ZJ30C, ZJ50, ZJ50DB, ZJ70D, DQ70, Boiler EO-154 Supply

Introduction

We focus on the production and supply of high-precision, durable spare parts for oil drilling rigs, industrial boilers, winches, turntables, inclinometers, BOP (Blowout Preventer) systems, and supporting hydraulic, pneumatic, electrical, and transmission equipment. Our product range fully covers core equipment models including ZJ30C, ZJ50, ZJ50DB, ZJ50D28, ZJ70D, DQ70, DQ70BS, Boiler EO-154, GE-MWD Inclinometer, Double Ram BOP, and Triple Cylinder Plunger Pump. Key components we supply include hex head screw BKD-11-S8, Boiler EO-154 solenoid valve DF-40, ZJ70D ZP375 turntable bushing (9 5/8″-10 3/4″), 12-1/4″ HJ537G inserted carbide roller bit, and ZJ30C hydraulic station filter element ZU-H250*20FS. All products are manufactured in strict compliance with API 7K, API 16A, ISO 9001, and GB/T 30582 standards, with a factory inspection pass rate of 99.9%, material qualification rate of 100%, and dimensional accuracy error ≤±0.01mm. This ensures perfect compatibility with original equipment and effectively solves the pain points of unstable operation, short service life, poor replacement adaptability, and high maintenance costs that users often face when using inferior spare parts in harsh oilfield and industrial environments.

Targeted at oil drilling companies, oilfield exploration and maintenance teams, boiler operation enterprises, BOP system operators, inclinometer users, and industrial equipment repair service providers, we accurately match the segmented needs of different users: For drilling rig operation teams, we provide high-load, wear-resistant core components (such as ZJ70D ZP375 turntable bushings, ZJ50 winch drive shafts, 12-1/4″ HJ537G carbide roller bits, and DQ70 clamp holders) to ensure safe, efficient drilling operations and reduce non-productive downtime; for boiler operators, we supply high-safety, stable-performance accessories (Boiler EO-154 DF-40 solenoid valves) to maintain stable boiler operation and meet industrial production safety standards; for BOP and inclinometer users, we offer precision parts (Double Ram BOP 3in XWSY480 ram shaft sealing rings, GE-MWD inclinometer thread buckle rings) to ensure reliable equipment operation and accurate downhole measurement; for maintenance teams, we provide filter elements (ZU-H250*20FS, 1R0751), gaskets, and easy-to-install fasteners (hex head screws BKD-11-S8, stud bolts X20-01-002) to simplify maintenance processes and reduce labor costs. The core purpose of our products is to provide cost-effective, reliable spare parts solutions, helping users reduce operational risks, improve equipment utilization, and lower overall operational costs.

Product Overview

Core Product Categories & Key Models

Our product portfolio covers 20 major categories and more than 120 core models, fully meeting the maintenance, replacement, and upgrade needs of oil drilling rigs, boilers, winches, turntables, BOP systems, inclinometers, and supporting equipment. Each part is strictly matched to the corresponding equipment model to ensure seamless replacement, stable performance, and direct compatibility with original systems:

• Fasteners & Structural Parts: Hex head screw BKD-11-S8, stud bolt X20-01-002, countersunk head bolt PSZ75-1-04, bolt T503-3007, screw 4400200457

• Boiler Parts: Boiler EO-154 solenoid valve DF-40

• Electrical & Control Parts: Rotary switch CR104PSM21, rectifier diode MP03X360-08 (80mA 600V 720V), control circuit board GFB power amplifier board 5J475, SPMlink 3P100025

• Drilling Rig & Turntable Parts: Turntable ZJ70D ZP375, turntable bushing (9 5/8″-10 3/4″), connecting beam JJ746609-120200, guide pulley Z05020202023AA

• Winch & Brake Parts: Winch brake operating mechanism ZJ50DB SY, disc brake parking brake valve 7678M0FH, winch drive shaft ZJ-50, relay valve MNR R900375749 /LT, winch brake operating mechanism ZJ50D28, driller valve assembly LT07MKA-2X/100/02M

• Drill Bits: Inserted Carbide Roller Bit 12-1/4″ HJ537G

• Sealing & Wear Parts: SEAL OIL PD220 X 260 X 18, ram shaft sealing ring 3in XWSY480 (Double Ram BOP), oil deflector ring ZLYQC850-94A-311, back pad DQ70 Φ39 4.10.08.001, spindle adjustment pad DQ70 9702020355 0.15mm, BK-3-7B2 bushing, volute bushing CH1110A05

• Pipes & Assemblies: Spray pipe assembly AH080101050300, flushing assembly DQ70BS Φ95×250 35MPa, clamp assembly AH130101051900

• Hydraulic & Pneumatic Parts: Lifting hydraulic device ZJ30C, hydraulic station filter element ZU-H250*20FS, handle reversing valve 512704300600130017, shuttle valve ZJ70D ND5512704110600060000, valve group1 ZJ50 BK-T-1

• Pump Parts: Triple cylinder plunger pump pump head QB-21.80, pump impeller ring SA310462

• Bearings & Bushings: Whole vehicle thrust bearing, whole car copper pad copper sleeve 6883707, bearing NU1028M

• Valves: Intake valve 1632442, IA285 (P-051612-00001) sand fishing combined pressure regulating valve

• Filters & Air Treatment: Air filter P777868, filter element 1R0751, filter assembly AH1001011900B1, pad 6E4225

• Mechanical & Engine Parts: LMD piston cap 981148, front axle brake chamber 5000200003, air motor 7C3372, ventilator FDW Special T4-72-11, breathing valve 226469 (6881462)

• Inclinometer & MWD Parts: Inclinometer GE-MWD thread buckle ring 981824

• Brake & Clutch Parts: Brake device ZJ-30, pneumatic tire clutch assembly F1000.T014-06.00

• Cylinder Liners: Ceramic cylinder liner Y001-100170

• Gauges: A144276 oil temperature gauge

• Clamp Parts: Clamp holder DQ70 5″ 1.03.09.003

• Springs: 23042184 spring 23018423

Function Description

Each product is independently designed and manufactured according to the functional requirements of the matching equipment, with clear positioning, reliable performance, and precise matching. They effectively solve the core pain points of equipment operation and ensure the stable and efficient operation of the entire equipment system:

• Drill Bits & Drilling Parts: The 12-1/4″ HJ537G inserted carbide roller bit is made of high-hardness carbide, suitable for drilling in medium to hard rock formations, with a drilling speed of 10-16m/h and service life of more than 550 drilling meters, ensuring efficient and stable drilling operations.

• Boiler & Electrical Parts: The Boiler EO-154 DF-40 solenoid valve has a rated voltage of 220V, response time of ≤0.12 seconds, and pressure resistance of 1.6MPa, ensuring precise control of boiler fluid flow and stable boiler operation; the CR104PSM21 rotary switch has a service life of more than 10,000 operations, ensuring reliable electrical control for drilling rig systems.

• Turntable & Winch Parts: The ZJ70D ZP375 turntable bushing (9 5/8″-10 3/4″) has an inner diameter tolerance of ±0.02mm, wear resistance of more than 8000 working hours, ensuring stable rotation of the ZJ70D turntable; the ZJ50DB 7678M0FH disc brake parking brake valve has a pressure resistance of 31.5MPa, ensuring reliable parking brake of the winch.

• BOP & Sealing Parts: The Double Ram BOP 3in XWSY480 ram shaft sealing ring is made of high-temperature resistant fluorine rubber, pressure resistance of 70MPa, high temperature resistance up to 180℃, ensuring tight sealing of the BOP and preventing well fluid leakage; the PD220×260×18 oil seal has a pressure resistance of 25MPa, oil resistance, and good sealing performance for rotating shafts.

• Hydraulic & Filter Parts: The ZJ30C ZU-H250*20FS hydraulic station filter element has a filtration precision of 20μm, filtering efficiency up to 99.8%, effectively removing impurities in hydraulic oil and protecting the ZJ30C lifting hydraulic device; the 1R0751 filter element has a filtration precision of 2μm, suitable for diesel and hydraulic oil filtration.

• Inclinometer & Clutch Parts: The GE-MWD 981824 thread buckle ring ensures tight connection of the inclinometer, preventing disengagement during downhole operation; the ZJ-30 F1000.T014-06.00 pneumatic tire clutch assembly has a maximum transmission torque of 3800N·m, ensuring smooth clutch engagement and disengagement for the ZJ-30 brake device.

Structural Features

All products adopt scientific and reasonable structural design, combining durability, ease of use, and cost-effectiveness, with outstanding structural features to adapt to harsh industrial working conditions:

1. High-Quality Material Selection: Carbide drill bits, turntable bushings, and bearings are made of high-chromium alloy, carbide, and high-precision bearing steel; structural parts (connecting beams, guide pulleys, fasteners) are made of 35CrMo, 40Cr, and other high-quality alloy steels, after quenching, tempering, and other heat treatment processes, with a hardness of HRC 35-48, tensile strength ≥850MPa, and impact toughness ≥65J/cm², ensuring long-term use under high load and harsh conditions.

2. Precision Manufacturing: Adopt CNC machining, precision grinding, and diamond polishing technologies, with a machining accuracy of ±0.01mm, ensuring that the size, shape, and position tolerance of each part are completely consistent with the original equipment, enabling seamless replacement without additional modification or adjustment.

3. Sealing & Corrosion Resistance: Sealing parts (oil seals, ram shaft sealing rings, O-rings) adopt nitrile rubber (NBR), fluorine rubber (FKM), and high-temperature resistant materials, with high temperature resistance up to 200℃, oil resistance, and corrosion resistance; the surface of metal parts is treated with galvanizing, electrophoresis, or spray painting, with a corrosion resistance grade of C5-M, adapting to humid, salty, and dusty oilfield and industrial environments.

4. Easy Installation & Disassembly: The structural design is optimized according to the original equipment, and the connection method is consistent with the original parts, without the need for special tools. The installation and disassembly time can be reduced by 45%, improving maintenance efficiency.

5. Modular & Universal Design: For core components such as filter elements, sealing rings, and fasteners, a modular design is adopted, which is convenient for partial replacement and maintenance, reducing maintenance costs; some universal parts (such as bolts, gaskets, and diodes) can be used for multiple equipment models, improving product versatility and reducing user inventory pressure.

Application Working Conditions

Our products are widely used in oil drilling, oilfield exploration and development, boiler operation, BOP system operation, inclinometer downhole measurement, winch operation, and other fields, and can stably adapt to various harsh working conditions, fully meeting the actual operation needs of users and ensuring stable equipment operation:

• Oil Drilling Rigs (ZJ30C, ZJ50, ZJ50DB, ZJ50D28, ZJ70D, DQ70, DQ70BS): Suitable for onshore and offshore drilling operations, able to withstand high temperature (-40℃ ~ 150℃), high pressure (up to 70MPa for BOP parts), strong vibration (vibration frequency 10-50Hz), and dusty, salty, and humid environments.

• Industrial Boilers (EO-154): Applicable to industrial steam production, able to adapt to high temperature (up to 1200℃ for flue gas), high humidity, long-term continuous operation, and corrosive flue gas environments, ensuring the safety and stability of boiler operation.

• BOP Systems (Double Ram BOP) & Winches: Suitable for oilfield well control and hoisting operations, able to adapt to high pressure (up to 70MPa), flammable and explosive environments, ensuring reliable operation of BOP systems and winches.

• Inclinometers (GE-MWD) & Electrical Systems: Inclinometer parts are suitable for downhole measurement in oil and gas wells, able to adapt to high temperature (up to 120℃) and high pressure (up to 20MPa); electrical parts and control boards are suitable for flammable and explosive oilfield electrical systems, ensuring stable power transmission and control.

• Other Fields: Hydraulic filters, shuttle valves, and pressure regulating valves are suitable for various oilfield hydraulic systems; air filters and ventilators are suitable for engine and equipment cooling systems, adapting to harsh outdoor and industrial working conditions.

Maintenance & Care Suggestions

To extend the service life of the products, reduce equipment failure rate, and ensure the stable operation of the entire equipment system, we provide practical, easy-to-operate maintenance and care suggestions, helping users reduce maintenance costs and improve equipment utilization:

1. Regular Inspection: For drill bits, turntable bushings, brake components, hydraulic valves, sealing parts, and electrical modules, conduct a comprehensive inspection every 100 working hours, check for wear, cracks, deformation, and leakage, and replace them in time if any abnormality is found; for filter elements, solenoid valves, and bearings, check for wear and damage every 200 working hours.

2. Cleaning & Replacement: Clean the surface of hydraulic filters (ZU-H250*20FS) and diesel filters (1R0751) every 50 working hours, and replace the filter element every 500 working hours; clean the carbide roller bit, turntable bushing, and brake shoe assembly every 800 working hours to remove sediment and impurities, ensuring smooth operation.

3. Lubrication Maintenance: Apply No. 32 anti-wear hydraulic oil or special lubricating grease to transmission parts (winch drive shafts, turntable shafts, bearings) every 200 working hours, and apply grease to pins, connectors, and valve stems every 300 working hours to reduce friction and wear, extending the service life of the parts.

4. Storage Requirements: Unused spare parts should be stored in a dry, ventilated, and clean warehouse, avoiding direct sunlight, rain, and contact with corrosive substances; the storage temperature should be controlled between -10℃ and 40℃, and the relative humidity should not exceed 75%; for sealing parts and O-rings, store them in sealed packaging to avoid aging; for electrical parts and explosion-proof devices, keep them away from moisture and dust.

5. Installation & Fault Handling: When installing the parts, ensure that the connection is tight, and the torque meets the standard (refer to the original equipment manual); for hydraulic and pneumatic parts, check for air leakage before operation; for boiler and electrical parts, ensure correct wiring and grounding. If the parts fail during use, stop the equipment immediately, check the cause of the fault according to the maintenance manual, and do not force the equipment to operate to avoid secondary damage.

We supply the following spare parts:

On-Site Fault Maintenance Cases

We have accumulated rich on-site maintenance experience in long-term cooperation with oilfield, boiler, and industrial equipment enterprises. The following 3 real on-site fault maintenance cases provide practical reference for users to solve similar technical problems and ensure rapid equipment recovery:

Case 1: ZJ70D Turntable Bushing Wear Failure

Fault Phenomenon: During the operation of the ZJ70D drilling rig, the ZP375 turntable had abnormal noise and unstable rotation, resulting in reduced drilling efficiency and uneven drill string rotation.

Fault Cause: The 9 5/8″-10 3/4″ turntable bushing was severely worn (wear thickness exceeding 0.3mm) after 8500 working hours of use, leading to increased clearance between the turntable and bushing.

Maintenance Solution: Replace the turntable bushing with our ZJ70D ZP375 9 5/8″-10 3/4″ spare part, adjust the turntable clearance, and test the rotation performance. After replacement, the turntable operates smoothly without abnormal noise, and the drilling efficiency is restored.

Case 2: Double Ram BOP Sealing Failure

Fault Phenomenon: The Double Ram BOP’s 3in XWSY480 ram shaft sealing ring leaked during well control operations, resulting in well fluid leakage and potential safety risks.

Fault Cause: The sealing ring was damaged due to contact with corrosive well fluid and long-term high-pressure operation, leading to reduced sealing performance.

Maintenance Solution: Replace the ram shaft sealing ring with our 3in XWSY480 spare part, clean the ram shaft and sealing groove, and test the sealing performance. After replacement, there is no well fluid leakage, and the BOP operates normally to ensure well control safety.

Case 3: ZJ30C Hydraulic Station Filter Blockage

Fault Phenomenon: The ZJ30C lifting hydraulic device operated sluggishly, and the hydraulic station pressure was unstable (from 28MPa to 22MPa), which affected the lifting efficiency of the drilling rig.

Fault Cause: The ZU-H250*20FS hydraulic station filter element was blocked by impurities after 550 working hours of use, leading to poor oil circulation and insufficient hydraulic pressure.

Maintenance Solution: Replace the filter element with our ZJ30C ZU-H250*20FS spare part, clean the hydraulic pipeline, and test the hydraulic system pressure. After replacement, the hydraulic pressure is stable at 28MPa, and the lifting hydraulic device operates smoothly.

FAQ (Frequently Asked Questions)

Conclusion & Procurement Guide

We are committed to providing high-quality, reliable, and cost-effective spare parts for oil drilling rigs, industrial boilers, winches, turntables, BOP systems, inclinometers, and supporting equipment, covering core models such as ZJ30C, ZJ50, ZJ50DB, ZJ70D, DQ70, Boiler EO-154, and key parts such as 12-1/4″ HJ537G carbide roller bit, ZJ70D ZP375 turntable bushing, Boiler EO-154 DF-40 solenoid valve, and Double Ram BOP sealing ring. All products have passed strict quality inspection, with authoritative certification, stable performance, and perfect compatibility, which can effectively solve the pain points of frequent equipment failures, high maintenance costs, and poor replacement adaptability that users face.

Our products not only meet the procurement standards of users (such as material qualification, performance parameters, and compatibility), but also provide professional technical support and maintenance guidance, serving as a reliable partner for your equipment operation and maintenance. We adhere to the principle of "quality first, customer-oriented", and provide users with high-quality products and thoughtful services to help users reduce operational risks and improve economic benefits.

If you are in need of oil drilling rig spare parts, boiler accessories, BOP components, or other related products (such as ZJ30C hydraulic filter element, ZJ70D turntable bushing, 1R0751 filter element, BKD-11-S8 hex head screw, etc.), please contact us to learn more about product details, pricing, and supply solutions. We can provide customized product supply services according to your specific equipment models and usage needs, ensuring that you can obtain the most suitable spare parts to support the stable operation of your equipment.

contact us ：

Emeil: [email protected]   whatsapp: +86 15275658619

Should you have any purchase intentions, please contact us – we will offer you our most favorable price.