WO2013192058A2 - Connexion de tube conducteur - Google Patents

Connexion de tube conducteur Download PDF

Info

Publication number
WO2013192058A2
WO2013192058A2 PCT/US2013/046049 US2013046049W WO2013192058A2 WO 2013192058 A2 WO2013192058 A2 WO 2013192058A2 US 2013046049 W US2013046049 W US 2013046049W WO 2013192058 A2 WO2013192058 A2 WO 2013192058A2
Authority
WO
WIPO (PCT)
Prior art keywords
box
pin
threads
connection
neck
Prior art date
Application number
PCT/US2013/046049
Other languages
English (en)
Other versions
WO2013192058A4 (fr
WO2013192058A3 (fr
Inventor
John D. Watts
Original Assignee
WATTS RAMOS, Beverly
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 WATTS RAMOS, Beverly filed Critical WATTS RAMOS, Beverly
Publication of WO2013192058A2 publication Critical patent/WO2013192058A2/fr
Publication of WO2013192058A3 publication Critical patent/WO2013192058A3/fr
Publication of WO2013192058A4 publication Critical patent/WO2013192058A4/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/06—Screw-threaded joints; Forms of screw-threads for such joints characterised by the shape of the screw-thread
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings

Definitions

  • This invention may be used wherever there is a need to stab and tighten threaded connections quickly and/or with minimum damage thereto, especially on large diameter threads,
  • the connector disclosed herein will stab quickly without a stab guide and make-up in less than one turn to an selected torque within its wide acceptable torque range without the use of special equipment, and not loosen in service, ibis simple connector has features that allow it to replace numerous complicated types now being used.
  • the thread form allows for a deep stab and a makeu in less than one tur while holding mating flanks from engagement until the last fraction of a torn to prevent a high torque before makeup, after which, mating flanks formed with a predetermined included angle engage and build to the desired torque.
  • the included angle between flanks is dimensioned to exert a pressure between mating flanks when tightened, with the radial force available, that will generate a torque within a predetermined torque range between mating flanks, once the flanks are allowed to engage.
  • the thread taper is fast enough and the stab flank OD's are enough larger than the load flank OD's facing them to provide a large enough area on the stab Hanks near their OD's, to adequately support weight of the pipe jomt(s) being connected without galling or damage by impacts thai may occur during assembly, as can occur with other connections, until approximately the last tenth of a turn.
  • the thread form preferably has cylindrical crests and roots that resist handling damage more effectively than curved crests can, and they also facilitate a deep stab.
  • the small included angle betwee flanks, relative to the 60 degree included include angle of an API ground thread form, pro vides a much higher torque for a given radial thread interference as the box and pin flanks engage, which makes a torque shoulder unnecessary, and in turn, eliminates need for extra locking devices to prevent accidental loosening of the connection while in service.
  • Flank angles are chosen to also preload the box and pin threads high enough with the radial force available, against the forces of pile drivi ng to prevent fatigue of the connection or l eakage and also to prevent loss of energy while bein driven by a pile hammer, to prevent damage to the connection and more efficientl chive the pipe into the earth.
  • Flank angles are best chosen to: (1 ) Effec a torque great enough to prevent back-off; (2) Keep load flanks out of engagement during makeup; (3) Force- Vector a preload stress that will prevent loosening, wear, and fatigue: (4)
  • FIG. 1 A half-section drawing of a connection in accord with the invention.
  • FIG. 2 An enlarged fragmentary section of a preferred thread form.
  • FIG. 3 An enlarged fragmentary section of an optional O-ring seal .
  • Figure I is a quarter section drawing of a. box (1.) and a pin (2) of the invention, both having weld-necks (3,4) respectively.
  • the box and pin are connected b tapered box threads (5) and tapered pin threads (6) that mate securely to connect and seal pipe joints welded to their weld necks.
  • Box OD (7) is sufficiently larger than the box pipe OD (9) such that shoulder ( 1) between them is wide enough to cooperate with conventional elevators to lift a joint or joints of pipe, during drilling of the well when the pipe is run into the wel l "box-up".
  • shoulder (10) may be formed on the pin between the pin pipe OD (8) and pin OD (12) for use if the pipe is ru "pin-up".
  • the threads may be formed to seal against fluid pressure and also, box nose (.13) and pin nose (14) may be formed to seal against pin neck seat (16) and box neck seat (15) respectively, and soft seals such as box neck -ring (17) and pin neck O-ring (18) may be provided to seal against pin nose (14) and box nose (13) respectively should other seals be damaged.
  • Pin vent hole (21) and box vent hole (22) may be drilled to vent the outer sides of the o-ting grooves, so excess dope will flow out past the o-rings during makeup to allow fall makeup, but seal against fluid pressure in the other direction. Any combination of the seals maybe used on any given well, depending cm the severity of leakage on that well as deemed by the operator.
  • the box thread pull-out point at (19) leaves enough length on seat (15) to form a seal with the pin nose and to also position the O-ring groove (23) and the O- ring (17).
  • the pin thread start point (20) is positioned far enough from the box pul!out point to allow for machining tolerances.
  • the threads should be tightened to within a prescribed torque range effected by a predetermined radial interference between box and pin, and if the pipe is to be driven into the earth by a pile-driving hammer, the the preload stress should exceed at least 80% of the stress imposed on the connection by the hammer, a percentage that was determined by i strumented field trials.
  • the nose seals are actuated by a similar radial interference within the elastic limit of the material, while the conventional O-ring seals are actuated by squeezing the O-ring for an environmental seal and also b fluid pressure as is well known.
  • Figure 3 depicts a thread form at stab positio suitable for use with the present invention having an axis (100), box and pin thread crests (31AN 32), box and pin thread roots (33, 34 ⁇ respecti vely, box and pin load flanks (35, 36 ⁇ respectively, and stab flanks (37, 38) respectively, where the pin. crest diameter is smaller than the box crest diameter sufficiently when at stab position both axially and circumferential ly , for the pin to be lowered into the box until the pin stab flank contacts the box stab flank.
  • the area of contact (40) between the stab flanks when at stab position should be sufficient to not only withstand the weight of the joint(s) being stabbed without deformation or galling, but twice that for example, to allow for impact loading also. Conversely, the area must be small enough to pass the mating thread far enough to allow makeup within the desired number of turns which typically, is less tha one turn to save rig time.
  • the thread pitch, lead, taper, flank widths and included angle (39) must be coordinated as taught herein, the included angle being the algebraic sura of the stab flank angle (42) and the load flank angle (41).
  • the included angle must be small enough to generate enough force between mating flanks from the available thread interference, to preload the connection above service forces and if the joint is to be driven, to at least 80% of loads imposed by a pile driving hammer.
  • the stab flank angle must be small enough that the joint of pipe supported by the stab flank while being stabbed, will easily ride up the stab flank without galling, to full engagement position during the makeup turn.
  • the stab flank angle must be great enough to prevent the pin from moving off center of the box, far enough to engage mating flanks before makeup while being rotated, to prevent erratic torque that indicates false makeup positions and to prevent excessive wear and galling.
  • the thread pitch (46 s, the thread lead (47), the stab flank width (48), the load flank width (49) and the thread taper (50) must ail be proportioned and dimensioned properly. While at stab position as depicted in Fig 3, the box crest must clear the pin crest and during one turn or less, the thread forms should preferably coincide and tighten against each other, as controlled by the thread lead and taper.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un filetage femelle et mâle pour connecter des joints de tuyaux rapidement et de manière sécurisée pour transporter des fluides, lesquels tuyaux peuvent être enfoncés par battage dans la terre.
PCT/US2013/046049 2012-06-17 2013-06-16 Connexion de tube conducteur WO2013192058A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261660774P 2012-06-17 2012-06-17
US61/660,774 2012-06-17

Publications (3)

Publication Number Publication Date
WO2013192058A2 true WO2013192058A2 (fr) 2013-12-27
WO2013192058A3 WO2013192058A3 (fr) 2014-07-03
WO2013192058A4 WO2013192058A4 (fr) 2014-08-21

Family

ID=49769669

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/046049 WO2013192058A2 (fr) 2012-06-17 2013-06-16 Connexion de tube conducteur

Country Status (1)

Country Link
WO (1) WO2013192058A2 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601491A (en) * 1983-10-19 1986-07-22 Vetco Offshore, Inc. Pipe connector
US20030122378A1 (en) * 2000-06-09 2003-07-03 Shigeo Nagasaku Pipe joint
US20030132633A1 (en) * 2000-06-07 2003-07-17 Jun Maeda Joint with tapered threads
US20080048443A1 (en) * 2006-06-02 2008-02-28 Sub-Drill Supply Limited Bimetal bore seal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601491A (en) * 1983-10-19 1986-07-22 Vetco Offshore, Inc. Pipe connector
US20030132633A1 (en) * 2000-06-07 2003-07-17 Jun Maeda Joint with tapered threads
US20030122378A1 (en) * 2000-06-09 2003-07-03 Shigeo Nagasaku Pipe joint
US20080048443A1 (en) * 2006-06-02 2008-02-28 Sub-Drill Supply Limited Bimetal bore seal

Also Published As

Publication number Publication date
WO2013192058A4 (fr) 2014-08-21
WO2013192058A3 (fr) 2014-07-03

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