Metallic tubular connection component and method for obtaining such a component by additive manufacturing

Abstract

A metal tubular connecting component (1) has a total axial length (L) T The inner surface (5) and the outer surface (6) define a wall (7), and the connecting component also has an outer transition surface (ST). ext ) and inner transition surface (ST int ), outer transition surface (ST) ext ) and inner transition surface (ST int The transition thickness (W) of the defining wall (7) is such that the first threaded end (2) is formed by the first outer surface portion (P1) extending along the first axial length (L1). ext The second threaded end (3) is defined by the second inner surface portion (P2) extending along the second axial length (L2). int The connecting member (1) is characterized in that the sum of the first axial length (L1) and the second axial length (L2) is less than or equal to the total axial length (L) of the connecting member (1). T ).

Description

Technical Field

[0001] This invention relates to metal tubular components in the fields of oil and gas, energy or storage, particularly for use in oil and gas well production or transportation, geothermal applications or carbon capture.

[0002] More specifically, the present invention relates to a metal tubular connecting component, for example made of steel, intended to connect at least two metal tubular members that are incompatible due to differences in their inner and / or outer diameters, thicknesses, and the geometry of the threads to be connected. This connecting component (1) preferably has a yield strength greater than or equal to 550 MPa.

[0003] For the purposes of this invention, "connecting component" is understood to mean a connecting fitting or connector, and is frequently referred to in the literature as one of the following terms: "cross-over", "circulating heads", "circulating swage", or "water bushing".

[0004] The present invention further relates to a method for obtaining such a metal tubular connecting component by additive manufacturing. Background Technology

[0005] In the prior art, such tubular metal connectors have two threaded ends, typically of different diameters, and a transition portion connecting these two threaded ends, which, when appropriate, allows for a gradual change from one diameter to another. These tubular metal connectors are obtained using solid metal bars, blocks, or thick tubes through subtractive manufacturing methods, particularly through various controlled machining and material removal processes (e.g., cutting or boring).

[0006] The disadvantage of existing connecting components is their weight, which complicates the work of operators handling these components, especially during transportation, handling, and use. Furthermore, the subtractive manufacturing methods used in existing connecting components have several drawbacks. In particular, the greater the amount of material to be removed, the higher the manufacturing cost. Therefore, with subtractive methods, manufacturers are forced to remove as little material as possible to optimize component manufacturing costs. This economic constraint leads to a technical constraint—a minimum amount of material to be removed—resulting in the walls of existing connecting components having significant thickness in the transition sections. At these transition sections, more material could be removed, reducing the component's weight and making it easier for operators to handle during transportation, use, and processing. Conversely, to save costs, the final component has a large amount of excess material in its transition sections, making it heavy and cumbersome. Moreover, this excess material also represents a loss of material that could be reused in the manufacture of other components. Therefore, this material loss ultimately also represents an economic loss. Summary of the Invention

[0007] To overcome the shortcomings of existing connecting components, the present invention relates to a metal tubular connecting component having at least a rotation axis (x) and a total axial length (L). T The metal tubular connecting component includes:

[0008] -Inner and outer surfaces, the inner and outer surfaces define the wall.

[0009] -At least one first outer transition plane (B) ext ) and at least one second outer transition plane (D ext ), the first outer transition plane (B) ext ) and the second outer transition plane (D ext All are orthogonal to the axis of rotation (x).

[0010] -At least one first inner transition plane (A) int ) and at least one second inner transition plane (C int ), the first inner transition plane (A) int ) and the second inner transition plane (C int All are orthogonal to the axis of rotation (x).

[0011] -External transition surface (ST) ext ), having a truncated conical shape defined by an outer transition generatrix (G), the outer transition generatrix being inclined at an angle α1 relative to the axis of rotation (x), and an outer transition surface (ST ext From the first outer transition plane (B) ext ) extends to the second outer transition plane (D) ext ),

[0012] -Inner transition surface (ST) int ), having a truncated conical shape defined by an inner transition generatrix (G”), the inner transition generatrix being inclined at an angle α2 relative to the axis of rotation (x), and an inner transition surface (ST int From the first inner transition plane (A) int ) extends to the second inner transition plane (C int ),

[0013] External transition surface (ST) ext ) and inner transition surface (ST int The transition thickness (W) of the defined wall.

[0014] - A first threaded end having either a male or female thread, having a first end plane (S1) orthogonal to the axis of rotation (x), a first inner diameter (ID1) and a first outer diameter (OD1), the first threaded end consisting of a first inner surface portion (P1) having the first inner diameter (ID1). int ) and a first outer surface portion (P1) having a first outer diameter (OD1). ext The first inner surface portion extends from the first end plane (S1) to the first inner transition plane (A). int The first outer surface portion extends from the first end plane (S1) to the first outer transition plane (B) along the first axial length (L1). ext ), the first inner surface portion (P1) int ) has a first inner surface generatrix (G1) int The general cylindrical shape is defined by ) and the first outer surface portion (P1) ext ) has a first outer surface generatrix (G1) ext The shape is roughly cylindrical and defined.

[0015] - A second threaded end having either a male or female thread, having a second end plane (S2) orthogonal to the axis of rotation (x), a second inner diameter (ID2), and a second outer diameter (OD2), the second threaded end consisting of a second inner surface portion (P2) having the second inner diameter (ID2). int ) and a second outer surface portion (P2) having a second outer diameter (OD2). ext Defined by ), the second inner surface portion extends along the second axial length (L2) from the second end plane (S2) to the second inner transition plane (C). int The second outer surface portion extends from the second end plane (S2) to the second outer transition plane (D). ext ), second inner surface portion (P2) int ) has a second inner surface generatrix (G2) int The approximate cylindrical shape defined by ) and the second outer surface portion (P2) ext ) has a second outer surface generatrix (G2) extThe shape is roughly cylindrical and defined.

[0016] The sum of the first axial length (L1) and the second axial length (L2) is less than or equal to the total axial length (L) of the metal tubular connecting component. T ),

[0017] The metal tubular connecting component is characterized in that the first threaded end has a first wall thickness (E1), the second threaded end has a second wall thickness (E2), and the transition thickness (W) satisfies the following mathematical formula:

[0018] 1x max(E1;E2)≤W≤1.5x max(E1;E2)

[0019] Where max(E1; E2) represents the maximum value selected from the first thickness (E1) and the second thickness (E2), and corresponds to the first thickness (E1) and the second thickness (E2) being equal. Therefore, the wall thickness variation in the transition section is smaller. In other words, the wall thickness in the transition section is more uniform than that in the connecting parts of the prior art.

[0020] In this patent application, the term "threaded end" is understood to mean an end having threads along its entire or part of its length. Furthermore, in this patent application, the term "generally cylindrical shape" refers to a tubular surface capable of having surface irregularities such as threads.

[0021] Furthermore, in this patent application, the term "axial length" refers to any length along the axis of rotation (x). Therefore, any element or part of a connecting member having an axial length is an element or part having an axis that is approximately zero relative to the axis of rotation (x) of the connecting member.

[0022] This ratio between the first and second axial lengths (L1) and (L2) is attributed to the sequence in which the transition planes follow each other along the axis of rotation (x), from the first end plane (S1) to the second end plane (S2). According to one embodiment, plane (B) ext ) and (C int The axial lengths (L1) and (L2) can overlap. In this case, the sum of the axial lengths (L1) and (L2) equals the total axial length (L) of the connecting parts. T According to plane (B) ext ) and (C int In one embodiment where they do not overlap, the plane (A) int Closer to the plane (B) ext ) rather than a plane (C) int And plane (D) ext Closer to the plane (C) int ) rather than plane (B) extIn this case, the sum of the axial lengths (L1) and (L2) is strictly less than the total axial length (L) of the connecting components. T This arrangement of the transition planes results in the transition plane (A) located on the first inner surface. int ) and the transition plane of the second outer surface (D ext Refinement of the wall portion between the components: This wall portion is called the transition portion. This refinement results in a reduction in the wall thickness within the transition portion and a reduction in the weight of the connecting components.

[0023] The first and second end planes (S1) and (S2) define the total axial length (L) of the connecting components. T The plane of the connecting component from the first end plane (S1) to the second end plane (S2) along the total axial length (L) T Extending upwards.

[0024] First inner transition plane (A) int A is the cross-sectional plane of the connecting component. int Orthogonal to the axis of rotation (x) and passing through the generatrix of the first inner surface (G1) int The intersection between the inner transition bus (G”) and the inner transition bus (G”).

[0025] First outer transition plane (B) ext ) is the cross-sectional plane of the connecting component. Plane (B) ext Orthogonal to the axis of rotation (x) and passing through the generatrix of the first outer surface (G1) ext The intersection between the outer transition bus (G) and the outer transition bus (G).

[0026] Second inner transition plane (C) int ) is the cross-sectional plane of the connecting component. Plane (C) int Orthogonal to the axis of rotation (x) and passing through the generatrix of the second inner surface (G2) int The intersection between the inner transition bus (G”) and the inner transition bus (G”).

[0027] Second outer transition plane (D) ext ) is the cross-sectional plane of the connecting component. Plane (D) ext Orthogonal to the axis of rotation (x) and passing through the second outer surface generatrix (G2) ext The intersection point between the outer transition bus (G) and the outer transition bus (G).

[0028] The transition thickness (W) corresponds to the transition from the first outer transition plane (B). ext ) extends to the second inner transition plane (C int The thickness of the wall portion of the transition surface (ST). In other words, the transition thickness (W) at the outer transition surface (ST). ext ) and inner transition surface (ST intThe transition thickness (W) extends over the entire wall portion of the overlap. The length of the transition thickness (W) extending thereover is therefore determined by the first outer transition plane (B). ext ) and the second inner transition plane (C int (Definition)

[0029] In this patent application, the term "thickness," when referring to any wall portion, means the thickness measured along an axis perpendicular to at least one of the surfaces defining the wall in the portion under consideration, namely, one of the following surfaces: an inner surface, an outer surface, or an inner transition surface (ST). int ) or external transition surface (ST ext ).

[0030] Two inner surface busbars (G1) int ) and (G2 int ) and two outer surface busbars (G1) ext ) and (G2 ext All of them are approximately zero angles relative to the axis of rotation (x). "Approximately zero angles" here means that they are less than or equal to 2° relative to the axis of rotation (x).

[0031] According to one embodiment, the first outer diameter (OD1) is different from the second outer diameter (OD2).

[0032] According to one embodiment, the first inner diameter (ID1) is different from the second inner diameter (ID2).

[0033] According to one embodiment, the first outer diameter (OD1) is different from the second outer diameter (OD2), and the first inner diameter (ID1) is different from the second inner diameter (ID2).

[0034] According to one embodiment, the second outer diameter (OD2) can be equal to the first inner diameter (ID1).

[0035] According to one embodiment, the first and second outer diameters (OD1) and (OD2) are between 25 mm and 950 mm. Preferably, the larger of the two outer diameters (OD1) and (OD2) is between 75 mm and 950 mm, and the smaller of the two outer diameters (OD1) and (OD2) is between 25 mm and 700 mm.

[0036] According to one embodiment, the first and second inner diameters (ID1) and (ID2) are between 20 mm and 900 mm. Preferably, the larger of the two inner diameters (ID1) and (ID2) is between 70 mm and 900 mm, and the smaller of the two inner diameters (ID1) and (ID2) is between 20 mm and 695 mm.

[0037] Preferably, the difference between (OD1) and (OD2) is less than or equal to 500 mm and the difference between (ID1) and (ID2) is less than or equal to 500 mm.

[0038] The first inner diameter (ID1) is at the first inner transition plane (A) int Measured near the second inner diameter (ID2) at the second inner transition plane (C). int Measured near the first outer diameter (OD1) at the first outer transition plane (B). ext Measured near the second outer diameter (OD2) at the second inner transition plane (D). ext Measurements are taken near the vicinity. The inner and outer diameters of the first and second ends can therefore vary.

[0039] All of the aforementioned features, individually or collectively, contribute to reducing the area located in the first inner transition plane (A). int ) and the second outer transition plane (D ext The wall thickness in the wall section between () is called the transition section.

[0040] According to one embodiment, the first end has at least one first unthreaded portion, while the second end has at least one second unthreaded portion.

[0041] According to one embodiment, the first unthreaded portion transitions from the first inner transition plane (A). int The first unthreaded portion extends along the first unthreaded length (l1), while the second unthreaded portion extends from the second inner transition plane (C). int It extends from the second unthreaded length (l2).

[0042] The first and second unthreaded lengths (l1) and (l2) are axial lengths.

[0043] Advantageously, each of the first and second unthreaded lengths (l1) and (l2) is greater than or equal to 150 mm. This length of these unthreaded portions allows the connecting parts to be gripped or held by tools commonly used by the operator, so as to assemble the connecting parts to at least two tubular members to be connected, for example by screwing.

[0044] According to one embodiment, the inner surface from the first end plane (S1) to the second end plane (S2) includes the following portion:

[0045] - First threaded or unthreaded portion (T1) int ),

[0046] -The first cylindrical, unthreaded section

[0047] - Truncated conical section (ST) int ),

[0048] -The second cylindrical unthreaded portion, and

[0049] - Second thread or unthreaded portion (T2) int ).

[0050] According to one embodiment, the outer surface from the first end plane (S1) to the second end plane (S2) includes the following portions:

[0051] - First threaded or unthreaded portion (T1) ext ),

[0052] -The third cylindrical unthreaded section

[0053] - Truncated conical section (ST) ext ),

[0054] -The fourth cylindrical unthreaded section, and

[0055] - Second thread or unthreaded portion (T2) ext ).

[0056] According to one embodiment, the first and second thicknesses (E1) and (E2) are between 2 mm and 300 mm, more preferably between 2 mm and 150 mm, and even more preferably between 2 mm and 75 mm.

[0057] According to one embodiment, the first and second thicknesses (E1) and (E2) are such that |(E1)-(E2)| ≤ 65 mm, preferably such that |(E1)-(E2)| ≤ 40 mm, and even more preferably such that |(E1)-(E2)| ≤ 25 mm.

[0058] Preferably, the first and second thicknesses (E1) and (E2) are equal.

[0059] According to one embodiment, the angles α1 and α2 relative to the axis of rotation (x) are both between 10° (inclusive) and 30° (inclusive). This allows for optimal fluid flow through the connecting component. Preferably, both angles α1 and α2 are between 15° (inclusive) and 25° (inclusive), more preferably both α1 and α2 are 20°. When angles α1 and α2 are greater than 30°, the fluid can no longer flow optimally, and the connecting component loses efficiency in terms of its fluid-carrying capacity. When angles α1 and α2 are less than 10°, the total axial length (L) of the component... T The size is too large and no longer conforms to the size standards for this type of accessory. Since the size standards are established for the optimal storage and handling of this type of product, it is preferable not to extend these accessories beyond the 10° angle of incidence, that is, not to make angles α1 and α2 less than 10°.

[0060] According to one embodiment, angles α1 and α2 such that |α1-α2| ≤ 5°. Preferably, angles α1 and α2 such that |α1-α2| ≤ 2°. More preferably, angles α1 and α2 such that |α1-α2| = 0°, therefore the outer transition surface (ST) ext ) and inner transition surface (ST int They are roughly parallel to each other and the transition thickness (W) is roughly constant along their entire length.

[0061] According to one embodiment, the transition thickness (W) is between 2 mm and 450 mm, preferably between 2 mm and 225 mm, more preferably between 3 mm and 75 mm, and even more preferably between 7 mm and 25 mm.

[0062] According to one embodiment, the total axial length (L) of the connecting component T The distance is between 0.3 meters and 6 meters, preferably between 0.3 meters and 2.5 meters, and more preferably between 0.6 meters and 1.5 meters.

[0063] The present invention further relates to a connecting member, the walls of which are produced, wholly or partially, by additive manufacturing. Preferably, the walls are produced entirely by additive manufacturing.

[0064] According to ISO / ASTM 52900:2015(E), the term "additive manufacturing" refers to the collective term for those techniques that create physical objects by continuously adding materials based on a geometric representation. ISO / ASTM 52900:2015(F) defines "additive manufacturing" as follows: a process of manufacturing parts by typically connecting materials layer by layer based on 3D model data, as opposed to subtractive manufacturing and molding manufacturing methods.

[0065] The inventors have discovered that, due to the uniformity of wall thickness, the present invention allows for uniform heat treatment on connecting parts, particularly in transition sections. This is not the case in the prior art, because the non-uniformity of wall thickness in the transition section inevitably causes the effect of heat treatment on the connecting parts to be non-uniform within the transition section.

[0066] Surprisingly, the inventors also discovered that non-destructive ultrasonic testing can be performed on the connecting components of the present invention due to the uniformity of wall thickness in the transition section. The purpose of non-destructive ultrasonic testing is to detect defects in the component wall based on the emission of ultrasonic signals and the detection of their reflections in relation to the acoustic interfaces they encounter in the wall thickness. More specifically, the size, shape, and location of the defect are determined based on the time elapsed between the emission of an ultrasonic signal at a specific location on the component wall and the detection of its reflection at another specific location on the wall. Therefore, when there is a large thickness difference between the location where the signal is emitted and the location where its reflection is detected, the signal may originate from multiple trajectories of the emitted ultrasonic waves, making it difficult to isolate it from other signals. Consequently, the signal to be detected cannot be used to assess the defect to be identified. Therefore, when the walls of the connecting components have significant thickness differences, such measurements are unreliable, to the point that some areas cannot be inspected, particularly in the transition section, due to the presence of multiple return signals from multiple ultrasonic paths, which are related to the geometry of the component in the transition section, particularly to the wall thickness and the tilt angle of the inner and outer transition surfaces. Therefore, in the prior art, non-destructive ultrasonic testing cannot be performed on connecting components. Therefore, it is only performed on the metal block before it undergoes conventional subtractive processing, and the final part is never ultrasonically tested, thus leaving potential defects in the walls of the manufactured part.

[0067] Another object of the present invention relates to a method for obtaining a connecting member, the method comprising at least:

[0068] i. The step of producing all or part of the wall by additive manufacturing.

[0069] ii. The steps of machining the first and second ends.

[0070] This method allows for the omission of at least the subtractive process used to obtain the wall. The wall thus forms a preform, which is subsequently threaded in machining step (ii) using existing methods. This method allows for limiting the amount of material required to obtain the wall, thereby avoiding the material waste typically resulting from subtractive processes.

[0071] According to the present invention, step (i) can be performed by one of the additive manufacturing methods belonging to the “direct energy deposition” category as defined in the ASTM F2792 standard, such as “laser metal deposition” (LMD), “wire arc additive manufacturing” (WAAM) or any other method that can be defined as a “direct energy deposition” method.

[0072] According to one embodiment, the method includes a third step (iii) of heat-treating the connecting component.

[0073] According to one embodiment, the machining step (ii) includes machining all surfaces of the component, which may be performed before or after the heat treatment step. Attached Figure Description

[0074] Other features and advantages of the invention will become apparent upon reading the detailed description provided below and from the accompanying drawings.

[0075] Figure 1 A longitudinal sectional view of a connecting component in the prior art;

[0076] Figure 2 A longitudinal sectional view of a connecting member according to an embodiment of the present invention;

[0077] The accompanying drawings not only supplement the invention but also help define it where appropriate. They are not limiting of the scope of the invention. Detailed Implementation

[0078] Figure 1 This is a longitudinal sectional view of the connecting component 1 in the prior art. The connecting component includes a rotation axis x and a total axial length L. T 7. Wall, 5. Inner surface and 6. Outer surface, 2. First threaded end and 3. Second threaded end and 4. Transition portion.

[0079] Transition section 4 from the first inner transition plane A int Extending to the second outer transition plane D ext .

[0080] The first end 2 consists of a first end plane S1 and a first outer surface portion P1. ext The first outer surface portion P1 is defined as follows: ext Extending along the first axial length L1 from the first end plane S1 to the first outer transition plane B ext .

[0081] The second end 3 consists of the second end plane S2 and the second inner surface portion P2. int The second inner surface portion P2 is defined as follows: int Extending from the second end plane S2 to the second inner transition plane C along the second axial length L2 int .

[0082] Second inner transition plane C int Orthogonally passing through the first outer surface portion P1 ext In other words, the first outer surface portion P1 ext Second inner surface portion P2 int In the second inner transition plane C int and the first outer transition plane B extThe parts overlap within the defined area. Therefore, the first axial length L1 and the second axial length L2 are such that their sum is greater than the total axial length L of the connecting component 1. T This results in the transition section 4, particularly within the second inner transition plane C. int and the first outer transition plane B ext Between, wherein the portion P1 ext and P2 int The overlapping part has a larger wall thickness and excess material in the middle wall 7.

[0083] To achieve smaller and more uniform wall thickness in the transition section of the connecting parts, the geometry of the existing connecting parts is insufficient because excess material is always present in the transition section.

[0084] Figure 2 The diagram schematically illustrates a longitudinal sectional view of a connecting member 1 according to an embodiment of the present invention. The connecting member 1 includes a first threaded end 2, a second threaded end 3, and a transition portion 4 connecting the threaded ends 2 and 3. Furthermore, the connecting member 1 includes a wall 7 defined by an inner surface 5 and an outer surface 6.

[0085] Wall 7 comprises multiple portions that can be defined by end planes and / or transition planes. More specifically, Figure 2 The connecting component 1 shown includes a first end plane S1, a second end plane S2, and a first inner transition plane A. int Second inner transition plane C int First outer transition plane B ext Second outer transition plane D ext .

[0086] The first end 2 has a first inner diameter ID1 and a first outer diameter OD1. The first end 2 extends from the first end plane S1 to the first outer transition plane B. ext .

[0087] The thread representation in the diagram is schematic. Typically, the threads at both ends have beveled surfaces.

[0088] The first end 2 includes a first outer surface portion P1 extending along the first axial length L1. ext The first axial length L1 is greater than the first inner surface portion P1. int The extended axial length.

[0089] The first end 2 also has a first unthreaded portion 9, which extends over a first unthreaded length l1. The wall 7 of the first end 2 has a first thickness E1 that is substantially constant over the entire first unthreaded length l1. In other words, the first thickness E1 is constant over the first inner surface portion P1. int and the first outer surface portion P1 ext The entire overlapping wall is roughly constant across its seven sections.

[0090] The first unthreaded portion 9 occupies a position close to the transition portion 4. In the threaded portion of the first end 2, the first thickness E1 varies according to the size and geometry of the thread. Figure 2 This embodiment indicates that the first end 2 has a female thread, that is, the inner surface 5 is threaded while the outer surface 6 is not. However, according to the present invention, the thread can exist on either the inner surface 5 or the outer surface 6 of the first end 2. The threaded portion of the first end 2 occupies a position distal to the transition portion 4.

[0091] The second end 3 has a second inner diameter ID2 and a second outer diameter OD2. The second inner diameter ID2 is smaller than the first inner diameter ID1, and the second outer diameter OD2 is smaller than the first outer diameter OD1. The second end 3 extends from the second end plane S2 to the second inner transition plane C. int .

[0092] The second end 3 includes a second inner surface portion P2 extending along the second axial length L2. int The second axial length L2 is greater than the second outer surface portion P2. ext The extended axial length.

[0093] The second end 3 also has a second unthreaded portion 8 extending over the second unthreaded length l2. The wall 7 of the second end 3 has a second thickness E2 that is substantially constant over the entire second unthreaded length l2. In other words, the second thickness E2 is constant over the second inner surface portion P2. int Second outer surface portion P2 ext The entire overlapping wall is roughly constant across its seven sections.

[0094] The second unthreaded portion 8 occupies a position close to the transition portion 4. In the threaded portion of the second end 3, the second thickness E2 varies according to the size and geometry of the thread. Figure 2 An embodiment is shown in which the second end 3 has a female thread, i.e., the inner surface 5 is threaded while the outer surface 6 is not. However, according to the invention, the thread can exist on either the inner surface 5 or the outer surface 6 of the second end 3. The threaded portion of the second end 3 occupies a position distal to the transition portion 4.

[0095] As shown in the first end 2 and the second end 3 Figure 2 As shown, they all have female threads, but the present invention also includes cases where both ends 2 and 3 have male threads, and cases where one end of both ends 2 and 3 has a female thread and the other end has a male thread.

[0096] Transition section 4 from the first inner transition plane A int Extending to the second outer transition plane D extThe connecting member 1 therefore comprises two wall portions, in which ends 2 and 3 are aligned with the transition portion 4. These two wall portions are referred to as connecting regions. Each connecting region is defined by an inner connecting radius and an outer connecting radius (not shown in the figure), thereby giving the connecting region an arcuate shape. The radius of curvature of the arcuate shape, i.e., the connecting radius, can be between 20 mm (inclusive) and 80 mm (inclusive), preferably between 25 mm (inclusive) and 65 mm (inclusive). More preferably, the connecting radius is measured to be 50 mm. The connecting radius must conform to these dimensions in order to limit the concentration of stress or force applied to the transition portion 4 when the connecting member 1 is under operating conditions. If the dimensions are not correctly determined, these stresses may exceed the yield strength of the connecting member 1.

[0097] The first connecting region is formed by the first inner transition plane A. int and the first outer transition plane B ext The second connecting region is defined by the second inner transition plane C. int Second outer transition plane D ext Demarcation. The first and second connection regions allow the first end 2 and the second end 3 to gradually connect to the transition section 4.

[0098] In the connection region, only one of the inner and outer diameters of the connecting component 1 changes, while the other remains unchanged. Therefore, in the first connection region, only the inner diameter ID1 changes according to the slope of the tilt angle α1 relative to the axis x. In the second connection region, only the second outer diameter OD2 changes according to the slope of the tilt angle α2 relative to the axis x.

[0099] The wall 7 portion with transition thickness W is located between the two connecting regions. More specifically, the wall 7 portion with transition thickness W extends from the first outer transition plane B. ext Extending to the second inner transition plane C int In this wall section 7, the inner surface 5 and the outer surface 6 are respectively referred to as the inner transition surface ST. int and external transition surface ST ext In contrast to the connecting area, in this wall section 7 with a transition thickness W, both the inner and outer diameters vary. The inner diameter varies according to the slope of the inclination angle α2 relative to the axis x. The outer diameter varies according to the slope of the inclination angle α1 relative to the axis x. Both angles α1 and α2 have values ​​between 10° (inclusive) and 30° (inclusive), such that: 10° ≤ α1 ≤ 30° and 10° ≤ α2 ≤ 30°. Inner transition surface ST int and external transition surface ST ext The difference in inclination between them shall not exceed 5 degrees (inclusive), preferably not exceed 2 degrees (inclusive), such that: |α1-α2|≤5°, preferably |α1-α2|≤2°.

Claims

1. A metal tubular connecting component (1), having at least a rotation axis (x) and a total axial length (L) T The metal tubular connecting component (1) includes: -Inner surface (5) and outer surface (6), inner surface (5) and outer surface (6) define the wall (7). -At least one first outer transition plane (B) ext ) and at least one second outer transition plane (D ext ), first outer transition plane (B ext ) and the second outer transition plane (D ext All are orthogonal to the axis of rotation (x). -At least one first inner transition plane (A) int ) and at least one second inner transition plane (C int ), first inner transition plane (A) int ) and the second inner transition plane (C int All are orthogonal to the axis of rotation (x). -External transition surface (ST) ext ), having a truncated conical shape defined by an outer transition generatrix (G), the outer transition generatrix being inclined at an angle α1 relative to the axis of rotation (x), and an outer transition surface (ST ext From the first outer transition plane (B) ext ) extends to the second outer transition plane (D) ext ), -Inner transition surface (ST) int ), having a truncated conical shape defined by an inner transition generatrix (G), the inner transition generatrix being inclined at an angle α2 relative to the axis of rotation (x), and an inner transition surface (ST int From the first inner transition plane (A) int ) extends to the second inner transition plane (C int ), External transition surface (ST) ext ) and inner transition surface (ST int The transition thickness (W) of the defining wall (7) is defined. - A first end (2) having a male or female thread, having a first end plane (S1) orthogonal to the axis of rotation (x), a first inner diameter (ID1) and a first outer diameter (OD1), the first end (2) being a first inner surface portion (P1) having the first inner diameter (ID1). int ) and a first outer surface portion (P1) having a first outer diameter (OD1). ext The first inner surface portion extends from the first end plane (S1) to the first inner transition plane (A). int The first outer surface portion extends from the first end plane (S1) to the first outer transition plane (B) along the first axial length (L1). ext ), first inner surface portion (P1) int ) has a first inner surface generatrix (G1) int The general cylindrical shape is defined by ) and the first outer surface portion (P1) ext ) has a first outer surface generatrix (G1) ext The shape is roughly cylindrical and defined. - A second end (3) having a male or female thread, having a second end plane (S2) orthogonal to the axis of rotation (x), a second inner diameter (ID2) and a second outer diameter (OD2), the second end (3) being formed by a second inner surface portion (P2) having the second inner diameter (ID2). int ) and a second outer surface portion (P2) having a second outer diameter (OD2). ext Defined by ), the second inner surface portion extends along the second axial length (L2) from the second end plane (S2) to the second inner transition plane (C). int The second outer surface portion extends from the second end plane (S2) to the second outer transition plane (D). ext ), second inner surface portion (P2) int ) has a second inner surface generatrix (G2) int The approximate cylindrical shape defined by ) and the second outer surface portion (P2) ext ) has a second outer surface generatrix (G2) ext The shape is roughly cylindrical and defined. The sum of the first axial length (L1) and the second axial length (L2) is less than or equal to the total axial length (L) of the metal tubular connecting component (1). T ), The metal tubular connecting component (1) is characterized in that the first end (2) has a first thickness (E1) of the wall (7), the second end (3) has a second thickness (E2) of the wall (7), and the transition thickness (W) satisfies the following mathematical formula: 1 × max (E1; E2) ≤ W≤ 1.5 × max (E1; E2) in: max (E1; E2) represents the maximum value selected from the first thickness (E1) and the second thickness (E2), and corresponds to the first thickness (E1) and the second thickness (E2) when the first thickness (E1) and the second thickness (E2) are equal.

2. The metal tubular connecting component (1) according to claim 1, characterized in that, The first end (2) has at least one first unthreaded portion (9), while the second end (3) has at least one second unthreaded portion (8).

3. The metal tubular connecting component (1) according to claim 2, characterized in that, The first unthreaded portion (9) transitions from the first inner transition plane (A) int The first unthreaded portion (l1) extends along the first unthreaded length (l1), while the second unthreaded portion (8) extends from the second inner transition plane (C). int It extends from the second unthreaded length (l2).

4. The metal tubular connecting component (1) according to any one of the preceding claims, characterized in that, The angles α1 and α2 relative to the axis of rotation (x) are both between 10° and 30°.

5. The metal tubular connecting component (1) according to any one of claims 1 to 3, characterized in that, Angles α1 and α2 make |α1-α2|≤5°.

6. The metal tubular connecting component (1) according to any one of claims 1 to 3, characterized in that, The wall (7) is produced, in whole or in part, by additive manufacturing.

7. The metal tubular connecting component (1) according to claim 5, characterized in that, Angles α1 and α2 make |α1-α2|≤2°.

8. A method for obtaining a metal tubular connecting member (1) according to any one of the preceding claims, characterized in that, The method includes at least: i. The step of producing all or part of the wall (7) by additive manufacturing, ii. Steps for machining the first end (2) and the second end (3).

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