Hydril Company

Organization

  • Houston, TX, US
  • OIL & GAS FILED MACHINERY & EQUIPMENT
  • Business Address
    3300 N SAM HOUSTON PKWY E HOUSTON TX 77032 2814492000
  • Mailing Address
    3300 N SAM HOUSTON PKWY EAST HOUSTON TX 77032
  • State Location
    TX
  • State of Incorporation
    DE

Patents Grantslast 30 patents

  • Information Patent Grant

    Threadform having enlarged grooves

    • Patent number 11,953,122
    • Issue date Apr 9, 2024
    • Hydril Company
    • Alejandro Juarez
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Curvilinear sealing system

    • Patent number 11,753,876
    • Issue date Sep 12, 2023
    • Hydril Company
    • Alejandro Juarez
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Threaded tubular connection

    • Patent number 11,560,760
    • Issue date Jan 24, 2023
    • Hydril Company
    • David Mutis Rueda
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Wedge thread connection for tubular goods

    • Patent number 11,512,538
    • Issue date Nov 29, 2022
    • Hydril Company
    • Jonathan Robert Breen
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Curvilinear sealing system

    • Patent number 11,421,487
    • Issue date Aug 23, 2022
    • Hydril Company
    • Alejandro Juarez
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Wedge threadform having crest to root thread compound relief areas

    • Patent number 11,371,293
    • Issue date Jun 28, 2022
    • Hydril Company
    • Alejandro Juarez
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Threadform having crest to root thread compound relief areas

    • Patent number 11,371,292
    • Issue date Jun 28, 2022
    • Hydril Company
    • Alejandro Juarez
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Threaded tubular connection

    • Patent number 11,174,686
    • Issue date Nov 16, 2021
    • Hydril Company
    • David Mutis Rueda
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Threaded and coupled tubular goods connection

    • Patent number 11,047,413
    • Issue date Jun 29, 2021
    • Hydril Company
    • Stephen Harvey
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Abutments for threaded connections

    • Patent number 10,704,338
    • Issue date Jul 7, 2020
    • Hydril Company
    • Doug R. Enderle
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Wedge threads with a solid lubricant coating

    • Patent number 9,052,041
    • Issue date Jun 9, 2015
    • Hydril Company
    • David Llewellyn Mallis
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Step-to-step wedge thread connections and related methods

    • Patent number 8,984,734
    • Issue date Mar 24, 2015
    • Hydril Company
    • David Llewellyn Mallis
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Threaded connection with perturbed flanks

    • Patent number 8,668,233
    • Issue date Mar 11, 2014
    • Hydril Company
    • David Llewellyn Mallis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Step-to-step wedge thread connections and related methods

    • Patent number 8,496,274
    • Issue date Jul 30, 2013
    • Hydril Company
    • David Llewellyn Mallis
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Mid-seal for expandable connections

    • Patent number 8,177,262
    • Issue date May 15, 2012
    • Hydril Company L.P.
    • Robert S. Sivley, IV
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Electrically insulated wedge thread connection

    • Patent number 8,171,613
    • Issue date May 8, 2012
    • Hydril Company
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Single taper wedge thread connection with mid-seal

    • Patent number 8,029,025
    • Issue date Oct 4, 2011
    • Hydril Company
    • Robert S. Sivley, IV
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Wedge thread with torque shoulder

    • Patent number 7,988,205
    • Issue date Aug 2, 2011
    • Hydril Company
    • David Llewellyn Mallis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Threads with perturbations

    • Patent number 7,942,454
    • Issue date May 17, 2011
    • Hydril Company
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Wedge thread connections having a clearance gap volume

    • Patent number 7,850,211
    • Issue date Dec 14, 2010
    • Hydril Company
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Threaded connection with wedge segments

    • Patent number 7,828,337
    • Issue date Nov 9, 2010
    • Hydril Company L.P.
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Threads with perturbations

    • Patent number 7,810,849
    • Issue date Oct 12, 2010
    • Hydril Company L.P.
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Scalloped wedge threads

    • Patent number 7,717,478
    • Issue date May 18, 2010
    • Hydril LLC
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Wedge thread with torque shoulder

    • Patent number 7,690,696
    • Issue date Apr 6, 2010
    • Hydril Company
    • David Llewellyn Mallis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Mismatched flanks for a wedge thread

    • Patent number 7,686,350
    • Issue date Mar 30, 2010
    • Hydril LLC
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Helical groove for a tubular connection

    • Patent number 7,607,333
    • Issue date Oct 27, 2009
    • Hydril LLC
    • Robert S. Sivley, IV
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Dope relief method for wedge thread connections

    • Patent number 7,578,039
    • Issue date Aug 25, 2009
    • Hydril LLC
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Wedge thread with high-angle metal seal

    • Patent number 7,575,255
    • Issue date Aug 18, 2009
    • Hydril LLC
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Floating wedge thread for tubular connection

    • Patent number 7,527,304
    • Issue date May 5, 2009
    • Hydril LLC
    • David Llewellyn Mallis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pseudo two-step connection

    • Patent number 7,500,698
    • Issue date Mar 10, 2009
    • Hydril LLC
    • Harris A. Reynolds, Jr.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    THREADED AND COUPLED TUBULAR GOODS CONNECTION

    • Publication number 20240018985
    • Publication date Jan 18, 2024
    • Hydril Company
    • Stephen Harvey
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    CURVILINEAR SEALING SYSTEM

    • Publication number 20230383609
    • Publication date Nov 30, 2023
    • Hydril Company
    • Alejandro Juarez
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    WEDGE THREAD CONNECTION FOR TUBULAR GOODS

    • Publication number 20230088330
    • Publication date Mar 23, 2023
    • Hydril Company
    • Jonathan Robert Breen
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    THREADED CONNECTION FOR EXPLORATION AND PRODUCTION OF A HYDROCARBON...

    • Publication number 20220290784
    • Publication date Sep 15, 2022
    • Hydril Company
    • Jorge Alberto CORDERO
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    THREADED AND COUPLED TUBULAR GOODS CONNECTION

    • Publication number 20210317856
    • Publication date Oct 14, 2021
    • Hydril Company
    • Stephen Harvey
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    THREADED TUBULAR CONNECTION

    • Publication number 20200024911
    • Publication date Jan 23, 2020
    • Hydril Company
    • David MUTIS RUEDA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    WEDGE THREAD CONNECTION FOR TUBULAR GOODS

    • Publication number 20190330929
    • Publication date Oct 31, 2019
    • Hydril Company
    • Jonathan Robert Breen
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    ABUTMENTS FOR THREADED CONNECTIONS

    • Publication number 20180340378
    • Publication date Nov 29, 2018
    • Hydril Company
    • Doug R. Enderle
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    THREADED TUBULAR CONNECTION

    • Publication number 20180223606
    • Publication date Aug 9, 2018
    • Hydril Company
    • David Mutis Rueda
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    THREADED AND COUPLED TUBULAR GOODS CONNECTION

    • Publication number 20170314596
    • Publication date Nov 2, 2017
    • Hydril Company
    • Stephen Harvey
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    STEP-TO-STEP WEDGE THREAD CONNECTIONS AND RELATED METHODS

    • Publication number 20130219686
    • Publication date Aug 29, 2013
    • Hydril Company
    • David Llewellyn Mallis
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    STEP-TO-STEP WEDGE THREAD CONNECTIONS AND RELATED METHODS

    • Publication number 20120074693
    • Publication date Mar 29, 2012
    • Hydril Company
    • David Llewellyn Mallis
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    STEP-TO-STEP WEDGE THREAD CONNECTIONS AND RELATED METHODS

    • Publication number 20120074690
    • Publication date Mar 29, 2012
    • Hydril Company
    • David Llewellyn Mallis
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    WEDGE THREADS WITH A SOLID LUBRICANT COATING

    • Publication number 20120038147
    • Publication date Feb 16, 2012
    • Hydril Company
    • David Llewellyn Mallis
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    WEDGE THREADS WITH A SOLID LUBRICANT COATING

    • Publication number 20110084477
    • Publication date Apr 14, 2011
    • Hydril Company
    • David Llewellyn Mallis
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    Mounts for Blowout Preventer Bonnets and Methods of Use

    • Publication number 20110005743
    • Publication date Jan 13, 2011
    • Hydril Company LLC
    • Edward Hemphill
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    THREADS WITH PERTURBATIONS

    • Publication number 20100156099
    • Publication date Jun 24, 2010
    • Hydril Company
    • Harris A. Reynolds, JR.
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    RAM BOP POSITION SENSOR

    • Publication number 20080196888
    • Publication date Aug 21, 2008
    • HYDRIL LLC
    • Robert Arnold Judge
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    MOUNTS FOR BLOWOUT PREVENTER BONNETS

    • Publication number 20080142746
    • Publication date Jun 19, 2008
    • Hydril Company LLC
    • Edward Hemphill
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    Electrically insulated wedge thread connection

    • Publication number 20080084060
    • Publication date Apr 10, 2008
    • Hydril Company LLC
    • Harris A. Reynolds
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    ANNULAR BOP PACKING UNIT

    • Publication number 20080066906
    • Publication date Mar 20, 2008
    • Hydril Company LP
    • Philip A. Huff
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    METHOD OF DESIGNING BLOWOUT PREVENTER SEAL USING FINITE ELEMENT ANA...

    • Publication number 20080027693
    • Publication date Jan 31, 2008
    • Hydril Company LP
    • Shafiq Khandoker
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    REVISED CURE CYCLE FOR ANNULAR PACKING UNITS

    • Publication number 20080023865
    • Publication date Jan 31, 2008
    • Hydril Company LP
    • Stefan Butuc
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    SEAL FOR BLOWOUT PREVENTER WITH SELECTIVE DEBONDING

    • Publication number 20080023917
    • Publication date Jan 31, 2008
    • Hydril Company LP
    • Shafiq Khandoker
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    PSEUDO TWO-STEP CONNECTION

    • Publication number 20080012322
    • Publication date Jan 17, 2008
    • Hydril Company LP
    • Harris A. Reynolds
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    RAM BOP SHEAR DEVICE

    • Publication number 20080001107
    • Publication date Jan 3, 2008
    • Hydril Company LP
    • Dustin Dean Gass
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    EXPANSION PIG

    • Publication number 20070163786
    • Publication date Jul 19, 2007
    • Hydril Company LP
    • Robert S. Sivley
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    THREADED CONNECTION WITH PERTURBED FLANKS

    • Publication number 20070158943
    • Publication date Jul 12, 2007
    • Hydril Company LP
    • David Llewellyn Mallis
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    HELICAL GROOVE FOR A TUBULAR CONNECTION

    • Publication number 20070132237
    • Publication date Jun 14, 2007
    • Hydril Company LP
    • Robert S. Sivley
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    PRESSURE-ACTUATED SEALS FOR ROTATING MEMBERS

    • Publication number 20070056775
    • Publication date Mar 15, 2007
    • Hydril Company LP
    • Ryan Gustafson
    • E21 - EARTH DRILLING MINING

Trademarklast 30 trademarks

  • Information Trademark

    88585009 - WEDGE 425

    • Serial number 88585009
    • Registration number 6563369
    • Filing date Aug 20, 2019
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    88585001 - WEDGE 421

    • Serial number 88585001
    • Registration number 7026156
    • Filing date Aug 20, 2019
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    88584996 - WEDGE 463

    • Serial number 88584996
    • Registration number 6342464
    • Filing date Aug 20, 2019
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    88585014 - WEDGE 624

    • Serial number 88585014
    • Registration number 6342465
    • Filing date Aug 20, 2019
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    88585020 - WEDGE 461

    • Serial number 88585020
    • Registration number 6342466
    • Filing date Aug 20, 2019
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    88585024 - WEDGE 441

    • Serial number 88585024
    • Registration number 6342467
    • Filing date Aug 20, 2019
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    87252270 - WEDGE XP

    • Serial number 87252270
    • Registration number 5439166
    • Filing date Nov 30, 2016
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85881390 - WEDGE 623

    • Serial number 85881390
    • Registration number 4893285
    • Filing date Mar 20, 2013
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602794 - WEDGE 627

    • Serial number 85602794
    • Registration number 4960482
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602793 - WEDGE 563

    • Serial number 85602793
    • Registration number 4870974
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602818 - WEDGE 665

    • Serial number 85602818
    • Registration number 5003563
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602771 - WEDGE 625

    • Serial number 85602771
    • Registration number 5003560
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602784 - WEDGE 523

    • Serial number 85602784
    • Registration number 4870973
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602782 - WEDGE 513

    • Serial number 85602782
    • Registration number 4442223
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602768 - WEDGE 553

    • Serial number 85602768
    • Registration number 5003559
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602776 - WEDGE 503

    • Serial number 85602776
    • Registration number 5003561
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602817 - WEDGE 667

    • Serial number 85602817
    • Registration number 4941590
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602763 - WEDGE 533

    • Serial number 85602763
    • Registration number 5003558
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602804 - WEDGE 511

    • Serial number 85602804
    • Registration number 5003562
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    85602802 - WEDGE 521

    • Serial number 85602802
    • Registration number 4442224
    • Filing date Apr 19, 2012
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    77075490 - BOLTLESS

    • Serial number 77075490
    • Registration number 3433456
    • Filing date Jan 3, 2007
    • Hydril Company
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    78685934 - PH-6

    • Serial number 78685934
    • Filing date Aug 4, 2005
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    78651838 - SLX

    • Serial number 78651838
    • Registration number 3095666
    • Filing date Jun 16, 2005
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    78594132 - HYDRIL

    • Serial number 78594132
    • Registration number 3179436
    • Filing date Mar 24, 2005
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    78594138

    • Serial number 78594138
    • Registration number 3167567
    • Filing date Mar 24, 2005
    • Hydril Company
    • 37 - Building construction
  • Information Trademark

    78594140

    • Serial number 78594140
    • Registration number 3179437
    • Filing date Mar 24, 2005
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    78594120 - HYDRIL

    • Serial number 78594120
    • Registration number 3179435
    • Filing date Mar 24, 2005
    • Hydril Company
    • 6 - Common metals and their alloys
  • Information Trademark

    78594127 - HYDRIL

    • Serial number 78594127
    • Registration number 3161723
    • Filing date Mar 24, 2005
    • Hydril Company
    • 37 - Building construction
  • Information Trademark

    78594146 - HYDRIL

    • Serial number 78594146
    • Registration number 3167568
    • Filing date Mar 24, 2005
    • Hydril Company
    • 37 - Building construction
  • Information Trademark

    78328396 - GL

    • Serial number 78328396
    • Registration number 2963962
    • Filing date Nov 14, 2003
    • Hydril Company
    • 7 - Machines and machine tools