US2772899A - Threaded oil well drill stem connection with the threads having included crest angleof 90 degrees - Google Patents

Threaded oil well drill stem connection with the threads having included crest angleof 90 degrees Download PDF

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Publication number
US2772899A
US2772899A US27247A US2724748A US2772899A US 2772899 A US2772899 A US 2772899A US 27247 A US27247 A US 27247A US 2724748 A US2724748 A US 2724748A US 2772899 A US2772899 A US 2772899A
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US
United States
Prior art keywords
threads
joint
crest
pin
drill stem
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.)
Expired - Lifetime
Application number
US27247A
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English (en)
Inventor
Evans Seth
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.)
Hughes Tool Co
Original Assignee
Hughes Tool Co
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 Hughes Tool Co filed Critical Hughes Tool Co
Priority to US27247A priority Critical patent/US2772899A/en
Priority to CH281659D priority patent/CH281659A/fr
Priority to GB11060/49A priority patent/GB658029A/en
Priority to DEH1192D priority patent/DE820657C/de
Application granted granted Critical
Publication of US2772899A publication Critical patent/US2772899A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms
    • 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
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • 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
    • E21B17/16—Drill collars
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
    • F16B7/182—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements for coaxial connections of two rods or tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/916—Molecular change

Definitions

  • This invention relates to an improved threaded connection of the shouldered, pin and box type and is of particular utility where such a structure is subjected to severe bending and impact stresses such as are encountered in tool joints and drill collars in the drill string used when drilling wells by the rotary method.
  • Still another object is to provide a pin and box connection having an enhanced tendency to make up or tighten in normal-service i a
  • a further object is to provide a connection having improved self centering characteristics thereby facilitating makeup andbreak out operations.
  • Fig, 2 is a fragmentary view, partly in section, show ⁇ ing the complementary box member
  • Fig. 3 is an elevational view, partly in section, showing the assembled joint comprising the pin and box ele-' ments of Figs. 1 and 2;
  • Fig. 4 is an enlarged detail showing the thread structure of theconnection.
  • the invention is particular. utility in making connections in a drill string where great difficulty is experienced in providing a connection that can be readily made up or broken out inthe field and which will at the same time utilize the material of the joint to a maximum efficiency throughout a long life and without either fatigue failure at or near the last engaged thread or loosening followed by wabbling, galling and ultimate failure.
  • the present invention is based in part upon the discovery that highly improved characteristics are imparted to a joint where the complementary V-type threads thereof. have their flanks converge to the crest 'at an angle of approximately 90. threads and further improving the characteristics of the joint the invention also comprehends rolling or cold working of the thread roots and, as well, surface hardening of the shoulder of at least the pin member.
  • the female member 10 shown in Fig. 2 has a cavity or .box 11 therein and such box has threads-12 which are complemental to the threads 3 on the pin member.
  • an annular surface 14 which in the completed joint, lies proximate the surfaces on the pin member as best seen in Fig. 3 andto which further attention will be directed.
  • the end of the box comprises shoulder 15 adapted to engage the shoulder 6 on the pin memberl.
  • each of the members 1 and 10 has a central bore 16 to accommodate the flow of fluid therethrough'.
  • the invention is illustrated for use in a par t-icular environment it is to be understood that it is not Cooperatively improving such" 3 confined to such use but may be used in any environment where resistance to the types of stresses indicated must be resisted.
  • FIG. 4 there is shown an enlarged fragment of the V-type. threads which comprise .an important feature of the invention.
  • the body of the threaded member is shown at 20 and the thread 21 thereon has tapered flanks 22 and 23 'which terminate outwardly in the flat crest shown at 24. It has been found that greatly improved results accrue where the included angle between the flanks 22 .and 23 lies between 85 and 95.
  • one, or both, of the shoulders is surface hardened, prefer-ably flame hardened, :as indicated at 27 on shoulder 6. This of course facilitates relative movement of these surfaces during make up and, as well, resists 'ga'lling so that adequate make up can be effected. Relaxation within the joint during use is thus insufficient to permit loosening of the joint while in use. In other words all parts of the joint utilize the material to a maximum efiiciency and the shoulder compression is maintained above a critical minimum tightness so that loosening, and resulting deleterious effects cannot occur. 7
  • the member 1- is next spun to cause theimating threads.
  • a threaded connection of the pin and boxtype a pin member having a radial shoulder and a conical end portion extending outwardly therefrom, threads on said tapered end portion for engagement with complementary V-type threads in a mating box member, said threads having a crest angle of approximately 90.
  • a box member having a tapered counterbore, a substantially radial shoulder at the outer end of the counterbore for engagement with a complementary shoulder on a pin member, and V-type threads on the tapered surface of the counterbore, said threads having a crest angle of approximately 90.
  • An improved oil well drill stem threaded connection of the shouldered pin and box type comprising, interfitting, tapered pin and box members having complemental transverse radial shoulders in compression when the joint is made up, interfitting V-type threads on said members, the flanks of the threads on the members being complemental and adjacent flanks on each member converging at an angle of approximately whereby tightness in excess of a predetermined; minimum is maintained after relaxation of the made up connection.
US27247A 1948-05-15 1948-05-15 Threaded oil well drill stem connection with the threads having included crest angleof 90 degrees Expired - Lifetime US2772899A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US27247A US2772899A (en) 1948-05-15 1948-05-15 Threaded oil well drill stem connection with the threads having included crest angleof 90 degrees
CH281659D CH281659A (fr) 1948-05-15 1949-04-19 Dispositif de jonction du type comprenant un élément mâle et un élément femelle.
GB11060/49A GB658029A (en) 1948-05-15 1949-04-26 Improvements in or relating to screw-threaded pipe or rod joints, particularly for oil well drill stems
DEH1192D DE820657C (de) 1948-05-15 1950-01-10 Gewindeverbindung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27247A US2772899A (en) 1948-05-15 1948-05-15 Threaded oil well drill stem connection with the threads having included crest angleof 90 degrees

Publications (1)

Publication Number Publication Date
US2772899A true US2772899A (en) 1956-12-04

Family

ID=21836568

Family Applications (1)

Application Number Title Priority Date Filing Date
US27247A Expired - Lifetime US2772899A (en) 1948-05-15 1948-05-15 Threaded oil well drill stem connection with the threads having included crest angleof 90 degrees

Country Status (4)

Country Link
US (1) US2772899A (de)
CH (1) CH281659A (de)
DE (1) DE820657C (de)
GB (1) GB658029A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3142239A (en) * 1958-10-22 1964-07-28 Voigtlaender Ag Mount for photographic objectives
US3175850A (en) * 1961-06-08 1965-03-30 Myron E Steczynski Wide angle thread and method of forming same
US3489437A (en) * 1965-11-05 1970-01-13 Vallourec Joint connection for pipes
US4028796A (en) * 1975-07-31 1977-06-14 Arthur Everett Bergstrom Method of making a blast joint
US4317585A (en) * 1980-05-30 1982-03-02 Reynolds Metals Company Torqued drill pipe identification
US5018555A (en) * 1987-07-25 1991-05-28 Manfred Hawerkamp Pre-press tube
US5785360A (en) * 1994-11-23 1998-07-28 Uniroc Ab Thread coupling for drill string elements for percussive drilling
NL2004904C2 (nl) * 2010-06-16 2011-12-19 Bosch Sprang Beheer B V Koppelsysteem, samenstelbaar matrijsonderdeel en thermovorminrichting.
US20120195712A1 (en) * 2011-01-28 2012-08-02 General Electric Company Fastener
US20170097025A1 (en) * 2014-04-03 2017-04-06 Hilti Aktiengesellschaft Fastening method

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766054A (en) * 1952-09-29 1956-10-09 Nat Clay Pipe Res Corp Threaded joint-sealing gasket rings for molded pipe
US4530523A (en) * 1982-01-15 1985-07-23 Proni Industries, Inc. Unitary cantilever clamp action fitting with a split end
US4506432A (en) * 1983-10-03 1985-03-26 Hughes Tool Company Method of connecting joints of drill pipe
US4865364A (en) * 1988-07-05 1989-09-12 Vetco Gray Inc. Conical thread form
GB9014858D0 (en) * 1990-07-04 1990-08-22 Garrison Ltd Improvements relating to snooker cues
DE19541163A1 (de) * 1995-11-04 1997-05-07 Hawera Probst Kg Hartmetall Bohrwerkzeug, insbesondere zur Bearbeitung von Gestein
DE202015104842U1 (de) 2015-09-11 2015-09-18 Sysbohr Gmbh - Bohrtechnik Für Den Spezialtiefbau Gewindeverbindung und Bohrgestänge mit Gewindeverbindung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1141151A (en) * 1914-06-06 1915-06-01 Nat Tube Co Pipe-coupling.
US1562373A (en) * 1925-07-13 1925-11-17 Sheldon Waldo Drill-pipe coupling
US2062696A (en) * 1934-05-21 1936-12-01 Packard Motor Car Co Worm gear burnishing machine and method
US2062699A (en) * 1934-05-04 1936-12-01 Packard Motor Car Co Burnishing apparatus
US2091906A (en) * 1935-07-05 1937-08-31 Hughes Tool Co Tool joint
US2160263A (en) * 1937-03-18 1939-05-30 Hughes Tool Co Pipe joint and method of making same
US2215930A (en) * 1939-05-17 1940-09-24 Nat Tube Co Pipe or tube
US2320107A (en) * 1941-07-14 1943-05-25 Abegg & Reinhold Co Aligning connection for drill collars

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1141151A (en) * 1914-06-06 1915-06-01 Nat Tube Co Pipe-coupling.
US1562373A (en) * 1925-07-13 1925-11-17 Sheldon Waldo Drill-pipe coupling
US2062699A (en) * 1934-05-04 1936-12-01 Packard Motor Car Co Burnishing apparatus
US2062696A (en) * 1934-05-21 1936-12-01 Packard Motor Car Co Worm gear burnishing machine and method
US2091906A (en) * 1935-07-05 1937-08-31 Hughes Tool Co Tool joint
US2160263A (en) * 1937-03-18 1939-05-30 Hughes Tool Co Pipe joint and method of making same
US2215930A (en) * 1939-05-17 1940-09-24 Nat Tube Co Pipe or tube
US2320107A (en) * 1941-07-14 1943-05-25 Abegg & Reinhold Co Aligning connection for drill collars

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3142239A (en) * 1958-10-22 1964-07-28 Voigtlaender Ag Mount for photographic objectives
US3175850A (en) * 1961-06-08 1965-03-30 Myron E Steczynski Wide angle thread and method of forming same
US3489437A (en) * 1965-11-05 1970-01-13 Vallourec Joint connection for pipes
US4028796A (en) * 1975-07-31 1977-06-14 Arthur Everett Bergstrom Method of making a blast joint
US4317585A (en) * 1980-05-30 1982-03-02 Reynolds Metals Company Torqued drill pipe identification
US5018555A (en) * 1987-07-25 1991-05-28 Manfred Hawerkamp Pre-press tube
US5785360A (en) * 1994-11-23 1998-07-28 Uniroc Ab Thread coupling for drill string elements for percussive drilling
NL2004904C2 (nl) * 2010-06-16 2011-12-19 Bosch Sprang Beheer B V Koppelsysteem, samenstelbaar matrijsonderdeel en thermovorminrichting.
WO2011159155A2 (en) 2010-06-16 2011-12-22 Bosch Sprang Beheer B.V. Pre-stretcher assembly and thermoforming device
WO2011159155A3 (en) * 2010-06-16 2012-04-05 Bosch Sprang Beheer B.V. Pre-stretcher assembly and thermoforming device
US20120195712A1 (en) * 2011-01-28 2012-08-02 General Electric Company Fastener
US8348577B2 (en) * 2011-01-28 2013-01-08 General Electric Company Fastener
US20170097025A1 (en) * 2014-04-03 2017-04-06 Hilti Aktiengesellschaft Fastening method
US10746211B2 (en) * 2014-04-03 2020-08-18 Hilti Aktiengesellschaft Fastening method

Also Published As

Publication number Publication date
CH281659A (fr) 1952-03-31
DE820657C (de) 1951-11-12
GB658029A (en) 1951-10-03

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