• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    BENDING LIMIT ENRIJECEDOR AND RELATED METHODS A bending restriction device includes at least two bending limiting units coupled together and having at least one stiffness ring disposed between them.
    公开号:BR102012013617B1
    申请号:R102012013617-1
    申请日:2012-06-01
    公开日:2021-02-02
    发明作者:Ron Smith；Jeff Hunt
    申请人:Deep Down, Inc.；
    IPC主号:
    专利说明:

    BACKGROUND Exhibition Field
    [001] The modalities exposed here generally refer to flexion restriction devices for flexible and umbilical tubes. In particular, the modalities exposed here refer to a flexion stiffening stiffener installed in umbilicals and flexible tubes. Background Technique
    [002] Flexible tubes, flow lines, power cables and umbilicals are usually connected to a rigid structure, such as an underwater conductor base, a pipe end manifold (PLEM), a wellhead or other structure. To prevent these tubes from flexing too much at the interface between flexible and rigid structures, bending restriction elements can be installed on the tube. Bending restraint elements, or bending limiters, are devices used when static (or quasi-static) loads act on a tube, while bending stiffeners are separate devices that act to resist dynamic loads. The bending restraint element usually includes several interlocking elements, which articulate when subjected to an external load and lock together to form a smooth curved radius known as the locking radius. The locking radius can be chosen to be equal to or greater than the minimum bending radius of the tube. Once the elements have locked together, the moment of the present bending is transferred to the elements and back through an interface between the flexible and the rigid structure, thereby protecting the tube from potentially harmful loads.
    [003] The installation of stiffeners and flexion limiters can be very expensive, as current technology allows units to be installed only during the umbilical manufacturing process. Because of this, larger umbilicals now require immense internal diameter limiters to fit over the terminal end of the umbilical. Because of this, there are large spaces between the outer diameter of the umbilical and the inner diameter of the limiters (that is, the annular space).
    [004] Therefore, there is a need for a device capable of providing flexural and stiffness limiting characteristics together with a quick installation. EXHIBITION SUMMARY
    [005] In one aspect, the modalities shown here refer to a flexion restraint device that includes at least two flexion limiting units coupled together and having at least one stiffening ring disposed between them.
    [006] In other respects, the modalities set out here refer to a flex tube inhibition method, the method including the installation of at least two flexion limiting units coupled end to end together in at least a portion of the flexible tube and the provision of at least one stiffness ring between at least two coupled bending limiting units.
    [007] Other aspects and advantages of the invention will be evident from the description below and the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS
    [008] Figure 1 shows a perspective view of a bending limiting stiffener according to one or more modalities of the present exhibition.
    [009] Figures 2A to 2C show perspective views of flexion limiting units divided according to one or more modalities of the present exhibition.
    [0010] Figure 3 shows a cross-sectional view of the flexion limiting stiffener of figure 1 according to one or more of the modalities of the present exhibition.
    [0011] Figures 4A and 4B show enlarged cross-sectional views of the flexion limiting stiffener of figure 3 according to one or more of the modalities of the present exhibition. DETAILED DESCRIPTION
    [0012] In one aspect, the modalities exposed here refer to a flexion limiter with multiple stiffeners incorporated there, or to a flexion stiffener stiffener. The flexion stiffener can be used on umbilicals and other flexible tubes for flexural strength, while also limiting the amount of radius of flexion of the umbilical or flexible tubes. Referring to Figure 1, a perspective view of a flexion stiffening stiffener 100 according to one or more embodiments of the present exhibit is shown. The bending limiting stiffener 100 includes a series of individual bending limiting units 105 coupled together and installed in an umbilical or flexible tube (not shown). The umbilical or flexible tube can extend from a termination point or connector 102, which, finally, can end in a rigid structure (not shown), such as a probe structure or equipment in the probe structure.
    [0013] Referring now to Figures 2A and 2B, perspective views of an individual flexion limiting unit 105 according to one or more of the modalities of the present exhibition are shown. The individual bending limiting units 105 are generally cylindrical in shape with a central hole generally cylindrical axially through there. The inner diameter of the central hole can be configured to be slightly larger than an outer diameter of a flexible or umbilical tube in which the bending limiting units can be installed. Other external profile configurations can be square, polygonal or other desired external profiles. The flexion limiting unit 105 has a male end 107, which includes a male ring 108 or a flange structure. At the opposite end of the flexion limiting unit 105 from the male end 107 is a female end 109 having an internal lip 110 formed there. Multiple flexion limiting units 105 can be coupled together by inserting the male end 107 of a first flexion limiting unit into the female end 109 of a second flexion limiting unit. With the male end 107 inserted in the female end 109, the male ring 108 of the male end 107 is configured to abut the inner edge 110 of the female end 109 and prevent the male end 107 from separating from the female end 109 (i.e., the outer diameter of the male ring 108 is greater than an inner diameter of the inner rim 110). The coupling of multiple bending limiting units together forms a series of coupled bending limiting units that constitute the bending limiting stiffener.
    [0014] With reference in addition to figure 2C, as shown, the flexion limiting units 105 are configured as divided units. In certain embodiments, flexion limiting units 105 can be divided into two identical halves (as shown), although those skilled in the art understand alternative types of divided configurations that can be used, including, but not limited to, not equally divided and / or more than two divided components. The split halves of the bending limiting units 105 can be fastened together using mechanical fasteners 112 (for example, dowels, screws, rivets, etc.). In other embodiments, the split halves of the bending limiting units 105 can be secured by other types of fasteners, including welds, adhesives and other fasteners known to those skilled in the art. In still other embodiments, the divided halves can be hinged at one edge (ie, in a shellfish configuration), while fasteners are used for fixing the other edge after installation. The divided halves of the bending limiting units 105 can be molded or integrally formed by divided units. Flexion limiting units 105 can be made of various types of hard plastics or other materials of rigid structure. In other embodiments, the bending limiting units 105 can be made of steel or other metallic materials.
    [0015] With reference now to figure 3, a cross-sectional view of a flexion limiting stiffener 100 according to one or more of the modalities of the present exhibition is shown. The bending limiting stiffener 100 includes two or more coupled bending limiting units 105 and at least one stiffness ring 120. Stiffness rings 120 can be flat and generally in the form of discs or circular inserts. Other stiffness ring shapes (for example, polygonal, elliptical, etc.) can also be used. One or more rigidity rings 120 can be installed on a female end of a first unit (109 in figures 2A and 2B) and close to the male ring of a second unit (108 in figures 2A and 2B), that is, the “connection coupled ”of the bending limiting units 105 for the provision of stiffness (i.e., bending resistance) over a length of the bending limiting stiffener 100. Stiffness rings 120 can be of any type of resilient thermoplastic material, including , but not limited to, nylon, polyurethane, polyethylene and other types of thermoplastic materials known to those skilled in the art. In addition, rigidity rings 120 can be divided to be used with the split halves configuration of flexure limiting units 105. In certain embodiments, rigidity rings 120 can be between a quarter inch (6.35 mm) and five inches (12.7 cm) thick. In certain embodiments, the stiffness rings 120 can be around an inch (25.4 mm) thick. The multiple stiffness rings used in the bending limiting stiffener 100 may have uniform thicknesses in certain embodiments. In alternative embodiments, the stiffness rings may vary in thickness along a cross section thereof. In other embodiments, multiple stiffness rings may be of different thickness from each other in the same coupled connection (that is, each stiffness ring may have a different thickness than the next stiffness ring).
    [0016] The flexion stiffener 100 shown here serves as an integrated flexion stiffener and flexion limiter. As external forces are applied to the bending limiting stiffener 100, the bending limiting stiffener 100 initially present as a bending stiffener. As the external forces act on the flexion stiffening stiffener 100 and cause it to flex, the stiffness rings 120 provide resistance (i.e., stiffness) to counteract the external forces and the bending. The amount of stiffness provided by stiffness rings 120 can depend on several factors, as discussed above, including, but not limited to, the number of stiffness rings 120 provided in a coupled connection, the thickness of the stiffness ring and the material of the ring stiffness. Additional rigidity rings 120 arranged in a coupled connection provide greater flexural strength and rigidity in the coupled connection.
    [0017] As mentioned, a method of varying the stiffness over a length of the bending limiting stiffener 100 is to increase the number of stiffness rings in the coupled connections along its length. Figures 4A and 4B show enlarged cross-sectional views of the flexion limiting stiffener 100 shown in figure 3 according to one or more embodiments of the present exhibit. Figure 4A shows several coupled connections of the flexion limiting units 105 near the termination point 102. In the first coupled connection “1”, a single rigidity ring 120 can be arranged on a female end 109b of a second unit 105b and close to the male ring 108a of male end 107a of a first unit 105a coupled to the second unit 105b. In the second coupled connection “2”, two stiffness rings 120 can be arranged at a female end 109c of a third unit 105c and close to the male ring 108b of the male end 107b of the second unit 105b.
    [0018] With brief reference to figure 4B, which shows the distal end of the flexion limiting stiffener 100, in the coupled connection indicated as “4”, four rigidity rings 120 can be arranged on a female end 109e of a second unit 105e and close to the male ring 108d of a male end 107d of a first unit 105d coupled to the second unit 105e. In addition, five or more stiffness rings 120 can be arranged on a female end 109f of a third unit 105f and close to the male ring 108e of the second unit 105e on the coupled connection indicated as "5". In coupled connections having two or more stiffness rings, the division in each of the multiple stiffness rings can be arranged so that none of the divisions are circumferentially aligned with divisions of the adjacent stiffness rings. In alternative embodiments, the stiffness ring divisions can be circumferentially aligned. In still other embodiments, instead of having multiple stiffness rings stacked on a coupled connection, a single stiffness ring having increased thickness can be arranged on each successive coupled connection along a length of the bending limiting stiffener 100.
    [0019] Due to the arrangement of stiffness rings along the length of the bending limiting stiffener (i.e., an increasing number of stiffness rings being arranged along a length from the proximal end at the termination point to the end distal), when external forces are initially applied to the bending limiting stiffener 100, the “bending” will start at the coupled connection having fewer stiffness rings, that is, the coupled connection with the least stiffness. As the external forces are increased in the bending limiting stiffener, the bending runs towards the stiffer portions of the bending limiting stiffener (that is, the portions with the most stiffness rings 120) until the bending is in the last connection coupled with the largest number of stiffness rings 120, at which point the bending limiter can engage, as will be described subsequently. In other words, the stiffness rings 120 are arranged along a length of the bending limiting stiffener 100, so that the external load is transmitted along the length of the bending limiting stiffener 100, from the connection less rigid coupling for the more rigid coupled connection. Finally, although figures 4A and 4B illustrate a particular arrangement of stiffness rings 120 in the coupled connections, one skilled in the art will appreciate that any number or arrangement of stiffness rings 120 per coupled connection can be provided for the production of stiffness characteristics. in particular the bending limiting stiffener 100.
    [0020] As the multiple connections coupled between the adjacent flexion limiting units 105 allow the flexion limiting stiffener 100 to flex, an angle "α" shown in figures 4A and 4B, which indicates a flexion angle between two units flexure limiters 105 coupled to the flexion limit stiffener 100, can be formed. As the entire bending limiting stiffener 100 flexes, the central geometrical axes of coupled bending limiting units 105 can be displaced at a particular bending angle, so that the male ring 108 in a first unit can contact and compress or deform one or more stiffness rings 120 in the coupled connection. As the rigidity ring 120 is compressed, it acts to resist the external load causing it to flex. As the stiffness ring 120 is further compressed, it additionally resists bending. Thus, when the stiffness ring 120 is partially compressed, forces can be transmitted between the coupled bending limiting units 105 through the stiffness rings 120. The stiffness rings 120 are configured to compress up to around 50% of the stiffness limit. flow of material in certain modalities. In other embodiments, the stiffness rings 120 can be configured to compress up to 75% of the material flow limit.
    [0021] When the rigidity ring 120 is completely or fully compressed (that is, up to a limit of available material flow) by the male ring 108, the rigid male ring 108 and the rear wall 111 of the male end 107 can fit together, what is the maximum allowable bending angle α. In other words, at the maximum bending angle α, the stiffness ring 120 can be fully compressed, so that the male ring 108 contacts the rear wall 111 of the male end 107 and cannot run any further. Thus, in effect, the bending limiter feature is fitted, which restricts bending beyond a particular bending radius. In certain embodiments, the maximum bending angle α for each coupled connection can be up to around 20 degrees. In other modalities, the maximum bending angle α for each coupled connection can be up to around 10 degrees. In still other modalities, the maximum bending angle α for each coupled connection can be up to around 5 degrees.
    [0022] In certain embodiments, methods of inhibiting flexion of a flexible tube include the installation of at least two flexion limiting units coupled end to end together in at least a portion of the flexible tube and the provision of at least one ring stiffness between at least two coupled bending limiting units. The method can also include the installation of split halves of the bending limiting units attached to the flexible tube and the fixation of the halves together. With reference to stiffness rings, the method may further include the provision of stiffness over a length of the flexible tube with at least one stiffness ring by compressing one or more stiffness rings. The stiffness along a length of the bending restraint device can be increased by providing an increasing number of stiffness rings along a length of the bending restraint device. In addition, the method may include restricting the flexion of the flexible tube to a maximum flexion radius.
    [0023] More specifically, the methods of mounting the bending limiting stiffener (or bending restraint element) in a flexible or umbilical tube, according to one or more of the modalities set out here, include the installation of a series of limiting units of flexion individually in the flexible tube. A first flexion limiting unit can be installed by coupling a female end of a first flexion limiting unit to a male end of the termination point (102 in figure 4A). As previously described, the flexion limiting units have a split configuration, and therefore can be installed on the flexible tube, after the flexible tube is already attached to a termination point. Then, one or more stiffness rings can be installed on a female end of a second bending limiter, and the female end of the second bending limiter can be coupled to the male end of the first bending limiter unit. In certain embodiments, one or more stiffness rings can be detached from the female end of the flexion limiting unit and merely allowed to “float” on a volume of the female end. In other embodiments, one or more rigidity rings can be attached or attached to the female end. Continuing with the assembly, a female end of a third bending limiter, having one or more stiffness rings disposed there, can be coupled to the male end of the second bending limiting unit. This method can continue with subsequent bending limiting units being coupled to the previous bending limiting unit until a series of bending limiting units is coupled along a length of the flexible tube and constitutes a full length bending limiting stiffener. Those skilled in the art will appreciate that any number of bending limiting units can be coupled together in series and installed along a length of the flexible tube.
    [0024] Advantageously, the modalities of the present exhibition provide a flexion limiting stiffener capable of quick and easy installation in any type of flexible or umbilical tube. Due to the divided nature of the bending limiting units, the units are not required to be slid across a large blunt end at a termination point on the flexible tube. In addition, the bending stiffener stiffener acts as a bending stiffener and a bending limiter. The stiffener inserts provide bending resistance along the length of the bending limiting stiffener, while the bending limiting units provide a bending limiting feature for restricting the maximum bending radius of a flexible or umbilical tube. Due to the easy installation and the simplicity of the design, the flexion stiffener is a cost and time saving device that will be appreciated by the industry.
    [0025] Although the present exhibition has been described with respect to a limited number of modalities, those skilled in the art, having the benefit of this exhibition, will appreciate that other modalities can be envisaged, which do not deviate from the scope of the exhibition, as described here. Therefore, the scope of the exposure should be limited by the appended claims.
    权利要求:
    Claims (17)
    [0001]
    1. Bending restriction device (100), characterized by the fact that it comprises: at least two bending limiting units (105) coupled together, in which each bending limiting unit comprises a male end (107) and a female end ( 109); at least one stiffness ring (120) having a first cumulative axial thickness and arranged on the female end (109) of a first flexion limiting unit (105a); and at least one stiffness ring (120) having a second cumulative axial thickness and disposed at the female end (109) of a second flexure limiting unit (105b), in which the first and second cumulative axial thicknesses are different.
    [0002]
    2. Flexion restraining device (100) according to claim 1, characterized in that each flexion limiting unit (105) is generally cylindrical having a central orifice therethrough.
    [0003]
    Bending restriction device (100) according to claim 2, characterized in that the male end (107) of the first bending limiting unit (105a) comprises a flange (108) configured to fit on a flange internal (110) formed at the female end (109) of the second flexion limiting unit (105b).
    [0004]
    Bending restriction device according to claim 1, characterized in that at least one bending limiting unit (105) comprises two divided halves fastened together.
    [0005]
    5. Bending restriction device according to claim 1, characterized by the fact that each of the stiffness rings (120) has the same axial thickness.
    [0006]
    Bending restriction device according to claim 1, characterized in that at least one stiffness ring (120) disposed on the female end (109) of the first bending limiting unit (105a) comprises an axial thickness different from o at least one stiffness ring (120) disposed on the female end (109) of the second flexure limiting unit (105b).
    [0007]
    Bending restriction device according to claim 1, characterized in that at least one stiffness ring (120) disposed on the female end (109) of the first bending limiting unit (105a) comprises a thickness between a inch (6.35 mm) and five inches (12.7 cm).
    [0008]
    Bending restriction device according to claim 1, characterized in that it comprises at least three bending limiting units (105), in which a number of stiffness rings (120) arranged between adjacent pairs of at least three bending limiting units (105) is different.
    [0009]
    Bending restriction device according to claim 1, characterized in that at least one stiffness ring (120) disposed on the female end (109) of the first bending limiting unit (105a) comprises a resilient thermoplastic material.
    [0010]
    Bending restriction device according to claim 1, characterized in that at least one stiffness ring (120) disposed on the female end (109) of the first bending limiting unit (105a) is configured to compress up to around 50% flow limit.
    [0011]
    11. Bending restriction device according to claim 1, characterized in that a maximum bending angle between at least two coupled bending limiting units (105) is around 20 degrees.
    [0012]
    Bending restriction device according to claim 1, characterized in that a maximum bending angle between at least two coupled bending limiting units (105) is around 5 degrees.
    [0013]
    Bending restriction device according to claim 1, characterized in that at least two bending limiting units (105) are configured to be installed in a flexible tube.
    [0014]
    Bending restriction device according to claim 1, characterized in that at least one stiffness ring (120) disposed on the female end (109) of the first bending limiting unit (105a) comprises two divided halves, in that each half has a semi-circular shape.
    [0015]
    Bending restriction device according to claim 1, characterized in that at least one bending limiting unit (105a) comprises two divided portions fastened together, in which the divided portions are different.
    [0016]
    Bending restriction device according to claim 1, characterized in that at least one stiffness ring (120) disposed on the female end (109) of the first bending limiting unit (105a) comprises two divided portions fixed in together, in which the divided portions are different.
    [0017]
    Bending restriction device according to claim 1, characterized in that at least one stiffness ring (120) disposed on the female end (109) of the first bending limiting unit (105a) comprises more than two divided portions .
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    法律状态:
    2014-01-28| B03A| Publication of an application: publication of a patent application or of a certificate of addition of invention|
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2020-01-28| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-07-28| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law|
    2020-12-01| B09A| Decision: intention to grant|
    2021-02-02| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 01/06/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161492162P| true| 2011-06-01|2011-06-01|
    US61/492,162|2011-06-01|
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