BOMCO F-1300/1600 Fluid End Assembly

1

Fluid End-Studded

AH130102-050100

Alloy steel (4140, quenched and tempered, tensile strength ≥ 900MPa)

1. High-pressure fatigue from repeated pump cycles; 2. Corrosion by acidic drilling fluid; 3. Thread wear during disassembly.

1. Inspect for cracks via ultrasonic testing quarterly; 2. Use corrosion-inhibiting drilling fluid; 3. Avoid over-tightening during assembly.

2

Cylinder Thread Ring

AH130101-0502

Carbon steel (Q355B) with zinc-nickel plating

1. Thread stripping from improper installation; 2. Corrosion in humid drilling environments; 3. Vibration-induced loosening.

1. Use torque wrench to meet 450-500 N·m standard; 2. Apply anti-corrosion grease before installation; 3. Recheck tightness after 80 operating hours.

3

Cylinder Head

AH130101-0503

Alloy steel (40CrNiMoA) with wear-resistant surface treatment

1. Impact damage from drilling fluid impurities; 2. High-temperature fatigue (exceeding 120℃); 3. Seal failure leading to internal corrosion.

1. Install filter screens to reduce fluid impurities; 2. Monitor operating temperature (keep ≤ 110℃); 3. Replace seals at first sign of leakage.

4

Cylinder Head Plug

AH130101-050600

Brass (H62) for corrosion resistance

1. Thread damage from over-tightening; 2. Corrosion by saltwater-based drilling fluid; 3. Fatigue from pressure fluctuations.

1. Torque to 150-180 N·m; 2. Use thread sealant for marine drilling; 3. Inspect for thread deformation before reinstallation.

5

Alignment Ring

AH130101-0507

Gray cast iron (HT250) with precision machining

1. Deformation from improper alignment; 2. Wear from cylinder head vibration; 3. Impact during assembly/disassembly.

1. Ensure coaxial alignment with cylinder head; 2. Check for flatness annually (tolerance ≤ 0.03mm); 3. Use professional tools for installation.

6

Liner Thread Ring

AH130101-0514

Alloy steel (4130) with heat treatment

1. Thread wear from frequent liner replacement; 2. High-pressure-induced stress concentration; 3. Corrosion from drilling fluid seepage.

1. Avoid excessive liner replacement frequency; 2. Clean threads before installation; 3. Apply anti-seize compound to prevent seizing.

7

Liner Lock

AH130101-0515B1

Carbon steel (Q235A) with anti-rust coating

1. Fatigue fracture from pressure fluctuations; 2. Loosening due to pump vibration; 3. Corrosion leading to brittle failure.

1. Inspect for cracks monthly; 2. Tighten to specified torque after each liner replacement; 3. Touch up anti-rust coating quarterly.

8

Piston Rod

AH130102-0504

Chrome-plated alloy steel (42CrMo), chrome layer thickness ≥ 0.05mm

1. Chrome layer wear from piston seal friction; 2. Bending from misalignment; 3. Corrosion from fluid leakage.

1. Lubricate piston seal regularly; 2. Check straightness quarterly (deviation ≤ 0.02mm/m); 3. Replace if chrome layer peels off.

9

Wear Plate

AH130102-0503

Tungsten carbide composite (WC-Co) for high wear resistance

1. Abrasion by drilling fluid impurities; 2. Impact from pressure surges; 3. Thermal fatigue from temperature changes.

1. Replace when wear exceeds 1mm; 2. Install shock absorbers to reduce pressure surges; 3. Maintain stable drilling fluid temperature.

1

Valve Guide(lower)

AH130101-050500

Bronze (CuSn10Pb1) for wear resistance and self-lubrication

1. Wear from valve stem sliding; 2. Contamination by drilling fluid impurities; 3. High-temperature oxidation.

1. Clean valve guide regularly to remove debris; 2. Replace if internal diameter wear exceeds 0.04mm; 3. Maintain fluid temperature ≤ 110℃.

2

Valve Spring

AH100101-0529

Spring steel (50CrVA) with heat treatment, hardness HRC 45-50

1. Fatigue failure from high-frequency compression; 2. Corrosion by moisture in drilling fluid; 3. Over-stretching during installation.

1. Replace springs every 6 months (or 5000 operating hours); 2. Inspect for deformation monthly; 3. Avoid over-compression during assembly.

3

Valve Assembly API 7

AH000002-0300

Alloy steel (4140) valve core with Stellite hardfacing

1. Wear from fluid impact and cavitation; 2. Sealing surface damage from impurities; 3. Fatigue from pressure cycles.

1. Install fluid filters to reduce impurities; 2. Inspect sealing surface for scratches monthly; 3. Replace per API 7K maintenance standards.

4

Valve Cover

AH130102-0502

Carbon steel (Q355B) with anti-corrosion coating

1. Deformation from uneven bolt torque; 2. Corrosion by drilling fluid splashes; 3. Impact damage during on-site operations.

1. Tighten bolts symmetrically (torque 250-300 N·m); 2. Clean and touch up coating monthly; 3. Use protective covers during transportation.

5

Flashboard Assembly

AH130101-050400B2

Stainless steel (304) with rubber sealing layer

1. Rubber layer aging from high temperature; 2. Stainless steel corrosion by acidic fluid; 3. Impact from fluid turbulence.

1. Replace rubber layer every 4 months; 2. Use neutral drilling fluid; 3. Inspect for rubber peeling during maintenance.

1

Cylinder Head Seal

AH130101-0508

Fluororubber (FKM) for high pressure/temperature resistance

1. High-temperature aging (exceeding 120℃); 2. Extrusion damage from over-tightening; 3. Chemical corrosion by drilling fluid additives.

1. Maintain operating temperature ≤ 110℃; 2. Control bolt torque to avoid over-compression; 3. Choose compatible fluid additives.

2

O-ring Φ95X5.3

530301010950053000

Nitrile rubber (NBR) with shore hardness 70±5

1. Compression set from long-term installation; 2. Surface scratches during assembly; 3. Oil incompatibility.

1. Replace O-rings every 6 months; 2. Use installation tools to avoid scratches; 3. Use mineral oil-based lubricants.

3

Valve Cover Seal

AH130101-0510

Asbestos-free fiber composite with rubber coating

1. High-temperature aging; 2. Over-tightening leading to material brittleness; 3. Fluid seepage causing corrosion.

1. Torque bolts per GB/T 1231 standards; 2. Replace during routine maintenance; 3. Inspect for fluid seepage weekly.

4

Liner Seal

AH130101-0512

Viton (FKM) for chemical and high-temperature resistance

1. Wear from liner rotation; 2. Extrusion damage from pressure surges; 3. Contamination by solid particles.

1. Clean liner surface before installation; 2. Install pressure relief valves to reduce surges; 3. Replace when seal lip wear is visible.

1

Nut 1 1/2-8UN

T501-2001

High-strength alloy steel (10.9 grade) with zinc plating

1. Thread wear from repeated assembly; 2. Corrosion in humid environments; 3. Vibration-induced loosening.

1. Use lock washers and thread locker; 2. Replace after 3 assembly cycles; 3. Store in dry, sealed containers.

2

Bolt 1 1/2-12UNF/1 1/2-8UN×5

T500-5007

High-strength alloy steel (12.9 grade)

1. Fatigue fracture from high pressure and vibration; 2. Thread damage from over-tightening; 3. Corrosion by drilling fluid.

1. Torque to 750-800 N·m; 2. Inspect for thread cracks quarterly; 3. Apply anti-corrosion grease before installation.

3

Washer 39

AH100101-0527

Spring steel (65Mn) with heat treatment

1. Compression fatigue from repeated load; 2. Deformation from uneven torque; 3. Rust leading to reduced elasticity.

1. Replace if washer loses elasticity; 2. Match washer size with bolt diameter; 3. Clean surface before installation.

4

Bolt 1 1/4-12UNS/1-8UNC×7 1/2

T500-5005

High-strength alloy steel (10.9 grade)

1. Torsional stress during installation; 2. Fatigue from pressure cycles; 3. Thread corrosion.

1. Use torque wrench for precise installation; 2. Re-tighten after 100 operating hours; 3. Apply zinc plating for extra corrosion protection.

5

Nut 1-8UNC

AH130102-050102

High-strength alloy steel (10.9 grade)

1. Loosening from pump vibration; 2. Thread wear from frequent disassembly; 3. Corrosion.

1. Use nylon insert lock nuts; 2. Avoid unnecessary disassembly; 3. Clean threads after each use.

1

Discharge Manifold

AH130101-0509

Alloy steel (4140) with anti-corrosion coating

1. High-pressure fatigue; 2. Corrosion by drilling fluid; 3. Wear from fluid turbulence.

1. Inspect for leaks monthly; 2. Clean internal channels to reduce turbulence; 3. Replace coating if peeling is found.

2

Hose Clamp No.3

061401030750000000

Stainless steel (304)

1. Loosening from vibration; 2. Corrosion in humid environments; 3. Over-tightening leading to deformation.

1. Tighten evenly to avoid deformation; 2. Inspect tightness weekly; 3. Replace if rust or deformation occurs.

3

Connection Pipe NPT8

AH130102-050500

Carbon steel (Q355B) with galvanized coating

1. Thread wear from installation; 2. Corrosion by drilling fluid; 3. Impact damage.

1. Use pipe thread sealant during installation; 2. Avoid over-tightening to prevent thread damage; 3. Use protective sleeves for transportation.

4

Elbow NPT3/8-M22×1.5

AH130102-0507

Brass (H62)

1. Thread damage from improper installation; 2. Corrosion by saltwater; 3. Pressure-induced cracking.

1. Torque to 200-220 N·m; 2. Use anti-corrosion tape for marine drilling; 3. Inspect for cracks before use.

5

Hose Assembly C-13X1-850

140507011301008530

Synthetic rubber (NBR) hose with stainless steel braid

1. Rubber aging from high temperature; 2. Braid wear from friction; 3. Pressure surges leading to burst.

1. Replace hose every 12 months; 2. Avoid bending beyond minimum radius; 3. Install pressure relief valves.

6

Connector NPT1/2-M22X1.5

AH130102-0509

Brass (H62)

1. Thread wear; 2. Corrosion by acidic fluid; 3. Loosening from vibration.

1. Clean threads before installation; 2. Use thread sealant; 3. Recheck tightness after 50 operating hours.

7

Right-angle Connector NPT1-NPT1/2

AH130102-010

Brass (H62)

1. Stress concentration at right angle; 2. Thread damage; 3. Corrosion.

1. Avoid excessive pressure at the elbow; 2. Install with proper alignment; 3. Apply anti-corrosion grease regularly.

Are these components fully compatible with both F-1300 and F-1600 mud pumps?

Yes, all listed parts are designed to fit both BOMCO F-1300 and F-1600 mud pumps, adhering to the same fluid end assembly specifications and API 7K standards for interchangeability and reliability.

What is the recommended maintenance cycle for fluid end assembly components?

For standard high-pressure drilling, inspect sealing parts (O-rings, liner seals) monthly, replace valves and springs every 6 months, and conduct full assembly inspection/overhaul annually to meet API 7K and BOMCO maintenance guidelines.

How to prevent fluid end leakage effectively?

Ensure proper torque for fasteners, replace worn seals promptly, use compatible drilling fluid to avoid corrosion, clean components regularly to remove impurities, and inspect thread integrity before each assembly.