GRANT PRIDECO, L.P.

CRUSHFREE

Parts for drilling machines;Metal tubes; metal tubes for industrial use; metallic-pipes and tubes; metallic tubes and pipes for use in the oil and gas industries; metallic tubes and pipes for the extraction of hydrocarbon compounds ; metallic tubular rods for oil and gas well drilling; metallic tubes and pipes for drilling oil and gas wells; metallic tubes and pipes for offshore drilling of wells; metallic tubes and pipes, namely, oil and gas well landing strings; metallic tubes and pipes used for completion equipment in connection with oil and gas wells; steel tubes and pipes for use in the oil and gas industries;CRUSH FREE;

DELTA

Threaded metal drill pipe connections used on metal drill pipe for the drilling of oil and gas wells and other earth boreholes;

EIS

Metal pipes, tubes, and connections for use in the production of oil and gas from wells and for the drilling of oil and gas wells;

GRANT PRIDECO

Metal tubular goods and couplings, namely, metal tubes and metal pipe couplings; metal drill pipes for use in the exploration and production of oil and gas; metal thread protectors for drill pipe; metal drill collars; metal plugs; metal rotary kellys; metal rotary subs;

GRANT PRIDECO DOUBLE SHOULDER

Metal threaded connectors, namely, connections for metal tubulars used for drilling oil and gas wells and other earth boreholes;DOUBLE SHOULDER;

H2SHIELD

Metal drill pipes for use in well boring;H TWO SHIELD;

HI TORQUE

DRILL PIPE CONNECTOR;HIGH TORQUE;

HI TORQUE

Metal drill pipe connectors;HIGH TORQUE;

PLATINUMPLUS

Welded wire for drill pipe tool joints;PLATINUM PLUS;

SMOOTH EDGE

metal drill collar box connection;

SMOOTHEDGE

Tool joints and tool joints as a component of drill pipe, all made of metal;SMOOTH EDGE;

SPIRALINE

Issue New Certificate To: Grant Prideco, L.P., 1330 Post Oak Blvd., Suite 2700, Houston, TX 77056, a Delaware Corporation;threaded metal tubular components, namely well liners and casing;

SRT

Metal drill collar box connection;

SST

threaded metal tool joints, drill collars, and drill pipe for use in drilling subterranean oil and gas wells;

SUPER SMOOTH-X

hardface surfaces sold as a component of earth drilling tool joints;

TT-M

Threaded metal drill pipe connections used on metal drill pipe for the drilling of oil and gas wells and other earth boreholes;

TUFF-WELD

THREADED CONNECTORS, TOOL JOINTS AND COLLARS, WELDED TO PIPE;TOUGH-WELD;

TURBOTORQUE-M

Threaded metal drill pipe connections used on metal drill pipe for the drilling of oil and gas wells and other earth boreholes;TURBO TORQUE-M;

TURBOTORQUE-M

Threaded metal drill pipe connections used on metal drill pipe for the drilling of oil and gas wells and other earth boreholes;TURBO TORQUE-M;

V150

Metal drill pipe and tool joints;V ONE HUNDRED FIFTY; V ONE FIVE ZERO;

XD

METAL DRILL PIPE;

XF

Metal pipes, tubes, and connections for use in the production of oil and gas from wells and for the drilling of oil and gas wells;

XT

threaded metal drill pipe connections used on metal drill pipe for the drilling of oil and gas well and other earth boreholes;

XT

Threaded metal drill pipe connections used on metal drill pipe for the drilling of oil and gas well and other earth boreholes;