EP4616042B1 - Rohrgewindeanschluss - Google Patents

Rohrgewindeanschluss

Info

Publication number
EP4616042B1
EP4616042B1 EP23798487.7A EP23798487A EP4616042B1 EP 4616042 B1 EP4616042 B1 EP 4616042B1 EP 23798487 A EP23798487 A EP 23798487A EP 4616042 B1 EP4616042 B1 EP 4616042B1
Authority
EP
European Patent Office
Prior art keywords
tubular
thread
tubular component
corrected
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP23798487.7A
Other languages
English (en)
French (fr)
Other versions
EP4616042A1 (de
EP4616042C0 (de
Inventor
Thimothé DELBOSCO
Pierre Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vallourec Oil and Gas France SAS
Nippon Steel Corp
Original Assignee
Vallourec Oil and Gas France SAS
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vallourec Oil and Gas France SAS, Nippon Steel Corp filed Critical Vallourec Oil and Gas France SAS
Publication of EP4616042A1 publication Critical patent/EP4616042A1/de
Application granted granted Critical
Publication of EP4616042B1 publication Critical patent/EP4616042B1/de
Publication of EP4616042C0 publication Critical patent/EP4616042C0/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded

Definitions

  • the invention relates to the field of threaded connections of tubular components intended for example for drilling, the operation of hydrocarbon wells, the transport of oil and gas, the storage of fluids as well as the field of geothermal energy or CO2 capture.
  • Threaded connections of tubular components consist of tubular components joined in pairs to ensure a leak-proof connection for transporting oil, gas, or other fluids.
  • Each of these joined tubular components has a threaded end. This threaded end is located on an internal surface of the tubular component in the case of a female threaded end (or “box”) or on an external surface of the tubular component in the case of a male threaded end (or “pin”). These threaded ends are complementary, allowing the tubular components to be screwed together in pairs.
  • tubular components of a threaded connection are assembled under defined constraints to meet the tightening and sealing requirements imposed by the operating conditions. Once assembled, the tubular components form what is known as a joint or a connection in its assembled state.
  • these threaded connections are subjected to axial tensile and/or compressive stresses, internal and/or external fluid pressures, bending, and torsion, possibly combined, and of varying intensity.
  • the sealing of these threaded connections must be ensured despite these stresses and despite harsh operating conditions on site.
  • Threaded connections must also be able to be screwed and unscrewed multiple times without degradation of their performance, particularly due to seizing. After unscrewing, these components can be reused under other service conditions.
  • the document US20070158943 describes a threaded connection with variable tooth width and self-locking threads, i.e., with interference between tooth flanks of said threads.
  • the threaded connection described in the document US20070158943 It also features metal-to-metal sealing surfaces. Such connections offer high torque while ensuring a good seal.
  • the two tubular components forming the connection have a controlled relative positioning to ensure proper interaction of the sealing surfaces and therefore a good seal.
  • the screwing of the two tubular components allows sufficient interference between the two sealing surfaces to ensure a watertight connection while avoiding excessive interference that could cause seizing and/or damage to the sealing surfaces.
  • connection described in the document US20070158943 It also includes additional buttress surfaces on the tubular components.
  • the buttressing of these surfaces ensures correct relative positioning between the tubular components forming the connection.
  • such buttress surfaces occupy a significant radial space and therefore limit the space available for the other elements of the tubular components.
  • such buttress surfaces constitute stress concentration zones that can disrupt the proper functioning of the connection. These buttress surfaces are therefore not entirely satisfactory for ensuring correct relative positioning of the tubular components in a variable tooth width threaded connection with interference and dedicated sealing surfaces.
  • the documents US 2010/171305 , GB 1173471 And WO 01/29476 They also describe threaded connections.
  • a marker for example a visual marker
  • the tubular components are screwed together until a target tightening torque, hereinafter referred to as the target torque, is achieved.
  • This target torque corresponds to the torque obtained when the threaded connection is in the assembled state. If the end of the tubular component without the visual marker is aligned with the said visual marker in the assembled state of the connection, the connection is considered to have satisfactory operating properties and is therefore accepted. Conversely, if the end of the tubular component without the visual marker is not aligned with the said visual marker in the assembled state of the connection, then the threaded connection is considered to have unsatisfactory operating properties and is therefore rejected.
  • Such visual markers are arranged on one of the tubular components according to a nominal marker position.
  • This nominal marker position is determined by analogous to the other connection parameters, that is, by means of a dimension defined in the specifications of the connection and the tubular components. More specifically, this reference point is defined by a nominal optimal relative position between the tubular components as well as by nominal axial positioning tolerances on either side of this nominal optimal relative position.
  • the nominal position of the reference mark is subject to manufacturing tolerances.
  • the nominal optimal relative position, as well as the nominal axial positioning tolerances are subject to manufacturing tolerances for their positioning on the tubular component.
  • One idea underlying the invention is to provide a connection offering high torque and good sealing in a reliable manner.
  • one idea underlying the invention is to position a relative positioning marker between two tubular components of a connection precisely and reliably.
  • one idea underlying the invention is to take into account the structural elements of the threaded connection to determine a precise and reliable positioning of the relative positioning marker between the tubular components.
  • Another idea underlying the invention is to use the actual characteristics of the connection and the tubular components to determine the positioning of the marker.
  • a variable tooth width thread has teeth whose width, measured along an axial direction of the tubular component, increases along a direction oriented from the free end of the component towards the main body of said tubular component.
  • This tooth width is measured at the same height on successive teeth, for example at the crest width of said teeth, with the exception of imperfect teeth.
  • This The variation in tooth width is achieved by means of a difference in the thread pitches of the tooth flanks, for example the thread pitch of the tooth engagement flanks being greater than the thread pitch of the tooth loading flanks.
  • the reference mark used to control the relative position between the first and second tubular components in the assembled connection is positioned on the corresponding tubular component with a satisfactory degree of accuracy. Specifically, this positioning of the reference mark is determined by the actual characteristics of the tubular components and the tubular connection, and not by a theoretical position that would fail to account for the manufacturing tolerances of both the reference mark and the other characteristics of the tubular components and the connection.
  • a reference mark arranged according to the above characteristics ensures optimal relative positioning of the first and second tubular components. Specifically, such a reference mark, arranged according to the above characteristics, guarantees satisfactory relative positioning of the first and second sealing surfaces, ensuring a satisfactory seal of the connection in the assembled state. Furthermore, this proper positioning of the reference mark, and therefore of the sealing surfaces, ensures that no damage is caused by excessive interference on the sealing surfaces.
  • Such a reference mark with its corrected optimal relative position, also ensures satisfactory tightening of the first and second tubular components without requiring a specific tightening curve. Indeed, tightening the tubular components until the distal end of the component without the reference mark is aligned with the reference mark is sufficient to guarantee that the tubular connection is in a satisfactory assembled state.
  • a connection according to the invention advantageously allows high levels of tensile and compressive forces to be supported in a simple and reliable manner, such a connection not requiring the presence of a thrust surface to support high levels of tensile and compressive forces.
  • such a tubular connection may include one or more of the following characteristics, alone or in combination.
  • the correction is based on an external diameter of said one among the first tubular component and the second tubular component on which the marker is arranged.
  • the correction is based on a radial thickness of said one of the first tubular component and the second tubular component on which the marker is arranged.
  • the correction is based on a thread pitch of said component one of the first tubular component and the second tubular component on which the reference mark is arranged.
  • this thread pitch is the thread pitch of an engagement flank of the thread belonging to said component one of the first tubular component and the second tubular component having the reference mark.
  • this thread pitch is the thread pitch of a loading flank of the thread belonging to said component one of the first tubular component and the second tubular component having the reference mark.
  • the correction is based on a target torque of the tubular connection.
  • the first thread comprises a plurality of first teeth, the first teeth having a width, taken along a longitudinal axis of the tubular connection, increasing in a first direction along the axis of the tubular connection.
  • the second thread comprises a plurality of second teeth, the second teeth having a width, taken along a longitudinal axis of the tubular connection, increasing in a second direction along the axis of the connection, the first direction being opposite to the second direction.
  • the first direction is oriented from a distal end of the first tubular component towards a main body of the first tubular component.
  • the second direction is oriented from a distal end of the second tubular component towards a main body of the second tubular component.
  • the corrected optimal relative position of the reference frame defines an optimal axial positioning of one distal end of the other between the first and second tubular components.
  • the reference frame defines, by means of the corrected optimal relative position on one of the tubular components, where the distal end of the other tubular component must stop to obtain a satisfactory tubular connection in the assembled state.
  • the tubular connection has a lower tolerance zone.
  • Such a lower tolerance zone defines a range of relative positions between tubular components within which a loss of interference between sealing surfaces is acceptable without significantly compromising the proper functioning of the tubular connection.
  • a loss of interference between sealing surfaces is acceptable without significantly compromising the proper functioning of the tubular connection.
  • an interference loss between the first and second sealing surfaces of approximately 30% of the nominal interference in the assembled state of the connection, i.e., at the target torque, can be considered acceptable.
  • a tubular connection in the assembled state exhibiting at least 70% interference between the first and second sealing surfaces can be considered acceptable.
  • This acceptable interference loss can be adjusted according to the circumstances, for example, based on the shapes of the first and/or second sealing surfaces, the presence of one or more other seals in the tubular connection, the intended operating conditions, or any other reason.
  • the lower tolerance zone is determined on the one hand by the corrected optimal relative position of the datum and, on the other hand, by a corrected lower bound, the lower tolerance zone extending over a distance corresponding to said corrected lower bound from the corrected optimal relative position in the direction of the distal end of said one among the first tubular component and the second tubular component comprising the marker.
  • This lower bound can be defined in many ways. For example, it can be defined arbitrarily, based on statistics of lower bounds considered acceptable. Preferably, this lower bound is determined based on the interference between the first and second sealing surfaces. Ideally, this lower bound is determined based on both the interference between the first and second sealing surfaces and the interference between the first and second threads.
  • the ST1 or ST2 inclination of such a flat sealing surface corresponds to the angle formed between this flat sealing surface and the longitudinal axis of the tubular connection.
  • the inclination of said toroidal sealing surface corresponds to the angle formed by a straight line connecting the junction points of said toroidal sealing surface with the portions of the tubular component located axially on either side of said toroidal sealing surface.
  • SI is a percentage of interference to the sealing
  • R1 is a loss of acceptable tolerance
  • STI is an inclination of the first sealing surface
  • ST2 is an inclination of the second sealing surface
  • TTdeg is an inclination of one of the first thread and the second thread, said one of the first thread and the second thread being arranged on the tubular component having the mark and Ti is a nominal interference between the first thread and the second thread at the target torque.
  • Such a lower limit taking into account on the one hand the interference between the sealing surfaces and, on the other hand, the interference between the threads, makes it possible to determine a lower limit of great precision, guaranteeing precisely that a minimum interference is ensured between the sealing surfaces when, in the assembled state of the tubular connection, the distal end of the tubular component not having the mark is radially at the mark between the corrected optimal relative position and the lower tolerance zone.
  • the thread inclination corresponds to the inclination of the crest and/or root.
  • the thread inclination corresponds to the inclination of a straight line passing through the same point on the root or crest of successive teeth. Teeth exhibiting singularities, such as imperfect teeth that do not allow a corresponding point to be defined on this line, are ignored in the definition of this inclination.
  • the tubular connection further includes a higher tolerance zone.
  • Such a high tolerance zone defines a range of relative positions between the tubular components, ensuring that there is no damage caused by excessive interference between the sealing surfaces. Furthermore, this high tolerance zone ensures the absence of inward deformation of the tubular connection due to overtightening of the tubular components, as such deformation could impede the passage of a measuring tool (known as "drift").
  • the upper tolerance zone is determined on the one hand by the corrected optimal relative position of the datum and, on the other hand, by an upper bound, the upper tolerance zone extending over a distance corresponding to said upper bound from the corrected optimal relative position in a direction away from a free end of said one among the first tubular component and the second tubular component comprising the datum.
  • This upper limit can be defined in many ways. For example, it can be defined arbitrarily, based on statistics of upper limits considered acceptable. Preferably, this upper limit is determined based on the interference between the first and second sealing surfaces. Ideally, this upper limit is determined based on both the interference between the first and second sealing surfaces and the interference between the first and second threads.
  • ST 1 / ST 2 ⁇ tan TT deg 2 2 ⁇ R 2 tan Max .
  • the first tubular component comprises a plurality of first sealing surfaces and the second tubular component comprises a plurality of second sealing surfaces.
  • the lower and upper limits are defined as described above for each sealing zone of the tubular connection. Such sealing zones are formed by one of the first and one of the second cooperating sealing surfaces.
  • the lower tolerance zone is then defined by the corrected optimal relative position and the minimum lower limit among all the lower limits.
  • the upper tolerance zone is then defined by the corrected optimal relative position and the minimum upper limit among all the upper limits.
  • the X-axis corresponds to the axis of revolution of the tubular components in the assembled state of the tubular connection, said X-axis also defining an axis of the tubular connection.
  • the "radial” orientation is directed orthogonally to the X-axis and the "axial” orientation is directed parallel to the X-axis.
  • Oil, gas, and other resource extraction requires a significant number of pipes, joined in pairs to form a wellhead. Due to the numerous stresses these pipes undergo during both installation and operation, they must adhere to specific standards to prevent degradation and leaks into the environment.
  • FIG. 1 illustrates a cross-sectional view of a tubular connection 1 according to an embodiment of the invention.
  • the tubular connection 1 is formed by assembling a first tubular component 2 with a second tubular component 3.
  • the first tubular component 2 comprises a first main body 4 and a first connecting portion 5.
  • the first connecting portion 5 is formed on an external surface of the first tubular component 2, the first tubular component 2 thus being referred to as the "male” (or “pin").
  • the first connecting portion 5 comprises, successively from the first main body 4 to a first free end 6 of the first tubular component 2, a first external sealing surface 7, a first thread 8, a first internal sealing surface 9, and then said first free end 6 of the first tubular component 2.
  • the second tubular component 3 comprises a second main body 10 and a second connecting portion 11.
  • the second connecting portion 11 is formed on an internal surface of the second tubular component 3, the second tubular component 3 thus being referred to as "female" (or “box").
  • the second connecting portion 11 comprises, successively from the second main body 10 to a second free end 12 of said second tubular component 3, a second internal sealing surface 13, a second thread 14, a second external sealing surface 15, and then said second free end 12.
  • the first thread 8 comprises a plurality of first teeth 16.
  • the first teeth 16 have a width, taken parallel to the X axis at an identical radial tooth height on each of said first teeth 16, that varies along the X axis. More particularly, said first teeth 16 have a width that increases along the X axis in a first direction oriented from the first free end 6 towards the first main body 4.
  • the first teeth 16 respectively have a first root 17, a first engagement flank 18, a first ridge 19 and a first loading flank 20.
  • the first engagement flanks 18 are turned towards the first free end 6.
  • the first loading flanks 20 are turned towards the first main body 4.
  • the second thread 14 comprises a plurality of second teeth 21 with variable tooth width, said second teeth 21 having an increasing width in a second direction oriented from the second free end 12 towards the second main body 10, the first and second directions thus being opposite with respect to the X axis.
  • the second 21 teeth have a second root 22, a second engagement flank 23 facing the second free end 12, a second crest 24 and a second loading flank 25 facing the second main body 10.
  • Figure 1 illustrates the tubular connection in the assembled state.
  • This assembled state is achieved by screwing together the first tubular component 2 and the second tubular component 3.
  • the first teeth 16 are engaged with the second teeth 21.
  • the first teeth 16 and the second teeth 21 are engaged with interference.
  • the first engagement flanges 18 interfere with the second engagement flanges 23, and the first loading flanges 20 interfere with the second loading flanges 25.
  • first internal sealing surface 9 and the second internal sealing surface 13 are in contact with interference in order to ensure the proper sealing of the tubular connection 1, in particular against fluids flowing inside the tubular connection 1.
  • the first external sealing surface 7 and the second external sealing surface 15 are also in contact with interference to ensure the proper sealing of the tubular connection 1, in particular against fluids outside the tubular connection 1.
  • a reference mark 26 is arranged on the first tubular component 2. More specifically, and as illustrated in the figure 2 , this reference point 26 is arranged on the external surface of the first main body 4.
  • Reference mark 26 has a nominal optimal relative position, that is, a theoretical position defined in the specifications for manufacturing the first tubular component 2.
  • This nominal optimal relative position is referred to as the nominal position in the following description.
  • This nominal position defines a relative position between the first tubular component 2 and the second tubular component 3, and more particularly between the second free end 12 and the first tubular component 2, in which the various elements of the first tubular component 2 and the second tubular component 3, in particular the sealing surfaces 7, 9, 13 and 15, are positioned so as to ensure optimal operation of the tubular connection 1.
  • Reference element 26 further includes a nominal lower limit and a nominal upper limit which define, on either side of the nominal position, acceptable relative positioning zones between the tubular components 2 and 3.
  • these nominal lower and upper limits can define an acceptable interference loss between the sealing surfaces 7, 9, 13, and 15, or conversely, a maximum acceptable interference limit relative to optimal interference.
  • this datum 26 is subject to the manufacturing tolerances of the first tubular component 2 and the second tubular component 3.
  • datum 26 is affected by the manufacturing tolerances of the threads 8 and 14, which influence the degree of interference between the flanks 18, 20, 23, and 25, and therefore the relative position between the first tubular component 2 and the second tubular component 3.
  • the nominal position, the nominal upper limit, and the nominal lower limit defining datum 26 are also themselves subject to manufacturing tolerances.
  • the sealing surfaces 7, 9, 13, and 15 are also subject to manufacturing tolerances. Thus, there is some uncertainty regarding the reliability of datum 26 in indicating the correct relative positioning of the sealing surfaces 7, 9, 13, and 15.
  • the marker 26 according to the invention is positioned according to the actual parameters of the tubular components 2 and 3.
  • the marker 26 is positioned on the first tubular component 2 according to the parameters of the first tubular component 2. and of the second tubular component 3 after their manufacture, these parameters being measured, calculated, or obtained by any other means.
  • the parameters relating to one of the tubular components 2 or 3 used in the equations below are the actual parameters of said tubular component 2 or 3, for example, measured after manufacture.
  • the parameters relating to the tubular connection 1, such as the target torque CC, the percentage of interference to the sealing SI, or the interference Ti between the first thread 8 and the second thread 14, are the nominal values of the tubular connection 1, i.e., theoretical values. These nominal values are taken at the target torque for the case of interference.
  • a corrected optimal relative position 27 is defined.
  • the reference mark 26 is arranged on the first tubular component not according to the nominal position but according to this corrected optimal relative position 27, hereinafter referred to as the corrected position 27.
  • This corrected position 27 is defined according to the nominal position defined in the specifications but also according to an external diameter OD of the first tubular component 2, a thickness Wt of the first tubular component 2, and the thread pitch PDF of the first thread 8.
  • the external diameter OD, the thickness Wt, and the thread pitch PDF are measured, calculated, or obtained by any other means on the first tubular component 2 after its manufacture; these are therefore the actual parameters of said first tubular component.
  • the corrected position 27 is also positioned according to the target torque CC of the tubular connection 1.
  • a positioning correction for the optimal relative position is calculated for the coordinate system.
  • the tolerance threshold ST can be determined in many ways. Preferably, this tolerance threshold ST can be determined arbitrarily, for example to a value of 96000, this value being suitable for all connections according to the invention.
  • a single tolerance threshold ST can also be calculated by analysis of the inclination of the threads as well as the thread pitches, in particular the "wedge ratio", that is to say a difference between the thread pitch of the engagement flanks and the thread pitches of the loading flanks.
  • the corrected position 27 takes into account the manufacturing tolerances of the first tubular component 2 and the tubular connection 1, so that this corrected position 27 corresponds to a relative positioning of the second free end 12 with respect to reference mark 26 in which the sealing surfaces 7, 9, 13 and 15 are indeed correctly positioned to ensure the sealing of the tubular connection 1.
  • the reference frame 26 arranged from the corrected position 27 has a corrected lower bound 28 and a corrected upper bound 29 which can be determined in many ways.
  • the corrected lower limit 28 and/or the corrected upper limit 29 can be determined by, respectively, a nominal lower limit and/or a nominal upper limit.
  • the reference mark 26 has lower and upper tolerance zones determined by the corrected position 27 and these nominal limits.
  • the corrected lower bound 28 and/or the corrected upper bound 29 can be determined on the basis of acceptable bound statistics.
  • the corrected lower bound 28 and/or the corrected upper bound 29 are also determined from the actual structural parameters of the tubular connection 1 in order to further improve the reliability and accuracy of the reference mark 26.
  • the corrected lower bound 28 is advantageously determined as a function of the desired minimum interference between the sealing surfaces 7, 9, 13 and 15.
  • the corrected upper bound 29 is advantageously corrected as a function of the desired interference between the sealing surfaces 7, 9, 13 and 15.
  • the lower limit is determined based on the desired minimum interference between sealing surfaces 7, 9, 13, and 15, but also based on the interference between threads 8 and 14.
  • the corrected upper limit 29 is determined according to the desired interference between the sealing surfaces 7, 9, 13 and 15 but also according to the interference between the threads 8 and 14.
  • a corrected lower bound is determined for each seal to obtain a plurality of corrected lower bounds.
  • the corrected lower bound used to define reference mark 26 is then the smallest corrected lower bound among this plurality of corrected lower bounds.
  • a corrected upper bound is calculated for each seal, and the corrected upper bound used to define reference mark 26 is the smallest corrected upper bound among the plurality of corrected upper bounds obtained as a function of the plurality of seals.
  • corrected limits are determined for the internal seal and corrected limits are determined for the external seal.
  • the corrected lower limit 28 of the reference mark 26 is then the smallest corrected lower limit among those determined for the internal seal and for the external seal.
  • the corrected upper limit 29 of the reference mark 26 is then the smallest corrected upper limit among those determined for the internal seal and for the external seal.
  • Such a corrected lower bound 28 thus takes into account the impact of the actual desired interference between the sealing surfaces to validate or reject a tubular connection 1.
  • the inclination of such a flat sealing surface corresponds to the angle formed between this flat sealing surface and the X axis of the tubular connection 1.
  • the inclination of said toroidal sealing surface corresponds to the angle formed by a straight line connecting the junction points of said toroidal sealing surface with the portions of tubular component located axially on either side of said toroidal sealing surface.
  • An acceptable interference loss between sealing surfaces can be determined based on the shape of the sealing surfaces, the desired performance of the tubular connection 1, or any other reason. This interference loss between sealing surfaces is, for example, 30%, meaning that a minimum interference of 70% is ensured by the corrected lower limit.
  • the maximum acceptable interference between sealing surfaces can be determined based on the shape of the sealing surfaces, the desired performance of the pipe connection, or other factors. This maximum acceptable interference between sealing surfaces is, for example, 40%.
  • Such a corrected upper limit thus takes into account the impact of the actual desired interference between the sealing surfaces to validate or reject a tubular connection 1.
  • ST 1 / ST 2 where SI is the percentage of interference to the sealing, R1 is the acceptable tolerance loss, ST1 is the inclination of the first sealing surface, ST2 is the inclination of the second sealing surface and TTdeg is an inclination of the thread corresponding to the tubular component on which the mark 26 is arranged and Ti is a nominal interference between the first thread and the second thread at the target torque of the connection.
  • Such a corrected lower limit taking into account on the one hand the interference of the sealing surfaces and, on the other hand, the interference between the threads, makes it possible to determine a corrected lower limit of great precision, guaranteeing precisely that a minimum interference is ensured in the assembled state of the tubular connection 1.
  • both the impact of the desired actual interference between the sealing surfaces and the impact of the actual interference between the threads are taken into account to reliably and accurately validate or reject a tubular connection.
  • THE figures 1 and 2 illustrate a tubular connection 1 in which the marker 26 is arranged on the external surface of the main body 4 of a first male-type tubular component 2 and allows said tubular connection to be validated according to the relative position of the second free end 12 with respect to the marker 26.
  • the invention applies in an analogous way in the context of tubular connections having other configurations.
  • FIG 3 illustrates the case of a tubular connection 1 called “flush”, that is to say whose external diameter is less than 101% of the external diameters of the tubular components 2 and 3 which form it.
  • the reference mark 26 is arranged on the external surface of the first connection portion 5 of the first tubular component 1. More specifically, the reference mark 26 is arranged between the first main body 4 and the first external sealing surface (not illustrated).
  • FIG. 4 This illustrates the case of a tubular connection 1 in which the marker 26 is located on the internal surface of the second tubular component 3, i.e., on the female-type tubular component 3.
  • This marker 26 then allows the tubular connection 1 to be validated or rejected depending on the relative position between the marker 26 and the first free end 6.
  • the marker 26 is then located on the internal surface of the second connection portion 11 axially between the second main body 10 and the second internal sealing surface 13.
  • tubular connection may have other characteristics not described above.
  • the tubular connection illustrated on the figure 1 includes an external groove to collect grease that can be applied to the tubular components
  • the first tubular component may include a chamfer connecting a face of the free end of the first tubular component and an internal surface of said first tubular component, etc.
  • the invention is applicable to integral or sleeve-coupled connections.
  • long tubular components have a male connecting element at one end and a female connecting element at the other, these long components being directly joined in pairs.
  • long tubular components have a male connecting element at each end, shorter tubular components called couplers have female connecting elements at each end, and two long tubular components are joined by means of a coupler.
  • Connections can be flush or semi-flush.
  • a flush connection is one whose external diameter is no more than 101% of the external diameter of the body of the tubular component attached to the connection.
  • a semi-flush connection is one whose external diameter is no more than 110% of the external diameter of the body of the tubular component attached to the connection.
  • the invention is also applicable in the context of a tubular connection comprising one or more sealing zones, located for example on either side of the threads and/or comprising a central sealing zone.
  • the roots and crests of the thread teeth can be parallel to the axis of the tubular connection or parallel to the angle of the threads.
  • Such teeth can have a dovetail profile, also called a "dovetail,” or a trapezoidal profile.
  • the marker can be made in different ways.
  • such a marker can be made by knurling, by machining a groove forming the visual marker, by laser marking, painting, by punching the marker or other means.
  • the corrected lower bound, and the bound corrected upper limit is the minimum value between the lower limits, respectively limit between the upper limits, calculated for each of the sealing zones.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Earth Drilling (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)
  • Gasket Seals (AREA)

Claims (10)

  1. Rohrverbindung (1), umfassend ein erstes rohrförmiges Bauteil (2) und ein zweites rohrförmiges Bauteil (3),
    wobei das erste rohrförmige Bauteil (2) ein erstes Gewinde (8) und eine erste Dichtfläche (9, 7) umfasst, wobei das erste Gewinde (8) eine variable Zahnbreite aufweist,
    wobei das zweite rohrförmige Bauteil (3) ein zweites Gewinde (14) und eine zweite Dichtfläche (13, 15) umfasst, wobei das zweite Gewinde (14) eine variable Zahnbreite aufweist,
    wobei das erste Gewinde (8) und das zweite Gewinde (14) in einem montierten Zustand der Rohrverbindung (1) in Eingriff stehen, wobei die erste Dichtfläche (7, 9) und die zweite Dichtfläche (13, 15) in dem montierten Zustand der Rohrverbindung (1) in dichtem Kontakt stehen, dadurch gekennzeichnet, dass
    das eine unter dem ersten rohrförmigen Bauteil (2) und dem zweiten rohrförmigen Bauteil (3) eine Markierung (26) umfasst, wobei die Markierung eine optimale relative Position zwischen dem ersten rohrförmigen Bauteil (2) und dem zweiten rohrförmigen Bauteil (3) aufweist,
    wobei die optimale relative Position der Markierung (26) eine korrigierte optimale relative Position (27) ist, wobei die korrigierte optimale relative Position (27) einer optimalen relativen Nennposition entspricht, auf die eine Korrektur angewandt wird, wobei die Korrektur von den Merkmalen des einen unter dem ersten rohrförmigen Bauteil (2) und dem zweiten rohrförmigen Bauteil (3), auf dem die Markierung angeordnet ist, sowie von einem Sollmoment der Rohrverbindung (1) abhängig ist.
  2. Rohrverbindung (1) nach Anspruch 1, wobei die Korrektur der folgenden Gleichung entspricht: Korrektur = 1 ST × OD Wt CC × PdF worin ST ein Toleranzschwellenwert ist, OD ein Außendurchmesser des einen unter dem ersten rohrförmigen Bauteil (2) und dem zweiten rohrförmigen Bauteil (3) ist, das die Markierung (26) umfasst, Wt eine Dicke des einen unter dem ersten rohrförmigen Bauteil (2) und dem zweiten rohrförmigen Bauteil (3) ist, das die Markierung (26) umfasst, CC ein Sollmoment der Rohrverbindung (1) ist, PdF eine Ganghöhe des Gewindes ist, das zu dem einen unter dem ersten rohrförmigen Bauteil (2) und dem zweiten rohrförmigen Bauteil (3) gehört, das die Markierung (26) umfasst.
  3. Rohrverbindung (1) nach Anspruch 1 oder 2, umfassend ferner einen unteren Toleranzbereich.
  4. Rohrverbindung (1) nach Anspruch 3, wobei der untere Toleranzbereich zum einen durch die korrigierte optimale relative Position (27) der Markierung (26) und zum anderen durch eine korrigierte untere Grenze (28) bestimmt wird, wobei sich der untere Toleranzbereich über einen Abstand erstreckt, welcher der korrigierten unteren Grenze (28) von der korrigierten optimalen relativen Position (27) aus in Richtung eines freien Endes (6, 12) des einen unter dem ersten rohrförmigen Bauteil (2) und dem zweiten rohrförmigen Bauteil (3), das die Markierung (26) umfasst, entspricht.
  5. Rohrverbindung (1) nach Anspruch 4, wobei die korrigierte untere Grenze (28) der folgenden Gleichung entspricht: untere Grenze = SI 2 × R 1 tan Max . ST 1 / ST 2 worin SI ein Prozentsatz der Interferenz bei Dichtigkeit ist, R1 ein akzeptabler Interferenzverlust ist, ST1 eine Neigung der ersten Dichtfläche (7, 9) ist, ST2 eine Neigung der zweiten Dichtfläche (13, 15) ist.
  6. Rohrverbindung (1) nach Anspruch 5, wobei die korrigierte untere Grenze gleich einem minimalen Wert zwischen einer ersten unteren Grenze und einer zweiten unteren Grenze ist, wobei die erste untere Grenze und die zweite untere Grenze den folgenden Gleichungen entsprechen: erste untere Grenze = SI 2 × R 1 tan Max . ST 1 / ST 2 , und wenn Ti − erste untere Grenze × tan TT deg 2 < 0 , dann zweite untere Grenze = 0 , und wenn Ti − erste untere Grenze × tan TT deg 2 ≥ 0 , dann zweite untere Grenze = SI − erste Grenze × tan TT deg 2 2 × R 1 tan Max . ST 1 / ST 2 worin SI ein Prozentsatz der Interferenz bei Dichtigkeit ist, R1 ein akzeptabler Toleranzverlust ist, ST1 eine Neigung der ersten Dichtfläche ist, ST2 eine Neigung der zweiten Dichtfläche ist und TTdeg eine Neigung des einen unter dem ersten Gewinde (8) und dem zweiten Gewinde (14) ist, wobei das eine unter dem ersten Gewinde (8) und dem zweiten Gewinde (14) an dem rohrförmigen Bauteil angeordnet ist, das die Markierung (26) umfasst, und Ti eine Nenninterferenz zwischen dem ersten Gewinde und dem zweiten Gewinde ist.
  7. Rohrverbindung (1) nach einem der vorhergehenden Ansprüche, umfassend ferner einen oberen Toleranzbereich.
  8. Rohrverbindung (1) nach Anspruch 7, wobei der obere Toleranzbereich zum einen durch die korrigierte optimale relative Position (27) der Markierung (26) und zum anderen durch eine korrigierte obere Grenze (29) bestimmt wird, wobei sich der obere Toleranzbereich über einen Abstand erstreckt, welcher der korrigierten oberen Grenze (29) von der korrigierten optimalen relativen Position (27) aus entlang einer Richtung entspricht, die sich von einem freien Ende (6, 12) des einen unter dem ersten rohrförmigen Bauteil (2) und dem zweiten rohrförmigen Bauteil (3), das die Markierung (26) umfasst, entfernt.
  9. Rohrverbindung nach Anspruch 8, wobei die obere Grenze der folgenden Gleichung entspricht: obere Grenze = SI 2 × R 2 tan Max . ST 1 / ST 2 worin SI ein Prozentsatz der Interferenz bei Dichtigkeit ist, R2 ein akzeptabler Toleranzverlust ist, ST1 eine Neigung der ersten Dichtfläche (7, 9) ist, ST2 eine Neigung der zweiten Dichtfläche (13, 15) ist.
  10. Rohrverbindung (1) nach Anspruch 9, wobei die korrigierte obere Grenze (29) gleich einem minimalen Wert zwischen einer ersten oberen Grenze und einer zweiten oberen Grenze ist, wobei die erste obere Grenze und die zweite obere Grenze den folgenden Gleichungen entsprechen: erste obere Grenze = SI 2 × R 2 tan Max . ST 1 / ST 2 wenn Ti − erste obere Grenze × tan TT deg 2 < 0 , dann zweite obere Grenze = 0, und wenn Ti − erste obere Grenze × tan TT deg 2 ≥ 0 , dann zweite obere Grenze = SI − SI 2 × R 2 tan Max . ST 1 / ST 2 × tan TT deg 2 2 × R 2 tan Max . ST 1 / ST 2 worin SI ein Prozentsatz der Interferenz bei Dichtigkeit ist, R2 ein akzeptabler Toleranzverlust ist, ST1 eine Neigung der ersten Dichtfläche (7, 9) ist, ST2 eine Neigung der zweiten Dichtfläche (13, 15) ist und TTdeg eine Neigung des einen unter dem ersten Gewinde (8) und dem zweiten Gewinde (14) ist, wobei das eine unter dem ersten Gewinde (8) und dem zweiten Gewinde (14) an dem rohrförmigen Bauteil angeordnet ist, das die Markierung (26) umfasst, und Ti eine Nenninterferenz zwischen dem ersten Gewinde und dem zweiten Gewinde ist.
EP23798487.7A 2022-11-07 2023-11-02 Rohrgewindeanschluss Active EP4616042B1 (de)

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FR2211563A FR3141715B1 (fr) 2022-11-07 2022-11-07 Connexion tubulaire filetée
PCT/EP2023/080593 WO2024099879A1 (fr) 2022-11-07 2023-11-02 Connexion tubulaire filetée

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CN120516391B (zh) * 2025-07-17 2025-11-11 成都飞机工业（集团）有限责任公司 管路装配过程拧紧曲线校正方法、装置、介质及设备

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LU51742A1 (de) * 1966-08-10 1968-03-25
CA2217269C (en) * 1997-10-01 2002-05-28 Centre For Engineering Research Inc. Swaged pin end of pipe connection
FR2800150B1 (fr) * 1999-10-21 2001-12-07 Vallourec Mannesmann Oil & Gas Joint tubulaire filette etanche a la pression exterieure
US8220842B2 (en) * 2003-05-30 2012-07-17 Vallourec Mannesmann Oil & Gas France Threaded tubular connection which is resistant to bending stresses
FR2868146B1 (fr) * 2004-03-26 2009-01-23 Vallourec Mannesmann Oil Gas F Joint filete tubulaire resistant aux contraintes de flexion
US8668233B2 (en) 2004-12-30 2014-03-11 Hydril Company Threaded connection with perturbed flanks
FR3030668B1 (fr) * 2014-12-19 2016-12-16 Vallourec Oil & Gas France Joint filete
FR3121492B1 (fr) * 2021-03-31 2023-02-24 Vallourec Oil & Gas France Dimensionnement d’un jeu axial de filetage

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EP4616042A1 (de) 2025-09-17
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CA3271451A1 (fr) 2024-05-16
AR130992A1 (es) 2025-02-05
ES3063912T3 (en) 2026-04-21
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CN120092123B (zh) 2026-01-06
MX2025005082A (es) 2025-06-02
CN120092123A (zh) 2025-06-03
FR3141715A1 (fr) 2024-05-10

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