Metal tubular connecting part and method for obtaining such a part by additive manufacturing

Patent metadata

Field	Value
Publication number	US-12247680-B2
Application number	US-202118247297-A
Country	US
Kind code	B2
Filing date	Sep 24, 2021
Priority date	Oct 1, 2020
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A metal tubular connecting part includes a total axial length, an inner surface, and an outer surface. The inner and outer surfaces delimit a wall, an outer transition surface, and an inner transition surface. The outer transition surface and the inner transition surface delimit a transition thickness of the wall. A first threaded end is defined by a first outer surface portion extending over a first axial length. A second threaded end is defined by a second inner surface portion extending over a second axial length. The sum of the first axial length and the second axial length is less than or equal to the total axial length of the connecting part.

First claim

The invention claimed is:

1. A metal tubular connecting part having at least an axis of revolution and a total axial length, said connecting part comprising:
an inner surface and an outer surface, said inner surface and outer surface delimiting a wall,
at least a first outer transition plane and at least a second outer transition plane, both of said outer transition planes being orthogonal to the axis of revolution,
at least a first inner transition plane and at least a second inner transition plane, both of said inner transition planes being orthogonal to the axis of revolution,
an outer transition surface which has a frustoconical shape defined by an outer transition generatrix having an inclination of angle α 1 to the axis of revolution, said outer transition surface extending from the first outer transition plane as far as the second outer transition plane,
an inner transition surface which has a frustoconical shape defined by an inner transition generatrix having an inclination of angle α 2 to the axis of revolution, said inner transition surface extending from the first inner transition plane as far as the second inner transition plane, said outer transition surface and inner transition surface delimiting a transition thickness of the wall,
a first male or female threaded end, having a first end plane orthogonal to the axis of revolution, a first inner diameter and a first outer diameter, said first end being defined by a first inner surface portion having an inner diameter and extending from the first end plane as far as the first inner transition plane, and by a first outer surface portion having an outer diameter and extending over a first axial length from the first end plane as far as the first outer transition plane, said first inner surface portion having a substantially cylindrical shape defined by a first inner surface generatrix, and said first outer surface portion having a substantially cylindrical shape defined by a first outer surface generatrix,
a second male or female threaded end, having a second end plane orthogonal to the axis of revolution, a second inner diameter, and a second outer diameter, said second end being defined by a second inner surface portion having an inner diameter and extending over a second axial length from the second end plane as far as the second inner transition plane, and by a second outer surface portion having an outer diameter and extending from the second end plane as far as the second outer transition plane, said inner surface portion having a substantially cylindrical shape defined by a second inner surface generatrix, said second outer surface portion having a substantially cylindrical shape defined by a second outer surface generatrix,
wherein a sum of the first and second axial lengths is less than or equal to the total axial length of the connecting part, and
wherein the first end has a first thickness of the wall, the second end has a second thickness of the wall, and the transition thickness satisfies the following equation:
[Math]1×max( E 1; E 2)≤ W≤ 1.5×max( E 1; E 2)

where: max (E 1 ; E 2 ) represents the largest value selected from the first thickness and the second thickness, and corresponds to the first thickness and to the second thickness when the first thickness and the second thickness are equal, and W represents the transition thickness.

2. The connecting part according to claim 1 , wherein the first end has at least one first non-threaded part, and the second end has at least one second non-threaded part.

3. The connecting part according to claim 2 , wherein the first non-threaded part extends over a first non-threaded length from the first inner transition plane, and the second non-threaded part extends over a second non-threaded length from the second inner transition plane.

4. The connecting part according to claim 1 , wherein the angles α 1 and α 2 are both between 10° and 30° inclusive relative to the axis of revolution.

5. The connecting part according to claim 1 , wherein the angles α 1 and α 2 are such that |α 1 −α 2 |≤5°.

6. The connecting part according to claim 1 , wherein the angles α 1 and α 2 are such that |α 1 −α 2 |≤2°.

7. The connecting part according to claim 1 , wherein the wall is produced wholly or partially by additive manufacturing.

8. A method for obtaining the connecting part according to claim 1 , said method comprising:
producing the wall wholly or partially by additive manufacturing, and
machining the first and second ends.

Assignees

• Vallourec Oil & Gas France

Inventors

• Maillon Bertrand
• Noel Alexandre
• Taisne Thierry
• Caruso Umberto

Classifications

• F16L25/14

  Joints for pipes of different diameters or cross-section · CPC title

• F16L15/007

  with more than one threaded section · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• Y02P10/25

  Process efficiency · CPC title

• E21B17/02

  Couplings; joints {(expandable couplings or joints E21B43/106)} · CPC title