Method and device for inspecting a threading of a tubular connection used in the oil industry

1. A device for inspecting a threading of a tubular component for exploration or working of hydrocarbon wells, the device comprising:

a threaded support that can cooperate by makeup with the threading of the tubular component;

means for blocking advance of the threaded support during makeup with the threading of the tubular component;

a longitudinal rail fixed to the means for blocking the advance of the threaded support and extending in a direction belonging to a plane passing through the axis of the threading of the threaded support;

means for inspecting the threading of the tubular component; and

means for longitudinal guidance to guide the means for inspecting the threading in translation along the longitudinal rail,

wherein the means for inspecting the threading of the tubular component comprises two arms, each including a first and a second end, the first ends being connected together by a deformable portion that allows an angular displacement between the second ends, the second ends each carrying a contact element, the inspection means further comprising means for determining the displacement.

2. An inspection device according to claim 1 , wherein the means for blocking the advance of the threaded support during makeup with the threading of the tubular component comprise an abutment fixed to the threaded support.

3. An inspection device according to claim 1 , wherein the means for blocking the advance of the threaded support during makeup with the threading of the tubular component comprises a threading of the threaded support, the threading being of axially tightening self-locking type.

4. An inspection device according to claim 1 , wherein the longitudinal rail extends in a direction parallel to the axis of the threading of the threaded support.

5. An inspection device according to claim 1 , wherein the longitudinal rail extends in a direction parallel to a taper of the threading of the threaded support.

6. An inspection device according to claim 1 , wherein the longitudinal guide means comprises a guide bearing that can slide in the longitudinal rail.

7. An inspection device according to claim 1 , further comprising radial guide means that can guide the threading inspection means in a direction perpendicular to and intersecting the axis of the threading of the threaded support.

8. An inspection device according to claim 7 , wherein the radial guide means comprises a guide bearing that can slide in a radial rail fixed to the longitudinal guide means.

9. An inspection device according to claim 7 , wherein the radial guide means comprises two parallel slats each fixed at first of their ends to the longitudinal guide means, a second end being fixed to the means for inspecting.

10. An inspection device according to claim 1 , further comprising means for determining a position of the means for inspecting the threading of the tubular component along the longitudinal rail.

11. An inspection device according to claim 10 , wherein the means for determining the position of the means for inspecting the threading comprises a graduation provided on the longitudinal rail.

12. An inspection device according to claim 10 , wherein the means for determining the position of the means for inspecting the threading includes a potentiometer comprising a graduation fixed to the longitudinal rail in a parallel manner and a cursor that can slide along the graduation.

13. An inspection device according to claim 1 , wherein a material constituting the support is selected from aluminium, bronze and polyamides, such that a surface of the threading of the support has high resistance to wear.

14. An inspection device according to claim 1 , wherein the means for inspecting the threading of the tubular component comprises a confocal sensor.

15. A method for inspecting a threading of a tubular component for exploration or working of hydrocarbon wells, comprising:

threading the threaded support of an inspection device in accordance with claim 1 , with the threading of the tubular component until progression of threading is blocked;

positioning the inspection means at a selected position along the longitudinal rail;

positioning the inspection means such that one of the contact elements of the device is in contact with a loading flank of the threading while the other contact element is in contact with a stabbing flank of the threading, the two contact elements being within the same thread root;

measuring the angular displacement; and

comparing the angular displacement measured previously with a reference value.

16. A method for inspecting a threading of a tubular component for the exploration or working of hydrocarbon wells, comprising:

making up the threaded support of an inspection device in accordance with claim 1 with the threading of the tubular component until progression of threading is blocked;

displacing the inspection means along the longitudinal rail; and

processing the data collected by the confocal sensor to establish a profile of the threading.

17. A device for inspecting a threading of a tubular component for exploration or working of hydrocarbon wells, the device comprising:

a threaded support that can cooperate by makeup with the threading of the tubular component;

means for blocking advance of the threaded support during makeup with the threading of the tubular component;

a longitudinal rail fixed to the means for blocking the advance of the threaded support and extending in a direction belonging to a plane passing through the axis of the threading of the threaded support;

means for inspecting the threading of the tubular component;

means for longitudinal guidance to guide the means for inspecting the threading in translation along the longitudinal rail;

radial guide means that can guide the threading inspection means in a direction perpendicular to and intersecting the axis of the threading of the threaded support; and

wherein the radial guide means comprises two parallel slats each fixed at first of their ends to the longitudinal guide means, a second end being fixed to the means for inspecting.