WO2002010630A1 - Joint de tige resistant a l'usure et tige de forage fabriquee a partir de ce joint - Google Patents

Joint de tige resistant a l'usure et tige de forage fabriquee a partir de ce joint Download PDF

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Publication number
WO2002010630A1
WO2002010630A1 PCT/US2001/023737 US0123737W WO0210630A1 WO 2002010630 A1 WO2002010630 A1 WO 2002010630A1 US 0123737 W US0123737 W US 0123737W WO 0210630 A1 WO0210630 A1 WO 0210630A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool joint
formation portions
upset portion
tool
drill pipe
Prior art date
Application number
PCT/US2001/023737
Other languages
English (en)
Inventor
John F. Price
Original Assignee
Grant Prideco, L.P.
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 Grant Prideco, L.P. filed Critical Grant Prideco, L.P.
Priority to AU2001277212A priority Critical patent/AU2001277212A1/en
Publication of WO2002010630A1 publication Critical patent/WO2002010630A1/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
    • F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
    • 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
    • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear

Definitions

  • the present invention relates to tool joints such as tool joints forming part of a drill pipe and, more particularly, to tool joints having enhanced wear resistance and to drill pipes made with such tool joints.
  • the prior art abounds with efforts to provide protection for the tool joints of the drill string, including the tool joints of drill pipe and drill collars, by the application of various hardfacing materials or hard metal, such as tungsten carbide, to the tool joints and, in some cases, to intermediate portions of the drill pipe.
  • Efforts have also been made to protect the well casing against wear by utilizing devices, such as elastomeric sleeves, applied to the drill pipe to hold the drill pipe away from the casing.
  • the drill pipe employed in the drilling of oil and gas wells is one of the higher cost items in drilling rig operations due to the wear of the drill pipe, in terms of original and maintenance costs.
  • Another object of the present invention is to provide a tool joint that exhibits prolonged life and that can be easily constructed. Still a further object of the present invention is to provide a drill pipe made with tool joints that exhibit prolonged life.
  • the tool joint of the present invention comprises a body having a bore therethrough and a threaded section at a first end of the body for connection with a complementary threaded member and a neck portion at a second end of the body.
  • the body includes an upset portion having a generally outer cylindrical surface.
  • the formation' portions are of a number and have a radial dimension such that an imaginary cylinder formed by circumscribing the formation portions is concentric with, and has a diameter greater than, the diameter defined by the outer cylindrical surface of the upset portion.
  • the present invention comprises a drill pipe made from tool joints as described above.
  • Fig. 1 is an elevational view, in section, of a tool joint of the present invention showing a pin connection.
  • Fig. 2 is a view similar to Fig. 1 but showing a box connection.
  • Fig. 3 is a view taken along the lines 3-3 of Fig. 1.
  • Fig. 4 is a view taken along the lines 4-4 of Fig. 2 with the hardfacing deleted. Description of the Preferred Embodiments
  • Drill pipe used in rotary drilling will have a female threaded connection on one end called a "box” and a male threaded connection at the other end called a "pin.”
  • the pin and box are relatively short tubular sections that are machined separately and attached to the end of a pipe section as by welding to form a complete drill pipe.
  • the separately machined threaded connections are commonly referred to as tool joints and are larger in diameter than the body of the pipe section.
  • Fig. 1 shows a tool joint 10 forming a pin connection, tool joint 10 having a body 12 with a generally cylindrical bore 14 extending therethrough.
  • Body 12 has an upset portion 16, a first end 18 having an externally threaded section 20, and a second end 21 forming a neck portion 22.
  • tool joint 10 is connected, as by welding, to a pipe section shown in phantom as P.
  • Monolithic with body 12 and on upset portion 16 are four radially outwardly projecting formation portions 24, formation portions 24, as seen in Fig.3, being generally equally, circumferentially spaced from one another and disposed generally at the intersection of neck portion 22 and upset portion 16.
  • the formation portions 24 will be positioned on upset portion 16 so as to provide wear protection general ly along the entire length of upset portion 16 and thus are usually positioned where neck portion 22 and upset portion 16 intersect.
  • formation portions 24 can be circumscribed to form an imaginary cylinder shown as 26 that is generally concentric with the cylindrical outer surface 17 on upset portion 16 but that has a diameter greater than the diameter of cylindrical upset portion 16.
  • a tool joint 30 forming a pin connection, tool joint 30 having a body 32 with a bore 34 therethrough.
  • Body 32 has an upset portion 36.
  • Formed on one end 31 of body 32 is a cylindrical neck portion 38, while on the other end 40 of body 32, there is an internally threaded section 42.
  • upset portion 16 has an outer cylindrical surface 44.
  • tool joint 30 is connected, as by welding, to a pipe section, shown in phantom as P.
  • Formed monolithically on upset portion 36 of body 32 is an annular rib 46, the outer surface of rib 46 being provided with a band of hardfacing 48.
  • annular rib 46 has formation portions—in this case, an infinite number-that can be circumscribed to form a cylindrical surface that is concentric with the cylindrical outer surface 44 of upset portion 36 but that has a greater diameter than the diameter of the cylinder defined by cylindrical surface 44.
  • formation portion(s) can mean discrete, radially outwardly protecting formations formed on the upset portion of the body of the tool joint (see Fig. 3) or can be any selected portions of an annular rib formed on the upset portion (see Fig. 4).
  • annular rib such as shown in Figs. 2 and 4
  • a complete drill pipe comprised of a tool joint 10 forming a pin and a tool joint 30 forming a box could be constructed in the manner shown—i.e., such that the formation portions on one of the tool joint members would be different from the formation portions on the other of the tool joint members--in the usual case, tool joints forming the pin and box members will have formation portions that are the same— i.e., annular ribs, as shown in Fig. 2, or discrete formation portions, as shown in Fig. 1. It is also to be understood that while the invention has been described with reference to a tool joint such as used in forming a drill pipe, the invention is equally applicable to drill collars and similar downhole members.
  • hardfacing 48 is shown as a continuous band around tool joint 30, it is to be understood that the hardfacing could be deposited in discrete sections distributed on the annular rib. It is also to be understood that, while not shown, hardfacing can be deposited on the discrete formation portions such as shown in Figs. 1 and 3. As a practical matter, by using the present invention, the need to apply hardfacing materials can be dispensed with if desired. In this regard it is to be noted that in conventional tool joints, hardfacing material is normally applied in the same area of the upset portion of the tool joint where the wear-preventing formation portions of the present invention are disposed. Another advantage of the present invention when hardfacing is employed is that it permits application of such material in virtually an unlimited amount above the surface of the upset portion of the tool joint.
  • hardfacing if hardfacing is applied to the formation portions, it can be reapplied to the base material when it is sufficiently worn away.
  • the terms “hardfacing” and “hardsurfacing” are intended not only to mean separate materials, such as tungsten carbide, but are also intended to include surface hardening treatments such as cold rolling, carbonizing, nitriding, boronizing, etc., all of which are used to treat carbon steel to obtain a harder, more wear-resistant surface.
  • the wear protection formation portions are monolithic parts of the tool joints. Indeed, it is a feature of the present invention that the entire tool joint, including the formation portions, is monolithic in nature. This eliminates the need for machining grooves in the tool joint to insert protective rings that are not monolithic with the tool joint, clamp-on rings, which can be lost and dislodged in the borehole, and other types of separate sleeves that are affixed to the tool joint.

Landscapes

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

Abstract

L'invention concerne un joint de tige possédant un corps monolithique (12) doté d'un puits (14) traversant ledit corps et d'une section filetée (20) située sur une première extrémité du corps (18) permettant de se connecter avec un élément fileté complémentaire et d'une section de cou (22) de la seconde extrémité (21) du corps, le corps possédant une partie montante (16) pourvue d'une surface généralement cylindrique externe (17), des parties de formation se projetant radialement vers l'extérieur (24) monolithique avec et sur la partie montante du corps, les formations montantes étant en nombre et de dimension radiale, de manière à ce qu'un cylindre imaginaire formé par la circonscription des parties de formation soit concentrique avec, et possède un diamètre supérieur, au diamètre défini par la surface cylindrique externe.
PCT/US2001/023737 2000-08-01 2001-07-27 Joint de tige resistant a l'usure et tige de forage fabriquee a partir de ce joint WO2002010630A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001277212A AU2001277212A1 (en) 2000-08-01 2001-07-27 Wear-resistant tool joint and drill pipe made therefrom

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63070400A 2000-08-01 2000-08-01
US09/630,704 2000-08-01

Publications (1)

Publication Number Publication Date
WO2002010630A1 true WO2002010630A1 (fr) 2002-02-07

Family

ID=24528259

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/023737 WO2002010630A1 (fr) 2000-08-01 2001-07-27 Joint de tige resistant a l'usure et tige de forage fabriquee a partir de ce joint

Country Status (2)

Country Link
AU (1) AU2001277212A1 (fr)
WO (1) WO2002010630A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7219727B2 (en) 2001-07-18 2007-05-22 Tesco Corporation Wear resistant tubular connection
JP2007515385A (ja) * 2003-07-28 2007-06-14 ブライトスマイル ディベロップメント インコーポレイティッド 歯の白色化を維持または向上するための組成物、方法、デバイスおよびキット
US7361411B2 (en) 2003-04-21 2008-04-22 Att Technology, Ltd. Hardfacing alloy, methods, and products

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385669A (en) * 1981-08-21 1983-05-31 Paul Knutsen Integral blade cylindrical gauge stabilizer reamer
US4583603A (en) * 1984-08-08 1986-04-22 Compagnie Francaise Des Petroles Drill pipe joint
US4760889A (en) * 1986-09-19 1988-08-02 Dudman Roy L High bending strength ratio drill string components
US6167917B1 (en) * 1996-08-27 2001-01-02 Schoeller Bleckmann Oilfield Equipment Limited Drill pipe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385669A (en) * 1981-08-21 1983-05-31 Paul Knutsen Integral blade cylindrical gauge stabilizer reamer
US4583603A (en) * 1984-08-08 1986-04-22 Compagnie Francaise Des Petroles Drill pipe joint
US4760889A (en) * 1986-09-19 1988-08-02 Dudman Roy L High bending strength ratio drill string components
US6167917B1 (en) * 1996-08-27 2001-01-02 Schoeller Bleckmann Oilfield Equipment Limited Drill pipe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7219727B2 (en) 2001-07-18 2007-05-22 Tesco Corporation Wear resistant tubular connection
US7472763B2 (en) 2001-07-18 2009-01-06 Tesco Corporation Wear resistant tubular connection
US7361411B2 (en) 2003-04-21 2008-04-22 Att Technology, Ltd. Hardfacing alloy, methods, and products
JP2007515385A (ja) * 2003-07-28 2007-06-14 ブライトスマイル ディベロップメント インコーポレイティッド 歯の白色化を維持または向上するための組成物、方法、デバイスおよびキット

Also Published As

Publication number Publication date
AU2001277212A1 (en) 2002-02-13

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