National NOV Replacement Mud Pump Parts

1

07499400, 07499450, 07499500, 07499550, 07499600, 07499625, 07499650, 07499700

High-strength alloy steel, heat-treated for hardness (HRC 45-50), corrosion-resistant coating

1. Abrasive particles in drilling fluid; 2. Long-term high-pressure cyclic loading; 3. Improper lubrication

1. Filter drilling fluid to control solid content below 2% (per API 13C standard); 2. Replace lubricant every 200 operating hours; 3. Monitor pressure fluctuations and stop operation if exceeding ±10% of rated value.

2

07506400, 07506450, 07506500, 07506550, 07506600, 07506625, 07506650, 07506700

Ductile iron (ASTM A536 Grade 80-55-06) with nitrided surface treatment

1. Thermal fatigue from repeated temperature changes; 2. Cavitation damage in low-pressure zones; 3. Misalignment during installation

1. Preheat parts to 40-60℃ before installation to avoid thermal shock; 2. Maintain suction pressure above 0.2 MPa to prevent cavitation; 3. Use precision alignment tools to ensure coaxiality ≤0.05 mm.

3

07515400, 07515450, 07515500, 07515550, 07515600, 07515625, 07515650, 07515700

Stainless steel (316L) with reinforced PTFE seals, suitable for corrosive media

1. Chemical corrosion from acidic/alkaline drilling fluid; 2. Seal aging due to high temperature; 3. Contamination by foreign particles

1. Test drilling fluid pH (maintain 7.5-9.0) and add corrosion inhibitor if needed; 2. Keep operating temperature below 120℃; 3. Install a secondary filter at the inlet to trap particles ≥5μm.

1

07547450, 07547500, 07547600, 07547625, 07547650, 07547700

Nickel-chromium-molybdenum alloy (4340 steel), quenched and tempered, hardness HRC 50-55

1. High-impact load from sudden pressure surges; 2. Sulfide stress cracking (SSC) in sour environments; 3. Fatigue failure from long-term cyclic stress

1. Install a pressure relief valve set to 110% of rated pressure; 2. Ensure compliance with NACE MR0175/ISO 15156 for sour service; 3. Conduct non-destructive testing (NDT) every 500 operating hours.

2

07466500, 07466550, 07466600, 07466625, 07466650, 07466700

Ceramic-reinforced alloy, alumina ceramic insert with metal matrix composite (MMC) base

1. Severe abrasion from high-solid-content drilling fluid; 2. Thermal shock from rapid temperature changes; 3. Mechanical impact during maintenance

1. Use drilling fluid with solid content ≤1% for deep well operations; 2. Avoid rapid cooling after high-temperature operation; 3. Handle with non-metallic tools to prevent ceramic chipping.

3

07495450, 07495500, 07495550, 07495600, 07495625, 07495650

Titanium alloy (Ti-6Al-4V) for lightweight, high-strength applications, passivated surface

1. Galvanic corrosion when in contact with carbon steel; 2. Erosion from high-velocity fluid; 3. Stress corrosion cracking in chloride environments

1. Use insulating gaskets between titanium and carbon steel parts; 2. Control fluid velocity below 8 m/s; 3. Keep chloride content in drilling fluid below 500 ppm.

1

07413400, 07413450, 07413500, 07413550, 07413600, 07413650, 07413700

Precision-cast carbon steel (AISI 1045), machined to tolerance ±0.02 mm, zinc-plated for rust protection

1. Wear from slight misalignment (even within tolerance); 2. Corrosion from moisture in storage; 3. Thread damage during installation

1. Use torque wrenches to apply specified torque (per NOV maintenance manual); 2. Store in dry environment with humidity ≤60%; 3. Inspect threads for burrs before installation and tap if necessary.

2

07497400, 07497450, 07497500, 07497550, 07497600, 07497625, 07497650, 07497700

Brass alloy (C36000) with precision machining, lead-free for environmental compliance

1. Galling between brass and steel parts; 2. Erosion from low-viscosity drilling fluid; 3. Overheating due to poor ventilation

1. Apply anti-galling compound (e.g., molybdenum disulfide) on mating surfaces; 2. Maintain drilling fluid viscosity at 30-50 cP; 3. Ensure adequate ventilation around pump to keep temperature ≤80℃.

3

07574400, 07574450, 07574500, 07574550, 07574600

Polyetheretherketone (PEEK) polymer with glass fiber reinforcement, temperature resistance up to 260℃

1. Thermal degradation at excessive temperatures; 2. Mechanical stress from over-tightening; 3. Chemical attack from aromatic solvents

1. Monitor operating temperature and avoid prolonged exposure above 200℃; 2. Tighten to 80% of metal part torque; 3. Avoid contact with aromatic drilling fluid additives.

1

07590450HP, 07590500HP, 07590550HP, 07590600HP, 07493650HP

High-performance alloy steel (H13 tool steel), hot isostatic pressed (HIP) for density ≥99.9%

1. Extreme thermal stress in high-power (HP) pump operations; 2. Wear from abrasive proppants (in fracturing pumps); 3. Fatigue cracking at stress concentrations

1. Limit continuous operation at maximum power to 4 hours; 2. Use proppant-free fluid for startup/shutdown; 3. Round edges of stress concentrations per R3 radius standard.

2

07493091, 07493089, 07493087, 07493085, 07493083, 07493081

Inconel 718 superalloy, solution-treated and aged, resistant to high temperature and oxidation

1. Oxidation at temperatures above 600℃; 2. Creep deformation under long-term high load; 3. Carbide precipitation causing brittleness

1. Operate below 550℃ to prevent oxidation; 2. Avoid static load at high temperature for over 2 hours; 3. Conduct periodic heat treatment to restore microstructure.

3

07473087, 07473086, 07473084, 07473082, 07473080, 07473046, 07473044, 07473042, 07473040

Hastelloy C276, welded with ERNiCrMo-4 filler metal, compliant with ASME BPVC Section IX

1. Severe corrosion from mixed acids (HCl, H2SO4) in acidizing operations; 2. Weld joint corrosion; 3. Pitting corrosion in chloride-rich environments

1. Flush parts with neutralizing fluid after acidizing; 2. Inspect weld joints via radiography (RT) annually; 3. Use deionized water for cleaning to avoid chloride contamination.

How to confirm compatibility between these parts and my NOV mud pump model?

All parts are engineered for NOV mud pumps. Provide your pump model (e.g., F-1300, PZ-8) to our technical team for precise matching, or cross-check with the NOV original parts catalog (P/N reference in the guide).

What is the recommended inspection interval for these replacement parts?

For standard conditions, inspect every 200 operating hours; for harsh environments (sour, high-solid), shorten to 100 hours. Focus on wear, corrosion, and seal integrity, following API 7K inspection protocols.

Can these parts be used in fracturing pumps with proppant circulation?

HP models (marked with HP) are suitable for fracturing pumps. Ensure to use proppant-free fluid during startup/shutdown and control proppant concentration ≤5 ppg to minimize abrasive wear.