HYDRIL COMPANY

CHECKGUARD

Valves for Controlling Flow of Fluids in Well Drilling;

CHECKGUARD

VALVES FOR CONTROLLING FLOW FLUIDS IN WELL DRILLING;CHECK GUARD;

DRILLGUARD

Valves for Controlling the Flow of Fluids in Well Drilling Operations and which Operate Primarily as Automatic Valves;

FLATPAK

REMOTE CONTROL LINKAGE FOR SUBSEA EQUIPMENT;

FLATPAK

Encapsulated Remote Control Linkage Conduits for Subsea Equipment;

FLEX-LOK

non-metal protectors for drill pipe used for drilling oil, gas or water wells;flex lock;

FLEXPAK

Remote Control Umbilical Linkage in the Nature of Electrical, Hydraulic or Electro-Hydraulic Conduits Enclosed in a Protective Covering for Use with Subsea Equipment;

FLOATGUARD

Valves for Controlling the Flow of Fluids in Well Drilling Operations and which Operate Primarily as Automatic Valves;

GK

WELLBORE EQUIPMENT, NAMELY, ANNULAR BLOWOUT PREVENTERS AND PARTS THEREFOR;

GL

ANNULAR BLOWOUT PREVENTERS AND PARTS THEREFOR;

GX

WELLBORE EQUIPMENT, NAMELY ANNULAR BLOWOUT PREVENTERS AND PARTS THEREFOR;

HYDRIL

HYDRILL;WELL-DRILLING MACHINERY AND TOOLS-NAMELY, [ HYDRAULIC-FEED ROTARY TABLES, BEING WELL-DRILLING TOOLS EACH OF WHICH COMPRISES A ROTATABLE TABLE WITH APERTURE IN CENTER FOR CONTAINING THE END OF A SECTION OF PIPE AND MEANS FOR GRIPPING THE PIPE FOR ROTATING THE TABLE AND FOR ELEVATING OR DEPRESSING SAME BY A HYDRAULIC ELEVATOR; DRAW WORKS, ] TOOL JOINTS, [ UNDERREAMERS; CORE WORKING BARRELS; ] SAFETY JOINTS, [ BEING WELL-DRILLING TOOLS ] EACH OF WHICH COMPRISES A SECTION INSERTABLE IN A STRING OF PIPE SECTIONS CAPABLE OF BEING DISCONNECTED AT WILL TO PERMIT RAISING OF THAT PORTION OF THE PIPE WHICH IS ABOVE IT; [ CORE BITS, ] FISHING TOOLS; GAS-PRESSURE-CONTROL VALVES, BEING WELL-DRILLING TOOLS EACH OF WHICH COMPRISES A SECTION PROVIDED WITH A VALVE, USUALLY OF THE BALL AND SOCKET TYPE, FOR THE PURPOSE OF CONTROLLING THE PASSAGE OF GAS [ ; MUD PUMPS, STEAM ENGINES, HYDRAULIC TURBINES, STEAM TURBINES, OIL PUMPS AND PARTS THEREOF, WATER PUMPS AND PARTS THEREOF, STEAM CONDENSERS, INTERNAL-COMBUSTION ENGINES AND PARTS THEREOF ];

HYDRIL

PULSATION DAMPENERS, [ VALVES OF ALL KINDS AND PIPE FITTINGS, ] BLOWOUT PREVENTERS [, ACCUMULATORS, CASING JOINTS, TUBING JOINTS, DRILL STEM JOINTS, PIPE CONNECTORS, GAS SEPARATORS, FLUSH JOINT DRILL PIPES AND VALVES COMPRISING OIL FIELD EQUIPMENT ];

HYDRIL

Repair and Maintenance of Oil and Gas Wells and Including Threading of Tubing, Pipe, Casing and Accessories;HYDRILL;Design and Testing of Oil and Gas Well Tubing, Pipe Casing and Accessories;The lining and markings on the drawing are part of the design and do not indicate color.;

HYDRIL

Repair and Maintenance of Oil and Gas Wells and Including Threading of Tubing, Pipe, Casing and Accessories;HYDRILL;Design and Testing of Oil and Gas Well Tubing, Pipe, Casing and Accessories;

KELLYGUARD

Fluid Flow Controlling Valves;

MLD

OFFSHORE DRILLING SERVICES;

MUDGUARD

Valves for Controlling the Flow of Fluids in Well Drilling Operations and which Operate Primarily as Automatic Valves;

MUDLIFT

OFFSHORE DRILLING SERVICES;MUD LIFT;

SMART

REMOTE DATA GATHERING AND CONTROL SYSTEMS, AND TELEMETRY SYSTEMS, FOR USE IN MONITORING AND CONTROLLING FLUID FLOW RATES AND QUANTITIES;

SMD

OFFSHORE DRILLING EQUIPMENT;

SUBSEA MUDLIFT DRILLING

OFFSHORE DRILLING SERVICES;SUB SEA MUD LIFT DRILLING;

TRIPLESEAL

PIPE JOINTS;

WEDGE 421

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE FOUR TWO ONE; WEDGE FOUR HUNDRED TWENTY ONE;WEDGE;

WEDGE 425

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE FOUR TWO FIVE; WEDGE FOUR HUNDRED TWENTY FIVE;WEDGE;

WEDGE 441

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE FOUR FOUR ONE; WEDGE FOUR HUNDRED FORTY ONE;WEDGE;

WEDGE 461

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE FOUR SIX ONE; WEDGE FOUR HUNDRED SIXTY ONE;WEDGE;

WEDGE 463

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE FOUR SIX THREE; WEDGE FOUR HUNDRED SIXTY THREE;WEDGE;

WEDGE 503

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 511

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 513

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 521

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 523

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 533

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 553

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 563

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 623

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal pipe collars; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; petrochemical metal pipes; boiler metal pipes; metal exchanger pipes and metal tube exchanger pipes; metal drilling pipes; steel and metal pipes and vessels used for transporting oil and fuel in the nature of ridgid metal tubing; metal tubes used in autoparts and safety devices, excluding metal horseshoes for racing and running horses and excluding anchors;WEDGE;

WEDGE 624

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE SIX TWO FOUR; WEDGE SIX HUNDRED TWENTY FOUR;WEDGE;

WEDGE 625

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 627

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 665

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE 667

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;WEDGE;

WEDGE XP

Steel and metal pipes and tubing, including their parts and fittings therefor; metal pipe and tube joints; metal junctions for pipes; seamless metal line pipes; welded metal line pipe; metal mother pipes; metal drilling pipes; steel metal pipes;