BOMCO F-1300/1600 Fluid End Assembly (Supplemental Components)

1

Liner Lock Ring

AH130101-0518

Alloy steel (4130) with heat treatment, hardness HRC 40-45

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

1. Clean threads before installation and apply anti-seize compound; 2. Avoid over-tightening to prevent thread deformation; 3. Replace if thread wear exceeds 0.03mm.

2

Liner

AH130102-051200

Nitrided alloy steel (42CrMo), nitrided layer thickness ≥ 0.1mm

1. Abrasion by solid particles in drilling fluid; 2. Cavitation damage from pressure fluctuations; 3. Thermal fatigue from temperature changes.

1. Install high-efficiency fluid filters to reduce impurities; 2. Monitor pressure stability to avoid cavitation; 3. Replace when inner diameter wear exceeds 0.05mm.

3

Liner End Cover

AH130101-0520

Carbon steel (Q355B) with anti-corrosion coating

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

1. Tighten bolts symmetrically per GB/T 1231 standards; 2. Inspect for leakage weekly and touch up coating if needed; 3. Use protective covers during transportation.

4

Piston

AH130102-050800

Ductile iron (QT600-3) with polyurethane sealing layer

1. Wear from friction with liner inner wall; 2. Sealing layer aging from high temperature; 3. Damage by fluid impurities.

1. Maintain liner inner wall smoothness; 2. Replace piston if sealing layer peels or wears over 1mm; 3. Keep drilling fluid clean to reduce abrasive particles.

5

Piston Rod Clamp

AH130102-050600

Alloy steel (40Cr) with quenched and tempered treatment

1. Loosening due to pump vibration; 2. Fatigue fracture from repeated clamping force; 3. Corrosion from drilling fluid splashes.

1. Tighten to specified torque (300-350 N·m) and recheck after 80 operating hours; 2. Inspect for cracks quarterly via magnetic particle testing; 3. Apply anti-corrosion grease regularly.

6

Piston Seal

AH100101-0515

Fluororubber (FKM) with shore hardness 75±5, high-pressure resistance

1. Wear from friction with liner; 2. High-temperature aging (exceeding 120℃); 3. Chemical corrosion by drilling fluid additives.

1. Replace every 3-4 months (or 3000 operating hours); 2. Maintain fluid temperature ≤ 110℃; 3. Use compatible fluid additives to avoid seal degradation.

7

Piston Nut 1 1/2-8UN

T501-303.0

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

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

1. Use thread locker (Loctite 243) for secure fastening; 2. Replace after 3 assembly cycles; 3. Store in dry, sealed containers when not in use.

1

Valve Guide (upper)

AH100101-0510

Bronze (CuSn8Pb2) for self-lubrication and wear resistance

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

1. Clean guide internal channels monthly to remove debris; 2. Replace if internal diameter wear exceeds 0.04mm; 3. Maintain stable fluid temperature to avoid oxidation.

2

Valve Guide Retainer

AH100101-0512

Carbon steel (Q235A) with anti-rust coating

1. Loosening due to pump vibration; 2. Fatigue from repeated valve impact; 3. Corrosion leading to brittle failure.

1. Tighten to specified torque during installation; 2. Inspect for looseness monthly; 3. Replace if rust or cracks are found.

1

O-ringΦ200X7

530301012000070000

Nitrile rubber (NBR) with good oil resistance and elasticity

1. Compression set from long-term installation; 2. Surface scratches during assembly; 3. Incompatibility with lubricating oil.

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

2

O-ringΦ185X7

530301011850070000

Nitrile rubber (NBR) with shore hardness 70±5

1. High-temperature aging; 2. Extrusion damage from over-tightening; 3. Corrosion by acidic drilling fluid.

1. Maintain operating temperature ≤ 100℃; 2. Control assembly torque to avoid over-compression; 3. Add corrosion inhibitors to acidic fluid.

3

O-ring Φ345X7

530301013450070000

Fluororubber (FKM) for high pressure and chemical resistance

1. Wear from friction with mating parts; 2. Pressure surges leading to extrusion; 3. Aging from long-term exposure to air.

1. Inspect mating part surfaces for smoothness before installation; 2. Install pressure relief valves to reduce surges; 3. Store O-rings in sealed, cool environments.

1

Bolt 7/8-9UNC×2

T500-1027

High-strength alloy steel (10.9 grade)

1. Fatigue fracture from pump vibration; 2. Thread wear from repeated assembly; 3. Corrosion by drilling fluid.

1. Torque to 450-500 N·m; 2. Use lock washers and thread locker; 3. Inspect for thread cracks quarterly.

2

Stud 1 1/2-8UN×10 1/2

T500-7002

High-strength alloy steel (12.9 grade)

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

1. Use torque wrench for precise installation; 2. Replace after 2 service cycles; 3. Apply anti-corrosion plating for marine drilling.

3

Nut 1 1/2-8UN

T507-2001

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

1. Vibration-induced loosening; 2. Thread wear from frequent disassembly; 3. Plating wear leading to corrosion.

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

4

Nut 1 1/4-8UN

T501-2002

High-strength alloy steel (10.9 grade)

1. Uneven torque leading to thread damage; 2. Corrosion in humid environments; 3. Fatigue from repeated load.

1. Tighten nuts evenly; 2. Apply anti-corrosion grease; 3. Replace if thread deformation is found.

5

Stud 1 1/4-12UNF/1 1/4-8UN×7 3/4

T500-5008

High-strength alloy steel (10.9 grade)

1. Thread wear from improper installation; 2. Fatigue from vibration; 3. Corrosion by drilling fluid splashes.

1. Clean threads before installation; 2. Re-tighten after 100 operating hours; 3. Use protective caps to prevent fluid contact.

6

Stud 1 1/2-12UNF/1 1/2-8UN×6 3/4

T500-5006

High-strength alloy steel (12.9 grade)

1. Over-tightening leading to thread stripping; 2. Fatigue fracture from high pressure; 3. Corrosion.

1. Torque to 700-750 N·m; 2. Inspect for cracks via ultrasonic testing annually; 3. Apply anti-rust coating regularly.

7

Bolt 3/8-16UNC×3/4

AH050102-0509

High-strength alloy steel (8.8 grade)

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

1. Use thread locker (Loctite 243); 2. Replace after 4 assembly cycles; 3. Store in dry environments when not in use.

8

Nut 1-8UNC

T501-1003

High-strength alloy steel (8.8 grade) with zinc plating

1. Plating wear leading to corrosion; 2. Vibration-induced loosening; 3. Thread wear.

1. Use lock washers; 2. Inspect for rust monthly; 3. Replace if thread wear is visible.

9

Bolt 1-8UNC×3 1/2

T500-1023

High-strength alloy steel (10.9 grade)

1. Fatigue from repeated load cycles; 2. Thread damage from over-tightening; 3. Corrosion by drilling fluid.

1. Torque to 350-400 N·m; 2. Re-tighten after 150 operating hours; 3. Clean and dry bolts after use.

10

Stud 1 1/2-8UN×22 1/4

AH130102-0513

High-strength alloy steel (12.9 grade)

1. Bending from misalignment; 2. Fatigue fracture from high pressure; 3. Thread corrosion.

1. Ensure coaxial alignment during installation; 2. Inspect straightness quarterly; 3. Apply anti-corrosion grease to threads.

11

Bolt 1-8UNC×4 1/4

T500-1024

High-strength alloy steel (10.9 grade)

1. Torsional stress during installation; 2. Vibration-induced fatigue; 3. Corrosion.

1. Use torque wrench for precise installation; 2. Check for tightness monthly; 3. Replace if cracks are found.

1

Suction Manifold

AH130102-051100

Alloy steel (4140) with anti-corrosion coating

1. Corrosion by drilling fluid; 2. Wear from fluid turbulence; 3. Fatigue from pressure fluctuations.

1. Clean internal channels monthly to reduce turbulence; 2. Inspect for leaks and coating peeling weekly; 3. Use corrosion-inhibiting drilling fluid.

2

Suction Dampener

AH0000050100

Carbon steel (Q355B) with rubber damping element

1. Rubber element aging; 2. Corrosion of the steel body; 3. Damage from pressure surges.

1. Replace rubber damping element annually; 2. Inspect steel body for corrosion monthly; 3. Install pressure relief valves to reduce surges.

3

Suction Flange（I）

AH100101-0525

Carbon steel (Q355B) with flange face anti-corrosion treatment

1. Flange face wear from repeated assembly; 2. Corrosion by drilling fluid; 3. Leakage leading to pressure loss.

1. Clean flange face before assembly and use gaskets; 2. Tighten bolts symmetrically; 3. Inspect flange face for scratches monthly.

4

Suction Flange（II）

AH100101-0526

Carbon steel (Q355B) with flange face anti-corrosion treatment

1. Same as Suction Flange (I); 2. Misalignment leading to uneven stress.

1. Ensure coaxial alignment with suction manifold; 2. Follow the same maintenance steps as Suction Flange (I); 3. Replace if flange face wear exceeds 0.02mm.

5

Screw Plug NPT 1 1/2

T506-1007

Brass (H62) for corrosion resistance

1. Thread damage from over-tightening; 2. Corrosion by saltwater or acidic fluid; 3. Fatigue from pressure cycles.

1. Torque to 180-220 N·m; 2. Use thread sealant for marine drilling; 3. Inspect thread integrity before reinstallation.

6

Suction Lock Plate for Packing

T505-1006

Carbon steel (Q235A) with anti-rust coating

1. Bending from improper installation; 2. Corrosion leading to breakage; 3. Loosening from vibration.

1. Install flat against packing; 2. Inspect for cracks monthly; 3. Tighten to specified torque during maintenance.

1

Shims

AH130101-052300

Spring steel (65Mn) with precision thickness control

1. Fatigue deformation from long-term compression; 2. Corrosion in humid environments; 3. Damage during clearance adjustment.

1. Select appropriate thickness for precise clearance adjustment; 2. Avoid over-tightening to prevent deformation; 3. Store unused shims in dry, sealed containers.

2

Stainless wire Φ1.6 L=1830

40104030160001900

Stainless steel (304) for corrosion resistance

1. Fatigue fracture from repeated bending; 2. Wear from friction with other components; 3. Oxidation in high-temperature environments.

1. Avoid excessive bending during use; 2. Cut to appropriate length to prevent slack; 3. Avoid exposure to temperatures exceeding 200℃.

3

Loctite 243

170506010100243000

Anaerobic adhesive (243 grade, medium strength)

1. Degradation from high temperature; 2. Contamination before application; 3. Expiration of service life.

1. Store in cool, dry environments (5-25℃); 2. Apply to clean, dry threads; 3. Use before expiration date and allow 24 hours for full curing.

How to match these supplemental components with existing F-1300/1600 fluid end parts?

All supplemental parts follow BOMCO original specifications, fully compatible with existing F-1300/1600 fluid end assemblies. Ensure part numbers match during procurement, and follow BOMCO maintenance manual for installation to maintain API 7K compliance.

What is the maintenance focus for liner and piston components?

Prioritize cleaning drilling fluid to reduce abrasive particles, inspect liner inner wall wear monthly, replace piston seals every 3-4 months, and ensure piston rod clamp torque is up to standard to avoid liner damage and fluid leakage.

How to ensure effective use of Loctite 243 for fastener locking?

Apply Loctite 243 to clean, dry threads (avoid oil or debris), assemble fasteners immediately, torque to specified values, and allow 24 hours for full curing before pump operation. Do not use on worn or damaged threads.