EP0931202A1 - Tubes de forage soudes dans lesquels le bourrelet interne est elimine et procede de fabrication associe - Google Patents

Tubes de forage soudes dans lesquels le bourrelet interne est elimine et procede de fabrication associe

Info

Publication number
EP0931202A1
EP0931202A1 EP97931974A EP97931974A EP0931202A1 EP 0931202 A1 EP0931202 A1 EP 0931202A1 EP 97931974 A EP97931974 A EP 97931974A EP 97931974 A EP97931974 A EP 97931974A EP 0931202 A1 EP0931202 A1 EP 0931202A1
Authority
EP
European Patent Office
Prior art keywords
welded
cavity
flash
manufacturing
fact
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.)
Withdrawn
Application number
EP97931974A
Other languages
German (de)
English (en)
Inventor
Renzo Chirulli
Elio Colli
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.)
Colli Drill Srl
Original Assignee
Colli Drill Srl
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 Colli Drill Srl filed Critical Colli Drill Srl
Publication of EP0931202A1 publication Critical patent/EP0931202A1/fr
Withdrawn legal-status Critical Current

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
    • F16L13/00—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
    • F16L13/02—Welded joints
    • 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

Definitions

  • the present invention relates to a welded drill pipe in which the internal flash is removed, and to the relative procedure for its manufacturing.
  • the external flash is easily removed with a cutting tool, whereas the elimination of the internal one is much more difficult.
  • the inner flash disturbs the flow of the fluid inside the pipe and, due to its characteristic middle notch, can cause the crack initiations due to fatigue-stress in the welded joint.
  • the invention and its relative manufacturing procedure solve the technical problem above mentioned as for it is characterized by the complete elimination of the flash, which fills a cavity produced in one of the two parts to be welded, for example, in the tool joint.
  • all the fluid-dynamic troubles inside the pipe, caused by the inner flash are avoided as well as the crack initiations due to fatigue-stress in the welded joint.
  • fig. 1 shows the modular portion of a friction welded drill pipe, manufactured according to the prior art
  • • fig. 2 represents some shapes of the "flash", coming out from the friction welding process; • fig. 3 shows a first example of a friction welded joint with a cavity to be filled by the inner flash, according to the invention, placed between the pipe and male tool joint;
  • fig. 4 shows a second example of a friction welded joint with a cavity to be filled by the inner flash, according to the invention, placed between the pipe and female tool joint.
  • number 1 shows a modular portion of a drill pipe for civil engineering comprising a pipe 2, a male tool joint 3 and a female tool joint 4.
  • Said portion 1 has been manufactured by means of friction welding between pipe and tool joints, both male and female.
  • the friction welding is made by means of strong impact between the two parts to be welded; moreover, to improve the junction between them, the parts are heated to a forging temperature obtained by the rotation of one part with respect to the other.
  • T e process produces a very compact and highly resistant joint and is characterized by a good repetitiveness of its phases and.
  • a disadvantage of the process lies in the formation of the flash 5 ; it is a burr which comes out just during the heating phase (produced by the friction between the two parts to be welded) and takes a shape like those schematically shown in fig. 2. In particular, it is characterized by the presence of a double burr 6 which causes vortices into the fluid flow and by a middle notch 7, possible crack initiation due to fatigue-stress in the welded joint.
  • the removal of the inner flash can be obtained, according to the invention, manufacturing one of the two parts to be friction welded (for example, the tool joint) as the one shown in fig. 3.
  • the male tool joint 8 comprises an externally threaded portion 9, an internal shape 10, suitable to allow the proper motion of the fluid, a stop surface 11 , against which the section 20 to be welded is to be placed, a coupling surface 12 for said section and it is characterized by a cavity 13, whose volume and shape are such as to be completely filled with the inner flash produced by the welding process. Consequently the complete and perfect filling of the cavity avoids the formation of the middle notch.
  • the same manufacturing, according to the invention, is depicted in fig. 4.
  • the female tool joint 14 comprises an internally threaded portion 15, an internal shape 16, suitable to allow the proper motion of the fluid, a stop surface 17, against which the section 20 to be welded is to be placed, a coupling surface 18 for said section and it is characterized by a cavity 19 with the same characteristics of the cavity 13 realized in the male tool joint.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Braking Arrangements (AREA)

Abstract

Tubes de forages soudés destinés à être utilisés dans le génie civil et procédé associé permettant l'élimination du bourrelet interne. Lesdits tubes, fabriqués par soudage par friction des tronçons de tube et des raccords de tube, se caractérisent par l'élimination du bourrelet interne (qui ressort du raccord soudé) qui remplit une cavité prévue à cet effet. Les avantages de ce nouveau produit et dudit procédé de fabrication sont l'élimination des perturbations de la dynamique des fluides à l'intérieur du tube, provoquées par le bourrelet interne, et l'élimination des amorces de fissures dues aux sollicitations de fatigue du raccord soudé.
EP97931974A 1996-09-26 1997-07-28 Tubes de forage soudes dans lesquels le bourrelet interne est elimine et procede de fabrication associe Withdrawn EP0931202A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITBA960041 1996-09-26
IT96BA000041A IT1287029B1 (it) 1996-09-26 1996-09-26 Aste di perforazione frizionate con incameramento del flash interno e relativo procedimento di fabbricazione
PCT/IB1997/000949 WO1998013574A1 (fr) 1996-09-26 1997-07-28 Tubes de forage soudes dans lesquels le bourrelet interne est elimine et procede de fabrication associe

Publications (1)

Publication Number Publication Date
EP0931202A1 true EP0931202A1 (fr) 1999-07-28

Family

ID=11335739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97931974A Withdrawn EP0931202A1 (fr) 1996-09-26 1997-07-28 Tubes de forage soudes dans lesquels le bourrelet interne est elimine et procede de fabrication associe

Country Status (4)

Country Link
EP (1) EP0931202A1 (fr)
AU (1) AU3555197A (fr)
IT (1) IT1287029B1 (fr)
WO (1) WO1998013574A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106312440A (zh) * 2015-06-24 2017-01-11 钱立群 一种中空钢钻杆摩擦焊修复方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19917071C2 (de) * 1999-04-15 2001-04-26 Slv Muenchen Gmbh Reibschweißverfahren
DE10031416A1 (de) * 2000-06-28 2002-01-10 Hilti Ag Reibschweissrohrverbindung und reibgeschweisstes Gesteinsbohrwerkzeug mit Bohrflüssigkeitskanal
EP2021672B1 (fr) * 2006-05-24 2019-08-14 Mathias Broder Raccord pour tiges de forage et tige de forage équipée d'un tel raccord
ITUD20110163A1 (it) * 2011-10-14 2013-04-15 Scaglia Spa Asta di trivellazione
CN105143593B (zh) 2013-04-22 2018-04-06 福伊特专利有限公司 具有连接器的金属管
DE102013208458A1 (de) 2013-05-08 2014-11-13 Voith Patent Gmbh Metallrohr mit Verbinder
CN109899004A (zh) * 2019-03-12 2019-06-18 淮北林光钻探机电工程有限公司 一种勘探用套管及其制造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0138603A3 (fr) * 1983-10-13 1986-04-23 Texas Forge & Tool Limited Conduites et tiges
US4817852A (en) * 1987-10-08 1989-04-04 T. H. Industries Method of replacing drill bit heads
US5154340A (en) * 1991-07-02 1992-10-13 Peacock Harold B Method and device for frictional welding
DE4344561C2 (de) * 1993-12-24 1995-11-30 Daimler Benz Ag Verfahren und Vorrichtung zum Reibschweißen von zylindrischen Fügeteilen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9813574A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106312440A (zh) * 2015-06-24 2017-01-11 钱立群 一种中空钢钻杆摩擦焊修复方法

Also Published As

Publication number Publication date
IT1287029B1 (it) 1998-07-30
AU3555197A (en) 1998-04-17
ITBA960041A0 (it) 1996-09-26
ITBA960041A1 (it) 1998-03-26
WO1998013574A1 (fr) 1998-04-02

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