Spinner Lines & Matching Parts for ZJ40 Truck-mounted Drilling Rig

1

Spinner lines

Z08180000001AA

High-pressure seamless steel pipe, outer anti-corrosion epoxy coating, inner wall polished, tensile strength ≥ 830MPa, pressure-bearing capacity ≤ 25MPa, compliant with API Spec 7K and ISO 4394-1

1. Coating damage and pipe wall corrosion caused by contact with drilling fluid; 2. Fatigue cracking from long-term high-frequency vibration during drilling; 3. Pipe deformation and wear from collision with drilling tools.

1. Clean the line surface promptly after contact with drilling fluid and reapply anti-corrosion paint if needed; 2. Avoid collision with drilling tools by installing protective sleeves; 3. Conduct monthly inspections for deformation or leakage.

1

Hose assembly 6

Z08330100025AA

Inner layer: NBR nitrile rubber (oil-resistant), middle layer: 4-layer high-strength steel wire (reinforcement), outer layer: CR chloroprene rubber (wear-resistant), rated pressure 15MPa, compliant with ISO 6803

1. Steel wire layer damage from over-bending (less than minimum radius); 2. Outer layer wear from friction with equipment components; 3. Rubber aging and cracking from long-term exposure to sunlight and high temperature.

1. Ensure installation bending radius ≥ 60mm (6mm hose); 2. Install protective sleeves at friction points; 3. Avoid direct exposure to sunlight and high-temperature areas on the rig.

2

Copper pipe assembly 10

Z08361100001AA

TP2 deoxidized copper, wall thickness 1.2mm, tensile strength ≥ 205MPa, bending strength ≥ 100MPa, compliant with GB/T 18033-2007

1. Pipe cracking from improper bending during installation; 2. Inner wall oxidation and blockage from moist hydraulic fluid; 3. Surface corrosion from humid drilling site environments.

1. Use professional bending tools, ensure bending radius ≥ 100mm (10mm pipe); 2. Regularly drain moisture from the hydraulic system; 3. Apply anti-corrosion coating to the pipe surface annually.

3

Copper pipe assembly 48

Z08361000001AA

TP2 deoxidized copper, wall thickness 1.8mm, tensile strength ≥ 205MPa, pressure-bearing capacity ≤ 20MPa, compliant with GB/T 18033-2007

1. Pipe deformation from excessive hydraulic pressure; 2. Welding joint cracking from long-term vibration; 3. Surface scratches and corrosion from improper maintenance.

1. Ensure system pressure does not exceed the pipe’s rated capacity; 2. Inspect welding joints monthly for cracks; 3. Avoid scratching the pipe surface during maintenance operations.

1

M33X2-Rc1 1/2" fitting

P1300067AA

Carbon steel AISI 1045, surface zinc plating, thread pitch 2.0mm, compliant with ISO 965-1 and BSPT (Rc) standards

1. Thread wear and sliding from over-tightening during installation; 2. Zinc layer damage and corrosion from drilling fluid; 3. Seal surface damage from dirt, leading to leakage.

1. Use a torque wrench to tighten to standard torque (25-30 N·m); 2. Clean the fitting surface after contact with drilling fluid; 3. Remove dirt from the seal surface before installation.

2

M14X1.5-NPT3/8" fitting

QBJ5071403

Carbon steel AISI 1045, surface zinc plating, thread pitch 1.5mm, compliant with ISO 965-1 and NPT standards

1. Stress concentration at the thread root from long-term vibration; 2. Thread corrosion and jamming in humid environments; 3. Damage from improper tool use during disassembly.

1. Install vibration-damping gaskets near the fitting; 2. Apply anti-rust oil to threads monthly; 3. Use matching wrenches to avoid damaging the fitting body.

3

Rc1"-R1 1/2" bushing

P0900020AA

Stainless steel 304, passivated surface, thread compliant with BSPT (Rc/R) standards, precision machining for size conversion

1. Thread wear from improper size matching during installation; 2. Corrosion in chemical drilling fluid environments; 3. Damage from brute force during assembly.

1. Confirm size compatibility before installation; 2. Avoid contact with chemical drilling fluid; 3. Use professional tools for assembly and disassembly.

4

M10X1-NPT1/8" fitting

QBJ5201001

Carbon steel AISI 1045, surface zinc plating, thread pitch 1.0mm, compliant with ISO 965-1 and NPT standards

1. Air or hydraulic fluid leakage from seal ring aging; 2. Thread wear from frequent disassembly; 3. Deformation from external impact.

1. Replace the seal ring every 6 months; 2. Minimize frequent disassembly; 3. Install a protective cover to prevent impact damage.

5

M18X1.5-NPT3/8" fitting

QBJ5011803

Carbon steel AISI 1045, surface zinc plating, thread pitch 1.5mm, compliant with ISO 965-1 and NPT standards

1. Thread sliding from using mismatched tools; 2. Corrosion of the zinc layer from outdoor humidity; 3. Seal failure from dirt contamination.

1. Use only matching wrenches; 2. Clean and apply anti-rust oil regularly; 3. Clean the seal surface thoroughly before installation.

6

NPT3/8”-NPT3/8”fitting

QBJ5230303

Carbon steel AISI 1045, surface zinc plating, thread compliant with NPT standards, straight type for same-size connection

1. Fatigue cracking from long-term high-pressure pulse; 2. Thread wear from over-tightening; 3. Corrosion from drilling site dust and moisture.

1. Tighten to standard torque (15-18 N·m); 2. Conduct quarterly pressure tests to check for hidden damage; 3. Clean the fitting surface regularly.

7

M39X2-NPT1”fitting

QBJ5013908

Carbon steel AISI 1045, surface zinc plating, thread pitch 2.0mm, compliant with ISO 965-1 and NPT standards

1. Deformation from uneven stress during installation; 2. Thread wear from improper disassembly; 3. Corrosion from long-term exposure to drilling fluid.

1. Ensure even stress during installation; 2. Avoid brute force during disassembly; 3. Clean and dry the fitting after contact with drilling fluid.

8

M33X2-NPT1”bushing

QBJ10063308

Stainless steel 304, passivated surface, thread pitch 2.0mm, compliant with ISO 965-1 and NPT standards

1. Thread wear from size mismatch; 2. Corrosion in humid environments; 3. Damage from improper tool use.

1. Verify size matching before installation; 2. Apply anti-corrosion sealant to threads; 3. Use professional tools to avoid thread damage.

9

NPT1/8"-NPT3/8" bushing

QBJ10010301

Stainless steel 304, passivated surface, thread compliant with NPT standards, designed for size conversion between small-diameter pipelines

1. Thread wear from frequent disassembly; 2. Corrosion from chemical contaminants; 3. Deformation from excessive force.

1. Minimize frequent disassembly; 2. Avoid contact with chemical contaminants; 3. Do not exceed the recommended tightening torque.

1

Combined sealing washer 33

5300300009

NBR nitrile rubber + carbon steel, shore hardness 70±5, oil-resistant, high-temperature resistant (≤120℃), compliant with GB/T 5720-2008

1. Aging and hardening from long-term immersion in hydraulic oil; 2. Damage from uneven compression during installation; 3. Cracking from high temperature near the spinner.

1. Replace annually or when hardening is observed; 2. Use a torque wrench to ensure even compression; 3. Avoid installation near high-temperature spinner components.

2

Sealing washer 10

5300300001

NBR nitrile rubber, shore hardness 70±5, oil-resistant, pressure-resistant (≤25MPa), compliant with GB/T 5720-2008

1. Damage from dirt on the seal surface; 2. Aging from long-term use; 3. Deformation from over-tightening of fittings.

1. Clean the seal surface before installation; 2. Replace every 6 months during routine maintenance; 3. Tighten fittings to standard torque to avoid over-compression.

1

2 position 3 way valve

4900300033

Valve body: Carbon steel AISI 1045, spool: Stainless steel 304, seal: NBR nitrile rubber, pressure-bearing capacity ≤ 25MPa, compliant with ISO 4401

1. Valve jamming from impurities in hydraulic fluid; 2. Internal seal leakage from wear; 3. Valve body corrosion from drilling fluid contamination.

1. Install a precision filter to remove impurities from hydraulic fluid; 2. Clean the valve regularly and replace internal seals annually; 3. Avoid contact with drilling fluid.

2

NPT3/8" tee

QBJ806030303

Carbon steel AISI 1045, surface zinc plating, thread compliant with NPT standards, three-way structure for fluid distribution

1. Connection leakage from thread wear; 2. Zinc layer damage and corrosion; 3. Cracking from uneven stress during installation.

1. Tighten all connections to standard torque; 2. Clean and apply anti-rust oil regularly; 3. Ensure even stress distribution during installation.

3

Shuttle valve

4900350110

Valve body: Stainless steel 304, spool: Stainless steel 316, seal: NBR nitrile rubber, pressure-bearing capacity ≤ 25MPa, compliant with ISO 4401

1. Spool jamming from dirt or debris; 2. Seal leakage from wear; 3. Corrosion in humid or chemical environments.

1. Regularly clean the valve to remove dirt and debris; 2. Replace seals every 6 months; 3. Apply anti-corrosion coating to the valve body in harsh environments.

1

U type bolt

P5000052AA

Alloy steel 8.8 grade, surface zinc plating, tensile strength ≥ 830MPa, compliant with ISO 898-1

1. Fatigue fracture from long-term high-frequency vibration; 2. Thread wear from over-tightening; 3. Corrosion of the zinc layer leading to rust and difficulty in disassembly.

1. Tighten to standard torque and re-tighten monthly; 2. Clean and apply anti-rust oil regularly; 3. Use matching nuts and washers to distribute stress.

2

Spring washer 8

4313100008

65Mn spring steel, surface galvanized, hardness HRC 42-48, compliant with GB/T 93-1987

1. Fatigue loss of elasticity from long-term compression; 2. Corrosion causing fracture; 3. Deformation from incorrect installation direction.

1. Replace together with bolts and nuts during maintenance; 2. Do not reuse deformed or rusted washers; 3. Ensure the curved surface faces the nut during installation.

3

Nut M8

4309300008

Carbon steel 45#, surface zinc plating, thread compliant with ISO 262, hardness HRC 28-32

1. Thread wear from frequent disassembly; 2. Corrosion leading to thread jamming; 3. Deformation from over-tightening.

1. Avoid violent disassembly and assembly; 2. Store in a dry environment when not in use; 3. Replace if thread sliding or deformation occurs.

1

Support

P7100086AA

Low-carbon steel Q235B, surface powder coating, thickness 10mm, load-bearing capacity ≥ 500N, compliant with GB/T 700-2006

1. Deformation from uneven stress during installation; 2. Coating wear and corrosion from dust and drilling fluid; 3. Welding joint cracking from long-term vibration.

1. Ensure the installation surface is flat and fasteners are evenly tightened; 2. Clean the support surface regularly and reapply paint if the coating peels; 3. Inspect welding joints monthly for cracks.

What causes the ZJ40’s spinner to jam, and how to solve it quickly on-site?

Common causes include: 1. Valve jamming from hydraulic fluid impurities; 2. Hydraulic leakage and pressure loss from worn fittings/sealing washers; 3. Line blockage. On-site solution: Clean or replace the jammed valve, replace worn fittings and washers, flush the spinner line system to remove impurities, and conduct a pressure test to confirm normal operation.

How often should the spinner lines (Z08180000001AA) and matching parts be inspected and replaced?

Conduct weekly inspections for leakage, deformation, and loosening. Monthly maintenance: Clean parts and apply anti-rust oil. Replace spinner lines every 2-3 years, hose/copper pipe assemblies every 3-4 years, sealing washers every 6-12 months, and valves every 3 years—even if no obvious damage is found, to avoid sudden failure.

Can non-original fittings and fasteners be used for the spinner line system?

No, it is not recommended. Original parts (e.g., P1300067AA, P5000052AA) are precision-manufactured to match the ZJ40’s spinner system, complying with API Spec 7K standards. Non-original parts may have improper size or insufficient strength, leading to leakage, component damage, and safety hazards. Always use original parts for replacement and procurement.