EP3983637B1 - Drehmomentschulter für rohrförmige warenverbindung - Google Patents

Drehmomentschulter für rohrförmige warenverbindung Download PDF

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Publication number
EP3983637B1
EP3983637B1 EP20733420.2A EP20733420A EP3983637B1 EP 3983637 B1 EP3983637 B1 EP 3983637B1 EP 20733420 A EP20733420 A EP 20733420A EP 3983637 B1 EP3983637 B1 EP 3983637B1
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EP
European Patent Office
Prior art keywords
pin
torque shoulder
box
torque
shoulder surface
Prior art date
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Active
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EP20733420.2A
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English (en)
French (fr)
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EP3983637A1 (de
Inventor
Lucas GIRALDO
Richard Edgard BRAVO
Miguel Angel ROSSI
Gastón Mauro MAZZAFERRO
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.)
Tenaris Connections BV
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Tenaris Connections BV
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Publication date
Priority claimed from NL2023877A external-priority patent/NL2023877B1/en
Application filed by Tenaris Connections BV filed Critical Tenaris Connections BV
Publication of EP3983637A1 publication Critical patent/EP3983637A1/de
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Publication of EP3983637B1 publication Critical patent/EP3983637B1/de
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    • 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
    • E21B17/0423—Threaded with plural threaded sections, e.g. with two-step threads
    • 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

  • This disclosure relates to a tubular good connection between tubular good joints, in particular, threaded tubular connections for tubular goods used in a wellbore.
  • Threaded tubular goods connections are used to couple joints of tubing together for use in a wellbore.
  • a tubular goods connection couples a first tubular member with a box having an internal thread therein and a second tubular member with a pin having an external thread thereon.
  • a tubular goods connection couples a first tubular member having a threaded pin with a second tubular member with a pin having an external thread there using a coupling box connector having two boxes with mating internal threads disposed thereon.
  • a tubular goods connection can include a positive stop torque shoulder that acts as a load-bearing surface at the tubular goods connection.
  • US2014/284919 discloses a tubular threaded joint is constituted by a pin and a box each having a contact surface comprising an unthreaded metal contact portion including a seal portion and a shoulder portion and a threaded portion.
  • the surfaces of the seal portion and the shoulder portion has a first lubricating coating in the form of a solid lubricating coating
  • the surface of the threaded portion or the entire surface of the contact surface has a second lubricating coating selected from a viscous liquid lubricating coating and a solid lubricating coating.
  • the first lubricating coating has a coefficient of friction which is higher than that of the second lubricating coating, and the second lubricating coating is positioned on top in a portion where both the first lubricating coating and the second lubricating coating are present.
  • This disclosure describes roughened torque shoulders in threaded tubular good connections for tubular goods used in wellbores.
  • the surface roughness may relate to the arithmetic average roughness (Ra).
  • Ra arithmetic average roughness
  • micron is used, but it is also referred to as micrometer ( ⁇ m).
  • the surface roughness of the first torque shoulder surface can be between 100 microns and 500 microns.
  • the first torque shoulder surface can include a knurled surface profile. The knurled surface profile can be continuous along the first torque shoulder surface.
  • the first torque shoulder surface can include a laser cut, stamped, machined, or blasted surface profile.
  • One of the first pin or the first box can include the first torque shoulder surface, and the other of the first pin or the first box can include a second torque shoulder surface, the second torque shoulder surface to engage the first torque shoulder surface.
  • the second torque shoulder surface can include a surface roughness greater than or equal to 100 microns (e.g. between 100 microns and 500 microns).
  • the second torque shoulder surface can include a knurled surface profile.
  • the knurled surface profile can be continuous along the second torque shoulder surface.
  • the second torque shoulder surface can include a laser cut, stamped, machined, or blasted surface profile.
  • the first torque shoulder surface and the second torque shoulder surface can be at a respective one of a first longitudinal end of the first pin or a second longitudinal end of the first box.
  • the first longitudinal end of the first pin can be a distal longitudinal end of the first pin, and the second longitudinal end of the first box can be a proximal longitudinal end of the first box.
  • the first pin can include a third torque shoulder surface proximate to a third longitudinal end of the first pin opposite the first longitudinal end
  • the first box can include a fourth torque shoulder surface proximate to a fourth longitudinal end of the first box opposite the second longitudinal end
  • at least one of the third torque shoulder surface or the fourth torque shoulder surface can include a surface roughness greater than or equal to 100 microns (e.g. between 100 microns and 500 microns), the fourth torque shoulder surface to engage the third torque shoulder surface.
  • the at least one of the third torque shoulder surface or the fourth torque shoulder surface can include a knurled surface profile. The knurled surface profile can be continuous along the at least one of the third torque shoulder surface or the fourth torque shoulder surface.
  • the tubular connection can further include a second pin with a second external male threaded zone having second external male threads disposed on a portion of the second pin, and a coupling box connector comprising the first box and a second box, the second box having an internal female threaded zone having internal female threads disposed on a portion of the second box, the internal female threads to engage with the external male threads of the second pin, where the first pin has the first torque shoulder surface, and the second pin has a second torque shoulder surface, and where the second torque shoulder surface is to engage the first torque shoulder surface of the first pin.
  • the first torque shoulder surface can include a knurled surface profile. The knurled surface profile can be continuous along the first torque shoulder surface.
  • the first torque shoulder surface can include a laser cut, stamped, machined, or blasted surface profile.
  • the second torque shoulder surface can comprises a surface roughness greater than or equal to 100 microns, e.g. between 100 microns and 500 microns.
  • the second torque shoulder surface can include a knurled surface profile. The knurled surface profile can be continuous along the second torque shoulder surface.
  • the second torque shoulder surface can include a laser cut, stamped, machined, or blasted surface profile.
  • Certain aspects of the disclosure encompass a use of a tubular connection according to claim 14.
  • the use also includes engaging, with the first torque shoulder surface, the second torque shoulder surface to form a tubular connection, at least one of the first torque shoulder surface or the second torque shoulder surface including a surface roughness greater than or equal to 100 microns (e.g. between 100 microns and 500 microns).
  • At least one of the first torque shoulder surface or the second torque shoulder surface has a surface roughness greater than or equal to 100 microns (e.g. between 100 microns and 500 microns).
  • Certain aspects of the disclosure encompass a method for forming a pin or a box for a tubular connection according to claim 16.
  • the method includes providing a pin or box having a first torque shoulder surface, and modifying the first torque shoulder surface to have a surface roughness greater than or equal to 100 microns (e.g. between 100 microns and 500 microns).
  • Modifying the first torque shoulder surface can include at least one of knurling, laser cutting, stamping, machining, or blasting the first shoulder surface to the surface roughness of greater than or equal to 100 microns (e.g. between 100 microns and 500 microns).
  • a coupling box connector is a tubular element having a box at each end thereof.
  • This disclosure describes tubular good connections between threaded tubular good joints, where one or both of pin and box of the tubular good joints or the coupling box connector includes a torque shoulder (i.e., positive-stop torque shoulder) with a roughened shoulder surface.
  • the shoulder surface of the torque shoulder is also referred to as torque shoulder surface.
  • the torque shoulder surface is mechanically roughened, for example, via knurling or other mechanical manipulation, such that its surface roughness is increased.
  • the roughened surface of the torque shoulder can increase torque at a tubular goods connection, which can provide improved securement and hold of the tubular good connection, and an increased break-out torque of the tubular good connection.
  • a tubular good connection is formed between a threaded tubular good joint and a corresponding tubular good joint or connector (e.g., coupling box connector), where corresponding threading and corresponding torque shoulders provide load bearing surfaces in the made-up tubular good connection.
  • a tubular good joint includes threading (for example, radially external male threading, or radially internal female threading) and a torque shoulder with a roughened surface.
  • the torque shoulder surface is roughened by knurling, laser cutting, stamping, machining, blasting, a combination of these, or other surface roughening technique, so that the surface roughness of the torque shoulder is greater than or equal to 100 microns (e.g., between 100 microns and 500 microns).
  • the surface roughness relates to the arithmetic average roughness (Ra).
  • the term "micron” is used, but it is also referred to as micrometer ( ⁇ m).
  • torque shoulder surfaces of respective tubular good joints are typically smooth, for example, with a surface roughness of less than 40 microns.
  • Some conventional torque shoulder surfaces typically maintain a default, post-machined roughness when the respective tubular good joint is manufactured and machined. This default roughness is less than 40 microns, such as 10 to 40 microns.
  • at least one torque shoulder of a tubular good connection includes a roughened surface with a surface roughness greater than 100 microns (for example, via knurling, laser cutting, stamping, machining, blasting, or other technique).
  • the surface roughness is achieved by mechanical manipulation of the shoulder surface, as opposed to a chemical treatment to a surface, to increase the surface roughness of the shoulder surface.
  • the roughened surface can be easier to apply and be applied in a shorter amount of time than alternatives using a chemical or solvent.
  • the surface roughness of the present disclosure can be applied in a matter of seconds (e.g., 4 to 8 seconds), have a high accuracy of consistent and reliable roughness values, and can have little to no impact on health and the environment.
  • the example tubular goods connection 100 includes a first (lower) tubular member 400 with a pin 402 at an end, a coupling box connector 300 with a first box 301 at a first end and a second box 302 at a second end, and a second (upper) tubular member 200 with a pin 202.
  • FIG. 1 shows the example tubular goods connection 100 as a buttress thread connection; however, the type of tubular connection can be different, as described in more detail later.
  • the first box 301 of the coupling box connector 300 is configured to engage with and seal to the pin 402 of the first tubular member 400
  • the second box 302 of the coupling box connector 300 is configured to engage with and seal to the pin 202 of the second tubular member 200 to form the connection 100.
  • the coupling box connector 300, the first tubular member 400, and the second tubular member 200 form a portion of a casing configured for implementation in a wellbore.
  • the coupling box connector 300, the first tubular member 400 and second tubular member 200 can form a portion of another type of tubing.
  • FIG. 2A is a cross-sectional side view of the box 302 at one end of the coupling box connector of FIG. 1 shown separately.
  • FIG. 2B is a cross-sectional side view of the pin 202 at the end of the second tubular member 200 of FIG. 1 shown separately.
  • the coupling box connector 300 includes an internal thread 304 disposed along a portion of (e.g., an internal threaded zone of) the box 302, and includes a first torque shoulder 306 proximate to a proximal longitudinal end of the box 302.
  • the box 302 includes a distal longitudinal end at a (vertically) upper end of the box 302, and includes the proximal longitudinal end at a (vertically) lower end of the box 302 opposite the distal end.
  • the first torque shoulder 306 includes a shoulder surface 315, or load bearing surface, that can engage (e.g., contact) a corresponding load bearing surface of the second tubular member 200 when the coupling box connector 300 and the second tubular member 200 are made-up to form the example connection 100.
  • the shoulder surface 315 of the first torque shoulder 306 is also referred to as the first torque shoulder surface.
  • the first torque shoulder 306 forms a ring shape around the inner cylindrical diameter of the box 302.
  • the ring shape of the first torque shoulder 306 can be continuous around an entire circumference of the ring shape. However, in some instances, the ring shape can be non-continuous, or segmented.
  • the torque shoulder 306 can have a flat surface profile, a tapered conical surface profile, or a combination of both, with respect to a radial of the coupling box connector 300.
  • the second tubular member 200 includes an external thread 204 disposed along a portion of (e.g., an external threaded zone of) the pin 202, and a second torque shoulder 206 proximate to a distal longitudinal end of the pin 202.
  • the pin 202 includes the distal longitudinal end at a (vertically) lower end of the pin 202, and includes a proximal longitudinal end at an upper end of the pin 202 opposite the distal end.
  • the second torque shoulder 206 includes a shoulder surface 215, or load bearing surface, that can engage (e.g., contact) the shoulder surface 315 of the first torque shoulder 306 of the coupling box connector 300 when the pin 202 and box 302 are fully engaged.
  • the shoulder surface 215 of the second torque shoulder 206 is also referred to as the second torque shoulder surface.
  • the second torque shoulder 206 forms a ring shape around the cylindrical diameter of the pin 202 at the distal end of the second tubular member 200.
  • the ring shape of the second torque shoulder 206 can be continuous around an entire circumference of the ring shape. However, in some instances, the ring shape can be non-continuous, or segmented.
  • the torque shoulder 206 can have a flat surface profile, a tapered conical surface profile, or a combination of both, with respect to a radial of the coupling box connector 300.
  • the torque shoulder 206, torque shoulder 306, or other torque shoulder of the connection 100 can have a varying profile shape.
  • FIGS. 1-2B show the torque shoulders 206 and 306 as having a substantially flat surface profile that is (substantially or exactly) perpendicular to center longitudinal axis A-A. However, this surface profile shape can vary.
  • the surface profile of any of the torque shoulders of the connection 100 can include a slanted surface profile (i.e., that is angularly offset from a perpendicular of the longitudinal axis A-A), a jagged surface profile, a tapered surface profile with a rounded or pointed longitudinal end, a conical surface profile, a chamfered surface profile, a combination of these surface profiles, or another surface profile shape.
  • the torque shoulder surface can have a surface profile that is a combination tapered profile.
  • the shoulder surface 315 of the first torque shoulder 306, the shoulder surface 215 of the second torque shoulder 206, or both the shoulder surfaces 315, 215 of the first torque shoulder 306 and the second torque shoulder 206 can have a surface roughness greater than a minimum threshold roughness, such as 100 microns.
  • the surface roughness of one or more of the shoulder surfaces increases a sliding frictional force of surfaces abutting the one or more shoulder surfaces.
  • FIG. 5 is a partial top perspective view of the example coupling box connector 300 with the box 302 showing the shoulder surface 315 of the first torque shoulder 306.
  • the shoulder surface of the first torque shoulder 306 includes knurling 308 in the form of slanted lines arranged continuously along an entirety of the shoulder surface.
  • FIG. 5 provides a surface roughness of the shoulder surface that is at least 100 microns, for example, between 100 microns and 500 microns. While FIG. 5 shows the knurling as including a slanted-line pattern that provides a sequence of peaks and valleys that create the surface roughness, the knurling can take a variety of other forms. For example, the knurling can include a straight pattern, angular pattern, diamond pattern, bubble pattern, or other knurling pattern types with a varying pitch and/or coarseness.
  • figure 5 shows the roughening, in particular the knurling, according to the invention on the shoulder surface of the torque shoulder 306 of the box 302, additionally or alternatively, the roughening, in particular the knurling, with the same or a different pattern, may be provided on the shoulder surface of the second torque shoulder 206 of the pin 202
  • FIG. 3A is a partial schematic cross-sectional side view of the example tubular connection 100 of FIGs. 1-2B .
  • FIG. 3B shows in detail the coupling of the integral pin 202 of the second tubular member 200 and the box 302 of the coupling box connector 300. This coupling of the coupling box connector 300 and the second tubular member 200 is referred to in the art as making-up the tubular goods connection 100.
  • the internal thread 304 engages the external thread 204 via an interference fit of mating threads
  • the first torque shoulder 306 engages (i.e., contacts) the second torque shoulder 206 via an interference fit of the contacting shoulder surfaces 315, 215.
  • the internal thread 304 sealingly engages the external thread 204, for example, along all or a portion of the internal and/or external threaded zones.
  • sealing of the connection is provided by an elastomeric seal or a so-called metal-to-metal seal. Examples of connections with a metal-to-metal seal in combination with torque shoulder surfaces are illustrated in U.S. Patent Publication No. US2004/0108719 to Carcagno et al.
  • make-up or in the past tense “being made up” refers to the procedure of inserting into and engaging the pin 202 of the second tubular member 200 with the box 302 of the first tubular member 300, and screwing the members together through torque and rotation to obtain a "made-up connection” where the respective threadings engage each other and the respective torque shoulders engage each other.
  • the surface roughness of one or more shoulder surfaces of the torque shoulders provides an increased resistance to jump-out, or break-out, during use (i.e., increases break-out torque to disconnect the example connection).
  • the use of the threaded connection in combination with the roughened torque shoulders can be used in applications (such as downhole wellbore operations) where additional torque is required, such as in horizontal wells, deviated wells, or other wellbore locations.
  • additional torque gained from the roughened torque shoulders allows for less torque to be required by the respective mating threads of the connection.
  • the roughened torque shoulders can be implemented in thin-walled pipes where the radial dimension of the abutment surface is shorter than in thick-walled pipes.
  • utilizing roughened torque shoulders provides an amount of torque to the tubular goods connection that allows for the use of a casing or tubing with thinner walls with shorter threaded zones, since the roughened torque shoulders and the shorter threaded zones still provides sufficient minimum torque (i.e., minimum operative torque) to the tubular goods connection.
  • FIGS. 1-3B show the torque shoulders 206 and 306 as having a substantially flat surface profile that is (substantially or exactly) perpendicular to center longitudinal axis A-A.
  • this surface profile shape can vary.
  • the surface profile of any of the torque shoulders of the connection 100 can include a slanted surface profile (i.e., that is angularly offset from a perpendicular of the longitudinal axis A-A), a jagged surface profile, a tapered surface profile with a rounded or pointed longitudinal end, a conical surface profile, a chamfered surface profile, a combination of these surface profiles, or another surface profile shape.
  • FIG 4A A variant of the example tubular connection 100 is illustrated in FIG 4A . In FIG.
  • FIG. 4A a partial schematic cross-sectional side view of an example tubular connection 100' is shown that corresponds to the example tubular connection 100 shown in FIG. 3B , except that the torque shoulders 206' and 306' of the connection 100' include a slanted surface profile that is angularly offset from a perpendicular of the longitudinal axis A-A.
  • the coupling box connector 300, the second tubular joint 200, or both the coupling box connector 300 and the second tubular joint 200 include a torque shoulder on both longitudinal ends of the respective box 302 or pin 202.
  • FIG. 4B is a partial schematic cross-sectional side view of an example tubular connection 100".
  • the coupling box connector 300" includes two torque shoulders on opposite longitudinal ends of the box 302
  • the second tubular good joint 200 includes two torque shoulders on opposite longitudinal ends of the pin 202".
  • the coupling box connector 300" includes the first torque shoulder 306' on the proximal longitudinal end of the box 302", and further includes a third torque shoulder 310 at the distal end of the box 302'.
  • the second tubular good joint 200 includes the second torque shoulder 206' on the distal longitudinal end of the pin 202", and further includes a fourth torque shoulder 210 on the proximal longitudinal end of the pin 202".
  • One or more or all of the shoulder surfaces 315', 215', 325, 225 of the first torque shoulder 306', second torque shoulder 206', third torque shoulder 310, or fourth torque shoulder 210 can have a surface roughness greater than the minimum threshold roughness (e.g., 100 microns), as described earlier.
  • the third torque shoulder 310 forms a ring shape about the central axis A-A on the box 302", and the ring shape of the third torque shoulder 310 can be continuous around an entire circumference of the ring shape. However, in some instances, the ring shape can be non-continuous, or segmented.
  • the fourth torque shoulder 210 forms a ring shape about the central axis A-A on the pin 202", and the ring shape of the fourth torque shoulder 210 can be continuous around an entire circumference of the ring shape. However, in some instances, the ring shape can be non-continuous, or segmented.
  • the surface profile of the torque shoulder 310 can vary.
  • the torque shoulder 310 can have a flat surface profile, a tapered conical surface profile, or a combination of both, with respect to a radial of the coupling box connector 300".
  • connection 100' of FIG. 4A and connection 100" of FIG 4B The same apples to connection 100' of FIG. 4A and connection 100" of FIG 4B .
  • the coupling box connector 300 includes a radially inward flange 307 between the first box 301 and the second box 302 that can abut and engage shoulder surface 406 of the pin 402 of the first tubular member 400 and shoulder surface 206 of the pin 202 of the second tubular member 200.
  • the first tubular member 400 can be a first joint of casing 400 (or joint of tubing) having the pin 402 and the external male thread 404 disposed longitudinally on a portion of the pin 402.
  • the external thread 404 is configured to sealingly engage with the internal female thread 305 of the box 301 of the coupling box connector 300.
  • the second tubular member 200 can be a second joint of casing 200 (or joint of tubing) having the pin 202 with external male threading 204 disposed longitudinally on a portion of the pin 202.
  • the external thread 204 is configured to sealingly engage with the internal female thread 304 of the box 302 of the coupling box connector 300.
  • the second joint of casing 200 has an internal diameter D1 of an inner surface of the second joint of casing 200 that can be the same as an internal diameter of an inner surface of the first joint of casing 400.
  • the tubular connection 100 can be made up to connect the first tubular good joint 400 and the second tubular good joint 200 to the coupling box connector 300.
  • load flank designates the sidewall surface of a thread that faces away from the outer end of the respective pin or coupling member on which the thread is formed and supports all or a portion of the weight (i.e., tensile load) of the lower tubular member hanging in the wellbore.
  • stab flank designates the sidewall surface of the thread that faces toward the outer end of the respective pin or coupling member and supports forces compressing the joints toward each other such as the weight of the upper tubular member during the initial make-up of the joint.
  • Vanishing threads The portion at the end of the threaded portion in a threaded connection, in which threads are not cut full depth, but which provides a transition between full formed threads and pipe body. Theoretically, the vanishing point is the point in which the tapered pitch diameter of the thread intersects the outside pipe diameter ("OD").
  • a thread “lead” refers to the differential distance between components of a thread on consecutive threads.
  • the "stab lead” is the distance between stab flanks of consecutive thread pitches along the axial length of the connection.
  • a “load lead” is the distance between load flanks of consecutive thread pitches along the axial length of the connection.
  • FIG. 6 is a graph of an example torque curve 600 showing the torque of a tubular joint connection over rotations (or turns, n), more particularly, for a first, conventional tubular goods connection versus a tubular goods connection with a roughened torque shoulder.
  • Torque plot 602 shows an example torque curve for an example conventional tubular good connection (first connection), for example, that excludes a roughened torque shoulder.
  • the torque plot 602 shows the example torque curve of making up a pin and a box for an example conventional tubular good connection.
  • Torque plot 604 shows an example torque curve for an example tubular good connection (second connection) that includes a roughened torque shoulder, for example, such as example tubular good connection 100, 100', 100", as described earlier.
  • the torque plot 604 shows the example torque curve of making up a pin and a box, e.g. pin 202 of the second tubular member 200 and second box 302 of coupling box connector 300.
  • the same example torque curve could be for making up the pin 402 of the first tubular member 400 and the first box 301 of the coupling box connector 300.
  • the torque curve 600 shows the torque of the respective tubular good connection between an initial point of contact (where respective threads of the connection begin to engage each other) and a final position of the connection (where the respective threads and respective torque shoulders of the connection are fully engaged).
  • the torque plots 602 and 604 include a starting point, an inflection point (where corresponding torque shoulders begin to contact each other), and a final, fully made-up point.
  • Point 602a of torque plot 602 indicates the starting point for the make-up operation of the first tubular good connection.
  • Point 602b is referred to as the "shouldering torque,” and indicates the instance where a torque shoulder of a box of the connection abuts (i.e., first contacts) a torque shoulder of a pin of the connection.
  • Point 602c indicates the first operative torque 606 of the first connection, which refers to a torque value provided by the first connection when fully made-up (i.e., the end of the fastening operation between the pin and the box of the first connection).
  • the operative torque can be provided by a manufacturer of the connection.
  • Point 604a of torque plot 604 indicates the starting point for the make-up operation of the second tubular good connection.
  • Point 604b is the shouldering torque of the second connection, and indicates the instance where the torque shoulder with a roughened shoulder surface of a first tubular good joint of the second connection abuts (i.e., first contacts) a corresponding torque shoulder of a second tubular good joint of the second connection.
  • Point 604c indicates the second operative torque 608 of the second connection, which refers to the torque value provided by the second connection when fully made-up (i.e., the end of the fastening operation between the first tubular good joint and the second tubular good joint of the second connection).
  • the torque plots 602 and 604 are representative of the first connection and the second connection having the same size threading, same location of respective torque shoulders, and other similarities, with the only primary difference being that the second connection (torque plot 604) includes a roughened shoulder surface (e.g., surface roughness greater than or equal to 100 microns), whereas the first connection has a conventional shoulder surface (e.g., surface roughness of about 20 microns).
  • a roughened shoulder surface e.g., surface roughness greater than or equal to 100 microns
  • the first connection has a conventional shoulder surface (e.g., surface roughness of about 20 microns).
  • delta torque The difference in the torque values at point 602b and at point 602c (torque at 602b subtracted by torque at 602c) is referred to as "delta torque" for the first connection.
  • delta torque the difference in the torque values at point 604b and at point 604c (torque at 604b subtracted by torque at 604c) is referred to as delta torque for the second connection.
  • the segment of torque plot 602 between points 602a and 602b represents the gradual increase in torque of the first connection as corresponding threads are engaging. In this segment between 602a and 602b, the main resistance to the application of torque is the radial interference exerted by radial surfaces in contact with each other.
  • segment of torque plot 604 between points 604a and 604b represents the gradual increase in torque of the second connection as corresponding threads are engaging.
  • the main resistance to the application of torque is the radial interference exerted by radial surfaces in contact with each other.
  • the segment between 602a and 602b and the segment between 604a and 604b are (substantially or exactly) the same.
  • Points 602b and 604b are inflection points in the respective torque plots, where torque more steeply increases as the turns increase.
  • the segment of torque plot 602 between points 602b and 602c shows the sharp increase in torque caused by the energization of the abutment shoulders of the first connection.
  • the torque value drastically increases in a fraction of a turn compared to the preceding segment between points 602a and 602b, for example, because axial interference is overcome, which consumes the corresponding torque energy that is stored as elastic energy in the first connection.
  • the segment of torque plot 604 between points 604b and 604c show a sharp increase in torque caused by the energization of the abutment shoulders of the second connection.
  • This segment between 604b and 604c of torque plot 604 is steeper and reaches a higher operative torque 608 than the segment between 602b and 602b of torque plot 602, for example, because the surface roughness of the torque shoulder of the second connection provides an increased friction between the abutted shoulder surfaces, thereby increasing the torque energy that is stored as elastic energy in the second connection.
  • the operative torque 608 of the second connection is greater than the operative torque 606 of the first connection, and the delta torque of the second connection is larger than the delta torque of the first connection.
  • the delta torque can be a measure of the resistance of the connection to break out or undergo undesired unfastening.
  • the delta torque of the second connection is larger than the delta torque of the first connection, so the second connection has a larger break-out torque, and has increased resistance to undesired unfastening, than the first connection.
  • the value of the operative torque 608 of the second connection can be increased (from the first operative torque 606) without the risk to reach the material plastic limit 610 of the material (e.g., steel or other metal) that makes up the tubular good joints of the second connection.
  • the surface modification (i.e., surface roughening) of the torque shoulder generates enhanced tribological properties of the contact surfaces of the torque shoulder, which promotes an advantageous redistribution of stresses and deformations in the connection.
  • FIG. 7A is a flowchart describing an example method 700 for forming a connection, such as the tubular goods connection 100 of FIGs. 1-3B , tubular goods connection 100' of FIG. 4A , or tubular goods connection 100" of FIG. 4B .
  • a first pin is provided, the first pin including an external male threaded zone having external male threads disposed on a portion of the first pin.
  • a first box is provided, the first box including an internal female threaded zone having internal female threads disposed on a portion of the first box.
  • the internal female threads are to engage with the external male threads of the first pin, where one of the first pin and or the first box has a first torque shoulder surface, and the other of the first pin or the first box has a second torque shoulder surface.
  • the second torque shoulder surface engages with the first torque shoulder surface to form a tubular connection, where at least one of the first torque shoulder surface or the second torque shoulder surface includes a surface roughness greater than or equal to 100 microns.
  • FIG. 7B is a flowchart describing an example method 720 for forming a tubular connection, such as the tubular goods connection 100 of FIGs. 1-3B , tubular goods connection 100' of FIG. 4A , or tubular goods connection 100" of FIG. 4B .
  • a first pin with an external male threaded zone having external male threads disposed on a portion of the first pin is provided, the first pin having a first torque shoulder surface positioned proximate to a first longitudinal end of the first pin.
  • a second pin with an external male threaded zone having external male threads disposed on a portion of the second pin is provided, the second pin having a second torque shoulder surface positioned proximate to a second longitudinal end of the second pin.
  • At least one of the first torque shoulder surface or the second torque shoulder surface includes a surface roughness greater than or equal to 100 microns.
  • a coupling box connector is provided, the coupling box connector having a first box with an internal female threaded zone having internal female threads disposed on a portion of the first box, the internal female threads configured to engage with the external male threads of the first pin, and having a second box with an internal female threaded zone having internal female threads disposed on a portion of the second box, where the internal female threads are configured to engage with the external male threads of the second pin.
  • the external male threads of the first pin are engaged with the internal female threads of the first box.
  • the external male threads of the second pin are engaged with the internal female threads of the second box.
  • the first torque shoulder surface is engaged with the second torque shoulder surface.
  • FIG. 8 is a flowchart describing an example method 800 for forming a tubing joint such as the tubular joints 200, 200', 200", 400, or for forming a coupling box connector 300', 300" of FIGs. 1 -5B.
  • a pin or box is provided, the pin or the box having a first torque shoulder surface.
  • the first torque shoulder surface is modified to have a surface roughness greater than or equal to 100 microns.
  • tubular connections 100, 100', and 100"described herein above under reference to figures 1 to 4B are so-called “threaded and coupled” connections, wherein a pin at an end of a first tubular joint and a pin at and end of a second tubular joint are coupled via a coupling box connector having a box at both ends thereof.
  • a tubular connection in accordance with the present invention is a so-called "integral” connection, wherein an integral box at an end of a first tubular joint is coupled to an integral pin at an end of a second tubular joint.
  • An example of a tubular connection in accordance with the present invention that is of the "integral" type, is described herein below under reference to FIG. 9 .
  • the example tubular goods connection 1100 includes a first (lower) tubular member 1300 with an integral box 1302, and a second (upper) tubular member 1200 with an integral pin 1202.
  • FIG. 9 shows the example tubular goods connection 1100 as a wedge thread connection; however, the type of tubular connection can be different.
  • the thread profile can be a buttress profile such as in the example connections 100, 100' and 100" described herein above.
  • the threaded connection can be other thread profiles that can be used in combination with a torque shoulder.
  • the box 1302 of the first tubular member 1300 is configured to engage with and seal to the pin 1202 of the second tubular member 1200 to form the connection 1100.
  • the first tubular member 1300 and second tubular member 1200 form a portion of a casing configured for implementation in a wellbore.
  • the first tubular member 1300 and second tubular member 1200 can form a portion of another type of tubing.
  • FIG. 10A is a cross-sectional side view of the first tubular member 1300 of FIG. 9 shown separately.
  • FIG. 10B is a cross-sectional side view of the second tubular member 1200 of FIG. 9 shown separately.
  • the first tubular member 1300 includes an internal wedge thread 1304 disposed along a portion of (e.g., an internal wedge threaded zone of) the box 1302, and includes a first torque shoulder 1306 proximate to a proximal longitudinal end of the box 1302.
  • the box 1302 includes a distal longitudinal end at a (vertically) upper end of the box 1302, and includes the proximal longitudinal end at a (vertically) lower end of the box 1302 opposite the distal end.
  • the first torque shoulder 1306 includes a shoulder surface 1315, or load bearing surface, that can engage (e.g., contact) a corresponding load bearing surface of the second tubular member 1200 when the first tubular member 1300 and the second tubular member 1200 are made-up to form the example connection 1100.
  • the shoulder surface 1315 of the first torque shoulder 1306 is also referred to as the first torque shoulder surface.
  • the first torque shoulder 1306 forms a ring shape around the inner cylindrical diameter of the box 1302.
  • the ring shape of the first torque shoulder 1306 can be continuous around an entire circumference of the ring shape. However, in some instances, the ring shape can be non-continuous, or segmented.
  • the torque shoulder 1306 can have a flat surface profile, a tapered conical surface profile, or a combination of both, with respect to a radial of the tubular member 1300.
  • the second tubular member 1200 includes an external wedge thread 1204 disposed along a portion of (e.g., an external wedge threaded zone of) the pin 1202, and a second torque shoulder 1206 proximate to a distal longitudinal end of the pin 1202.
  • the pin 1202 includes the distal longitudinal end at a (vertically) lower end of the pin 1202, and includes a proximal longitudinal end at an upper end of the pin 1202 opposite the distal end.
  • the second torque shoulder 1206 includes a shoulder surface 1215, or load bearing surface, that can engage (e.g., contact) the shoulder surface 1315 of the first torque shoulder 1306 of the first tubular member 1300 when the pin 1202 and box 1302 are fully engaged.
  • the shoulder surface 1215 of the second torque shoulder 1206 is also referred to as the second torque shoulder surface.
  • the second torque shoulder 1206 forms a ring shape around the cylindrical diameter of the pin 1202 at the distal end of the second tubular member 1200.
  • the ring shape of the second torque shoulder 1206 can be continuous around an entire circumference of the ring shape. However, in some instances, the ring shape can be non-continuous, or segmented.
  • the torque shoulder 1206 can have a flat surface profile, a tapered conical surface profile, or a combination of both, with respect to a radial of the tubular member 1300.
  • FIGS. 9-10B show the torque shoulders 1206 and 1306 as having a substantially flat surface profile that is (substantially or exactly) perpendicular to center longitudinal axis A-A. However, this surface profile shape can vary.
  • the surface profile of any of the torque shoulders of the connection 1100 can include a slanted surface profile (i.e., that is angularly offset from a perpendicular of the longitudinal axis A-A), a jagged surface profile, a tapered surface profile with a rounded or pointed longitudinal end, a conical surface profile, a chamfered surface profile, a combination of these surface profiles, or another surface profile shape.
  • the torque shoulder surface can have a surface profile that is a combination tapered profile, such as illustrated in U.S. Patent No. 9,752,710 .
  • the shoulder surface 1315 of the first torque shoulder 1306, the shoulder surface 1215 of the second torque shoulder 1206, or both the shoulder surfaces 1315, 1215 of the first torque shoulder 1306 and the second torque shoulder 1206 can have a surface roughness greater than a minimum threshold roughness, such as 100 microns.
  • the surface roughness of one or more of the shoulder surfaces increases a sliding frictional force of surfaces abutting the one or more shoulder surfaces.
  • the surface roughness can be attained in a variety of ways, such as by knurling, laser cutting, stamping, machining, blasting, a combination of these, or another surface roughening technique (mechanical or other), so that the surface roughness of the respective shoulder surface is greater than or equal to 100 microns, such as between 100 microns and 500 microns.
  • FIG. 11 is a partial top perspective view of the example first tubular member 1300 with the box 1302 showing the shoulder surface 1315 of the first torque shoulder 1306.
  • the shoulder surface of the first torque shoulder 1306 includes knurling 1308 in the form of slanted lines arranged continuously along an entirety of the shoulder surface.
  • the example knurling 1308 of FIG. 11 provides a surface roughness of the shoulder surface that is at least 100 microns, for example, between 100 microns and 500 microns.
  • FIG. 11 shows the knurling as including a slanted-line pattern that provides a sequence of peaks and valleys that create the surface roughness
  • the knurling can take a variety of other forms.
  • the knurling can include a straight pattern, angular pattern, diamond pattern, bubble pattern, or other knurling pattern types with a varying pitch and/or coarseness.
  • the integral pin 1202 is inserted into the integral box 1302 to engage the corresponding threading and the corresponding torque shoulders.
  • the integral pin 1202 of the second tubular member 1200 is inserted into the integral box 1302 of the first tubular member 1300 and the second tubular member 1200 is rotated, the external wedge thread 1204 and the internal wedge thread 304 threadingly engage (e.g., corresponds to and mate) to form the tubular goods connection 1100.
  • the integral pin 1202 is rotated relative to the integral box 1302 toward a maximum rotation for complete engagement, the respective torque shoulder surfaces approach and abut each other.
  • the shoulder surface 1315 of the first torque shoulder 1306 engages with (e.g., contacts, or abuts) the shoulder surface 1215 of the second torque shoulder 1206.
  • the internal wedge thread 1304 engages the external wedge thread 1204 via an interference fit of the mating wedge threads
  • the first torque shoulder 1306 engages (i.e., contacts) the second torque shoulder 1206 via an interference fit of the contacting shoulder surfaces 1315, 1215.
  • the internal wedge thread 1304 sealingly engages the external wedge thread 1204, for example, along all or a portion of the internal and/or external threaded zones.
  • Wedge threads regardless of a particular type, increase in width W1, W2 in opposite directions on a pin member and a box member.
  • the threads have a dovetail wedge thread profile characterized by having a width of a tooth crest WTC wider than a width of teeth WTR, so it can also be said that both flanks, stab and load flanks, are negative.
  • the threads can take on other profiles and shapes.
  • interference type interference type or clearance type
  • the wedging effect generated on interference wedge threads is due to specific axial interference fit between mating load and stab flanks.
  • the wedging effect can also be achieved without this specific design interference (e.g. clearance wedge type) by, for example, thread drunkenness and/or radial interference, for example by radial interference between crests and roots.
  • flanks come closer to each other (i.e., clearance decreases or interference increases) during make-up.
  • Indeterminate make-up allows for the flank interference to be increased by increasing the make-up torque on the connection. This increased make up torque will produce some drawbacks because said increased make up torque will generate a higher general stress state due to the higher flank to flank interference that will lead to high contact pressures between sliding elements (during make-up), and also between assembly elements (e.g., at the end of make-up).
  • the wedging effect generated on interference wedge threads is due to specific interference fit between at least part of mating load and stab flanks of at least part of the threaded portion.
  • connection 1100 An example making up of the connection 1100 is as follows. Internal thread of box 1302 has stab flanks, load flanks, roots, and crests. The thread increases in width progressively at a uniform rate in one direction substantially the entire helical length of thread. External thread of pin 1202 has stab flanks, load flanks, roots, and crests. The thread increases in width progressively at a uniform rate in the other direction substantially the entire helical length of thread. The oppositely increasing thread widths and the taper of threads, cause the complementary roots and crests of the respective threads to move into engagement during make-up of the connection 1100. Root and crest engagement is followed by the moving of complementary stab and load flanks into engagement upon make-up of the connection.
  • the moving of complementary flanks, roots and crests into engagement forms sealing surfaces that resist the flow of fluids between the threads.
  • the torque shoulder surfaces of the torque shoulders 1206 and 1306 move into engagement upon make-up of the connection.
  • the torque shoulder engagement may occur simultaneously with the stab and load flanks moving into engagement.
  • the stab and load flanks may move into engagement after root and crest engagement during make-up of the connection and followed by the torque shoulder surface engagement upon make-up of the connection.
  • the torque shoulder surfaces upon initial make-up the torque shoulder surfaces are at an axial distance from each other.
  • the torque shoulder surfaces may then during use, i.e. in the well, engage in case torque applied to the connection exceeds the torque resistance of the wedge thread.
  • the torque shoulder surfaces thus serve as a backup for over-torque conditions during use.
  • FIGs. 12A and 12B show a further variant of the example tubular connections of FIGs. 1 to 11 .
  • the example tubular connection 500 of FIGs 12A and 12B is a threaded and coupled type connection similar to the example tubular connections 100, 100' and 100" shown in and described under reference to FIGs. 1 to 8 , however the coupling box connector 502 of tubular connection 500 does not have a radially inward flange between the first box 504a and the second box 504b.
  • the thread profile of the tubular connection 500 is a wedge profile like the thread profile of example connection 1100 of figures 9 to 11 .
  • FIG. 12A is a schematic cross-sectional side view of an example tubular good connection 500 with an example coupling box connector 502.
  • FIG. 12B is an enlarged schematic cross-sectional side view of the example made-up tubular good connection 500 of FIG. 12A .
  • the first box 504a of the coupling box connector 502 is configured to engage with and seal to the first pin 512 of the first tubular member 510
  • the second box 504b of the coupling box connector 502 is configured to engage with and seal to the second pin 1522 of the second tubular member 520 to form the example connection 500.
  • the coupling box connector 502 includes a first internal wedge thread 506a disposed along a portion of (e.g., a first internal wedge threaded zone of) the first box 504a, and includes a second internal wedge thread 506b disposed along a portion of (e.g., a second internal wedge threaded zone of) the second box 504b.
  • the first tubular member 510 includes a first external thread 514 disposed along a portion of (e.g., a first external wedge threaded zone of) the first pin 512, and a first torque shoulder 516 proximate to a distal longitudinal end of the first pin 512.
  • the first pin 512 includes the distal longitudinal end at a terminal end of the pin 512, and includes a proximal longitudinal end at an opposite longitudinal end of the pin 512 opposite the distal end.
  • the first torque shoulder 516 includes a shoulder surface 515, or load bearing surface, that can engage (e.g., contact) a shoulder surface of the second tubular member 520.
  • the shoulder surface 515 of the first torque shoulder 516 is also referred to as the first torque shoulder surface.
  • the first torque shoulder 516 forms a ring shape around the cylindrical diameter of the pin 512 at the distal end of the first tubular member 510.
  • the ring shape of the first torque shoulder 516 can be continuous around an entire circumference of the ring shape. However, in some instances, the ring shape can be non-continuous, or segmented.
  • the surface profile of the torque shoulder 516 can vary.
  • the torque shoulder 516 can have a flat surface profile, a tapered conical surface profile, or a combination of both, with respect to a radial of the tubular member 510.
  • the second tubular member 520 includes a second external wedge thread 524 disposed along a portion of (e.g., a second external wedge threaded zone of) the second pin 522, and a second torque shoulder 526 proximate to a distal longitudinal end of the fourth pin 522.
  • the second pin 522 includes the distal longitudinal end at a terminal end of the pin 522, and includes a proximal longitudinal end at an opposite longitudinal end of the pin 522 opposite the distal end.
  • the second torque shoulder 526 includes a shoulder surface 535, or load bearing surface, that can engage (e.g., contact) the shoulder surface 515 of the first torque shoulder 516 of the first tubular member 510.
  • the shoulder surface 535 of the second torque shoulder 526 is also referred to as the second torque shoulder surface.
  • the second torque shoulder 526 forms a ring shape around the cylindrical diameter of the second pin 522 at the distal end of the second tubular member 520.
  • the ring shape of the second torque shoulder 526 can be continuous around an entire circumference of the ring shape. However, in some instances, the ring shape can be non-continuous, or segmented.
  • the surface profile of the torque shoulder 526 can vary.
  • the torque shoulder 526 can have a flat surface profile, a tapered conical surface profile, or a combination of both, with respect to a radial of the tubular member 520.
  • the shoulder surface 515 of the first torque shoulder 516, the shoulder surface 535 of the second torque shoulder 526, or both the shoulder surfaces 515, 535 of the first torque shoulder 516 and the second torque shoulder 526 can have a surface roughness greater than the minimum threshold roughness, described earlier.
  • the first pin 512 is inserted into the first box 504a to engage the corresponding threading
  • the second pin 522 is inserted into the second box 504b to engage the corresponding threading
  • the first torque shoulder 516 and the second torque shoulder 526 engage (i.e., contact) each other.
  • the respective torque shoulder surfaces of the pins 512 and 522 approach each other.
  • the shoulder surface 515 of the first torque shoulder 516 engages with (e.g., contacts) the shoulder surface 535 of the second torque shoulder 526.
  • FIG. 12B shows this contacting engagement.
  • the coupling of the first tubular member 510 and the second tubular member 520 with the coupling box connector 502 can be referred to in the art as making-up the tubular goods connection 500.
  • the first internal wedge thread 506a engages the first external wedge thread 514 via an interference fit of the mating wedge threads
  • the second internal wedge thread 506b engages the second external wedge thread 524 via an interference fit of the mating wedge threads
  • the first torque shoulder 516 engages (i.e., contacts) the second torque shoulder 526 via an interference fit of the contacting shoulder surfaces 515, 535.
  • the coupling box connector 502 can include a positive-stop torque shoulder that engages one or both of the shoulder surfaces of the first tubular member 510 and/or second tubular member 520.
  • the coupling box connector 502 can include a radially inward flange between the first box 504a and the second box 504b that can abut and engage the shoulder surfaces 515, 535 of the first torque shoulder 516 and the second torque shoulder 526 (instead of the first torque shoulder 516 directly abutting and engaging the second torque shoulder 526).
  • connection 500 is shown in made-up state.
  • the torque shoulder surfaces are at an axial distance from each other.
  • the torque shoulder surfaces may then during use, i.e. in the well, engage in case torque applied to the connection exceeds the torque resistance of the wedge thread.
  • the torque shoulder surfaces thus serve as a backup for over-torque conditions during use. Examples of connections with wedge threads wherein upon make-up torque shoulder surfaces are at an axial distance from each other are illustrated in U.S. Patent Publication No. US2017/0314596 to Harvey et al.
  • FIGs. 12A and 12B show the example connection 500 as a wedge thread connection; however, the type of tubular connection can be different.
  • the thread profile can be a buttress profile such as in the example connections 100, 100' and 100" described herein above.
  • the thread profile of the connection can be other thread profiles that can be used in combination with a torque shoulder.
  • the thread profile of the connection can be other thread profiles that can be used in combination with a torque shoulder.
  • the torque shoulder surfaces can be at another location than at a longitudinal end of a pin or a box.
  • the torque shoulder surfaces can be located at a location between the longitudinal ends of a pin or a box, for instance at a location between two axially separated threaded zones of a pin or a box. Examples of connections with torque shoulder surfaces between two axially separated threaded zones of a pin or a box are illustrated in U.S. Patent Publication No. US2010/0181763 to Mallis et al.

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Claims (16)

  1. Rohrförmige Verbindung (100), die Folgendes umfasst:
    einen ersten Stift (202) mit einem Außengewindebereich, der ein Außengewinde aufweist, das auf einem Abschnitt des Stifts angeordnet ist; und
    ein erstes Gehäuse (302) mit einem Innengewindebereich, der ein Innengewinde aufweist, das auf einem Abschnitt des ersten Gehäuses angeordnet ist, wobei das Innengewinde so konfiguriert ist, dass es in das Außengewinde des ersten Stifts eingreift;
    dadurch gekennzeichnet, dass mindestens einer von dem ersten Stift oder dem ersten Gehäuse eine erste Drehmomentschulterfläche (315, 515, 1315) umfasst, die eine Oberflächenrauhigkeit von mehr als oder gleich 100 Mikron aufweist.
  2. Rohrförmige Verbindung nach Anspruch 1, wobei die erste Drehmomentschulterfläche (315, 515, 1315) ein gerändeltes Oberflächenprofil aufweist.
  3. Rohrförmige Verbindung nach Anspruch 2, wobei das gerändelte Oberflächenprofil entlang der ersten Drehmomentschulterfläche (315, 515, 1315) durchgehend ist.
  4. Rohrförmige Verbindung nach einem der vorhergehenden Ansprüche, wobei die erste Drehmomentschulterfläche ein lasergeschnittenes, gestanztes, bearbeitetes oder gestrahltes Oberflächenprofil aufweist.
  5. Rohrförmige Verbindung nach einem der vorhergehenden Ansprüche, wobei entweder der erste Stift (202) oder das erste Gehäuse (302) die erste Drehmomentschulterfläche (315, 515, 1315) aufweist und das andere Element, entweder der erste Stift oder das erste Gehäuse, eine zweite Drehmomentschulterfläche (215, 535, 1215) aufweist, wobei die zweite Drehmomentschulterfläche so gestaltet ist, dass sie mit der ersten Drehmomentschulterfläche in Eingriff kommt.
  6. Rohrförmige Verbindung nach Anspruch 5, wobei die zweite Drehmomentschulterfläche (215, 535, 1215) eine Oberflächenrauhigkeit von mehr als oder gleich 100 Mikrometer, z. B. zwischen 100 Mikrometer und 500 Mikrometer, aufweist.
  7. Rohrförmige Verbindung nach Anspruch 5 oder 6, wobei die zweite Drehmomentschulterfläche (215, 535, 1215) ein gerändeltes Oberflächenprofil aufweist.
  8. Rohrförmige Verbindung nach einem der Ansprüche 5 bis 7, wobei sich die erste Drehmomentschulterfläche (315, 515, 1315) und die zweite Drehmomentschulterfläche (215, 535, 1215) jeweils an einem ersten Längsende des ersten Stiftes (202) oder einem zweiten Längsende des ersten Gehäuses (302) befinden, wobei das erste Längsende des ersten Stiftes ein distales Längsende des ersten Stiftes ist und das zweite Längsende des ersten Gehäuses ein proximales Längsende des ersten Gehäuses ist.
  9. Rohrförmige Verbindung nach Anspruch 8, wobei der erste Stift eine dritte Drehmomentschulterfläche (325) in der Nähe eines dritten Längsendes des ersten Stiftes gegenüber dem ersten Längsende aufweist, das erste Gehäuse eine vierte Drehmomentschulterfläche (225) in der Nähe eines vierten Längsendes des ersten Gehäuses gegenüber dem zweiten Längsende aufweist und mindestens eine der dritten Drehmomentschulterfläche oder der vierten Drehmomentschulterfläche eine Oberflächenrauhigkeit von mehr als oder gleich 100 Mikrometer, z.B. zwischen 100 Mikrometer und 500 Mikrometer, aufweist, wobei die vierte Drehmomentschulterfläche so konfiguriert ist, dass sie mit der dritten Drehmomentschulterfläche in Eingriff kommt.
  10. Rohrförmige Verbindung nach Anspruch 9, wobei mindestens eine der dritten Drehmomentschulterfläche (325) oder der vierten Drehmomentschulterfläche (225) ein gerändeltes Oberflächenprofil aufweist.
  11. Rohrförmige Verbindung nach einem der Ansprüche 1-4, die ferner Folgendes umfasst:
    einen zweiten Stift (522) mit einem zweiten Außengewindebereich, der ein zweites Außengewinde aufweist, das auf einem Abschnitt des zweiten Stifts angeordnet ist; und
    einen Kupplungsgehäuseverbinder (502), der das erste Gehäuse (504a) und ein zweites Gehäuse (504b) umfasst, wobei das zweite Gehäuse einen Innengewindebereich aufweist, der ein Innengewinde aufweist, das auf einem Abschnitt des zweiten Gehäuses angeordnet ist, wobei das Innengewinde so konfiguriert ist, dass es mit dem Außengewinde des zweiten Stifts in Eingriff kommt;
    wobei der erste Stift (512) die erste Drehmomentschulterfläche (515) aufweist; und
    der zweite Stift (522) eine zweite Drehmomentschulterfläche (535) aufweist, wobei die zweite Drehmomentschulterfläche so konfiguriert ist, dass sie mit der ersten Drehmomentschulterfläche des ersten Stifts in Eingriff kommt.
  12. Rohrförmige Verbindung nach Anspruch 11, wobei die zweite Drehmomentschulterfläche eine Oberflächenrauhigkeit von mehr als oder gleich 100 Mikrometer, z. B. zwischen 100 Mikrometer und 500 Mikrometer, aufweist.
  13. Rohrförmige Verbindung nach einem der vorhergehenden Ansprüche, wobei die Oberflächenrauhigkeit der ersten Drehmomentschulterfläche zwischen 100 Mikrometer und 500 Mikrometer beträgt.
  14. Verwendung einer rohrförmigen Verbindung, die Folgendes umfasst:
    Bereitstellen eines ersten Stifts (202) mit einem Außengewindebereich, der ein Außengewinde aufweist, das auf einem Abschnitt des ersten Stifts angeordnet ist;
    Bereitstellen eines ersten Gehäuses (302) mit einem Innengewindebereich, der ein Innengewinde aufweist, das auf einem Abschnitt des ersten Gehäuses angeordnet ist, wobei das Innengewinde so konfiguriert ist, dass es mit dem Außengewinde des ersten Stifts in Eingriff kommt;
    wobei entweder der erste Stift oder das erste Gehäuse eine erste Drehmomentschulterfläche (315, 1315) aufweist; und
    das andere von dem ersten Stift oder dem ersten Gehäuse eine zweite Drehmomentschulterfläche (215, 1215) aufweist; und
    die zweite Drehmomentschulterfläche mit der ersten Drehmomentschulterfläche in Eingriff gebracht wird, um eine rohrförmige Verbindung zu bilden, dadurch gekennzeichnet, dass mindestens eine von der ersten Drehmomentschulterfläche oder der zweiten Drehmomentschulterfläche eine Oberflächenrauheit von mehr als oder gleich 100 Mikrometer aufweist.
  15. Verwendung einer rohrförmigen Verbindung, die Folgendes umfasst:
    Bereitstellen eines ersten Stifts (512) mit einem Außengewindebereich mit einem Außengewinde, das auf einem Abschnitt des ersten Stifts angeordnet ist, wobei der erste Stift eine erste Drehmomentschulterfläche (515) aufweist, die in der Nähe eines ersten Längsendes des ersten Stifts angeordnet ist;
    Bereitstellen eines zweiten Stiftes (522) mit einer Außengewindezone mit einem Außengewinde, das auf einem Abschnitt des zweiten Stiftes angeordnet ist, wobei der zweite Stift eine zweite Drehmomentschulterfläche (535) aufweist, die in der Nähe eines zweiten Längsendes des zweiten Stiftes angeordnet ist;
    wobei mindestens eine der ersten Drehmomentschulterfläche oder der zweiten Drehmomentschulterfläche eine Oberflächenrauheit von mehr als oder gleich 100 Mikrometer aufweist;
    Bereitstellen eines Kupplungsgehäuseverbinders (502) mit einem ersten Gehäuse (504a) mit einem Innengewindebereich mit einem Innengewinde, das auf einem Abschnitt des ersten Gehäuses angeordnet ist, wobei das Innengewinde so konfiguriert ist, dass es mit dem Außengewinde des ersten Stifts in Eingriff kommt, und mit einem zweiten Gehäuse (504b) mit einem Innengewindebereich mit einem Innengewinde, das auf einem Abschnitt des zweiten Gehäuses angeordnet ist, wobei das Innengewinde so konfiguriert ist, dass es mit dem Außengewinde des zweiten Stifts in Eingriff kommt;
    Ineingriffbringen des Außengewindes des ersten Stifts mit dem Innengewinde des ersten Gehäuses;
    Ineingriffbringen des Außengewindes des zweiten Stifts mit dem Innengewinde des zweiten Gehäuses; und
    Ineingriffbringen der ersten Drehmomentschulterfläche (515) mit der zweiten Drehmomentschulterfläche (535).
  16. Verfahren zum Formen eines Stiftes oder eines Gehäuses für eine rohrförmige Verbindung, wobei das Verfahren Folgendes umfasst:
    Bereitstellen eines Stiftes oder eines Gehäuses mit einer ersten Drehmomentschulterfläche;
    gekennzeichnet durch ein Modifizieren der ersten Drehmomentschulterfläche derart, dass sie eine Oberflächenrauhigkeit von mehr als oder gleich 100 Mikron aufweist, und wobei, vorzugsweise, das Modifizieren der ersten Drehmomentschulterfläche mindestens eines der folgenden Schritte umfasst: Rändeln, Laserschneiden, Stanzen,
    maschinelles Bearbeiten oder Strahlen der ersten Schulterfläche auf eine Oberflächenrauhigkeit von mehr als oder gleich 100 Mikron.
EP20733420.2A 2019-06-17 2020-06-17 Drehmomentschulter für rohrförmige warenverbindung Active EP3983637B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201962862485P 2019-06-17 2019-06-17
NL2023877A NL2023877B1 (en) 2019-09-23 2019-09-23 Torque shoulder for tubular goods connection
PCT/EP2020/066674 WO2020254349A1 (en) 2019-06-17 2020-06-17 Torque shoulder for tubular goods connection

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EP3983637A1 EP3983637A1 (de) 2022-04-20
EP3983637B1 true EP3983637B1 (de) 2023-09-06

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US (1) US20230122987A1 (de)
EP (1) EP3983637B1 (de)
BR (1) BR112021025575A2 (de)
CA (1) CA3142858A1 (de)
CO (1) CO2021016917A2 (de)
EC (1) ECSP21090730A (de)
MX (1) MX2021015522A (de)
PE (1) PE20220324A1 (de)
WO (1) WO2020254349A1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5498035A (en) * 1990-01-19 1996-03-12 Blose; Thomas L. Pipe coupling
JPH0699354A (ja) * 1992-09-22 1994-04-12 Kawasaki Steel Corp 鋼管継手の表面処理方法
US7690696B2 (en) 1999-04-19 2010-04-06 Hydril Company Wedge thread with torque shoulder
JP3876656B2 (ja) * 2001-07-13 2007-02-07 住友金属工業株式会社 管用ねじ継手
ITRM20020445A1 (it) 2002-09-06 2004-03-07 Tenaris Connections Bv Giunzione filettata per tubi.
JP5722752B2 (ja) * 2011-11-18 2015-05-27 新日鐵住金株式会社 高トルク締結性能に優れた管状ねじ継手
US11047413B2 (en) 2016-04-27 2021-06-29 Hydril Company Threaded and coupled tubular goods connection

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BR112021025575A2 (pt) 2022-02-01
US20230122987A1 (en) 2023-04-20
CO2021016917A2 (es) 2022-01-17
CA3142858A1 (en) 2020-12-24
MX2021015522A (es) 2022-02-03
ECSP21090730A (es) 2022-01-31
WO2020254349A1 (en) 2020-12-24
PE20220324A1 (es) 2022-03-14
EP3983637A1 (de) 2022-04-20

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