elongated portion extends from the first end to the second end. The buoyancy device is shaped and is intended for connection to a mud pipe. The elongated portion of the outer surface has a recessed portion extending from the first end to the second end. The buoyancy device is connected to the mud pipe, and the recessed portion has a shape complementary to the outer radius of the mud pipe. Attached Figure Description

[0006] Now refer to the accompanying drawings that form part of this original disclosure:

[0007] Figure 1 This is a schematic diagram of a mud transport lift assembly according to a first embodiment, which is used with a large ship to bring slurry from a liquid body to a liquid surface through a mud pipe, the mud pipe including a plurality of buoyancy devices connected to and surrounding the mud pipe;

[0008] Figure 2 yes Figure 1 The enlarged portion shows a mud pipe according to the first embodiment, wherein a plurality of buoyancy devices are attached to the mud pipe.

[0009] Figure 3 This is a top view of a mud pipe and a plurality of buoyancy devices connected thereto by a pair of straps, according to the first embodiment;

[0010] Figure 4 This is an exploded view of removing multiple buoyancy devices and a pair of straps from the pipe according to the first embodiment;

[0011] Figure 5 This is a perspective view of a buoyancy device according to a first embodiment, showing an outer surface having a first end, a second end, and an elongated portion, the elongated portion including a recessed portion and a pair of protrusions within the recessed portion;

[0012] Figure 6 yes Figure 5 The first side view of the buoyancy device shown illustrates the outer surface, first end, second end, elongated portion, recessed portion, and a pair of protrusions within the recessed portion according to the first embodiment.

[0013] Figure 7 yes Figure 5 The second side view of the buoyancy device shown illustrates the outer surface, first end, second end, and first and second belt receiving channels according to the first embodiment.

[0014] Figure 8 yes Figure 5 The end view of the buoyancy device shown illustrates a first end, a recessed portion, and a protrusion within the recessed portion according to the first embodiment;

[0015] Figure 9 yes Figure 8 The enlarged side view of the buoyancy device shown only shows the recessed portion and a protrusion within the recessed portion according to the first embodiment;

[0016] Figure 10 It is along Figure 7 The cross-sectional view of the buoyancy device taken by line 10-10 shows the first and second belt receiving channels extending through the buoyancy device according to the first embodiment;

[0017] Figure 11 It is along Figure 6 The cross-sectional view of the buoyancy device taken by line 11-11 in the first embodiment shows the first and second belt receiving channels, the recessed portion, and a pair of protrusions within the recessed portion according to the first embodiment;

[0018] Figure 12 It is along Figure 7 The cross-sectional view of the buoyancy device taken by line 12-12 shows the second belt receiving channel extending through the buoyancy device according to the first embodiment;

[0019] Figure 13 This is a first side view of the buoyancy device according to the second embodiment, showing the outer surface, the first end, the second end, the elongated portion, the recessed portion, and a pair of protrusions within the recessed portion;

[0020] Figure 14yes Figure 13 The second side view of the buoyancy device shown illustrates the outer surface, first end, second end, and first and second belt receiving channels according to the second embodiment.

[0021] Figure 15 It is along Figure 13 The cross-sectional view of the buoyancy device taken by line 15-15 in the second embodiment shows the buoyancy device, the first and second belt receiving channels, the recessed portion, and the hollow interior of a pair of protrusions within the recessed portion.

[0022] Figure 16 It is along Figure 14 A cross-sectional view of the buoyancy device taken from line 16-16 shows the hollow interior of the buoyancy device according to the second embodiment and the second belt receiving channel extending through the buoyancy device;

[0023] Figure 17 This is a perspective view of a buoyancy device with an overall smooth surface according to the third embodiment;

[0024] Figure 18 This is an end view of a buoyancy device with an overall smooth surface according to the third embodiment;

[0025] Figure 19 This is a side view of a buoyancy device with an overall smooth surface according to the third embodiment;

[0026] Figure 20 This is a side view of a mud pipe and a plurality of buoyancy devices connected to the mud pipe according to the fourth embodiment;

[0027] Figure 21 According to the fourth embodiment Figure 20 A perspective view of one of the buoyancy devices shown, revealing a pair of connecting protrusions at its first end and a pair of recesses at its second end;

[0028] Figure 22 yes Figure 21 The side view of the buoyancy device shown illustrates a pair of connecting protrusions and a pair of recesses according to the fourth embodiment;

[0029] Figure 23 yes Figure 21 and 21 The first end view of the buoyancy device shown illustrates the connecting protrusion according to the fourth embodiment;

[0030] Figure 24 yes Figure 20-23 The second end view of the buoyancy device shown illustrates the recess according to the fourth embodiment;

[0031] Figure 25This is an end view of a mud pipe according to the fifth embodiment, wherein four buoyancy devices are fixed to the mud pipe;

[0032] Figure 26 This is an end view of a mud pipe according to the sixth embodiment, wherein five buoyancy devices are fixed to the mud pipe;

[0033] Figure 27 This is an end view of a mud pipe according to the seventh embodiment, wherein five buoyancy devices are fixed to the mud pipe;

[0034] Figure 28 This is an end view of the mud pipe according to the eighth embodiment, wherein six buoyancy devices are fixed to the mud pipe;

[0035] Figure 29 This is a perspective view of the buoyancy device according to the ninth embodiment;

[0036] Figure 30 According to the ninth embodiment Figure 29 Top view of the buoyancy device shown;

[0037] Figure 31 According to the ninth embodiment Figures 29-30 Side view of the buoyancy device shown;

[0038] Figure 32 According to the ninth embodiment along Figure 31 A cross-sectional view of the buoyancy device taken from line 32-32 in the diagram;

[0039] Figure 33 According to the ninth embodiment along Figure 31 Another cross-sectional view of the buoyancy device taken from line 33-33 in the diagram;

[0040] Figure 34 According to the ninth embodiment, along Figure 31 Another cross-sectional view of the buoyancy device taken from line 34-34 in the middle;

[0041] Figure 35 This is a perspective view of a mud delivery riser assembly according to a ninth embodiment, the assembly including seven buoyancy devices placed around the mud pipe before being connected to it.

[0042] Figure 36 This is another perspective view of the mud conveying riser assembly according to the ninth embodiment, showing seven buoyancy devices attached to and surrounding the mud pipe.

[0043] Figure 37 This is an end view of the mud transport riser assembly, showing seven buoyancy devices attached to and surrounding the mud pipe, and showing the small gaps between adjacent buoyancy devices according to the ninth embodiment.

[0044] Figure 38 This is an end view of the mud transport riser assembly, showing seven buoyancy devices attached to and surrounding the mud pipe, which is slightly larger than... Figure 36 and 37 The mud pipe shown is, according to the ninth embodiment, Figure 38 The gap in the middle is slightly larger than Figure 37 The gap in;

[0045] Figure 39 This is another perspective view of the mud transport riser assembly, showing six floating devices attached to and surrounding the mud pipe. According to the ninth embodiment, the diameter (and radius) of the mud pipe is less than... Figure 37 The mud pipe shown;

[0046] Figure 40 yes Figure 39 The end view of the mud transport riser assembly shown shows six buoyancy devices attached to and surrounding the mud pipe, and shows the small gap between adjacent buoyancy devices according to the ninth embodiment.

[0047] Figure 41 This is an end view of the mud transport riser assembly, showing six buoyancy devices attached to and surrounding the mud pipe, which is slightly larger than... Figure 40 The mud pipes shown create gaps between adjacent buoyancy devices, according to the ninth embodiment. Figure 41 The gap in the middle is slightly larger than Figure 4 The gap shown;

[0048] Figure 42 This is another perspective view of the mud transport riser assembly, showing five buoyancy devices attached to and surrounding the mud pipe. According to the ninth embodiment, the diameter (and radius) of the mud pipe is less than... Figure 40 The mud pipe shown;

[0049] Figure 43 yes Figure 42 The end view of the mud transport riser assembly shown shows five buoyancy devices attached to and surrounding the mud pipe, and shows the small gap between adjacent buoyancy devices according to the ninth embodiment.

[0050] Figure 44 This is an end view of the mud transport riser assembly, showing five buoyancy devices attached to and surrounding the mud pipe, which is slightly larger than... Figure 43 The mud pipes shown are designed to create gaps between adjacent buoyancy devices, according to the ninth embodiment. Figure 44 The gap in the middle is slightly larger than Figure 44 The gap shown;

[0051] Figure 45 This is another perspective view of the mud transport riser assembly, showing four floating devices strapped to and surrounding the mud pipe, which, according to the ninth embodiment, has a diameter (and radius) smaller than [specified value]. Figure 43 The mud pipe shown;

[0052] Figure 46 yes Figure 45 The end view of the mud transport riser assembly shown shows four buoyancy devices attached to and surrounding the mud pipe, and the gap between adjacent buoyancy devices according to the ninth embodiment.

[0053] Figure 47 This is an end view of the mud transport riser assembly, showing four buoyancy devices attached to and surrounding the mud pipe, which is slightly larger than... Figure 46 The mud pipes shown create gaps between adjacent buoyancy devices, according to the ninth embodiment. Figure 47 The gap in the middle is slightly larger than Figure 47 The gap shown;

[0054] Figure 48 This is a perspective view of a mud transport riser assembly, showing three floating devices attached to and surrounding the mud pipe. According to the ninth embodiment, the diameter (and radius) of the mud pipe is less than... Figure 46 The mud pipe shown;

[0055] Figure 49 yes Figure 48 The end view of the mud transport riser assembly shown shows three buoyancy devices attached to and surrounding the mud pipe, and the gap between adjacent buoyancy devices according to the ninth embodiment.

[0056] Figure 50 This is a perspective view of the mud transport riser assembly, showing two buoyancy devices attached to opposite sides of the mud pipe. According to the ninth embodiment, the diameter (and radius) of the mud pipe is less than... Figure 49 The mud pipe shown;

[0057] Figure 51 yes Figure 50 The end view of the mud conveying riser assembly shown shows two buoyancy devices attached to and surrounding the mud pipe, and a large gap between adjacent buoyancy devices according to the ninth embodiment.

[0058] Figure 52 This is a perspective view of the mud transport riser assembly, showing a buoyancy device fixed to the mud pipe array. According to the ninth embodiment, the diameter (and radius) of the mud pipes are both smaller than... Figure 51 The mud pipe shown;

[0059] Figure 53 yes Figure 52 The end view of the mud conveying riser assembly shown illustrates a buoyancy device fixed to the mud pipe according to the ninth embodiment.

[0060] Figure 54 This is an end view of a pallet or cargo ship according to the ninth embodiment, on which multiple rows of buoyancy devices for transportation are stacked, each row of buoyancy devices including alternating upper and lower buoyancy devices to effectively utilize the space on the pallet or cargo ship.

[0061] Figure 55 This is a perspective view of a pallet or cargo carrier according to the ninth embodiment, on which multiple rows of buoyancy devices for transportation are stacked.

[0062] Figure 56 This is a side view of the buoyancy device according to the tenth embodiment;

[0063] Figure 57 According to the tenth embodiment along Figure 56 A cross-sectional view of the buoyancy device taken from line 57-57 in the diagram;

[0064] Figure 58 According to the tenth embodiment, along Figure 56 Another cross-sectional view of the buoyancy device taken from line 58-58 in the diagram;

[0065] Figure 59 According to the tenth embodiment, along Figure 56 Another cross-sectional view of the buoyancy device taken from line 59-59 in the diagram;

[0066] Figure 60 This is a perspective view of the buoyancy device according to the eleventh embodiment, showing the dimensions of the recessed portion for receiving light or a beacon on its respective surfaces;

[0067] Figure 61 yes Figure 60 The top view of the buoyancy device shown illustrates the recessed portion according to the ninth embodiment;

[0068] Figure 62 According to the ninth embodiment Figures 60-61 Side view of the buoyancy device shown;

[0069] Figure 63 According to the ninth embodiment along Figure 62 Cross-sectional view of the buoyancy device taken from line 63-63; and

[0070] Figure 64 This is an end view of the buoyancy device according to the ninth embodiment. Detailed Implementation

[0071] Selected embodiments will now be explained with reference to the accompanying drawings. It will be apparent to those skilled in the art that the following description of the embodiments is merely illustrative and not intended to limit the invention as defined by the appended claims and their equivalents.

[0072] First refer to Figure 1 and Figure 2 According to the first embodiment, a mud transport riser assembly (buoy) 10 with at least one buoyancy device 12 is shown, which is used to connect to a mud pipe (or conduit) P (also referred to as a riser).

[0073] The mud conveying riser assembly 10 can be used in any of a variety of applications where mud is pumped from below the surface S of a liquid L or mud mixture to above the surface S of the liquid L or mud mixture. Figure 1 In one example shown, the mud delivery riser assembly 10 is used in conjunction with a floating vessel or ship B, which is situated on the surface of a body of water containing liquid L (e.g., a river or canal undergoing dredging). Mud from the bottom of the river or canal is pumped through pipe 14 to ship B, and then further pumped along the river or canal to a shoreline (not shown). The outer surface of pipe 14 (also referred to as a mud pipe and riser) has at least a portion of a cylindrical shape. The outer surface of pipe 14 also defines a pipe radius R1, such as... Figure 3 As shown.

[0074] The upper part of the pipe 14 is preferably held near the surface S of the liquid L by one or more buoyancy devices 12, such as Figure 1 As shown. Figure 2-4 As shown, multiple buoyancy devices 12 are connected to pipe 14 via straps 16 and 18, in a manner further described below after the description of one of the buoyancy devices.

[0075] exist Figure 5-12 In the first embodiment shown and described below, one or more buoyancy devices 12 can be used with a single pipe 14. Each of the plurality of buoyancy devices 12 is identical to one another. Therefore, the description of one buoyancy device 12 applies to... Figure 1-4 All of the multiple buoyancy devices 12 shown.

[0076] like Figure 5-12 As shown, the buoyancy device 12 has an outer surface 20, which has a first end 22, a second end 24, and an elongated portion 26. The elongated portion 26 extends from the first end 22 to the second end 24. When viewed from a distance, the elongated portion 26 has an overall shape resembling a cylinder. The cylindrical shape is interrupted by a recessed portion 28. In the first embodiment, as... Figure 8 and 10 As shown, the elongated portion 26 is similar to a cylinder, and the outer surface 20 has an octagonal shape comprising eight parts, including seven planar portions 30. In the first embodiment, the last of the eight portions defining the outer surface 20 is a recessed portion 28.

[0077] The first end 22 and the second end 24 of the outer surface 20 of the buoyancy device 12 have an overall hemispherical shape when viewed from a distance. However, like the elongated portion 26, each of the first and second ends 22 and 24 includes eight separate sections that curve inward to define the overall hemispherical shape.

[0078] The recessed portion 28 defines a shape complementary to the outer radius R1 (pipe radius) of the pipe 14. Therefore, when the recessed portion 28 is fixed to the outer surface of the pipe 14, the buoyancy device 12 can be attached to the pipe 14 without rotating relative to the pipe 14.

[0079] like Figure 5 and Figure 6 As shown, the buoyancy device 12 has a total length L1 measured along the longitudinal direction D1 of the buoyancy device 12. The recessed portion 28 includes at least one protrusion 32, preferably two protrusions 32, which are cut and shaped to contact the pipe 14, thereby preventing longitudinal movement of both when the buoyancy device 12 is strapped to the pipe 14. Figure 6 As shown, the two protrusions 32 extend in a direction perpendicular to the longitudinal direction D1 of the buoyancy device 12.

[0080] like Figure 10-12 As shown, in the first embodiment, the buoyancy device 12 is not hollow. Instead, the buoyancy device 12 is filled with a foam material, such as expandable polyurethane, polystyrene, or other lightweight material that ensures the buoyancy of the buoyancy device 12. The outer surface 20 of the buoyancy device 12 is defined by the outer wall of the buoyancy device 12. The outer wall can be formed of a metallic material or any of a variety of plastic or polymer materials suitable for use in marine environments.

[0081] like Figure 4-5 As shown in Figures 7-8 and 10-12, the buoyancy device 12 includes a pair of first tape receiving channels 40 and a pair of second tape receiving channels 42. The first tape receiving channels 40 extend between planar portions 30 located near the side of the buoyancy device 12 opposite to the recessed portion 28. The first tape receiving channels 40 are parallel to each other and parallel to the protrusion 32.

[0082] like Figure 8 and Figure 10 As shown in the cross-section, a pair of second tape receiving channels 42 extend through the buoyancy device 12 and are centered relative to it. The second tape receiving channels 42 are parallel to and spaced apart from the first tape receiving channel 40.

[0083] like Figure 3 and Figure 4 As shown, straps 16 and 18 are mounted on the buoyancy devices 12 such that strap 16 extends through one of the first strap receiving channels 40 in each buoyancy device 12, while strap 18 extends through the other first strap receiving channel 40 in each buoyancy device 12. The multiple buoyancy devices 12 are secured to the conduit 14 such that straps 16 and 18 press the protrusion 32 against the outer surface of the conduit 14. Straps 16 and 18 are then tightened. Once straps 16 and 18 are tightened, the protrusion 32 and the conduit 14 come into contact with each other to ensure that the multiple buoyancy devices 12 do not move relative to the conduit 14 in the longitudinal direction D1. Furthermore, since the conduit 14 extends into each recess 28 of the buoyancy device 12, straps 16 and 18 prevent the buoyancy devices 12 from rotating relative to each other. Similarly, straps 16 and 18, extending through the first strap receiving channels 40, are further wound around all the buoyancy devices 12, securing the buoyancy devices 12 together and in place around the conduit 14.

[0084] The second tape receiving channel 42 can be used in applications that use a smaller number of buoyancy devices 12, such as... Figure 25-28 The embodiments shown are illustrated and described in more detail below.

[0085] Second Embodiment

[0086] Now for reference Figure 13-16 The buoyancy device 112 according to the second embodiment will now be explained. Given the similarity between the first and second embodiments, components identical to those in the first embodiment in the second embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the second embodiment may be omitted.

[0087] Except for having a hollow interior 150, the buoyancy device 112 (from the outside) is substantially the same as the buoyancy device 12 of the first embodiment. More specifically, the buoyancy device 112 includes an outer surface 20 having a first end 22, a second end 24, an elongated portion 26, a recessed portion 28, and a protrusion 32. The buoyancy device 112 also includes a first tape receiving channel 40 and a second tape receiving channel 42, as described above with respect to the first embodiment. In the first embodiment, the buoyancy device 12 is not hollow. In the second embodiment, the buoyancy device 112 is hollow.

[0088] Third Embodiment

[0089] Now for reference Figure 17-19The buoyancy device 212 according to the third embodiment will now be explained. Given the similarity between the first and third embodiments, components identical to those in the first embodiment in the third embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the third embodiment may be omitted.

[0090] The buoyancy device 212 is very similar to the buoyancy device 12 of the first embodiment, except that the buoyancy device 212 has a smooth outer surface 220. The buoyancy device 212 includes an outer surface 220 having a first end 222, a second end 224, and an elongated portion 226. The size and shape of the outer surface 220 are similar to the outer surface 20 of the first embodiment, except that it includes a recessed portion 28 and a protrusion 32; the outer surface 220 is smooth and continuous. The recessed portion 28 and the protrusion 32 are as described in the first embodiment. Similarly, the first end 222 has a similar overall shape to the first end 22, but is smooth. Likewise, the second end 224 has a similar overall shape to the second end 22 of the first embodiment, but is smooth.

[0091] The buoyancy device 212 also includes a first tape receiving channel 40 and a second tape receiving channel 42.

[0092] Fourth embodiment

[0093] Now for reference Figure 20-24 The buoyancy device 312 according to the fourth embodiment will now be explained. Given the similarity between the first and fourth embodiments, components identical to those in the first embodiment in the fourth embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the fourth embodiment may be omitted.

[0094] The buoyancy device 312 of the fourth embodiment has some of the same features as that of the first embodiment. However, in the fourth embodiment, the buoyancy device 312 has an outer surface 320, which includes a first end 322, a second end 324, and an elongated portion 326. The buoyancy device 312 also includes the recessed portion 28 and the protrusion 32 of the first embodiment. The buoyancy device 312 also includes at least one first tape receiving channel 40 and at least one second tape receiving channel 42, as described in the first embodiment.

[0095] The first end 322 includes a pair of connecting protrusions 360 extending from the elongated portion 326. The second end 324 includes a pair of recesses 362, the shape and size of which are adapted to receive the pair of connecting protrusions 360. Figure 20As shown, the second end 324 of the buoyancy device 312 can be connected to the first end 322 of the second buoyancy device 312. This connection is achieved by inserting a pair of connecting protrusions 360 from the second buoyancy device 312 into a pair of recesses 362 at the second end of the first buoyancy device. The strap 16 is inserted into the second strap receiving channel 42, and the strap 18 is fitted into the opening of the protrusion 360 and then into the opening of the recess 362 (corresponding to another strap receiving channel), thus securing the two buoyancy devices 312 together.

[0096] Therefore, multiple buoyancy devices 312 can be connected around the outer surface of the pipe 14, and at least pairs of buoyancy devices 312 can be connected end-to-end to each other. It should be understood that, depending on the length of the pipe 14 and the buoyancy requirements of the slurry conveying riser assembly 10, many buoyancy devices 312 can be connected end-to-end to each other.

[0097] Fifth embodiment

[0098] Now for reference Figure 25 The mud conveying riser assembly according to the fifth embodiment will now be explained. Given the similarity between the first and fifth embodiments, components identical to those in the first embodiment in the fifth embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the fifth embodiment may be omitted.

[0099] In the fifth embodiment, multiple buoyancy devices 12 are installed around the pipe 14. In some cases, the number of buoyancy devices 12 required can be determined based on the diameter of the pipe 14 and the size of the buoyancy devices 12. In the fifth embodiment, as... Figure 25 As shown, four floating devices 12 are tied around the pipe 14, and the strap 16 is installed in the strap receiving channel 42.

[0100] Sixth Embodiment

[0101] Now for reference Figure 26 The mud conveying riser assembly according to the sixth embodiment will now be explained. Given the similarity between the first and sixth embodiments, components identical to those in the first embodiment in the sixth embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the sixth embodiment may be omitted.

[0102] In the sixth embodiment, multiple buoyancy devices 12 are installed around the pipe 14. In the sixth embodiment, as... Figure 26 As shown, five buoyancy devices 12 are tied to pipe 14, and belt 16 is installed in belt receiving channel 42.

[0103] Seventh Embodiment

[0104] Now for reference Figure 27 The mud conveying riser assembly according to the seventh embodiment will now be explained. Given the similarity between the first and seventh embodiments, components identical to those in the first embodiment in the seventh embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the seventh embodiment may be omitted.

[0105] In the seventh embodiment, the relative diameter of the pipe 14 is larger than that in the sixth embodiment. Multiple buoyancy devices 12 are installed around the pipe 14. In the seventh embodiment, five buoyancy devices 12 are again secured to the pipe 14, and a strap 16 is installed in the strap receiving channel 42, as shown. Figure 26 As shown. Alternatively, tape 16 can also be installed in tape receiving channel 40 ( Figure 27 (Not shown in the image).

[0106] Eighth embodiment

[0107] Now for reference Figure 28 The mud conveying riser assembly according to the eighth embodiment will now be explained. Given the similarity between the first and eighth embodiments, components identical to those in the first embodiment in the eighth embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the eighth embodiment may be omitted.

[0108] In the eighth embodiment, the relative diameter of the pipe 14 is larger than that in the sixth and seventh embodiments. Multiple buoyancy devices 12 are installed around the pipe 14. In the eighth embodiment, six buoyancy devices 12 are strapped to the pipe 14, and a strap 16 is installed in the strap receiving channel 40, as shown... Figure 28 As shown.

[0109] Ninth Embodiment

[0110] Now for reference Figures 29-34 The buoyancy device 412 according to the ninth embodiment will now be explained. Given the similarity between the first and ninth embodiments, components identical to those in the first embodiment in the ninth embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the ninth embodiment may be omitted.

[0111] The buoyancy device 412 in the ninth embodiment has an outer surface 420, which has a first end 422, a second end 424, and an extension portion 426. For example... Figure 29As shown, each of the first end 422 and the second end 424 of the outer surface 420 of the buoyancy device 412 has a gradually tapering semi-conical shape.

[0112] The elongated portion 426 extends from the first end 422 to the second end 424. For example... Figure 32 , 33 As shown in Figure 34, the overall shape of the elongated portion 426 resembles a wedge or a piece of pie bitten out from its inner end, whether viewed from either end or in cross-section. In other words, from a perspective view, the first end 422 and the second end 424 of the outer surface 420 of the buoyancy device 412 have a wedge-shaped shape. Figures 32-34 As shown, the internal region of the buoyancy device 412 defines a recessed portion 428, which is curved when viewed from either end. Figure 29 , 30 From the perspective view, top view and side view of 31 respectively, the first end 422 and the second end 424 of the outer surface 420 are also gradually tapering surfaces.

[0113] A recessed portion 428 extends from a first end 422 to a second end 424. The recessed portion 428 has an edge 428a whose defined shape is complementary to the outer radius of the mud pipe 14. A buoyancy device 428 is connected to the mud pipe 14, as described below.

[0114] The outer surface 420 of the elongated portion 426 has opposing side surface portions 440, a convex portion 442, and a recessed portion 428. For example... Figure 29 and 32 As shown in Figure -34, the side surface portions 440 are generally flat or planar. Each side surface portion 440 extends from a corresponding edge 428a of the recessed portion 428 to a corresponding edge of the convex portion 442. The convex portion 442 extends parallel to the recessed portion 428. Figure 33 As shown, the side surface portions 440 are offset from each other at an angle, forming an acute angle α between them. The acute angle α can have any value among various values, depending on the ideal shape and purpose of the buoyancy device 412. In the described embodiment, the acute angle α is between 45 and 55 degrees, but is preferably about 50 (±1) degrees.

[0115] like Figures 37-38 As shown in 40-41, 43-44 and 46-47, the buoyancy device 412 is shaped and used for connection with the mud pipe 14, and the edge 428a of the recessed portion 428 contacts the mud pipe 14, as described further below.

[0116] The recessed portion 428 defines a partially cylindrical or curved shape that complements or is smaller than the pipe 14. Figure 1 and 3The outer radius R1 (pipe radius) of the buoyancy device 12 is used. Therefore, when the buoyancy device 412 is attached to the outer surface of the mud pipe 14, the edge 428a of the recessed portion 428 of the buoyancy device 12 can press against the pipe 14 (for larger pipes 14), helping to prevent rotation along or movement relative to the pipe 14. For smaller diameter pipes, tightening the strap S1 (described below) is sufficient to secure the buoyancy device 412 to the pipe 14, as further described below.

[0117] The convex portion 442 extends from the first end 422 to the second end 424, but is interrupted by at least one strap receiving groove 450a. Preferably, the convex portion 442 includes three strap receiving grooves 450a, 450b, and 450c. Each strap receiving groove 450a, 450b, and 450c extends along direction D1 or perpendicular to the length direction DL of the convex portion 442 and the buoyancy device 412 and parallel to direction D1. Figure 32 As shown, the bottom surface of each tape receiving groove 450a, 450b, and 450c has an arcuate shape, the radius R2 of which is smaller than the radius R3 defined by the curvature of the convex portion 442. The tape receiving grooves 450a and 450c are identical in shape and size. Figure 29 , 30 As shown in Figures 31 and 32, the tape receiving groove 450b is the same as tape receiving grooves 450a and 450b, except that the central region of the tape receiving groove 450b includes a bridge-shaped portion 450d, which covers a small portion of the tape receiving groove 450b and forms a channel within the tape receiving groove 450b. When the tape S1 is inserted into the tape receiving groove 450b, the tape S1 is more easily secured within the tape receiving groove 450b by the bridge-shaped portion 450d, thereby connecting the buoyancy device 12 to the pipe 14.

[0118] like Figures 29-31 As shown, each of the first end 422 and the second end 424 includes an arcuate planar portion 456. The arcuate planar portion 456 is provided for the buoyancy device 412 to be installed end-to-end along the length direction DL of the pipe 14.

[0119] like Figures 32-34 As shown, the buoyancy device 412 may have a hollow interior H, and the buoyancy device 412 may be made of any of a variety of materials, such as metal, metal alloy, plastic or polymer materials and / or reinforced fiber materials (e.g., glass fiber), or a combination thereof.

[0120] As shown below Figure 35-53As shown in the installation configuration, the buoyancy device 412 can be installed on mud pipes of various sizes with various diameters (and radii). For example, for a large-diameter mud pipe 14, seven (7) or more buoyancy devices 412 can be bundled around the mud pipe 14 (also referred to as pipe P). For a smaller-diameter mud pipe, one, two, three, four, five, or six buoyancy devices 412 can be bundled around the mud pipe, as will be described in detail below.

[0121] like Figure 35 As shown, the mud pipe 14 has a cylindrical outer surface, and the pipe radius is defined as R1. Multiple buoyancy devices 412 can be placed around the pipe 14 for subsequent installation on it. In the described embodiment, the pipe radius R1 is such that seven buoyancy devices 412 can be arranged around the pipe 14, with slight spacing between them. Figures 36-37 In this configuration, the strap S1 has been installed into the grooves 250a, 250b, and 250c and tightened to secure the buoyancy device 412 to the pipe 14 (also referred to as pipe P1). Figure 37 As shown, once fastened to pipe P1, the seven buoyancy devices 412 are slightly spaced apart from each other in the circumferential direction, forming multiple gaps G between them.

[0122] like Figure 37 As shown, the recessed portion 428 of the elongated portion 426 of the outer surface 420 of each buoyancy device 412 is such that the corresponding portion of the pipe P1 extends into the recessed portion 428.

[0123] exist Figure 38 In this configuration, multiple buoyancy devices 412 are fixed to the outer surface of a pipe P2, the outer radius (diameter) of which is slightly larger than the radius of pipe P1. Therefore, the gap G2 is greater than... Figure 37 The buoyancy device 412 assembly shown has a gap G. Furthermore, along gaps G and G2, adjacent surfaces of the buoyancy device 412 are approximately parallel to each other.

[0124] exist Figure 39 and 40 In this configuration, multiple buoyancy devices 412 (six buoyancy devices 412) are fixed to the outer surface of a pipe P3, the outer radius (diameter) of which is smaller than the radii of pipes P1 and P2. Therefore, Figure 40 The gap G3 in the middle and Figure 37 and 38 The gaps G and G2 are different, and the adjacent surfaces of the buoyancy device 412 along the gap G3 are not parallel to each other. More precisely, as Figure 40 As shown, the gap G3 has a triangular shape.

[0125] exist Figure 41In this configuration, multiple buoyancy devices 412 are fixed to the outer surface of a pipe P4, the outer radius (diameter) of which is slightly larger than the radius of pipe P3. Therefore, Figure 41 The gap G4 in the middle and Figure 39 and 40 The gaps G, G2 and G3 are different, and the buoyancy device 412 is almost parallel to each other along the adjacent surfaces of the gap G3.

[0126] exist Figure 42 and 43 In this configuration, multiple buoyancy devices 412 (five buoyancy devices 412) are fixed to the outer surface of a pipe P5, the outer radius (diameter) of which is smaller than the radii of pipes P3 and P4. Therefore, Figure 43 The gap G5 in the middle is different from the other gaps, and the adjacent surfaces of the buoyancy device 412 along the gap G5 are not parallel to each other. More precisely, as Figure 43 As shown, the gap G5 has a triangular shape.

[0127] exist Figure 44 In this configuration, multiple buoyancy devices 412 (five buoyancy devices 412) are fixed to the outer surface of a pipe P4, the outer radius (diameter) of which is slightly larger than the radius of pipe P3. Therefore, Figure 41 The gap G4 in the middle and Figure 39 and 40 The gaps G, G2 and G3 are different, and the buoyancy device 412 is almost parallel to each other along the adjacent surfaces of the gap G3.

[0128] exist Figure 45 and 46 In this structure, multiple buoyancy devices 412 (four buoyancy devices 412) are fixed to the outer surface of a pipe P7, the outer radius (diameter) of which is smaller than the radii of pipes P5 and P6. A strap S1 secures the buoyancy devices 412 to each other and surrounds the pipe P7. Therefore, Figure 46 The gap G7 in the middle is different in size from the other gaps because the outermost part of the adjacent surface of the buoyancy device 412 along the gap G7 is larger than that of the other gaps. Figure 36-44 The gaps in the middle are further apart and are not parallel to each other. More precisely, gap G7 has a triangular shape, such as... Figure 46 As shown.

[0129] exist Figure 47 In this structure, multiple buoyancy devices 412 (four buoyancy devices 412) are fixed to the outer surface of pipe P8, the outer radius (diameter) of which is slightly larger than the radius of pipe P7. Therefore, Figure 47 The gap G8 is different from gaps G4, G5 and G6.

[0130] exist Figure 48 and 49In this configuration, multiple buoyancy devices 412 (three buoyancy devices 412) are fixed to the outer surface of a pipe P9, the outer radius (diameter) of which is smaller than the radii of pipes P7 and P8. A strap S1 secures the buoyancy devices 412 to each other and surrounds the pipe P9. Therefore, Figure 49 The gap G9 in the middle is different in size from the other gaps. The outermost part of the adjacent surface of the buoyancy device 412 along the gap G7 is larger than that of the other gaps. Figures 36-47 The adjacent surfaces in the gap are further apart and are also not parallel to each other. More precisely, the gap G9 has a large triangle, such as... Figure 51 As shown.

[0131] exist Figure 52 and 53 In this configuration, a single buoyancy device 412 is fixed to the outer surface of a pipe or group of smaller pipes P11, the outer radius (diameter) of which is smaller than the radius of pipe P10. A strap S1 secures the buoyancy device 412 to pipe P11, clamping it in place.

[0132] like Figure 54 and 55 As shown, the buoyancy devices 412 are shaped and sized such that multiple buoyancy devices 412 can be easily and compactly laid on the pallet or cargo carrier 470 without the need for hangers or special clamps. Instead, each row of buoyancy devices 412 includes alternating buoyancy devices with convex portions 442 facing upwards and concave portions 428 facing upwards. The side surface portions 400 are tightly arranged to pull each other together. The conveyor belt S2 tightly wraps around the multiple buoyancy devices 412 and the pallet or cargo carrier 470, keeping the multiple buoyancy devices 412 safe and easy to move for transport.

[0133] Tenth Embodiment

[0134] Now for reference Figures 56-59 The buoyancy device 412' according to the tenth embodiment will now be explained. Given the similarity between the first and eighth embodiments, components identical to those in the first embodiment in the eighth embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the tenth embodiment may be omitted.

[0135] The buoyancy device 412' in the tenth embodiment has all the features of the ninth embodiment, such as the outer surface 420 having a first end 422, a second end 424, and an elongated portion 426. Figure 56 As shown, the first end 422 and the second end 424 of the outer surface 420 of each buoyancy device 412 have a gradually tapering semi-conical shape. The buoyancy device 412' also includes belt receiving grooves 450a, 450b and 450c.

[0136] However, as Figures 57-59 As shown, in the tenth embodiment, the buoyancy device 412' is not hollow. More precisely, the buoyancy device 412' is filled with a high-buoyancy foam material, such as expandable polyurethane, polystyrene, or other lightweight materials, to ensure the buoyancy of the buoyancy device 12. The outer surface 420 of the buoyancy device 412' defines the outer wall 420 (outer surface) of the buoyancy device 412'. The outer wall 420 can be formed of a metallic material or any of a variety of plastic or polymer materials suitable for use in marine environments.

[0137] Eleventh Embodiment

[0138] Now for reference Figures 60-64 The buoyancy device 412 according to the eleventh embodiment will now be explained. Given the similarity between the first and tenth embodiments, components identical to those in the first embodiment in the eleventh embodiment will be given the same reference numerals as those in the first embodiment. Furthermore, for the sake of brevity, descriptions of components identical to those in the first embodiment in the tenth embodiment may be omitted.

[0139] The buoyancy device 412" in the eleventh embodiment has all the features of the ninth and tenth embodiments, such as the outer surface 420 having a first end 422, a second end 424, and an elongated portion 426. Figure 60 As shown, the first end 422 and the second end 424 of the outer surface 420 of each buoyancy device 412 have a gradually decreasing semi-conical shape. The buoyancy device 412' also includes belt receiving grooves 450a, 450b and 450c.

[0140] However, in the eleventh embodiment, the buoyancy device 412" includes a plurality of recessed portions 480, on which lights or beacons 482 can be mounted.

[0141] In understanding the scope of this invention, the term "comprising" and its derivatives as used herein are intended to be open-ended terms that specifically describe the presence of said features, elements, components, groups, integers, and / or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers, and / or steps. The foregoing also applies to words with similar meanings, such as the terms "comprising," "having," and their derivatives. Additionally, the terms "part," "component," or "element," when used in the singular, can have a dual meaning of a single part or multiple parts. Furthermore, as used herein to describe the above embodiments, the following directional terms "forward," "backward," "upward," "downward," "vertical," "horizontal," "below," and "lateral," as well as any other similar directional terms, refer to those directions of the vehicle equipped with the mud transport riser assembly. Therefore, these terms used to describe the invention should be interpreted relative to a vehicle equipped with the mud transport riser assembly.

[0142] The degree terms used here, such as “basically,” “about,” and “approximately,” refer to reasonable deviations from the modified terms so that the final result does not change significantly.

[0143] Although only a few embodiments have been selected to illustrate the invention, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention as defined in the appended claims. For example, the size, shape, position, or orientation of various components may be changed as needed and / or desired. Elements shown as directly connected or in contact with each other may have intermediate structures arranged between them. The function of one element may be performed by two elements, and vice versa. The structure and function of one embodiment may be adopted in another embodiment. It is not necessary for all advantages to appear simultaneously in a particular embodiment. Each feature unique to the prior art, alone or in combination with other features, should also be considered as a separate description of the applicant's further invention, including the structural and / or functional concepts embodied in these features. Therefore, the above description of embodiments of the invention is for illustration only and is not intended to limit the invention as defined by the appended claims and their equivalents.

Claims

1. A buoy comprising: A buoyancy device having an outer surface having a first end, a second end, and an elongated portion extending from the first end to the second end; The elongated portion of the outer surface has a recessed portion extending from a first end to a second end. The shape of the recessed portion is configured such that the inner radius between the opposite edges of the recessed portion is complementary to the outer radius of the pipe. When the buoyancy device is connected to the pipe, the recessed portion contacts the pipe. The outer surface of the buoyancy device includes a convex portion opposite the recessed portion and two side portions, each side portion extending between a corresponding edge of the convex portion and the recessed portion, the side portions being angularly offset from each other and forming an acute angle between them, the convex portion including at least one strap receiving groove; and The buoyancy device is configured to be detachably connected to different numbers of identical buoyancy devices to radially surround a pipe with an outer radius greater than the inner radius of the recessed portion; by inserting a strap into the strap receiving groove of the buoyancy device and the respective strap receiving groove of the identical buoyancy device, the opposite edges of the recessed portion contact the outer radius of the pipe, and a gap is left between the middle portion of the recessed portion and the outer radius of the pipe.

2. The buoy according to claim 1, wherein: Each of the buoyancy devices has a gradually tapering semi-conical shape at its first and second ends on its outer surface.

3. The buoy according to claim 1, wherein: The acute angle is between 45 and 55 degrees.

4. The buoy according to claim 3, wherein: The acute angle is 50 degrees.

5. The buoy according to claim 1, wherein: The extension direction of the at least one strip receiving groove is perpendicular to the length direction of the convex portion.

6. The buoy according to claim 1, wherein: The convex portion includes a plurality of tape receiving grooves, the extension direction of which is perpendicular to the length direction of the convex portion.

7. The buoy according to claim 1, wherein: Viewed from the first end and the second end, the buoyancy device has a wedge-shaped form.

8. The buoy according to claim 1, wherein: The buoyancy device has a hollow interior.

9. The buoy according to claim 1, wherein: The buoyancy device is at least partially filled with foam material.

10. The buoy according to claim 1, wherein, When viewed from the first end and the second end, the convex and concave portions are curved.

11. The buoy according to claim 1, wherein, The at least one tape receiving groove includes a bridge-shaped portion; the bridge-shaped portion covers at least a portion of the tape receiving groove to form a channel within the at least one tape receiving groove.

12. The buoy of claim 11, wherein the at least one strap receiving groove comprises: A first tape receiving groove having the bridge-shaped portion, the bridge-shaped portion covering at least a portion of the first tape receiving groove to form a channel within the first tape receiving groove; And a second strip receiving groove that does not have a corresponding bridge-shaped portion.

13. A buoy comprising: A pipe, at least a portion of which has a cylindrical outer surface that defines an outer radius; as well as A buoyancy device having an outer surface having a first end, a second end, and an elongated portion extending from the first end to the second end, the buoyancy device being shaped and intended for connection to a pipe; and The elongated portion of the outer surface has a recessed portion extending from a first end to a second end. The shape of the recessed portion is configured such that the inner radius between the opposite edges of the recessed portion is complementary to the outer radius of the pipe. The buoyancy device is connected to the pipe, and a portion of the pipe is located inside the recessed portion of the buoyancy device. The outer surface of the buoyancy device includes a convex portion opposite the recessed portion and two side portions, each side portion extending between a corresponding edge of the convex portion and the recessed portion, the side portions being angularly offset from each other and forming an acute angle between them, the convex portion including at least one strap receiving groove; and The buoyancy device is configured to be detachably connected to a plurality of identical buoyancy devices, wherein the strap is inserted into the strap receiving groove of the buoyancy device and the respective strap receiving groove of the identical buoyancy device, such that the opposite edges of the recessed portion contact the outer radius of the pipe, and a gap is left between the middle portion of the recessed portion and the outer radius of the pipe.

14. The buoy according to claim 13, wherein: Each of the first and second ends of the outer surface of the buoyancy device has a gradually tapering semi-conical shape.

15. The buoy according to claim 13, wherein: The acute angle is 50 degrees.

16. The buoy according to claim 13, wherein: The at least one strip receiving groove extends in a length direction perpendicular to the convex portion.

17. The buoy according to claim 16, wherein: Multiple buoyancy devices are connected around the pipe and secured to each other by at least one strap extending into at least one strap receiving groove on each buoyancy device.

18. The buoy according to claim 13, wherein: The buoyancy device has a hollow interior.

19. The buoy according to claim 13, wherein: The buoyancy device is at least partially filled with foam material.

20. The buoyancy device of claim 13, wherein the at least one tape receiving groove includes a bridge-shaped portion covering at least a portion of the tape receiving groove to form a channel within the at least one tape receiving groove.

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