THREADED CONNECTION FOR EXPLORATION AND PRODUCTION OF A HYDROCARBON WELL

Abstract

A threaded connection for exploration and production of a hydrocarbon well, said threaded connection comprising a pin comprising an external pin surface provided with an external thread, a housing comprising an internal housing surface provided with an internal thread to engage with the external thread during rotational tightening of the threaded connection, and an anti-rotation device permitting relative rotation between the pin and the housing in an tightening rotation direction and preventing relative rotation between the pin and the housing in a loosening rotation direction, wherein the pin and the housing extend along a longitudinal axis, the anti-rotation device comprising a first releaseable anti-rotation member arranged in a first radial recess provided in an external pin surface, in the pin and the internal housing surface, in the housing.and the second anti-rotation member is provided on the other outer surface of the pin, on the pin, and the inner surface of the housing, on the housing.

Description

THREADED CONNECTION FOR EXPLORATION AND PRODUCTION OF A HYDROCARBON WELL FIELD OF INVENTION The invention relates to a threaded connection for exploration and production of a hydrocarbon well. The threaded connection comprises a pin including an external pin surface provided with an external thread, a housing comprising an internal housing surface with an internal thread to match the external thread during rotational adjustment of the threaded connection, and an anti-rotation device that permits relative rotation between the pin and the housing in an adjusting rotation direction and prevents relative rotation between the pin and the housing in an unscrewing rotation direction. The first anti-rotation member comprises a first ratchet part provided with first teeth extending radially, and the second anti-rotation member comprises a second ratchet part provided with second ratchet teeth that engage with the first ratchet teeth of the first anti-rotation member in the final adjustment of the threaded connection. QQonnn / eznz / E / YiAi Spring means are provided that allow radial movement of the first part of the ratchet in a radial direction with respect to the longitudinal axis of the threaded connection when the first ratchet teeth slide over the second 5 ratchet teeth, during relative rotation between the pin and the housing in the adjustment rotation direction. Generally, the pin and the socket of the threaded connection are formed in the end sections of longitudinal tubular members suitable for conveying a medium such as a gas or liquid. For the exploration and production of a hydrocarbon well, the end sections of such tubular members are connected together to form a string of tubular members for conveying said medium. Such a tubular member may have a pin in its end section and another pin in the opposite end section. Alternatively, such a tubular member may have a pin in its end section and a socket in the opposite end section. It is also possible for such a tubular member to be provided with a socket in the end section of said tubular member and with another socket in the end section of said tubular member. BACKGROUND OF THE INVENTION This type of anti-rotation device has a first anti-rotation member provided with the first part of QQonnn / eznz / E / YiAi ratchet, the second anti-rotation member provided with the second ratchet part, and the spring means allows the anti-rotation device to be activated by rotating the threaded connection until the final adjustment is reached. SUMMARY OF THE INVENTION Common threaded connections have the disadvantage that the anti-rotation device is susceptible to damage. Damage can occur when the anti-rotation device is subjected to forces, for example, during the twisting of the threaded connection, and when relative rotation between the pin and the housing is impeded in the unscrewing direction. BRIEF DESCRIPTION OF THE INVENTION The invention aims to provide an improved, or at least alternative, threaded connection 15 for the exploration and production of a hydrocarbon well. This threaded connection comprises: - a pin comprising an external pin surface provided with an external thread, - a housing comprising an internal housing surface provided with an internal thread to engage with the external thread during rotary adjustment of the threaded connection, and QQonnn / eznz / E / YiAi - an anti-rotation device that allows relative rotation between the pin and the housing in an adjusting rotation direction and prevents relative rotation between the pin and the housing in an opposite unscrewing rotation direction, where: -- the pin and the housing extend along a longitudinal axis, - - the anti-rotation device comprises a first anti-rotation member mounted so as to be releaseable, which is arranged in a first radial recess provided on one of the outer pin surface and the inner housing surface, and the second anti-rotation member is provided on the other outer pin surface and the inner housing surface, - the first anti-rotation member comprises a first ratchet portion provided with first radially extended ratchet teeth, — the second anti-rotation member comprises a second ratchet part provided with radially extended second ratchet teeth that engage with the first ratchet teeth 20 of the first anti-rotation member in the final adjustment of the threaded connection, — the first anti-rotation member comprises a spring part that permits radial movement of the first ratchet part in a radial direction with respect to the longitudinal axis when the first ratchet teeth slide over the second ratchet teeth during relative rotation between the pin and the housing in the adjustment rotation direction 5, and - - the first part of the ratchet and the spring part of the first anti-rotation member are formed in one piece. By providing a threaded connection for hydrocarbon well exploration and production, where the first ratchet part 10 and the spring portion of the first anti-rotation member are formed as a single piece, a relatively robust anti-rotation device can be provided. Since the first ratchet part and the spring portion are formed from a single piece of material, a homogeneous anti-rotation member 15 is provided. This homogeneous anti-rotation member provides a strong material connection between the first ratchet part and the spring portion. In this way, the device is less susceptible to damage, thus providing a relatively robust anti-rotation device 20. Put another way, since the first ratchet part and the spring part are formed from a single piece of material, the first anti-rotation member can be free of components of QQonnn / eznz / E / YiAi connection, e.g., a screw connecting the first part of the ratchet to the spring part. This invention is based, among other things, on the knowledge that such connecting components can be particularly susceptible to material deformations caused by shear stresses, especially when the first anti-rotation member is subjected to a relatively large torque for unscrewing. By omitting such connecting components, damage to the connecting components can be prevented. In one embodiment of the threaded connection according to the invention, the spring portion has a spring stiffness lower than the ratchet stiffness of the first ratchet portion. The spring portion may have a cross-section with a radial spring thickness smaller than the radial thickness of the first ratchet portion of the first ratchet portion. In one embodiment of the threaded connection according to the invention, the first anti-rotation member comprises a first mounting part for mounting so that the first anti-rotation member can be released in the first radial recess 1. In one embodiment of the threaded connection according to the invention, the first assembly part comprises a first QQonnn / rznz / E / YiAi / mounting through the hole to receive a first mounting member, such as a first screw, which mounts in such a way that the first anti-rotation member can be released with said pin and with the box where the first radial hole 5 is provided. In one embodiment of the threaded connection according to the invention, the first ratchet part, the spring part of the first mounting part of the first anti-rotation member are formed in one piece. In one embodiment of the threaded connection according to the invention, the spring portion has a spring stiffness less than the ratchet stiffness of the first ratchet portion and / or less than the first mounting stiffness of the first mounting portion. The spring portion may have a section with a radial spring thickness smaller than the first radial ratchet thickness of the first ratchet portion and / or smaller than the first radial mounting thickness of the first mounting portion. In one embodiment of the threaded connection according to the invention, a first contact surface is provided between the pin hole and the housing where the first radial hole is provided. This surface defines a first boundary of the first radial hole. The first member) antiQQonnn / eznz / E / YiAi rotation comprises a first contact surface with the member facing the first contact surface of the hole.and the first part of the assembly is configured to allow tangential movement in the tangential direction with respect to the 5 longitudinal axis of the first anti-rotation member in the first radial hole from a tangential position of the first member where the contact surface of the first anti-rotation member is in contact with the first contact surface of the hole to a second tangential position of the member where the contact surface of the first anti-rotation member is located at a first tangential distance of the member from the first contact surface of the hole and vice versa. The above has the advantage that the anti-rotation device may be even less susceptible to damage. Since the first mounting part is configured to allow tangential movement (e.g., sliding movement) of the first anti-rotation member from its tangential position to its second tangential position, material stresses can be directed outward from the first mounting part (and toward a first mounting member, e.g., a screw, provided in the mounting part) where there are relatively fewer stresses in the first mounting part. In this way, the first mounting part can QQonnn / eznz / E / YiAi be substantially stress-free. In particular, said anti-rotation device may be configured to allow said first contact surface of the recess and said contact surface of the first member to splice together, while said teeth limit the rotation of the pin with respect to the housing in the unscrewing direction. In this way, relatively few connecting parts (e.g., said first mounting part) remain under stress when unscrewing. Tangential motion in the tangential direction is not restricted to motion tangential to the longitudinal axis. It can have a degree of motion in other directions relative to the longitudinal axis, for example, to create motion partially around the axis. 1o ngit ud in a1. In one embodiment of the threaded connection according to the invention, the first contact surface of the recess and the contact surface of the first member are configured to distribute the forces resulting from a torque for unscrewing applied to the pin and the housing in the unscrewing rotation direction, mainly through the teeth of the first part of the ratchet and the second part of the ratchet. QQonnn / eznz / E / YiAi In one embodiment of the threaded connection according to the invention, the first contact surface of the recess and the contact surface of the first member are configured to direct (e.g., guide) forces from the first 5 ratchet teeth of the first part of the ratchet to the second ratchet teeth of the second part of the ratchet and / or from the second ratchet teeth of the second part of the ratchet to the first ratchet teeth of the first part of the ratchet. In one embodiment of the threaded connection according to the invention, the contact surface of the hole faces the first part of the ratchet. In one embodiment of the threaded connection according to the invention, the first contact surface of the hole 15 faces the first part of the ratchet and the second part of the ratchet. In one embodiment of the threaded connection according to the invention, the second anti-rotation member is configured to push the first anti-rotation member into the second tangential position of the member when an adjusting tong is applied to the pin and housing in the adjusting rotation direction, and into the tangential position of the first QQonnn / eznz / E / YiAi member when a predetermined unscrewing torque is applied to the pin and housing in rotation to unscrew. In one embodiment of the threaded connection according to the invention, the second ratchet teeth, which engage with the first ratchet teeth, push the first anti-rotation member into the second member position when a predetermined tightening tong is applied, and into the first tangential member position when the predetermined loosening tong is applied. In one embodiment of the threaded connection according to the invention, the first contact surface of the recess and the contact surface of the first member are configured to create a radial counterforce. The ratchet teeth act against the radial movement of the first part of the ratchet in a radial relative direction with respect to the longitudinal axis when the first anti-rotation member is located in the first tangential position of the member and an unscrewing torque is applied to the pin and the housing in the direction of rotation to unscrew. In one embodiment of the threaded connection according to the inventor, the radial counterforce is formed by a frictional force between the first contact surface of the hole, and the first contact surface of the member when QQonnn / eznz / E / YiAi An unscrewing torque is applied to the pin and housing in the unscrewing rotation direction. In one embodiment of the threaded connection according to the invention, the first through-hole mounting portion is in a direction tangential to the longitudinal axis which is larger than a first through-hole mounting portion of the first mounting member surrounded by the first through-hole mounting to allow movement of the first anti-rotation member in the tangential direction relative to the first mounting member 10. In one embodiment of the threaded connection according to the invention, the first through-hole assembly has an elongated shape in a tangential direction with respect to the longitudinal axis or a circular shape. In one embodiment of the threaded connection according to the invention, the first contact surface of the recess and the contact surface of the first member are configured to block the movement of the first member from rotation beyond the tangential position of the first member when a loosening tong is applied to the pin and housing in rotation to loosen. In one embodiment of the threaded connection according to the invention, the first through-hole assembly has QQonnn / eznz / E / YiAi the dimensions to avoid forces in the tangential direction working on the first mounting member by locating the first anti-rotation member in the first tangential position of the member when an unscrewing torque 5 is applied to the pin and housing in the unscrewing rotation. In one embodiment of the threaded connection according to the invention, the first tangential member allows radial movement of the first ratchet part in a radial direction relative to the longitudinal axis 10 when the first ratchet teeth slide along the second ratchet teeth during relative rotation between the pin and the housing in the adjustment rotation direction. In one embodiment of the threaded connection according to the invention, the first mounting part comprises a first sliding mounting surface that surrounds the first through-hole assembly and is in contact with a corresponding first sliding recess surface provided in the first radial recess to facilitate tangential movement of the first anti-rotation member from the first tangential position 20 of the member to the second tangential position and vice versa. In one embodiment of the threaded connection according to the invention, the spring portion of the first anti-rotation member is in a tangential direction with respect to the longitudinal axis located between the first ratchet portion and the first mounting portion. In one embodiment of the threaded connection according to the invention, the contact surface of the first member 5 of the first anti-rotation member is located in the first part of the ratchet and the first ratchet teeth are in a tangential direction with respect to the longitudinal axis located between the contact surface of the first member and the spring part. In one embodiment of the threaded connection according to the invention, a first radial thickness of the ratchet of the first ratchet part increases in the tangential direction with respect to the longitudinal axis located from the spring part towards the contact surface of the first member. In one embodiment of the threaded connection according to the invention, the first anti-rotation member is mounted only on one of the pins and the housing where the first radial hole is provided by the first mounting part. In one embodiment of the threaded connection according to the invention, the first anti-rotation member comprises one, and only one, first mounting part. In particular, said first anti-rotation member comprises a single mounting part. Even more particularly, said first member of The anti-rotation member comprises, at one end, said first mounting part and, at the other end, opposite said end, said first ratchet part, wherein said first ratchet part is a free end of said first anti-rotation member. In this way, said first ratchet part is free of mounting elements. Accordingly, said first anti-rotation member can be arranged as a cantilever beam. In one embodiment of the threaded connection according to the invention, the first anti-rotation member comprises one, and only one, first spring portion. Particularly, said spring portion begins at said first mounting portion and terminates at said first ratchet portion. In this way, said spring portion is (substantially) located between said mounting portion and said ratchet portion. Even more particularly, said first anti-rotation member comprises said first mounting portion at said end, and said first ratchet portion at the other end, wherein said spring portion is (substantially) located between said mounting portion and said first ratchet portion. In this way, a flexible cantilever beam is provided. In one embodiment of the threaded connection according to the invention, the second ratchet part of the second The QQonnn / eznz / E / YiAi anti-rotation member is fixed in the radial direction with respect to the longitudinal axis. In one embodiment of the threaded connection according to the invention, the second anti-rotation member 5 is mounted so that it can be released, in the second radial recess provided on the other outer surface of the pin in the pin and the inner surface of the housing in the housing. In one embodiment of the threaded connection according to the invention, the first anti-rotation member is arranged 10 in the first radial recess provided on the outer surface of the pin, on the pin, and the second anti-rotation member is provided on the inner surface of the box, on the box. This form has the advantage of providing a relatively robust and durable threaded connection. By locating the first anti-rotation member on the pin, the first anti-rotation member can remain within the external dimensions of the threaded connection, even when it is pushed outward radially from the longitudinal axis of the threaded connection. In other words, the first anti-rotation member can be positioned where its radial movement will not cause it to become deformed. The anti-rotation member extends radially outward beyond the diameter of the housing. The external diameter of the threaded connection can be defined by the external dimensions of the housing in the radial direction with respect to the longitudinal axis of the housing. Furthermore, the mounting elements 5 for attaching the first anti-rotation member to the pin are also kept within the external dimensions of the connection. In this way, the mounting elements will not extend radially beyond the outer diameter of the housing. Furthermore, with the first anti-rotation member accommodated in the pin, the moving components (e.g., the spring part) are generally less exposed to environmental influences (e.g., a dirty environment in a pit). In one embodiment of the threaded connection according to the invention, the second anti-rotation member is mounted 15 so that it can be released, in a second radial recess provided on the inner surface of the case, in the case. In one embodiment of the threaded connection according to the invention, the second radial hole comprises a second hole through an orifice where the second part 20 of the ratchet of the second anti-rotation member is located. In one embodiment of the threaded connection according to the invention, the second anti-rotation member comprises, at QQonnn / eznz / E / YiAi less, a second mounting part to mount so that it can be released, the second anti-rotation member in the box. In one embodiment of the threaded connection according to the invention, the box comprises an external surface of the box and at least a second, releaseable mounting part mounted on the box over the external surface of the box. In one embodiment of the threaded connection according to the invention, the second anti-rotation member 10 comprises two second mounting parts for mounting so that the second anti-rotation member can be released in the housing. In one embodiment of the threaded connection according to the invention, the two second mounting parts are located on opposite sides of the second radial hole. In one embodiment of the threaded connection according to the invention, the first anti-rotation member is arranged in the first radial recess provided on the inner surface of the housing, and the second anti-rotation member is provided on the outer surface of the pin, on the pin. In one embodiment of the threaded connection according to the invention, the second anti-rotation member is mounted so that it can be released from the pin in a second radial recess provided on the outer surface of the pin. QQonnn / eznz / E / YiAi In one embodiment of the threaded connection according to the invention, the first radial hole comprises a first hole through an orifice where the first part of the ratchet of the first anti-rotation member is located. In one embodiment of the threaded connection according to the invention, the first anti-rotation member comprises at least a first mounting part for mounting so that the first anti-rotation member can be released in the housing. In one embodiment of the threaded connection according to the invention, the box comprises an external surface of the box and, at least, the first mounting part is mounted so that it can be released onto the external surface of the box. In one embodiment of the threaded connection according to the invention, the first anti-rotation member comprises two first mounting parts for mounting so that the first anti-rotation member can be released in the housing. In one embodiment of the threaded connection according to 20 of the invention, the two second mounting parts are located on opposite sides of the second radial hole. In one embodiment of the threaded connection according to the invention, the first anti-rotation member comprises two QQonnn / eznz / E / YiAi spring parts that together allow radial movement of the first part of the ratchet in a radial direction with respect to the longitudinal axis when the first ratchet teeth slide over the second ratchet teeth during the 5 relative rotation between the pin and the case in the direction of adjustment rotation. In one embodiment of the threaded connection according to the invention, each of the spring parts is located between the first ratchet part, and a different part of the first two mounting parts. In one embodiment of the threaded connection according to the invention, each of the spring parts has a variable spring thickness, such as two radially tapered sections. Specifically, the radial spring thickness of the spring parts may be less than the first radial ratchet thickness of the first ratchet part and / or the first radial mounting thickness of the first mounting parts. In one embodiment of the threaded connection according to the invention, the anti-rotation member is configured to be activated by a relative rotation between the pin and the housing in the adjustment rotation direction until the final adjustment of the threaded connection is reached. ααοηηη / Γζηζ / Ε / γίΛΐ In one embodiment of the threaded connection according to the invention, the first ratchet teeth and the second ratchet teeth extend in opposite radial directions with respect to the longitudinal axis when they engage with each other in the final tightening of the threaded connection. In one embodiment of the threaded connection according to the invention, the first radial hole extends along part of the circumference of said external pin surface, and the internal surface of the housing in the housing. In one embodiment of the threaded connection according to the invention, the second hole extends along part of the circumference of said external pin surface, and the internal surface of the housing, in the housing. In one embodiment of the threaded connection according to 15 of the invention, the relative radial movement of the longitudinal axis of the first ratchet part moves the first ratchet teeth radially with respect to the second ratchet teeth. It will be evident to the person skilled in the art that the threaded connection 20 according to the invention may comprise the characteristics of any of the combinations of the embodiments of threaded connections described above. QQonnn / eznz / E / YiAi according to the invention. The invention also relates to a method for manufacturing a threaded connection for exploration and production of a hydrocarbon well, comprising the step of activating the anti-rotation device of the threaded connection according to the invention, 5 by means of a relative rotation between the pin and the box in the direction of adjustment rotation until the final adjustment of the threaded connection is reached. The invention further relates to an anti-rotation device for a threaded connection for exploration and production of a hydrocarbon well, said threaded connection comprising a pin comprising an external pin surface provided with an external thread, and a housing comprising an internal housing surface provided with an internal thread to engage with the external thread during rotational tightening of the threaded connection, the pin and housing extending along a longitudinal axis, and where: - the anti-rotation device is configured to permit relative rotation between the pin and the housing in an adjusting rotation direction and to prevent relative rotation between the pin and the housing in an opposite unscrewing rotation direction, — the anti-rotation device comprises a first anti-rotation member mounted so as to be releaseable which is QQonnn / eznz / E / YiAi arranged in a first radial hole provided on one of: the outer surface of the pin and the inner surface of the box in the box, and the second anti-rotation member is provided on the other outer surface of the pin and the inner surface of the box in the box, - - the first anti-rotation member comprises a first ratchet part provided with first radially extended ratchet teeth, — and the second anti-rotation member comprises a second ratchet portion provided with radially extended second ratchet teeth that engage with the first ratchet teeth of the first anti-rotation member in the final adjustment of the threaded connection, — the first anti-rotation member comprises a spring portion that permits radial movement of the first ratchet portion in a radial direction with respect to the longitudinal axis when the first ratchet teeth slide over the second ratchet teeth during relative rotation between the pin and the housing in the upward adjustment rotation direction, and - - the first part of the ratchet and the spring part of the first anti-rotation member are formed in one piece. QQonnn / eznz / E / YiAi It will be evident to the person skilled in the art that the anti-rotation device according to the invention may comprise the anti-rotation device-related features of any of the combinations of the 5 embodiments described above of threaded connections according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS The embodiments of the threaded connection, the anti-rotation device, and the method according to the invention will be described only by way of example, with reference to the accompanying schematic drawings in which the corresponding reference symbols indicate corresponding parts and in which: Figure 1 schematically shows a perspective view of one embodiment of the threaded connection according to the invention, at the start of the rotary adjustment of the threaded connection, Figure 2 schematically shows a perspective view of one embodiment of the threaded connection of Figure 1 in the final adjustment of the threaded connection; Figures 3A and 3B schematically show perspective views of the first anti-rotation member of the anti-rotation device of the threaded connection of Figure 1. QQonnn / rznz / E / YiAi Figure 3C schematically shows a top view of the first anti-rotation member of Figure 3A, Figure 3D schematically shows a side view of the first anti-rotation member of Figure 3A, Figure 3E schematically shows a bottom view of the first anti-rotation member of Figure 3A; Figures 4A and 4B schematically show perspective views of the second anti-rotation member of the anti-rotation device of the threaded connection of Figure 1; Figure 4C schematically shows a top view of the second anti-rotation member of Figure 4A; Figure 4D schematically shows a side view of the second anti-rotation member of Figure 4A; Figure 4E schematically shows a bottom view of the second anti-rotation member of Figure 4A; Figure 5 schematically shows an exploded perspective view of the first anti-rotation member and the first radial hole provided in the pin of the threaded connection of Figure 1; Figure 6A schematically shows a perspective view of the first anti-rotation member arranged in the first radial hole provided in the pin of the threaded connection of Figure 1.Figure 6B schematically shows a top view of Figure 6A, Figure 6C schematically shows a side view of Figure 6A, Figure 7 schematically shows an exploded perspective view of the second anti-rotation member and the second radial hole provided in the threaded connection box of Figure 1, Figure 8 schematically shows a perspective view of the second anti-rotation member arranged in the second radial hole provided in the threaded connection box of Figure 1, Figure 9A schematically shows another perspective view of the second anti-rotation member arranged in the second radial hole provided in the threaded connection box of Figure 1, Figure 9B schematically shows a top view of Figure 9A, Figure 9C schematically shows a side view of Figure 9A,Figure 10 schematically shows a perspective view of the first anti-rotation member arranged in the first radial hole and provided in the pin and of the second anti-rotation member arranged in the second radial hole provided in the threaded connection housing of Figure 1. Figures 11A to 11G schematically show cross-sectional views of part of the threaded connection of Figure 1 where the anti-rotation device is activated by rotating the threaded connection until the final fit is reached. Figure 12 schematically shows a cross-sectional view of part of the threaded connection of Figure 1 in the final fit, indicating a finite element analysis in a situation where an unscrewing torque is applied to the pin and housing in the unscrewing rotation direction.Figures 13A to 13D schematically show views of the first anti-rotation member of an alternative embodiment of the threaded connection according to the invention; Figures 14A and 14B schematically show views of the first radial hole provided in the housing of the alternative embodiment of the threaded connection of Figures 13A to 13D; Figures 15A and 15B schematically show views of the first anti-rotation member of Figures 13A to 13D arranged in the first radial hole of Figures 14A and 14B; Figure 16 schematically shows a view of the second anti-rotation member of the alternative embodiment of the threaded connection of Figures 13A to 13D. QQonnn / eznz / E / YiAi Figure 17 schematically shows a view of the second radial hole provided in the pin of the alternative embodiment of the threaded connection of Figure 13A to 13D, and Figure 18 schematically shows a view of the second anti-rotation member of Figure 16 arranged in the first radial hole of Figure 17. DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows a perspective view of one embodiment of the threaded connection 1 according to the invention, 10 at the start of the rotary adjustment of the threaded connection 1. Figure 2 shows threaded connection 1 from Figure 1 in final adjustment 20 of threaded connection 1. Threaded connection 1 is configured for exploration and production of a hydrocarbon well. The threaded connection 1 comprises a pin 2 comprising an external pin surface 3 provided with an external thread 4, a housing 5 comprising an internal housing surface 6 provided with an internal thread 7 to match the external thread 4 during the rotary adjustment of the threaded connection 1. Pin 2 and box 5 extend along a longitudinal axis 11. Said longitudinal axis 11 is aligned with the axially extended central axis of the tubular members comprising box 5 and pin 2. QQonnn / eznz / E / YiAi An anti-rotation device 8 is provided that permits relative rotation between pin 2 and housing 5 in an adjusting rotation direction 9 and prevents relative rotation between pin 2 and housing 5 in an opposite loosening rotation direction 5 10. Relative rotation between pin 2 and housing 5 in the adjusting rotation direction 9 is induced by applying an adjusting torque 34 to pin 2 and housing 5 in the adjusting rotation direction. Relative rotation between pin 2 and housing 5 in the loosening rotation direction 10 (which is prevented by the anti-rotation device 8) is induced by applying a loosening torque 35 to pin 2 and housing 5 in the loosening rotation direction 10. Figure 1 shows the situation where the housing 5 is static and pin 2 is rotated in the tightening direction 9 as a result of an adjusting torque 34 applied to pin 2. Figure 2 shows the situation where the housing 5 is static and an unscrewing torque 35 is applied to pin 2. Rotation of pin 2 in the unscrewing rotation direction 10 is prevented by the anti-rotation device 8. Figures 11A to 11G show cross-sectional views of the threaded connection 1 of Figure 1 where the anti-rotation device 8 is activated by rotating the threaded connection 1 to the final setting 20. Figure 12 shows a cross-sectional view of a portion of the threaded connection 1 of Figure 1 at the final setting 20, indicating a finite element analysis in the situation where an adjusting torque 35 is applied to the pin 2 and the housing 5 in the unscrewing rotation direction 5 10. The first ratchet teeth 17 of the second ratchet teeth 19 extend in opposite radial directions 23 with respect to the longitudinal axis 11 when they otherwise engage with each other at the final setting 20 of the threaded connection. Relative rotation between pin 10 2 and box 5 in the unscrewing rotation direction 10 in Figure 12 is prevented by the anti-rotation device 8. The anti-rotation device 8 comprises a first anti-rotation member mounted so as to be released 12, which is arranged in a first radial recess 13 provided on the outer surface 15 of pin 3 of pin 2, and a second anti-rotation member 14 provided on the inner surface of the housing 6 of the housing 5. In another embodiment of the threaded connection 1 according to the invention, the first anti-rotation member 12 is arranged in a first radial recess 13 provided on the inner surface of the housing 6 of the housing 5, and the second anti-rotation member 14 is provided on the inner surface of pin 3 of pin 2. QQonnn / eznz / E / YiAi The anti-rotation device 8 comprises multiple first anti-rotation members 12 and multiple second anti-rotation members 14. The location of the first anti-rotation members 12 and the second anti-rotation members 14 are shown in Figures 1 and 2, indicated by arrows A and B, respectively. The first anti-rotation member 12 comprises a first ratchet portion 16 provided with radially extended first ratchet teeth 17. The second anti-rotation member 14 comprises a second ratchet portion 18 provided with radially extended second ratchet teeth 19 that engage with the first ratchet teeth 17 of the first anti-rotation member 12 at the final adjustment 20 of the threaded connection 1. In particular, the first ratchet teeth 17 and the second ratchet teeth 19 are of the same zigzag type, wherein the first ratchet teeth 17 of the second ratchet teeth 19 are arranged to permit rotation of the pin 2 and the housing 5 in the tightening rotation direction 9 and to limit rotation of the pin 2 with respect to the housing 5 in the loosening rotation direction 10.Even more specifically, the zigzag teeth of the first and second ratchet teeth 17, 19 are negatively inclined (slightly). The first anti-rotation member. QQonnn / eznz / E / YiAi comprises a spring part 21 that allows radial movement of the first part of the ratchet 16 in a radial relative direction 23 with respect to the longitudinal axis 11 when the first ratchet teeth 17 slide along the second ratchet teeth 19 during relative rotation between the pin 2 and the housing 5 in the adjustment rotation direction 9. The relative radial movement of the longitudinal axis 11 of the first part of the ratchet 16 moves the first ratchet teeth 17 radially with respect to the second ratchet teeth 19. The first ratchet portion 16 and the spring portion 21 of the first anti-rotation member 12 are formed as a single piece. By providing a threaded connection 1 for exploration and production of a hydrocarbon well, where said first ratchet portion 15 and the spring portion 21 of said first anti-rotation member 12 are formed as a single piece, a relatively robust anti-rotation device 8 can be provided. Since said first ratchet portion 16 and said spring portion 21 are formed as a single piece of material, a homogeneous anti-rotation member 20 is provided. This anti-rotation member can provide a strong material connection with the material between said first ratchet portion 16 and said spring portion 21. In this way, said device can be less QQonnn / eznz / E / YiAi susceptible to damage and, a relatively robust anti-rotation device 8 can be provided. The second part of the pawl 18 is longer than the first part of the pawl 16. The teeth 19 of the second part of the pawl 18 extend over a greater length than the teeth 17 of the first part of the pawl 16. In particular, the second part of the pawl 18 has more teeth 19 than the first part of the pawl 16. Since the first ratchet part 16 and the spring part 21 are formed from a single piece of material, the first anti-rotation member 12 can be free of connecting components, e.g., a screw connecting the first ratchet part 16 to the spring part 21. This invention is based, among other things, on the knowledge that such connecting components can be particularly susceptible to material deformation caused by shear stresses, especially when the first anti-rotation member 12 is subjected to a relatively large torque 35 for unscrewing. By omitting such connecting components, damage to the connecting components can be prevented. Figures 3A to 3E show views of the first anti-rotation member 12 of the anti-rotation device 8 of the threaded connection 1 in Figure 1. The first anti-rotation member 12 QQonnn / eznz / E / YiAi comprises a first mounting part 24 for mounting so as to be released, the first anti-rotation member 12 in the first radial recess 13. The first anti-rotation member further comprises the first ratchet part 16, and the spring part 5 21. The first mounting part 24, the first ratchet part 16, and the first spring part 21 of the first anti-rotation member 12, are formed in one piece. The first radial hole 13 extends along part of the circumference of pin 47 of the outer surface of pin 3, of pin 10 2. The first part of the pawl 16 is wedge-shaped. In particular, the first part of the pawl 16 has a cross-section that is substantially wedge-shaped. This wedge shape has a relatively broad base that forms the contact surface of the first member 29 and converges toward the spring portion 21 of the first anti-rotation member 12. The first pawl teeth 17 are provided on an outer surface of the first part of the pawl 16. These first pawl teeth 17 extend between the contact surface of the first member 29 and the spring portion 21. The first pawl teeth 17 have a zigzag profile. The contact surface of the first member 29 is provided adjacent to the first ratchet teeth 17. Said first QQonnn / eznz / E / YiAi The surface of member 29 extends at an angle between 45 - 80 degrees with respect to a plane defined by said first ratchet teeth 17. Spring part 21 is located between the first ratchet part 16 and the first mounting part 24. Spring part 21 is shaped like an elongated plate. Spring part 21 has a relatively smaller thickness compared to the first ratchet part 16 and the first mounting part 24. Accordingly, spring part 21 has a lower stiffness than the first ratchet part 16 and the first mounting part 24. The first mounting part 24 is located further away from the first ratchet part 16 than the spring part 21. This first mounting part 24 comprises a first elongated mounting 15 through the hole 25 and has a first radial mounting thickness 52 that is greater than the first radial spring thickness 51 of the spring part 21. In this way, this first mounting part 24 has a relatively high rigidity compared to the spring part 21. Figure 5 shows an exploded view of the first anti-rotation member 12 and the first radial hole 13 provided in the pin 2 of the threaded connection 1 of Figure 1, and Figures 6A to 6C show views of the first anti-rotation member 12 arranged in QQonnn / eznz / E / YiAi the first radial hole 13. The first mounting part 24 comprises a first through-hole mounting 25 prepared to receive a first mounting member 26 such as, for example, a first screw, which mounts so that the first anti-rotation member 12 can be released to pin 2. QQonnn / eznz / E / YiAi A first contact surface of the hole 27 of pin 2 defines a first limit of the hole 28 of the first radial hole 13. The first anti-rotation member 12 comprises a contact surface 10 of the first member 29 facing the first contact surface of the hole 27.The first assembly part 24 is configured to allow tangential movement in a tangential direction 15 with respect to the longitudinal axis 11 of the first anti-rotation member 12 in the first radial recess 13 15 from a tangential position of the first member 31 where the contact surface of the first member 29 belonging to the first anti-rotation member 12 is in contact with the first contact surface of the recess 27 in a second tangential position of member 32 where the contact surface of the first member 29 belonging to the first anti-rotation member 12 is located at a first tangential distance of member 33 from the first contact surface of the recess 27 and vice versa. This is also shown in Figures 11I to 11G and 12. The above has the advantage that the anti-rotation device may be even less susceptible to damage. As the first mounting part 24 is configured to allow tangential movement (e.g., allowing the sliding movement) of the first anti-rotation member 12 from said tangential position of the first member 25 to 31 to said second tangential position of member 32, and said first contact surface of the recess 27 and said contact surface of the first member 29 are configured to direct the resulting forces of an unscrewing tong 35 applied to the pin 2 and the housing 5 in the unscrewing rotation direction 10 mainly through the teeth of the first part of the ratchet 16 and the second part of the ratchet 18, the stresses in the material can be directed outwards from said first mounting part 24 (and a first mounting member 26, for example, a screw, provided in said first mounting part 24), where there are relatively few stresses in said first mounting part 24. In this way, said first mounting part 24 can be substantially stress-free. In particular, said anti-rotation device 8 can be configured to allow splicing of said first surface QQonnn / eznz / E / YiAi of contact of the hole 27 and said contact surface of the first member 29 and limit the rotation of the pin 2 with respect to the box 5 in the direction of rotation for unscrewing 35. In this way, relatively few 5 connecting parts are subjected to stresses (e.g., said first mounting part 24 may be under the influence of a tong for unscrewing 35. Tangential motion in the tangential direction 15 is not necessarily restricted only to motion in a tangential direction 15 with respect to the longitudinal axis 11. It can have a certain degree of motion in other directions with respect to the longitudinal axis 11, for example, to create a motion partly around the longitudinal axis 11. The first contact surface of the gap 27 and the contact surface of the first member 29 are configured to distribute the forces resulting from the applied unscrewing torque to the pin 2 and the box 5 in the unscrewing rotation direction mainly through the teeth of the first part of the ratchet 16 and the second part of the ratchet 18. The second anti-rotation member 14 is configured to push the first anti-rotation member 12 into the second tangential member position 32 when a predetermined setting torque 34 is applied to pin 2 and housing 5 in the direction of QQonnn / eznz / E / YiAi adjustment rotation 9, and into the first tangential position of member 31 when a predetermined loosening torque 35 is applied to pin 2 and housing 5 in the loosening rotation direction 10. The second teeth 5 of the ratchet 19, engaging with the first teeth of the ratchet 17, push the first anti-rotation member 12 into the second tangential position of member 32 when a predetermined adjustment torque 34 is applied, and into the first tangential position of member 31 when a loosening torque 35 is applied. The first contact surface of the recess 27 and the contact surface of the first member 29 are configured to create a radial counterforce 36 acting against the radial movement of the first part of the ratchet 16 in a radial direction 15 relative to the longitudinal axis 11 when the first anti-rotation member 12 is located in the first tangential position of member 31 and an adjusting torque 35 is applied to pin 2 and housing 5 in the unscrewing rotation direction 10. The radial counterforce 36 is formed by a frictional force 37 between the first contact surface of the recess 27 and the first contact surface of member 29 when an unscrewing torque 35 is applied to pin 2 and the QQonnn / eznz / E / YiAi box 5 in the unscrewing rotation direction 10. See, among others, Figure 12. The first through-hole assembly 25 is in a tangential direction with respect to the longitudinal axis 11 longer than a first mounting portion 38 of the first mounting member 26 surrounded by the first through-hole assembly 25 to allow movement of the first anti-rotation member 12 in the tangential direction and with respect to the first mounting member 26. The first through-hole assembly 25 has an elongated shape 39 in a tangential direction with respect to the longitudinal axis 11. In another embodiment of the threaded connection 1 according to the invention, the first through-hole assembly 35 has a circular shape. The first contact surface of the gap 27 and the contact surface 15 of the first member 29 are configured to block the tangential movement of the first anti-rotation member 12 beyond the first tangential member position 31 when an unscrewing tong 35 is applied to pin 2 and housing 5 in the unscrewing rotation direction 10. The first assembly through hole 25 has dimensions to prevent forces in the tangential direction working on the first member; assembly 26 by the location of the first member; anti-rotation 12 in the first tangential position 31 when an unscrewing tong 35 is applied to pin 2 and the box 5 in the unscrewing rotation direction 10. Among other things, this is shown in Figure 12. The first tangential distance of member 33 allows the 5 radial movement of the first part of the ratchet 16 in a relative radial direction 23 with respect to the longitudinal axis 11 when the first ratchet teeth 17 slide along the second ratchet teeth 19 during the relative rotation between the pin 2 and the housing 5 in the direction of 10 unscrewing rotation 9. The first mounting surface 24 comprises a first sliding mounting surface 40 that surrounds the first assembly through the hole 25 and is in contact with a corresponding first sliding recess surface 41 provided in the first radial recess 13 to facilitate the tangential movement of the first anti-rotation member 12 from the first tangential member position 31 into the second tangential member position 20 and vice versa. In particular, the first sliding recess surface 41 is longer in the tangential direction 20 than the first sliding mounting surface 40. The spring portion 21 of the first anti-rotation member 12 is in a tangential direction with respect to the longitudinal axis 11 QQonnn / eznz / E / YiAi located between the first ratchet part 16, and the first mounting part 24. The contact surface of the first member 29 belonging to the first anti-rotation member 12 is located in the first part of the ratchet 16 and the first teeth of the ratchet 17 are in a tangential direction with respect to the longitudinal axis 11 located between the contact surface of the first member 29 and the spring part 21. A first radial pawl thickness 42 of the first part of the pawl 16 increases in the tangential direction with respect to the longitudinal axis 11 from the spring part 21 towards the contact surface of the first member 29. In this way, the contact surface of the first member 29 is increased to reduce the pressure (and thus reduce the stresses) on the contact surface of the first member 29. The first anti-rotation member 12 is mounted only on one of the pins 2 and the housing 5 where the first radial hole 13 is provided by the first mounting part 24. The first anti-rotation member 12 comprises one, and only one, first mounting part 24. The first anti-rotation member 12 comprises one, and only one, mounting part 21. As shown in Figure 6C, the first ratchet teeth 17 of the first anti-rotation member 12 extend into the QQonnn / rznz / E / YiAi radial direction 23 beyond the outer surface of pin 3. Figures 4A to 4E show the second anti-rotation member 14 of the anti-rotation device 8 of the threaded connection 1 of the Figure 1. Figures 7, 8 and 9A to 9C show the second anti-rotation member 14 and the second radial hole 43 provided in the threaded connection housing 1 of Figure 1. The second anti-rotation member 14 is mounted so that it can be released into the second radial hole 43 provided on the inner surface 6 of the housing 5. In another embodiment of the threaded connection 1 according to the invention, the second anti-rotation member 14 is mounted so that it can be released into the second radial hole 43 on the outer surface of pin 3, of pin 2. The second radial hole 43 extends along the circumference 48 of box 5 of the inner surface of box 6 of box 5. The second ratchet part 18 of the second anti-rotation member 14 is fixed in the radial direction 23 with respect to the longitudinal axis 11. The second ratchet part 18 of the second anti-rotation member 14 may have some flexibility in the radial direction 23 with respect to the longitudinal axis 11; however, it must be more rigid than the first ratchet part 16. Another embodiment of the threaded connection 1 QQonnn / eznz / E / YiAi according to the invention, the second ratchet part 18 of the second anti-rotation member 14 can be more flexible in the radial direction 23 with respect to the longitudinal axis 11 and can be as rigid (or even less rigid than) as the first ratchet part 16. The second radial hole 43 comprises a second hole through an opening 46 where the second part of the ratchet 18 of the second anti-rotation member 14 is located. The second anti-rotation member 14 comprises two second mounting parts 44 for mounting so as to release the second anti-rotation member 14 in the housing 5. The two second mounting parts 44 are located on opposite sides of the second radial hole 43. The housing 5 comprises an outer box surface 45 and the second mounting parts 44 are positioned so as to release the housing 5 on the outer surface of the housing 45. In another embodiment of the threaded connection 1 according to the invention, the second anti-rotation member 14 comprises one, and only one, second mounting part 44 for mounting so as to release the second anti-rotation member 14 in the housing 5. Figure 10 shows perspective views of the first anti-rotation member 12 arranged in the first radial hole 13 provided in pin 2 and the second anti-rotation member 14 arranged QQonnn / eznz / E / YiAi in the second radial hole 43 provided in box 5 of the threaded connection 1 of Figure 1. This form has the advantage that a relatively robust threaded connection 1 can be provided while maintaining a relatively small external diameter. The external diameter of the threaded connection 1 can be defined by the external dimensions of the housing 5 in the radial direction 23 with respect to the longitudinal axis 11 of the housing 5. Generally, the first anti-rotation member 12 requires more space than the second anti-rotation member 14, particularly when the anti-rotation member moves in the tangential direction. By providing the first anti-rotation member 12 on the pin 2 and the second anti-rotation member 14 on the housing 5, a robust anti-rotation device 8 can be formed that is suitable for withstanding operating stresses while maintaining a relatively small external diameter.Furthermore, it was learned that with said first anti-rotation member 12 accommodated in said pin 2, the components (e.g., the spring part) are generally 20 less exposed to environmental influences (e.g., a dirty environment in a well). In another embodiment of the threaded connection 1 according to the invention, the first anti-rotation member 12 is QQonnn / eznz / E / YiAi arranged in the first radial hole 13 provided in the box 5 and the second anti-rotation member 14 is arranged in the second radial hole 43 provided in the pin 2. As shown in Figure 9C, the second ratchet teeth 5 17 of the second anti-rotation member 14 extend in the radial direction 23 beyond the outer surface of pin 6. Figures 11A to 11G show the method for adjusting the threaded connection 1 of Figure 1. This method comprises the step of activating the anti-rotation device 8 of the threaded connection 1 by means of a relative rotation between the pin 2 and the housing 5 in the adjustment rotation direction 9 until the final adjustment 20 of the threaded connection 1 is reached. The first contact surface of the gap 27 and the contact surface 15 of the first member 29 are configured to direct forces from the first pawl teeth 17 of the first part of the pawl 16 to the second pawl teeth 19 of the second part of the pawl 18 and / or from the second pawl teeth 19 of the second part of the pawl 18 to the second pawl teeth 17 of the first part of the pawl 16. This contact surface of the gap faces the first part of the pawl and the second part of the pawl. QQonnn / eznz / E / YiAi Figure 12 shows a finite element analysis of the situation in which the anti-rotation device 8 of the threaded connection 1 of Figure 1 has been activated and an unscrewing torque 35 has been applied to the pin 2 and the box 5 in the unscrewing rotation direction 5 10. Figure 12 indicates, among other things, that the forces are homogeneously distributed through the first anti-rotation member 12; for this reason, a relatively robust anti-rotation device 8 is provided. In particular, the forces resulting from the unscrewing torque 10 35 are directed mainly through the first contact surface of the hole 27 of pin 2, the contact surface of the first member 29 of the first ratchet part 16, the first ratchet teeth 17 of the first ratchet part 16 and / or the second ratchet teeth 19 of the second ratchet part 18, the second anti-rotation member 14 and the support surfaces of the second member 22 of the housing 5. An alternative embodiment of the threaded connection according to the invention is shown in Figures 13A to 18. In this alternative embodiment, the first anti-rotation member 12 is arranged in the first radial recess 13 provided in the inner surface 6 of the housing 5, and the second member QQonnn / eznz / E / YiAi anti-rotation 14 is provided on the inner surface of pin 3, of pin 2. Figures 13A to 13D show the first anti-rotation member having two spring parts 21 located on opposite sides of the first ratchet part 16. Figures 14A and 14B show the first radial hole 13 provided in box 5. Figures 15A and 15B show the first anti-rotation member 13 that is arranged in the first radial gap 13. The first radial hole 13 comprises a first hole through an opening 30 where the first part of the ratchet of the first anti-rotation member 12 is located. The first anti-rotation member 12 comprises two first mounting parts 24 for mounting so as to release the first anti-rotation member 12 in the housing 5. The two first mounting parts 24 are mounted so as to release the housing 5 on the outer surface of the housing 45. The two first mounting parts 24 are located on opposite sides of the first radial hole 13. The first anti-rotation member 12 comprises two spring parts 21 which together allow the radial movement of the first part of the ratchet 16 in a relative radial direction 23 with respect to the longitudinal axis when the first ratchet teeth slide along the second ratchet teeth QQonnn / eznz / E / YiAi during relative rotation between pin 2 and housing 5 in the adjustment rotation direction 9. Each spring part 21 is located between the first ratchet part 16 and a different part of the first two mounting parts 24. The spring parts 21 have a variable radial spring thickness 51. In particular, each of the spring parts 21 has two radially tapered sections. The first assembly part 16, the two spring parts 21 and the first two assembly parts 24 of the first anti-rotation member 12, are formed in one piece. Figure 16 shows a second anti-rotation member 14 and the Figure 17 shows the second radial hole 43 provided in pin 2. Figure 18 shows a second anti-rotation member 14 arranged in the second radial hole 43. The second anti-rotation member 14 is mounted so that it can be released in a second radial hole 43 provided on the outer surface of pin 3, from pin 2. The invention also relates to a threaded connection, an anti-rotation device, and a method in accordance with any 20 of the following clauses. 1. A threaded connection for exploration and production of a hydrocarbon well, said threaded connection comprising: QQonnn / eznz / E / YiAi - a pin comprising an external pin surface provided with an external thread, - a housing comprising an internal housing surface provided with an internal thread to engage with the external thread during rotary adjustment of the threaded connection, and - an anti-rotation device that allows relative rotation between the pin and the housing in an adjusting rotation direction and prevents relative rotation between the pin and the housing in an opposite unscrewing rotation direction, where: -- the pin and the box extend along an axis ongit ud ina 1, -- the anti-rotation device comprises a first anti-rotation member mounted so as to be releaseable which is arranged in a first radial recess provided in one of: the outer surface of the pin and the inner surface of the housing in the housing, and the second anti-rotation member is provided in the other outer surface of the pin in the pin and the inner surface of the housing, in the housing, — the first anti-rotation member comprises a first ratchet part 20 provided with first radially extended ratchet teeth. — and the second anti-rotation member comprises a second ratchet part provided with a second set of ratchet teeth QQonnn / eznz / E / YiAi radially extended that engage the first ratchet teeth of the first anti-rotation member at the final adjustment of the threaded connection, and -- the first anti-rotation member comprises a spring portion 5 that allows radial movement of the first part of the ratchet in a radial direction with respect to the longitudinal axis when the first ratchet teeth slide over the second ratchet teeth during relative rotation between the pin and the housing in the adjustment rotation direction 10. 2. The threaded connection according to clause 1, where the first ratchet part and the spring part of the first anti-rotation member are formed in one piece. 3. The threaded connection in accordance with clause 1 or 2, where 15 the first spring part has a spring stiffness that is less than the first ratchet stiffness of the first ratchet part. 4. The threaded connection according to any of the preceding clauses, wherein the first anti-rotation member comprises a first mounting part for mounting so as to allow the first anti-rotation member to be released in the first hole QQonnn / eznz / E / YiAi radial. 5. The threaded connection according to clause 4, wherein the first mounting part comprises a first through-hole mounting for receiving a first mounting member, such as a first screw, which mounts so that the first anti-rotation member can be released with said pin and with the housing where the first radial hole is provided. 6. The threaded connection according to clause 4 or 5, where the first ratchet part, the spring part and the first mounting part of the first anti-rotation member are formed 10 in one piece. The threaded connection in accordance with clause 6, where the first spring part has a spring stiffness less than the first ratchet stiffness of the first ratchet part and / or less than the first assembly stiffness of the first assembly part. 8. The threaded connection according to any of claims 4-7, where: - a first contact surface of the pin hole and the housing where the first radial hole is provided, defines a first limit of the first radial hole, - the first anti-rotation member comprises a first member contact surface facing the first gap contact surface, and QQonnn / eznz / E / YiAi - The first part of the assembly is configured to allow tangential movement in a tangential direction with respect to the longitudinal axis of the first anti-rotation member in the first radial gap from a tangential position of the first member 5 where the first contact surface of the first anti-rotation member is in contact with the first contact surface of the gap in a second tangential member position where the contact surface of the first anti-rotation member is located at a first tangential member distance from the first contact surface of the gap, and vice versa. 9. The threaded connection in accordance with clause 8, wherein the first contact surface of the hole and the contact surface of the first member are configured to distribute the forces as a result of an unscrewing torque applied 15 on the pin and the housing in the unscrewing rotation direction, mainly through the teeth of the first part of the ratchet and the second part of the ratchet. 10. The threaded connection according to clause 8 or 9, wherein the first contact surface of the gap and the contact surface of the first member are configured to direct forces from the first ratchet teeth of the first ratchet part to the second ratchet teeth of the second ratchet part, and / or from the second ratchet teeth of the second ratchet part to the first ratchet teeth of the first ratchet part. 11. The threaded connection in accordance with any of clauses 8-10, wherein said contact surface of the hole 5 faces the first part of the ratchet. 12. The threaded connection in accordance with any of clauses 8-10, wherein the first contact surface of the gap faces the first part of the ratchet and the second part of the ratchet. 13. The threaded connection in accordance with any of clauses 8-12, wherein the second anti-rotation member is configured to push the first anti-rotation member: - within the second tangential member position when a predetermined adjusting torque is applied to the pin and housing 15 in the adjusting rotation direction, and - within the first tangential member position when a predetermined unscrewing torque is applied to the pin and housing, in the unscrewing rotation direction. 14. The threaded connection in accordance with clause 13, where the second 20 ratchet teeth engage with the first ratchet teeth, pushing the first anti-rotation member: - into the second tangential position of the member when the predetermined tightening torque is applied, and QQonnn / eznz / E / YiAi - within the first tangential member position when the predetermined unscrewing torque is applied. 15. The threaded connection in accordance with any of clauses 8-14, wherein the first contact surface of the hole 5 and the contact surface of the first member are configured to create a radial counterforce acting against the radial movement of the first ratchet part in a radial relative direction with respect to the longitudinal axis when the first anti-rotation member is located in the first tangential position 10 and an unscrewing tong is applied to the pin and housing in the unscrewing rotation direction. 16. The threaded connection according to clause 15, wherein the opposing radial force is formed by a frictional force between the first contact surface of the hole and the contact surface 15 of the first member when an unscrewing torque is applied to the pin and the housing in the unscrewing rotation direction. 17. The threaded connection in accordance with any of clauses 8-16 and in combination with clause 4, wherein the first through-hole assembly that is in a tangential direction with respect to the longitudinal axis is longer than a first mounting portion of the first mounting member surrounded by the first through-hole assembly to allow the QQonnn / eznz / E / YiAi movement of the first anti-rotation member in the tangential direction and with respect to the first assembly member. 18. The threaded connection in accordance with clause 17, wherein the first through-hole assembly has an elongated shape in a tangential direction with respect to the longitudinal axis or a circular shape. 19. The threaded connection in accordance with any of clauses 8-18, wherein the first contact surface of the gap and the contact surface of the first member are configured to block the tangential movement of the first member from rotation beyond the tangential position of the first member when an unscrewing tong is applied to the pin and housing in rotation to unscrew. 20. The threaded connection of clause 19 in combination with clause 17 or 18, wherein the first through-hole assembly has dimensions to prevent forces in the tangential direction working on the first assembly member by locating the first anti-rotation member in the tangential position of the first member when a tightening torque is applied to the pin and housing during the tightening rotation. 21. The threaded connection in accordance with any of clauses 8-20, where the tangential distance of the first member QQonnn / eznz / E / YiAi allows radial movement of the first part of the ratchet in a radial relative direction with respect to the longitudinal axis when the first ratchet teeth slide along the second ratchet teeth during relative rotation 5 between the pin and the case in the adjustment rotation direction. 22. The threaded connection according to any of clauses 8-21, wherein the first mounting part comprises a first sliding mounting surface surrounding the first through-hole mounting and in contact with a corresponding first sliding recess surface provided in the first radial recess to facilitate tangential movement of the first anti-rotation member from the first tangential position of the member to the second tangential position and vice versa. 23. The threaded connection in accordance with any of the 15 clauses 8-22, wherein the spring portion of the first anti-rotation member is in a tangential direction with respect to the longitudinal axis located between the first ratchet portion and the first mounting portion. 24. The threaded connection in accordance with any of clauses 8-23, wherein the contact surface of the first member of the first anti-rotation member is located on the first part of the ratchet and the first ratchet teeth are in a tangential direction with respect to the axis QQonnn / eznz / E / YiAi longitudinal located between the contact surface of the first member and the spring part. 25. The threaded connection according to clause 24, wherein a first radial thickness of the ratchet of the first part of the ratchet increases in the tangential direction with respect to the longitudinal axis located from the spring part towards the contact surface of the first member. 26. The threaded connection in accordance with any of clauses 8-25, wherein the first anti-rotation member is only mounted on one of the pins and the housing where the first radial hole is provided by the first mounting part. 27. The threaded connection in accordance with any of clauses 8-26, wherein the first anti-rotation member comprises one, and only one, first mounting part. 28. The threaded connection in accordance with any of clauses 8-27, wherein the first anti-rotation member comprises one, and only one, first spring part. 29. The threaded connection in accordance with any of the preceding clauses, wherein the second ratchet part of the second anti-rotation member is fixed in the radial direction with respect to the longitudinal axis. 30. The threaded connection in accordance with any of the preceding clauses, where the second anti-rotation member QQonnn / eznz / E / YiAi is mounted so that it can be released into the second radial hole provided on the other outer pin surface, on the pin and the inner surface of the case in the case. 31. The threaded connection in accordance with any of the above clauses, wherein the first anti-rotation member is arranged in the first radial recess provided on the outer surface of the pin, and the second anti-rotation member is provided on the other inner surface of the housing. 32. the threaded connection according to clause 31, wherein the second anti-rotation member is mounted so that it can be released into a second radial recess provided on the inner surface of the housing. 33. The threaded connection according to clause 32, wherein the second radial hole comprises a second hole through a 15 hole where the second part of the ratchet of the second anti-rotation member is located. 34. The threaded connection according to clause 32 or 33, wherein the second anti-rotation member comprises at least a second mounting part for mounting so that the second anti-rotation member can be released in the housing. 35. The threaded connection according to clause 34, wherein the housing comprises a second external housing surface and, to QQonnn / eznz / E / YiAi less, a second mounting part that can be released, mounted on the leaf on the outer surface of the case. 36. The threaded connection according to clause 34 or 35, wherein the second anti-rotation member comprises two second locking parts 5 for mounting so that the second anti-rotation member can be released in the housing. 37. The threaded connection in accordance with clause 36, wherein two second mounting parts are located on opposite sides of the second radial hole. 38. The threaded connection in accordance with any of clauses 1-30, wherein the first anti-rotation member is arranged in the first radial recess provided on the outer surface of the housing, and the second anti-rotation member is provided on the outer surface of the pin. 39. The threaded connection according to clause 38, wherein the second anti-rotation member is mounted so that it can be released in a second radial recess provided on the outer surface of the pin. 40. The threaded connection according to clause 38 or 39, wherein 20 the first radial hole comprises a first hole through an orifice where the first part of the ratchet of the first anti-rotation member is located. QQonnn / eznz / E / YiAi 41. The threaded connection in accordance with any of clauses 38-40, wherein the first anti-rotation member comprises at least a first mounting part for mounting so as to allow the first anti-rotation member to be released in the housing. 42. The threaded connection according to clause 41, wherein the housing comprises an outer surface of the housing and at least a first mounting part is mounted so as to be released on the outer surface of the housing. 43. The threaded connection according to clause 41 or 42, wherein the first anti-rotation member comprises two first mounting parts for mounting so that the first anti-rotation member can be released in the housing. 44. The threaded connection according to claim 43, wherein two first mounting parts are located on opposite sides 15 of the first radial hole. 45. The threaded connection according to claim 43 or 44, wherein the first anti-rotation member comprises two spring parts which together allow radial movement of the first part of the ratchet in a radial direction relative to the longitudinal axis when the first ratchet teeth slide over the second ratchet teeth during relative rotation between the pin and the housing in the adjustment rotation direction. QQonnn / rznz / E / YiAi 46. ​​The threaded connection according to claim 45, wherein each spring part is located between the first ratchet part, and a different part of the first two mounting parts. 47. The threaded connection according to claim 45 or 46, where each part of the spring has a variable spring thickness, such as two radially tapered sections. 48. The threaded connection in accordance with any of the 10 clauses above, wherein the anti-rotation device is configured to be activated by relative rotation between the pin and the housing in the direction of rotation until the final adjustment of the threaded connection is achieved. 49. The threaded connection in accordance with any of the 15 preceding clauses, wherein the first ratchet teeth and the second ratchet teeth extend in opposite radial directions with respect to the longitudinal axis when they engage with each other in the final adjustment of the threaded connection. 50. The threaded connection in accordance with any of the 20 preceding clauses, wherein the first ratchet teeth of the first anti-rotation member extend in a radial direction beyond an external surface of the pin and the internal surface of the housing where the first radial hole is provided, and the second ratchet teeth of the second anti-rotation member extend in a radial direction beyond an external surface of the pin and the internal surface of the housing where the second anti-rotation member is provided. 51. The threaded connection in accordance with any of the preceding clauses, wherein the first radial hole extends along part of the circumference of said external pin surface, and the internal surface of the box in the box. 52. The threaded connection in accordance with any of the preceding clauses, wherein the second radial hole extends along part of the circumference of said external pin surface, and the internal surface of the housing in the 53. The threaded connection in accordance with any of the preceding clauses, wherein the radial movement relative to the longitudinal axis of the first part of the ratchet moves the first ratchet teeth radially with respect to the second ratchet teeth. 54. The method for preparing a threaded connection for exploration and production of a hydrocarbon well, comprising the step of activating the anti-rotation device of the threaded connection in accordance with any of the preceding clauses, QQonnn / eznz / E / YiAi by means of a relative rotation between the pin and the box in the direction of adjustment rotation until the final adjustment of the threaded connection is reached. 55. The anti-rotation device for a threaded connection for exploration and production of a hydrocarbon well, said hydrocarbon well comprising a pin comprising an external pin surface provided with an external thread, and a housing comprising an internal housing surface provided with an internal thread to engage with the external thread during rotational tightening of the threaded connection, the pin and housing extending along a longitudinal axis, and wherein: - The anti-rotation device is configured to allow relative rotation between the pin and the housing in an adjusting rotation direction and to prevent relative rotation between the pin and the housing in an opposite unscrewing rotation direction. - the anti-rotation device comprises a first anti-rotation member mounted so as to be releaseable which is arranged in a first radial recess provided on one of: the outer surface of the pin and the inner surface of the housing in the housing, and the second anti-rotation member is provided on the other outer surface of the pin, on the pin and the inner surface of the housing in the housing, QQonnn / eznz / E / YiAi - the first anti-rotation member comprises a first ratchet part provided with first radially extended ratchet teeth, the second anti-rotation member comprises a second ratchet part provided with second radially extended ratchet teeth that engage with the first ratchet teeth of the first anti-rotation member at the final adjustment of the threaded connection, and - the first anti-rotation member comprises a spring portion that allows radial movement of the first part of the ratchet in a radial direction with respect to the longitudinal axis when the first ratchet teeth slide over the second ratchet teeth during relative rotation between the ratchet and the housing in the unscrewing rotation direction. As required, detailed embodiments of the present invention are disclosed in the Figures; however, it should be understood that the disclosed embodiments are merely illustrative of the invention, which can be implemented in various ways. Therefore, the specific structural and functional details disclosed herein should not be construed as limiting, but simply as a basis for the claims and as a representative basis for teaching. QQonnn / eznz / E / YiAi an expert in the technique to employ the present invention in virtually any suitably detailed structure. The terms "a" or "an," as used herein, are defined as one or more than one. The terms "multiple" and "plurality," as used herein, are defined as two or more. The term "other," as used herein, is defined as at least one or more items. The terms "include" and / or "have," as used herein, are defined as comprising (i.e., open language, without excluding other elements or stages). Any reference sign in the claims shall not be construed as limiting the scope of the claims or the invention. It will be evident to those skilled in the art that various modifications can be made to the threaded connection, anti-rotation device, and method shown in accordance with the invention without departing from the scope as defined in the QQonnn / eznz / E / YiAi claims.

Claims

1. A threaded connection for exploration and production of a hydrocarbon well, said threaded connection being characterized in that it comprises: - a pin comprising an external pin surface provided with an external thread, - a housing comprising an internal housing surface provided with an internal thread to engage with the external thread during rotational tightening of the threaded connection, and - an anti-rotation device permitting relative rotation between the pin and the housing in an tightening rotation direction and preventing relative rotation between the pin and the housing in an opposite loosening rotation direction, wherein: 15 -- the pin and the housing extend along a longitudinal axis,- - the anti-rotation device comprises a first anti-rotation member mounted so as to be releaseable, which is arranged in a first radial recess provided on one of: the outer surface of the pin and the inner surface of the housing in the housing, and the second anti-rotation member is provided on the other outer surface of the pin, on the pin and the inner surface of the housing in the housing, - the first anti-rotation member comprises a first ratchet portion provided with first radially extended ratchet teeth, - - the second anti-rotation member comprises a second ratchet portion provided with second radially extended ratchet teeth which engage with the first ratchet teeth of the first anti-rotation member in the final adjustment of the threaded connection,- the first anti-rotation member comprises a spring portion 10 that allows radial movement of the first part of the ratchet in a radial direction with respect to the longitudinal axis when the first ratchet teeth slide over the second ratchet teeth during relative rotation between the pin and the housing in the adjustment rotation direction 15, - and -- the first part of the ratchet and the spring portion of the first anti-rotation member are formed in one piece.

2. The threaded connection according to claim 1, characterized in that the first spring part has a spring stiffness 20 that is less than the first ratchet stiffness of the first ratchet part.

3. The threaded connection according to claim 1 or 2, characterized in that the first anti-rotation member comprises QQonnn / eznz / E / YiAi a first mounting part for mounting, so as to be released, the first anti-rotation member in the first radial hole 1.

4. The threaded connection according to claim 3, 5 characterized in that the first mounting part comprises a first through-hole mounting for receiving a first mounting member, such as a first screw, which mounts, in a release manner, the first anti-rotation member with said pin and with the housing where the first radial hole 10 is provided.

5. The threaded connection according to claim 3 or 4, characterized in that the first ratchet portion, the spring portion, and the first mounting portion of the first anti-rotation member are formed in one piece. 15 6. The threaded connection according to claim 5, characterized in that the first spring part has a spring stiffness less than the first ratchet stiffness of the first ratchet part and / or less than the first assembly stiffness of the first assembly part. 20 7. The threaded connection according to any of claims 3-6, characterized by: - ​​a first contact surface of the pin hole and the housing where the first radial hole is provided, defining a first boundary of the first radial hole, - the first anti-rotation member comprises a contact surface of the first member facing the first contact surface of the hole,and - the first part of the assembly is configured to allow tangential movement in a tangential direction with respect to the longitudinal axis of the first anti-rotation member in the first radial gap from a tangential position of the first member where the first contact surface of the first anti-rotation member is in contact with the first contact surface of the gap in a second tangential position of the member where the contact surface of the first anti-rotation member is located at a first tangential member distance from the first contact surface of the gap, and vice versa.

8. The threaded connection according to claim 7, characterized in that the first contact surface of the recess 20 and the contact surface of the first member are configured to distribute the forces resulting from a loosening torque applied to the pin and the housing in the loosening rotation direction, mainly through the teeth of the first part of the ratchet and the second part of the ratchet.

9. The threaded connection according to claim 7 or 8, characterized in that the first contact surface of the recess 5 and the contact surface of the first member are configured to direct forces from the first ratchet teeth of the first ratchet part to the second ratchet teeth of the second ratchet part and / or from the second ratchet teeth of the second ratchet part 10 to the first ratchet teeth of the first ratchet part.

10. The threaded connection according to any of claims 7-9, characterized in that said contact surface of the recess faces the first part of the ratchet. 15 11. The threaded connection according to any of claims 7-9, characterized in that the first contact surface of the clog faces the first part of the ratchet and the second part of the ratchet.

12. The threaded connection according to any of claims 7-11, characterized in that the second anti-rotation member is configured to push the first anti-rotation member: / 2 - within the second tangential member position when a predetermined adjusting torque is applied to the pin and housing in the adjusting rotation direction, and - within the first tangential member position when a predetermined adjusting torque is applied to the pin and housing in the unscrewing rotation direction.

13. The threaded connection according to claim 12, characterized in that the second ratchet teeth, which engage with the first ratchet teeth, push the first anti-rotation member: - into the second tangential position of the member when the predetermined tightening torque is applied, and - into the first tangential position of the member when the predetermined tightening torque is applied. 15 14. The threaded connection according to any of claims 7-13, characterized in that the first contact surface of the recess and the contact surface of the first member are configured to create a radial counterforce acting against the radial movement of the first part of the ratchet in a radial relative direction with respect to the longitudinal axis when the first anti-rotation member is located in the first tangential position and an unscrewing torque is applied to the pin and the housing in the unscrewing rotation direction.

15. The threaded connection according to claim 14, characterized in that the opposing radial force is formed by means of a frictional force between the first contact surface of the hole and the contact surface of the first member when an unscrewing torque is applied to the pin and the housing in the unscrewing rotation direction.

16. The threaded connection according to any of claims 7-15 and in combination with claim 4, characterized in that the first through-hole mounting being in a tangential direction with respect to the longitudinal axis is longer than a first mounting portion of the first mounting member surrounded by the first through-hole mounting 15 to allow movement of the first anti-rotation member in the tangential direction with respect to the first mounting member.

17. The threaded connection according to claim 16, characterized in that the first assembly through the hole 20 has an elongated shape in a tangential direction with respect to the longitudinal axis or a circular shape.

18. The threaded connection according to any of claims 7-17, characterized in that the first contact surface of the recess and the contact surface of the first member are configured to block the movement of the first member beyond the tangential position of the first member when a torque of 5 is applied to the pin and housing in the direction of rotation to unscrew.

19. The threaded connection of claim 18 and in combination with claim 16 or 17, characterized in that the first through-hole assembly has dimensions to prevent tangential forces acting on the first mounting member by positioning the first anti-rotation member in the tangential position of the first member when an unscrewing torque is applied to the pin and housing in the unscrewing rotation direction. 15 20. The threaded connection according to any of claims 7-19, characterized in that the first tangential member distance permits radial movement of the first part of the ratchet in a radial relative direction with respect to the longitudinal axis when the first ratchet teeth slide along the second ratchet teeth during relative rotation between the pin and the housing in the adjustment rotation direction.

21. The threaded connection according to any of claims 7-20, characterized in that the first mounting portion comprises a first sliding mounting surface surrounding the first through-hole assembly and in contact with a first sliding recess surface provided in the first radial recess to facilitate tangential movement of the first anti-rotation member from the first tangential position of the member to the second tangential position and vice versa. 10 22. The threaded connection according to any of claims 7-21, characterized in that the spring portion of the first anti-rotation member is in a tangential direction with respect to the longitudinal axis located between the first ratchet portion and the first mounting portion. 15 23. The threaded connection according to any of claims 7-22, characterized in that the first contact surface of the first member of the first anti-rotation member is located in the first part of the ratchet and the first ratchet teeth are in a tangential direction with respect to the longitudinal axis located between the contact surface of the first member and the spring part.

24. The threaded connection according to claim 23, characterized in that a first radial thickness of the ratchet of / 6 the first part of the ratchet increases in the tangential direction with respect to the longitudinal axis located from the spring part towards the contact surface of the first member.

25. The threaded connection according to any of the 5 claims 7-24, characterized in that the first anti-rotation member is mounted only on one of the pins and the housing where the first radial hole is provided by the first mounting part.

26. The threaded connection according to any of the 10 claims 7-25, characterized in that the first anti-rotation member comprises one, and only one, first mounting part.

27. The threaded connection according to any of claims 7-26, characterized in that the first anti-rotation member 15 comprises one, and only one, first spring part.

28. The threaded connection according to any of the preceding claims, characterized in that the second ratchet portion of the second anti-rotation member is fixed radially with respect to the longitudinal axis. 20 29. The threaded connection according to any of the preceding claims, characterized in that the second anti-rotation member is mounted so that it can be released, in the second radial recess provided on the other QQonnn / eznz / E / YiAi outer surface of the pin, on the pin and the inner surface of the housing in the housing.

30. The threaded connection according to any of the preceding claims, characterized in that the anti-rotation member 5 is arranged in the first radial recess provided in the outer surface of the pin, and the second anti-rotation member is provided on the other inner surface of the housing, in the housing.

31. The threaded connection according to claim 30, 10 characterized in that the second anti-rotation member is mounted, so as to be released, in a second radial recess provided in the inner surface of the housing.

32. The threaded connection according to claim 31, characterized in that the second radial hole comprises a second hole through an orifice where the second part of the ratchet of the first anti-rotation member is located.

33. The threaded connection according to claim 31 or 32, characterized in that the second anti-rotation member comprises at least a second mounting part for mounting the second anti-rotation member in the housing in such a way that it can be released.

34. The threaded connection according to claim 33, characterized in that the housing comprises a second external surface QQonnn / eznz / E / YiAi of the housing and at least a second releaseable mounting part mounted on the external surface of the housing.

35. The threaded connection according to claim 33 or 5 34, characterized in that the second anti-rotation member comprises two second mounting parts for mounting so that the second anti-rotation member can be released at C 3 j 3 .

36. The threaded connection according to claim 35, 10 characterized in that two first mounting parts are located on opposite sides of the second radial hole.

37. The threaded connection according to any of claims 1-29, characterized in that the first anti-rotation member is arranged in the first radial recess provided 15 on the outer surface of the housing, and the second anti-rotation member is provided on the outer surface of the pin.

38. The threaded connection according to claim 37, characterized in that the second anti-rotation member is mounted so that it can be released, in a second radial recess 20 provided on the outer surface of the pin, from the pin.

39. The threaded connection according to claim 37 or 38, characterized in that the first radial hole comprises a first hole through an orifice where the first part of the ratchet of the first anti-rotation member is located.

40. The threaded connection according to any of claims 37-39, characterized in that the first anti-rotation member 5 comprises, in addition, a first mounting part for mounting so as to allow the first anti-rotation member to be released in the housing.

41. The threaded connection according to claim 40, characterized in that the box comprises an external surface of 10 the box and at least a first mounting part is mounted so that it can be released, to the box, on the external surface of the box.

42. The threaded connection according to claim 40 or 41, characterized in that the first anti-rotation member 15 comprises two first mounting parts for mounting so that the first anti-rotation member can be released in the housing.

43. The threaded connection according to claim 42, characterized in that the first two mounting parts are located on opposite sides of the first radial hole. 20 44. The threaded connection according to claim 42 or 43, characterized in that the first anti-rotation member comprises two spring parts which together allow radial movement of the first part of the ratchet in a radial direction QQonnn / eznz / E / YiAi relative to the longitudinal axis when the first ratchet teeth slide over the second ratchet teeth during relative rotation between the pin and the housing in the adjustment rotation direction. 5 45. The threaded connection according to claim 44, characterized in that each spring part is located between the first ratchet part, and a different part of the first two mounting parts.

46. ​​The threaded connection according to claim 44 or 10 45, characterized in that each spring part has a variable spring thickness, such as, for example, two radially tapered sections.

47. The threaded connection according to any of the preceding claims, characterized in that the anti-rotation device is configured to be activated by relative rotation between the pin and the housing in the direction of rotation until the final adjustment of the threaded connection is reached.

48. The threaded connection according to any of the preceding 20 claims, characterized in that the first ratchet teeth and the second ratchet teeth extend in opposite radial directions with respect to the longitudinal axis QQonnn / eznz / E / YiAi when they engage with each other in the final adjustment of the threaded connection.

49. The threaded connection according to any of the preceding claims, characterized in that the first 5 ratchet teeth of the first anti-rotation member extend in a radial direction beyond an external surface of the pin and the internal surface of the housing where the first radial recess is provided, and the second ratchet teeth of the second anti-rotation member extend in a radial direction beyond an external surface of the pin and the internal surface of the housing where the second anti-rotation member is provided.

50. The threaded connection according to any of the preceding claims, characterized in that the first radial hole extends along part of the circumference of said external pin surface, and the internal surface of the housing, in the housing.

51. The threaded connection according to any of the preceding claims, characterized in that the second radial recess extends along part of the circumference of said external pin surface, and the internal surface of the housing, in the housing. QQonnn / eznz / E / YiAi 52. The threaded connection according to any of the preceding claims, characterized in that the radial movement relative to the longitudinal axis of the first ratchet part moves the first ratchet teeth radially 5 with respect to the second ratchet teeth.

53. The method for preparing a threaded connection for exploration and production of a hydrocarbon well, characterized in that it comprises the step of activating the anti-rotation device of the threaded connection according to any one of the preceding claims, by relative rotation between the pin and the housing in the direction of rotation of the tightening process until the final tightening of the threaded connection is achieved.

54. The anti-rotation device for a threaded connection for exploration and production of a hydrocarbon well, said threaded connection being characterized in that it comprises a pin comprising an external pin surface provided with an external thread, and a housing comprising an internal housing surface provided with an internal thread to engage with the external thread during the rotary tightening of the threaded connection, the pin and housing extending along a longitudinal axis.and where: - the anti-rotation device is configured to permit relative rotation between the pin and the housing in an adjusting rotation direction and to prevent relative rotation between the pin and the housing in an opposite unscrewing rotation direction, - the anti-rotation device comprises a first anti-rotation member mounted so as to be releaseable, which is arranged in a first radial recess provided in one of: the outer surface of the pin and the inner surface of the housing in the housing, and the second anti-rotation member is provided in the other outer surface of the pin and the inner surface of the housing. - the first anti-rotation member comprises a first ratchet portion provided with first radially extended ratchet teeth,— and the second anti-rotation member comprises a second ratchet part 15 provided with radially extended second ratchet teeth that engage with the first ratchet teeth of the first anti-rotation member in the final adjustment of the threaded connection, — the first anti-rotation member comprises a spring part 20 that allows radial movement of the first ratchet part in a radial direction with respect to the longitudinal axis when the first ratchet teeth slide over the second ratchet teeth during the relative rotation between the pin and the housing in the unscrewing rotation direction. — the first ratchet part and the spring part of the first anti-rotation member are formed as a single piece.

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