Core Spare Parts Catalog for Lanzhou LS-National Drilling Equipment-2

1

Liner 107.35.110.30

Alloy cast iron (HT300) with nitriding treatment; inner wall hardness HRC 58-62; surface roughness Ra ≤ 0.8 μm; dimensional tolerance IT7

1. Abrasive wear caused by long-term scouring of high-sand content mud; 2. Thermal fatigue cracking due to frequent start-stop and temperature fluctuations

1. Control mud sand content ≤ 10% (mass fraction) and equip with 20-micron high-precision desander; 2. Avoid full-load start-stop, preheat the pump body in low-temperature environments

2

Liner 107.35.110.31

Nodular cast iron (QT500-7) with carburizing treatment; inner wall hardness HRC 55-60; impact resistance ≥ 15 J/cm²

1. Erosion wear at the port due to high-velocity mud flow; 2. Corrosion caused by chemical additives in oil-based mud

1. Install anti-erosion rings at the liner ports; 2. Verify compatibility of mud additives with the liner material before use

3

Liner 107.35.110.32

Chrome-molybdenum alloy steel (35CrMo) with quenching and tempering; overall hardness HRC 32-38; inner wall chrome plating

1. Chrome plating peeling due to improper assembly (scratching by piston); 2. Fatigue wear due to long-term high-pressure operation

1. Use a guide sleeve during assembly to avoid piston scratching; 2. Operate within the rated pressure range (≤ 35 MPa)

4

Liner 107.35.110.33

Stainless steel (316L); corrosion-resistant; suitable for acid-base mud environments; surface passivation treatment

1. Pitting corrosion caused by chloride ions in offshore saltwater mud; 2. Wear due to lack of lubrication in dry-running conditions

1. For offshore use, enhance surface anti-corrosion coating; 2. Ensure sufficient mud lubrication, avoid dry running

5

Liner 107.35.110.34

Tungsten carbide composite; ultra-high wear resistance; hardness HRC 70-75; bonding strength ≥ 350 MPa

1. Cracking due to thermal shock from sudden temperature changes; 2. Bonding layer failure due to excessive vibration

1. Control the temperature rise rate of the pump body ≤ 5℃/min; 2. Install vibration dampers between the liner and cylinder block

6

Liner 107.35.110.35

Aluminum bronze (ZCuAl10Fe3); high strength; wear-resistant; suitable for low-temperature environments (-40℃ to 120℃)

1. Deformation caused by uneven cooling in low-temperature environments; 2. Wear of the mating surface due to improper fit with the cylinder block

1. In low-temperature environments, keep the liner at room temperature before installation; 2. Control the fit tolerance between liner and cylinder block within 0.015-0.03 mm

7

Liner 107.35.110.22

Gray cast iron (HT250) with phosphating treatment; inner wall honing; surface roughness Ra ≤ 1.2 μm

1. Wear due to long-term low-speed operation (insufficient lubrication); 2. Corrosion caused by moisture intrusion during storage

1. Maintain the minimum operating speed ≥ 200 rpm; 2. Store spare liners in a dry environment (humidity ≤ 60%) with anti-rust oil

8

Liner 107.35.110.23

Alloy steel (42CrMo) with nitriding treatment; surface hardness HRC 55-60; fatigue strength ≥ 600 MPa

1. Fatigue cracking of the outer wall due to long-term pressure fluctuations; 2. Thread wear due to repeated disassembly

1. Regularly inspect pressure fluctuations (control within ±5% of rated pressure); 2. Use a torque wrench for disassembly and assembly (specified torque: 380-420 N·m)

9

Liner 107.35.110.24

Copper-based alloy (ZCuSn10Pb1); self-lubricating; low friction coefficient (≤ 0.15); suitable for high-speed operation

1. Wear of the self-lubricating layer due to high-speed scouring; 2. Damage caused by foreign particles entering the cylinder

1. Limit the maximum operating speed ≤ 1500 rpm; 2. Install a high-precision filter in the mud inlet pipeline

10

Liner 107.35.110.25

Nickel-based alloy; high-temperature resistant (up to 250℃); corrosion-resistant; suitable for high-temperature mud systems

1. Oxidation wear at high temperatures; 2. Seal failure due to thermal expansion and contraction

1. Regularly check the oxidation degree of the liner surface; 2. Use high-temperature resistant seals (FKM rubber) matching the liner

11

Liner 107.35.110.26

Carbon steel (Q235B) with anti-corrosion coating; cost-effective; suitable for low-pressure mud pump systems

1. Corrosion of the coating due to long-term contact with water-based mud; 2. Deformation caused by excessive installation pressure

1. Reapply anti-corrosion coating every 6 months; 2. Avoid over-pressing during installation (installation pressure ≤ 50 MPa)

12

Liner 107.35.110.27

Ceramic composite; ultra-high hardness (HRC ≥ 80); wear resistance 5-8 times that of alloy steel

1. Brittle cracking due to impact during transportation/installation; 2. Bonding failure due to improper thermal treatment

1. Use shock-absorbing packaging during transportation; 2. Strictly follow the manufacturer's thermal treatment requirements before installation

1

Piston 107.114.00

Aluminum alloy (6061) with hard anodizing; piston head: nitrile rubber (NBR) seal; lightweight; high precision

1. Wear of the rubber seal due to long-term friction with the liner; 2. Deformation of the piston rod due to misalignment

1. Replace the piston seal every 800 operating hours; 2. Check the coaxiality of the piston and liner monthly (deviation ≤ 0.15 mm)

2

Piston 107.116.00

Carbon steel (45#) with quenching and tempering; piston head: fluororubber (FKM) seal; high strength; high-temperature resistant

1. Thermal deformation of the piston head due to high-temperature mud; 2. Corrosion of the piston rod due to mud intrusion

1. Operate within the maximum temperature limit (≤ 180℃); 2. Regularly inspect the piston rod seal for leakage

3

Piston 107.117.00

Stainless steel (304); piston head: ethylene propylene rubber (EPDM) seal; corrosion-resistant; suitable for acid-base environments

1. Erosion of the piston head by acid-base mud; 2. Loosening of the piston head fastening bolts due to vibration

1. Regularly check the corrosion status of the piston head; 2. Tighten the fastening bolts every 500 operating hours (torque: 120-150 N·m)

4

Piston 107.118.00

Alloy steel (42CrMo); piston head: polyurethane (PU) seal; wear-resistant; high elasticity

1. Wear of the PU seal due to abrasive mud; 2. Fatigue cracking of the piston rod due to alternating loads

1. Control the mud abrasive particle size ≤ 50 μm; 2. Avoid sudden load changes (load change rate ≤ 10%/s)

5

Piston 107.119.00

Titanium alloy; lightweight (density 4.5 g/cm³); high strength; corrosion-resistant; suitable for offshore drilling

1. Salt spray corrosion in offshore environments; 2. Wear of the piston pin due to insufficient lubrication

1. Apply anti-salt spray coating to the piston surface; 2. Inject high-temperature lubricating grease (NLGI Grade 2) into the piston pin every 400 operating hours

6

Piston 107.120.00

Gray cast iron (HT250); piston head: silicone rubber (VMQ) seal; cost-effective; suitable for low-temperature environments

1. Hardening and cracking of the silicone rubber seal in low temperatures; 2. Wear of the piston skirt due to long-term friction

1. In low-temperature environments (-40℃ to 0℃), use low-temperature resistant seals; 2. Maintain sufficient lubrication between the piston skirt and liner

7

Piston 107.122.00

Copper alloy (H62); piston head: perfluoroelastomer (FFKM) seal; chemical resistant; suitable for harsh chemical mud

1. Chemical corrosion of the piston head by aggressive mud additives; 2. Deformation of the piston due to uneven heating

1. Verify compatibility of mud additives with FFKM before use; 2. Ensure uniform heat dissipation of the pump body

8

Piston 107.06.64.00

Alloy steel (35CrMo) with nitriding treatment; piston head: double-layer NBR seal; high sealing performance

1. Seal failure due to mud particle intrusion between the double layers; 2. Wear of the nitrided layer due to improper assembly

1. Install a pre-filter in the mud inlet; 2. Use a guide tool during assembly to avoid scratching the nitrided layer

9

Piston 107.06.66.00

Stainless steel (316L) with passivation treatment; piston head: FKM seal; corrosion-resistant; suitable for high-pressure systems

1. Seal extrusion deformation under high pressure; 2. Corrosion of the piston rod thread due to repeated disassembly

1. Operate within the rated pressure (≤ 40 MPa); 2. Apply thread sealant during assembly to reduce wear

10

Piston 107.06.68.00

Aluminum bronze (ZCuAl10Fe3); piston head: EPDM seal; wear-resistant; impact-resistant

1. Impact damage to the piston head during sudden pressure surges; 2. Wear of the piston ring due to long-term use

1. Install a pressure relief valve to avoid pressure surges; 2. Replace the piston ring every 1000 operating hours

11

Piston 107.06.70.00

Nickel-chromium alloy; high-temperature resistant (up to 220℃); piston head: high-temperature resistant FKM seal

1. Oxidation of the piston surface at high temperatures; 2. Seal aging due to long-term high-temperature exposure

1. Regularly inspect the oxidation layer on the piston surface; 2. Replace the seal every 600 operating hours in high-temperature environments

12

Piston 107.11.130.00

42CrMoV alloy steel; ultra-high strength (tensile strength ≥ 1200 MPa); piston head: PU seal; suitable for heavy-load operation

1. Fatigue failure of the piston rod due to long-term heavy loads; 2. Wear of the seal due to high-speed reciprocation

1. Avoid operating at more than 110% of the rated load; 2. Limit the maximum reciprocating speed ≤ 300 times/min

13

Piston 107.11.135.00

Stainless steel (321); piston head: VMQ seal; low-temperature resistant (-50℃ to 150℃); suitable for cold region drilling

1. Brittleness of the piston rod in ultra-low temperatures; 2. Seal failure due to ice crystal intrusion

1. Preheat the piston to room temperature before use in ultra-low temperatures; 2. Ensure the mud is free of ice crystals

1

Valve and seat 107.11.140.00

Valve: tungsten carbide; Seat: Stellite alloy; sealing surface hardness HRC 60-65; wear-resistant

1. Wear of the sealing surface due to high-velocity mud scouring; 2. Impact damage during valve closing

1. Control the mud flow rate within 8-12 m/s; 2. Adjust the valve closing speed to reduce impact (closing time ≥ 0.2 s)

2

Valve and seat 107.11.144.00

Valve: ceramic composite; Seat: nickel-based alloy; corrosion-resistant; high-temperature resistant (up to 200℃)

1. Ceramic valve cracking due to thermal shock; 2. Corrosion of the seat by chemical mud additives

1. Avoid sudden temperature changes of the pump body; 2. Regularly check the chemical composition of the mud

3

Spring 107.11.110.16

50CrVA spring steel; quenched and tempered; surface shot peening; elastic limit ≥ 1200 MPa; fatigue life ≥ 10⁶ cycles

1. Fatigue failure due to long-term reciprocating compression; 2. Corrosion caused by moisture in the air during storage

1. Replace the spring every 1200 operating hours; 2. Store spare springs in a dry, sealed container with anti-rust agent

1

Bushing 101-0401-03-19-008

Copper-based alloy (ZCuSn10Pb1); self-lubricating; low friction coefficient; inner diameter tolerance H8

1. Wear of the inner hole due to long-term reciprocating movement of the valve stem; 2. Scuffing caused by foreign particles entering the gap

1. Inject lubricating grease every 300 operating hours; 2. Install a dust cover at the bushing port to prevent particle intrusion

2

Seal, ring joint 7602-0661-11

Nitrile rubber (NBR); Shore hardness 75±5; oil-resistant; compliant with ISO 3601-1:2012; suitable for oil-based mud

1. Aging and hardening due to long-term high-temperature exposure; 2. Damage caused by excessive compression deformation

1. Replace the seal every 500 operating hours; 2. Control the compression amount within 15-20% of the cross-sectional diameter

1

Adapter 7601-2090-40

Carbon steel (Q235B) with anti-corrosion coating; thread type NPT 2"×1.5"; pressure-resistant ≥ 35 MPa; welded structure

1. Weld fatigue cracking due to long-term pipeline vibration; 2. Corrosion of the thread due to mud leakage

1. Install vibration dampers at both ends of the adapter; 2. Apply thread sealant during installation and check for leakage regularly