WO2015187090A1 - Procédé de fabrication de protecteur de filetage - Google Patents

Procédé de fabrication de protecteur de filetage Download PDF

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Publication number
WO2015187090A1
WO2015187090A1 PCT/SG2014/000253 SG2014000253W WO2015187090A1 WO 2015187090 A1 WO2015187090 A1 WO 2015187090A1 SG 2014000253 W SG2014000253 W SG 2014000253W WO 2015187090 A1 WO2015187090 A1 WO 2015187090A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread protector
making
spinning
protector
piece
Prior art date
Application number
PCT/SG2014/000253
Other languages
English (en)
Inventor
Quintin Charles NEUBRONNER
Original Assignee
Dura Metal (S) Pte Ltd
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 Dura Metal (S) Pte Ltd filed Critical Dura Metal (S) Pte Ltd
Priority to PCT/SG2014/000253 priority Critical patent/WO2015187090A1/fr
Priority to SG11201606720VA priority patent/SG11201606720VA/en
Publication of WO2015187090A1 publication Critical patent/WO2015187090A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B17/006—Accessories for drilling pipes, e.g. cleaners
    • 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
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/005—Protection of pipes or objects of similar shape against external or internal damage or wear specially adapted for the ends of pipes

Definitions

  • the present invention relates, generally, to a method of fabricating thread protector which is useful for safely transporting oilfield piping, and specifically, for connecting of piping in the field of oil drilling.
  • Pipes are tubular goods use in the drilling industries or in production of oil and gas, experience a considerable amount of handling and a certain degree of mishandling and abuse on their journey from the steel mill to the final well destination.
  • Pipes such as those used for oil or gas drilling, are often connected at the ends using a male thread portion at one end (the pin end) of a section of pipe that is threaded and connected to a female thread portion (the box end) of another section of pipe.
  • the threaded ends of a pipe are subject to damage when not in actual use. Pipes are often dropped or impacted by other outside forces.
  • Thiread protectors are commonly used to protect the threaded ends of a pipe.
  • thread protector In the Oil and Gas industry, a thread protector is used to protect the threads of pipe in the course of transportation and storage.
  • thread protectors are generally manufactured from plastic or steel material and can be applied to the pipe manually or automatically by ways of machineries. Metal thread protectors can be cleaned and re-used while plastic thread protectors are often collected and re-used or recycled.
  • the first method of manufacturing comprises the steps of (i) cutting sheet metal to an appropriate size; (ii) rolling and welding the cut sheet material to form a work-piece having the shape of a thread protector; (iii) machining the work piece; and (iv) a heat treatment.
  • the second method of manufacturing comprises the steps of (i) casting and (ii) cutting the casted metal sheet to form a work-piece having the shape of a thread protector; and (iii) proceeding the work-piece to heat treatment.
  • U.S. Pat. No. 5,706,894 shows a device for suspending various downhole tools below the device for repair and maintenance purposes.
  • Step (d) implementing a combined spinning and machining technique to create the thread profile on the Protector obtained in Step (c) such that no further machining is required after the final spinning.
  • An object of the present invention is to provide a method of fabrication a thread protector, wherein the metal spinning process provides cost advantages over conventional metal forming for the following reasons such as tooling flexibility, improved material yield, reduced material requirements for structurally superior parts.
  • a further object of the present invention is to provide a method of fabricating thread protector, wherein the tooling for metal spinning is simple and economical to produce, and there is no adding or removing material from the work-piece, therefore, there is a significant cost advantage via metal spinning as there is no material wastage.
  • a further object of the present invention is to provide a method of fabricating thread protector, wherein the tensile strength of the metal is improved due to metal deformation and cold-worked on the metal, which allows thinner walled components to be fabricated from lighter gauge materials.
  • Another object of the present invention is to provide a method of fabricating thread protector, wherein the product obtained has good product consistency and good tolerance achievable.
  • Still yet another object of the present invention is to provide a fabricating thread protector, wherein the product obtained are of good mechanical properties without additional heat treatment, and thus reduces additional process cost.
  • FIG. 1 is a flowchart showing the fabrication process of thread protector in accordance with the present invention.
  • FIG. 2 is a perspective view showing a partial of a lathe machine used for the fabrication of the thread protection in accordance with the present invention.
  • FIGs. 3A-3D show schematically the spinning processes in accordance with the present invention.
  • FIG. 4 shows schematically a thread protector obtained in accordance with the fabrication method of the present invention.
  • the thread protector 100 has a thin shell 102, generally ranging from 3 mm to 9 mm.
  • the shell 102 is first formed by light-cutting of a metallic material for instance, steel sheet material into appropriate size, greatly depending on the diameter of the pipes to be mounted onto.
  • the thread protector 100 thus obtained can be cleaned and re-used.
  • a metal sheet such as steel metal sheet is obtained and a light cutting process 100 is employed to cut the steel sheet to obtain a work-piece for forming a thread protector.
  • the size of the cut-sheet is ranging from 100 to 200 cm, the exact size of which is depending on the diameter of the pipes to be protected.
  • a punching step 200 is applied to the light-cut steel sheet such that a cylindrical, bowl or cup shaped is formed.
  • the obtained work-piece is then processed to a spinning process either manually or automatically using lathe machine.
  • a formed block (mandrel) 22 is first mounted in the drive section of a lathe machine.
  • a pre-sized metal disk or work-piece is then clamped against the formed block 22 by a pressure pad or clamp (see diagram) which is attached to the tail stock 24 of the lathe machine.
  • the formed block 22 and the work-piece 28 are rotated simultaneously at a speed ranging from 800 to 1200 RPM.
  • a localised force for instance by using a roller tool 26 is then applied to the work-piece 28 to cause the work-piece 28 to flow over the block 22.
  • the force is usually applied via various levered tools.
  • simple thread protector the work-pieces 28 are just removed from the block 22, but for more complex shapes of thread protectors, a multipiece block is required. This is due to the fact that the final diameter of the work-piece is always less than the starting diameter and therefore the work-piece must be thick, elongated radially or buckle circumferential.
  • FIG. 3 shows the applying of levered tool in sequences onto the work-piece in accordance with the present invention.
  • FIG. 3A the work-piece 28 is clamped between the mandrel (block) 22 and a or pressure pad or a clamp 30 in accordance with the present invention.
  • a localised forced is applied by using a levered tool such as a roller tool.
  • FIG. 3B-3D the forced is applied onto the work-piece and a thread protector is obtained and is shown in FIG. 3D.
  • the work-piece 28 is rotated at high speed and is formed into an axially symmetric park.
  • the process 300 is generally performed using CNC lathe machine or by hand spinning technique if the thread protector is a simple one.
  • step 400 the protector are to be threaded by machining.
  • thread cutting is used when full thread depth is required, when the blank is basic and when threading a tapered thread.
  • the present invention provides a method of making a thread protector comprising the steps of:
  • step (d) implementing a combined spinning and machining technique to create the thread profile on the Protector obtained in step (c) such that no further machining is required after the final spinning.
  • a heat treatment step 500 can be applied such that the thread protector are stress relief (after excessive 'cold forming' by the spinning process) or normalized, quenched and temper (for medium and high Carbon and Alloy Steel) to further increase the metal mechanical strength.
  • the time required for heat treatment is about 20 to 30 minutes for stress relief
  • the metal spinning on a seamless tube raw cater provides an Open end' metal thread protector of all sizes. If the metal spinning is implemented on a metal sheet raw cater a 'closed end' thread protector of all sizes is obtained.
  • the method of making a thread protector is further comprising the step of profiling of the protector by spinning process cater for 'threadless'.

Abstract

L'invention concerne un procédé de fabrication d'un protecteur de filetage, comprenant les étapes consistant à : (a) découper une tôle métallique pour former un protecteur de filetage ; (b) appliquer une étape de poinçonnage à la tôle métallique découpée jusqu'à ce qu'une taille appropriée d'une pièce soit obtenue ; (c) repousser au tour la pièce par le montage de la pièce sur la section d'entraînement d'un tour d'usinage jusqu'à ce qu'un protecteur de filetage de type cloche ou en forme coupelle soit obtenu ; (d) mettre en œuvre un processus d'usinage sur la pièce jusqu'à ce qu'un protecteur de filetage soit obtenu.
PCT/SG2014/000253 2014-06-02 2014-06-02 Procédé de fabrication de protecteur de filetage WO2015187090A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/SG2014/000253 WO2015187090A1 (fr) 2014-06-02 2014-06-02 Procédé de fabrication de protecteur de filetage
SG11201606720VA SG11201606720VA (en) 2014-06-02 2014-06-02 A method of fabricating thread protector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2014/000253 WO2015187090A1 (fr) 2014-06-02 2014-06-02 Procédé de fabrication de protecteur de filetage

Publications (1)

Publication Number Publication Date
WO2015187090A1 true WO2015187090A1 (fr) 2015-12-10

Family

ID=54767051

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2014/000253 WO2015187090A1 (fr) 2014-06-02 2014-06-02 Procédé de fabrication de protecteur de filetage

Country Status (2)

Country Link
SG (1) SG11201606720VA (fr)
WO (1) WO2015187090A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2092535A (en) * 1936-05-28 1937-09-07 Charles H Schnorr Thread protector
US2627877A (en) * 1950-05-06 1953-02-10 Wedge Protectors Inc Thread protector
US4036261A (en) * 1975-07-29 1977-07-19 Service Equipment Design Co., Inc. Thread protector for oil-well pipe and bladder incorporated therein

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2092535A (en) * 1936-05-28 1937-09-07 Charles H Schnorr Thread protector
US2627877A (en) * 1950-05-06 1953-02-10 Wedge Protectors Inc Thread protector
US4036261A (en) * 1975-07-29 1977-07-19 Service Equipment Design Co., Inc. Thread protector for oil-well pipe and bladder incorporated therein

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Metal spinning", 15 August 2013 (2013-08-15), Retrieved from the Internet <URL:http://web.archive.org/web/20130815090751/http://en.wikipedia.org/wiki/Metal_spinning> [retrieved on 20140721] *

Also Published As

Publication number Publication date
SG11201606720VA (en) 2016-09-29

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