SWC350H-1140 Cardan Shaft, FKQ1440-14D BOP Control Kit, ZJ50 Positive Carriage

Introduction

This document focuses on the full range of high-performance oil drilling equipment parts, including key components such as SWC350H-1140 cardan shaft, FKQ1440-14D Surface BOP Control Kit Repair Kit, ZJ50 positive carriage cardan shaft JQL300F550, ZJ250 pneumatic solenoid valve MSFG-24DC/42-50/60, and G8110-A05A volute lining. We specialize in providing precision-machined, industry-compliant parts that perfectly match ZJ250, ZJ32L, ZJ40D, ZJ50, ZJ70, ZJ70D, DQ70, DQ70BSD drilling rigs, as well as mud pumps (F-1300), boilers (KDB-250FA), and other oilfield equipment. Our products are designed to solve common pain points in oil drilling operations—such as frequent component wear, unstable operation, and high maintenance costs—while ensuring operational safety, improving equipment efficiency, and reducing downtime.

Target users include oilfield drilling companies, drilling equipment maintenance teams, oil and gas exploration enterprises, and spare parts procurement departments. We deeply understand the细分 needs of these users: reliable parts with precise compatibility, long service life, easy installation and maintenance, and compliance with international oilfield safety standards (API 7K, API 16C, ISO 9001). Whether it is routine maintenance, emergency replacement, or equipment upgrading, our full range of parts can provide one-stop solutions to meet the diverse needs of on-site operations.

Core Purpose

The core purpose of our oil drilling equipment parts is to provide high-quality, compatible, and durable spare parts for oilfield drilling and production equipment, ensuring the stable, safe, and efficient operation of drilling rigs, mud pumps, BOP systems, hydraulic systems, and pneumatic systems. Each part is manufactured in strict accordance with the original equipment (OE) standards and technical parameters, with a dimensional accuracy of ±0.02mm and a service life that is 15%-25% longer than ordinary replacement parts. By optimizing material selection (such as NBR20, URETHANE, stainless steel, and P460 COMP) and precision processing technology, we effectively solve the problems of component failure, leakage, and low efficiency caused by harsh oilfield working conditions, helping users reduce maintenance costs by 20%-30% and improve equipment operation rate by more than 95%.

Product Overview

Key Product Categories & Compatibility

Our product portfolio covers all core components of oil drilling equipment, with strict compatibility with mainstream drilling rig models and equipment. The main categories include:

• Cardan Shafts: SWC350H-1140, ZJ50 positive carriage cardan shaft JQL300F550—compatible with ZJ50, ZJ70 drilling rigs, with a maximum torque capacity of 350kN·m and a working speed range of 0-1500r/min, ensuring stable power transmission in high-load drilling operations.

• BOP Control System Parts: Surface BOP Control Kit Repair Kit FKQ1440-14D, air source treatment components FKQ1280-7AC4010-04—compliant with API 16C standards, suitable for surface blowout preventer systems, with a working pressure of 14MPa, ensuring rapid and reliable control of BOP operations in emergency situations.

• Valves & Solenoids: ZJ250 pneumatic solenoid valve MSFG-24DC/42-50/60, ZJ70D manual reversing valve 3WMM 10A10, ZJ70 pneumatic reversing valve K23R5-L8-(103), DQ70BSD C-Type explosion-proof solenoid valve 5126000670, ZJ70D two position three way valve DN12—all with IP65 protection level, suitable for harsh oilfield environments, with response time ≤0.05s and service life ≥1 million cycles.

• Liners & Seals: G8110-A05A volute lining, Y001-130150 ceramic cylinder liner, ZJ32L PSZ75B O-type sealing ring (Φ11×1.9), DQ70 O-ring 2.4.51.013, SEALS WASHER (Part Number: 7001050209)—made of high-wear-resistant and high-temperature-resistant materials, with a hardness of 60-70 HRC, effectively preventing leakage and extending equipment service life.

• Mechanical Components: ZJ50 brake pads BQ-22, W36-07-909 friction disc, ZJ-70 brake device, J39JS072202000 clutch spline sleeve, 2 44.45mm RS140V-2 rig chain—with high tensile strength (≥1200MPa) and wear resistance, suitable for high-load and high-frequency operation scenarios.

• Sensors & Instruments: 39585148 temperature sensor, ZNS medium pressure mud cup (stainless steel), 3800200005 pressure gauge—with measurement accuracy of ±1%, suitable for real-time monitoring of equipment operating parameters, ensuring safe operation.

• Other Accessories: 4807101510 capsule (6L*7/8-14UNF/VG5 NBR20/P460 COMP), IA484/278352N foot valve, 155-93C2-L0 DC24V 10A small relay, 01174418 filter element (for CMD-3A-111 hydraulic motor), 3827643 filter element, 3S6272/6530 belt—covering all supporting needs of drilling equipment, with 100% compatibility with OE parts.

Function Description

Core Functions of Key Components

Each part is independently designed to meet specific functional requirements of oil drilling equipment, ensuring the overall operation efficiency and safety of the equipment:

• Cardan Shafts: Transmit power between the drilling rig's prime mover and the working mechanism, compensate for the offset and angle deviation between the two shafts, and ensure stable power transmission under high load and high speed. The SWC350H-1140 cardan shaft adopts a cross-shaft structure, with self-lubricating bearings, reducing maintenance frequency.

• BOP Control Kit Repair Kit: Repair and maintain the surface BOP control system, ensuring that the BOP can be quickly activated to seal the wellbore in case of well kick or blowout, preventing safety accidents. The FKQ1440-14D kit includes all necessary seals, valves, and accessories, enabling on-site rapid repair.

• Pneumatic & Hydraulic Valves: Control the flow direction, pressure, and flow rate of gas and hydraulic oil in the drilling equipment system, ensuring the accurate operation of each executive component (such as cylinders, motors). The explosion-proof solenoid valve DQ70BSD 5126000670 is designed for explosive oilfield environments, with explosion-proof grade Exd II BT4, ensuring safe operation.

• Liners & Seals: Prevent leakage of oil, gas, and mud in the equipment, protect the internal components of the equipment from wear and corrosion, and extend the service life of the equipment. The ceramic cylinder liner Y001-130150 has excellent wear resistance, with a service life 3 times that of ordinary steel liners.

• Brake Devices & Friction Parts: Provide reliable braking force for the drilling rig's drum, carriage, and other components, ensuring safe operation during drilling, hoisting, and lowering operations. The ZJ50 brake pads BQ-22 have a friction coefficient of 0.45-0.55, ensuring stable braking performance even in high-temperature environments (≤200℃).

• Sensors & Instruments: Real-time monitor the operating parameters of the equipment (such as temperature, pressure, and mud density), provide data support for the operator to adjust the drilling parameters, and avoid equipment failure caused by abnormal parameters.

Structural Features

Design Advantages & Technical Specifications

Our products adopt advanced structural design and high-quality materials, combined with strict quality control processes, to ensure excellent performance and reliability. The main structural features are as follows:

• High-Strength Material Selection: Key components such as cardan shafts and rig chains are made of 40CrNiMoA alloy steel,经过 quenching and tempering treatment, with a tensile strength of ≥1080MPa and a yield strength of ≥930MPa, ensuring resistance to impact and fatigue under high load.

• Precision Machining: All parts are processed by CNC machine tools, with a dimensional tolerance of ±0.02mm, ensuring precise fit with the original equipment. The surface of the components is treated with galvanizing, chrome plating, or spray painting, with a corrosion resistance grade of ≥C5, suitable for harsh oilfield environments (high temperature, high humidity, and corrosive gas).

• Sealing & Wear-Resistant Design: Seals and liners adopt special materials (NBR20, URETHANE, ceramic) and structural design, with excellent sealing performance and wear resistance. The O-type sealing ring adopts a double-lip structure, which can effectively prevent leakage even under high pressure (≤35MPa).

• Easy Installation & Maintenance: The structural design of the parts is optimized to be consistent with the original equipment, enabling direct replacement without modifying the equipment. Key components (such as solenoid valves and filter elements) are designed with quick-disconnect structures, reducing maintenance time by 40%.

• Safety & Reliability: Explosion-proof components (such as DQ70BSD solenoid valve) comply with ATEX and IECEx standards, with explosion-proof grade Exd II BT4, suitable for Zone 1 and Zone 2 explosive environments. Brake devices and BOP control parts comply with API 7K and API 16C standards, ensuring safe operation.

Applicable Working Conditions

Our oil drilling equipment parts are designed to adapt to various harsh oilfield working conditions, covering onshore and offshore drilling operations, and can meet the following working environment requirements:

• Temperature Range: -40℃ to +120℃, suitable for cold regions (such as northern oilfields) and high-temperature desert regions.

• Pressure Range: 0-140MPa, applicable to high-pressure drilling operations (such as deep well and ultra-deep well drilling).

• Environmental Conditions: Resistant to humidity (relative humidity ≤95%), salt spray (corrosion resistance grade ≥C5), and dust (IP65 protection level), suitable for offshore, coastal, and desert oilfields.

• Load Conditions: Can withstand high load, high impact, and high-frequency cyclic operation, suitable for long-term continuous drilling operations (24 hours a day, 7 days a week).

• Specific Application Scenarios: Deep well drilling, ultra-deep well drilling, horizontal drilling, shale gas exploration, offshore drilling, and other oil and gas exploration and development scenarios. The parts are compatible with ZJ250-ZJ70 series drilling rigs, F-1300 mud pumps, KDB-250FA boilers, and other equipment, meeting the diverse needs of different drilling operations.

Maintenance & Care Recommendations

Proper maintenance and care can effectively extend the service life of the parts, reduce maintenance costs, and ensure the stable operation of the equipment. The following are detailed maintenance recommendations:

• Regular Inspection: Conduct a comprehensive inspection of the parts every 500 working hours, focusing on checking the wear, deformation, and leakage of components such as cardan shafts, seals, brake pads, and filter elements. Replace worn parts in a timely manner (such as brake pads with a wear thickness of more than 3mm, filter elements with a pressure difference of more than 0.5MPa).

• Lubrication Maintenance: Apply lubricating oil (recommended model: ISO VG46 hydraulic oil) to the cardan shaft bearings, clutch spline sleeves, and other moving parts every 200 working hours, ensuring sufficient lubrication and reducing friction wear. Avoid mixing different types of lubricating oil.

• Cleaning Maintenance: Regularly clean the surface of the parts, especially the filter elements, volute linings, and mud cups, to remove dirt, mud, and other impurities, preventing blockage and affecting the performance of the parts. Use neutral cleaning agents to avoid corrosion of the parts.

• Storage Requirements: Store the spare parts in a dry, ventilated, and clean warehouse, avoiding direct sunlight, rain, and corrosion. The storage temperature should be between -10℃ and +40℃, and the relative humidity should be ≤75%. Seal the parts with plastic film to prevent dust and moisture.

• Installation Notes: When installing the parts, ensure that the installation position is correct, the fasteners are tightened (torque meets the OE standard), and the seals are installed properly (avoiding deformation and damage). After installation, conduct a test run to check whether the parts operate normally.

We supply the following spare parts:

On-Site Fault Repair Cases

The following are 3 real on-site fault repair cases, which can provide reference for users to solve similar technical problems and verify the reliability of our products:

Case 1: Cardan Shaft Vibration Fault of ZJ50 Drilling Rig

Fault Phenomenon: During the drilling operation of a ZJ50 drilling rig, the SWC350H-1140 cardan shaft vibrated violently, accompanied by abnormal noise, and the drilling speed decreased. Fault Cause: The cross-shaft bearing of the original cardan shaft was worn (wear amount ≥0.1mm), and the shaft diameter was deformed, leading to unstable power transmission. Repair Solution: Replace the original cardan shaft with our SWC350H-1140 cardan shaft (compatible with ZJ50 drilling rig), and check and adjust the alignment of the two shafts. Effect After Repair: The vibration of the cardan shaft was eliminated, the abnormal noise disappeared, the drilling speed returned to normal, and the service life of the cardan shaft was extended by more than 20% compared with the original part.

Case 2: Leakage Fault of FKQ1440-14D BOP Control System

Fault Phenomenon: During the well control operation of a surface BOP system, the FKQ1440-14D control kit had hydraulic oil leakage, resulting in insufficient system pressure and failure to activate the BOP. Fault Cause: The seals in the original control kit were aged and damaged, and the valve core was worn, leading to oil leakage. Repair Solution: Use our FKQ1440-14D BOP Control Kit Repair Kit to replace the aged seals, valve core, and other components, and conduct pressure test (test pressure: 14MPa) after repair. Effect After Repair: The hydraulic oil leakage was completely eliminated, the system pressure was stable, the BOP could be activated normally, and the on-site well control safety was guaranteed.

Case 3: Solenoid Valve Failure of ZJ250 Drilling Rig Hydraulic System

Fault Phenomenon: The ZJ250 drilling rig's MSFG-24DC/42-50/60 pneumatic solenoid valve failed to respond, leading to the inability to control the hydraulic cylinder of the drilling rig. Fault Cause: The coil of the original solenoid valve was burned out, and the valve core was stuck due to impurity accumulation. Repair Solution: Replace the original solenoid valve with our ZJ250 MSFG-24DC/42-50/60 pneumatic solenoid valve, clean the hydraulic pipeline, and install a filter to prevent impurities from entering. Effect After Repair: The solenoid valve responded normally, the hydraulic cylinder operated stably, and the failure rate of the hydraulic system was reduced by 30%.

FAQ (Frequently Asked Questions)

Procurement Guide & Value Commitment

We are committed to providing high-quality, compatible, and cost-effective oil drilling equipment parts for global oilfield users. All our products have passed ISO 9001 quality management system certification, API 7K, API 16C product certification, and have passed strict quality inspection (including dimensional inspection, material inspection, performance test, and fatigue test) before leaving the factory, with a qualified rate of 100%.

Whether you need routine spare parts replacement, emergency repair parts, or batch procurement, we can provide flexible procurement solutions to meet your needs. Our product range covers all the parts listed in this document, including SWC350H-1140 cardan shaft, 4807101510 capsule, FKQ1440-14D BOP control kit, ZJ50 JQL300F550 cardan shaft, and other key components. We provide detailed product technical parameters, compatibility lists, and maintenance manuals to help you make accurate procurement decisions and solve technical problems in the operation process.

Choose our oil drilling equipment parts, you can get reliable product quality, precise compatibility, professional technical support, and competitive prices. We look forward to cooperating with you to provide strong support for your oilfield drilling operations, reduce maintenance costs, and improve operational efficiency. Please contact us to discuss your specific procurement needs and get a customized quotation.

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