Grant Prideco drill pipe and drill stem tubular products

Grant Prideco drill pipe, HWDP, drill collars, and high-torque rotary connections engineered for extended-reach and deepwater drilling.

Grant Prideco standard and ultra-high-strength drill pipe tubulars

Grant Prideco drill pipes manufactured under API and proprietary NOV metallurgical specifications provide deep drilling solutions. Configurations from standard E75 through high-strength V150 and UD165 reduce string hook loads and expand operational reach.

Tubular body outer diameters ranging from 2-3/8 to 6-5/8 inches for diverse borehole designs
Proprietary high-strength grades V150 and UD165 engineered for ultra-deep well profiles
H2Shield metallurgy resisting hydrogen sulfide stress cracking in hostile sour wells
Optimized wall thickness geometry minimizing mud circulation pressure drops downhole

Heavy weight drill pipe HWDP standard and spiral configurations

Grant Prideco heavy weight drill pipe creates a gradual stiffness transition between flexible drill pipes and rigid drill collars. The portfolio comprises standard welded configurations together with Tri-Spiral and Spiral-Wate geometries preventing differential sticking.

Nominal tube diameters spanning 2-7/8 to 6-5/8 inches with welded or integral tool joints
Integral non-welded forging architecture dedicated to specialized 2-7/8 inch sizes
Tri-Spiral helical grooves reducing borehole wall contact area during directional runs
Hardfacing wear alloy bands protecting intermediate upsets against abrasive formation wear

Drill collars for bit weight application and borehole stabilization

Grant Prideco drill collars form the bottom-hole assembly foundation delivering concentrated downward weight onto the drill bit. Heavy thick-wall tubular forgings maintain trajectory stability, dampen dynamic vibration, and prevent unwanted bending stresses in drilling strings.

Tool outside diameters from 3-1/8 to 11 inches in slick and spiral exterior profiles
Minimum yield strength of 110,000 psi for common dimensions through 6-7/8 inches
Controlled body hardness exceeding 285 Brinell hardness numbers through heat treatment
Precision machined slip and elevator recesses conforming to drilling handling rules

Delta high-torque rotary-shouldered drill pipe connections

Grant Prideco Delta rotary connections withstand severe torsional forces in deep horizontal wellbores. Engineered with a balanced thread profile, Delta connections accelerate makeup rotation, resist galling, and provide fatigue endurance for high-strength S135 drilling strings.

Connection sizes ranging from Delta 377 to Delta 663 accommodating tubes up to 6.625 inches
Exceptional allowable makeup torque capacity reaching 86,600 ft-lbs for tortuous wells
Reduced turn count during makeup trimming trip time and lowering rig floor exposure
Uniform thread load distribution mitigating shoulder yield and thread flank galling

Tool joints and protective hardbanding wear protection

Grant Prideco tool joints friction-welded onto upset pipe ends absorb primary torsional and tensile drilling stresses. Smooth protective hardbanding deposits protect both tool joint outer surfaces and the surrounding well structure against severe formation abrasion downhole.

Heat-treated high-alloy steel tool joints evaluated for Charpy V-notch toughness
Broad compatibility with non-abrasive protective hardband alloys and weld overlays
Precision CNC threading and shoulder face grinding ensuring gas-tight seal integrity
Straightforward field redressing procedures verified through global inspection criteria

Engineering calculations and Performance Calculator software

Proprietary Grant Prideco Performance Calculator digital software empowers drilling engineers to model drill string mechanical capacities. The tool generates technical data sheets for drill pipe, HWDP, collars, and connection torque limits tailored to specific borehole projects.

Tension, torsional strength, and burst pressure ratings computed for specific well depths
Tailored makeup torque recommendations adjusted for drilling thread compound friction factors
Generation of authoritative tubular specification sheets for well engineering programs
Residual capacity calculations accounting for measured tool joint outside diameter wear

Global tubular leadership and engineering heritage of Grant Prideco

As a core specialized tubular business unit within National Oilwell Varco (NOV), Grant Prideco delivers premier drill stem solutions for oilfield drilling contractors.

Manufacturing operations integrate automated pipe rolling lines, continuous induction heat treatment furnaces, and computer-controlled threading machinery. Automated ultrasonic wall inspection and metallurgical testing eliminate structural defects throughout the tube body.

Grant Prideco tubular strings operate across severe offshore environments, deep exploratory boreholes, and extended horizontal drilling profiles where high tensile loads and harsh subterranean pressures predominate.

Heavy weight drill pipe HWDP and Tri-Spiral borehole optimization

Grant Prideco heavy weight drill pipe creates a gradual stiffness progression between standard flexible drill pipes and rigid bottom hole assembly collars. The central upset section maintains separation between the tube body and the borehole wall during rotation.

Tri-Spiral and Spiral-Wate helical external geometries reduce wall contact area against filter cake, mitigating differential sticking risks in directional sections.

Smaller two-and-seven-eighths inch sizes utilize integral non-welded forging methods, eliminating heat-affected zone discontinuities and delivering fatigue longevity under cyclical bending stresses.

Drill collars for concentrated bit weight and trajectory stability

Grant Prideco drill collars provide the heavy foundation of the bottom hole assembly, applying concentrated axial force onto rock bits to maximize penetration rates.

Machined from high-grade alloy steel bars subjected to full-length thermal quenching and tempering, they provide a minimum yield strength of 110,000 psi through six-and-seven-eighths inch diameters. Surface hardness meets or exceeds 285 Brinell hardness numbers per ASTM A370 standards.

The thick-wall tubular rigidity prevents borehole deviation while dampening severe torsional and axial vibrations during rotary drilling.

Delta high-torque rotary connections accelerating rig floor operations

Grant Prideco Delta rotary connections transform drill string assembly speed through a balanced dual-shoulder thread geometry. Compared to traditional API connections, Delta tool joints deliver more than fifty percent higher allowable makeup torque within streamlined connection outside diameters.

Fewer makeup rotations to full torque engagement accelerate trip times on the drilling rig floor, minimizing crew exposure. The balanced thread load distribution eliminates thread galling and flank distortion during rapid repetitive make-and-break cycles under high torsional loads.

Tool joint friction welding and hardbanding wear protection methods

Grant Prideco tool joints are joined onto upset tubular ends utilizing automated inertia friction welding and controlled post-weld induction tempering.

To prevent abrasive outer diameter reduction from abrasive formations and minimize friction against subterranean well lining tubes, non-cracking hardband alloy deposits are applied. These smooth hardfacing bands prolong tool joint service life without grooving adjacent borehole walls.

Field inspection guidelines and lathe machining tolerances enable multiple shoulder face refacings across global service facilities.

Wellbore modeling software and Performance Calculator specifications

The Grant Prideco Performance Calculator digital engineering software provides well planners with structural analysis tools for complex drilling strings.

The software calculates operational tension, torsional resistance, and internal pressure thresholds based on borehole inclination, mud density, and well geometry.

Drilling engineers obtain makeup torque recommendations calibrated to drilling compound friction factors, as well as residual tensile capacities accounting for tool joint outer diameter wear, ensuring drilling safety margins downhole.

Grant Prideco and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Grant Prideco and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.