JC28 Series & JX240 Series Full Supporting Parts

1. Core Application Purpose & Target User Demand

This complete set of supporting parts dominated by JC28 series and JX240 series components is professionally customized for JC70DB1302 drilling connection equipment and JC70DB010100 base assembly systems, serving frontline oilfield drilling operation teams and industrial equipment maintenance departments. It precisely solves typical field pain points including telescoping cylinder jitter, brake system attenuation, hydraulic pipeline leakage, transmission structure looseness and hoisting device instability during long-cycle heavy-load drilling operations. All components comply with national GB industry standards and petroleum machinery manufacturing specifications, with product stability verified through 7800 hours of continuous field operation tests. The complete accessory portfolio fills the demand gap of standardized replacement and integrated maintenance for medium and large-scale automatic drilling equipment, providing authoritative technical guidance and unified procurement benchmarks for industrial users.

2. Product Overview

This product lineup covers full-range core accessories for drilling equipment, including JC28 series screws, bushings, shaft sleeves and connecting plates, JX240/JX240B series structural fittings, JJ18038 series guyline and hoisting assemblies, WCB324 auxiliary brake units and K187/II2GD reduction gearboxes. It is also equipped with YJ13C main motor matching parts, HG4-692-67 standard oil seals, 22338CC/W33 and 22248CC/W33 heavy-duty rolling bearings, one-way valves, roller shaft couplings and full specifications of GB standard fasteners. Every part adopts precision machining and integral forging technology, featuring high structural compatibility with JC70DB series drilling host equipment, realizing one-stop matching replacement for equipment overhaul and daily fault maintenance.

3. Core Functional Description

3.1 Stable Hoisting & Mechanical Transmission

Matched with JJ18036-19-00 hoisting devices, JJW036-18-00 balancing devices and K187 series reducers, the product maintains stable power transmission and load balance during drilling equipment operation. It effectively solves the problem of unbalanced load distribution and hoisting jitter caused by long-term vibration, ensuring continuous and stable operation of heavy-load mechanical structures.

3.2 Reliable Braking & Safety Protection

WCB324 auxiliary brake and JC28A braided brake blocks form a dual safety braking system, paired with JC21A-03-06 anti-collision crutch arms to achieve multi-dimensional equipment protection. It eliminates potential safety hazards such as slow braking response and insufficient braking friction in high-intensity drilling operations, improving overall equipment safety redundancy.

3.3 Sealing & Hydraulic System Stabilization

HG4-692-67 series oil seals and customized shaft sleeves provide high-strength sealing protection for hydraulic cylinders and pipeline structures. Cooperating with S25A01 one-way valves and 20711-64-24 hoses, it avoids hydraulic oil leakage and pipeline pressure loss, keeping the internal hydraulic system of drilling equipment at a constant stable working pressure.

4. Structural Characteristics

All parts adopt modular integrated structural design with unified assembly tolerance benchmarks, realizing high interchangeability and quick on-site disassembly. Custom JC28 and JX240 series core components adopt high-strength alloy forging process, with strong compression resistance and wear resistance. The optimized balancing device and guyline assembly structure effectively offset equipment operating torque, while double ear stop washers and precision bolts prevent structural loosening under long-term vibration. The matched bearing cover and buffer connection structure reduces equipment operating noise and mechanical impact, adapting to harsh continuous working conditions.

5. Applicable Working Conditions

This series of accessories is widely applicable to onshore oilfield automatic drilling, well repair and heavy-load hoisting working scenarios. It stably adapts to open-air environments with ambient temperatures ranging from -25℃ to 58℃, high dust and frequent vibration impact. It fully matches the full-load operation parameters of JC70DB series drilling equipment, and can maintain stable mechanical performance under long-term intermittent heavy-load and continuous cyclic operation conditions.

6. Professional Maintenance Suggestions (Engineer On-site Experience)

Based on years of oilfield equipment maintenance experience, oil seals and shaft sleeve accessories need comprehensive replacement every 10 months to avoid aging and leakage failure. Brake blocks and auxiliary brake components require wear inspection and gap calibration every 4 months. Rolling bearings need regular grease replenishment to reduce friction loss. It is not recommended to operate equipment with mismatched fasteners, which will cause irreversible structural fatigue. Scientific standardized maintenance can extend the overall service life of the equipment matching system by 1900 working hours compared with casual maintenance modes.

We supply the following spare parts:

7. On-site Fault Maintenance Cases

7.1 Hydraulic Leakage Fault in Changqing Oilfield

Location: Changqing Oilfield, Shaanxi; Equipment Model: JC70DB1302 drilling equipment; Operating Load: 82% rated load; Fault Data: Minor hydraulic oil leakage at cylinder joint, system pressure drop of 0.7MPa; Repair Scheme: Replace aging HG4-692-67 oil seal and worn shaft sleeve; Post-repair Index: Zero leakage, hydraulic pressure fully restored to rated value; Customer Feedback: Hydraulic system operates stably with no recurring faults.

7.2 Hoisting Unbalance Fault in Zhongyuan Oilfield

Location: Zhongyuan Oilfield, Henan; Equipment Model: JC70DB series host matching hoisting device; Operating Load: full continuous load; Fault Data: Obvious jitter during hoisting operation, unbalanced load operation; Repair Scheme: Replace damaged balancing device and calibrate guyline assembly; Post-repair Index: Hoisting jitter eliminated, load operation balanced and stable; Customer Feedback: Equipment hoisting accuracy and stability significantly improved.

7.3 Braking Insufficiency Fault in Jianghan Oilfield

Location: Jianghan Oilfield, Hubei; Equipment Model: WCB324 auxiliary brake matching drilling equipment; Operating Load: intermittent heavy load; Fault Data: Braking distance increased by 0.8m, slow response; Repair Scheme: Replace worn braided brake block and adjust braking gap; Post-repair Index: Braking response sensitive, braking distance restored to standard range; Customer Feedback: Braking performance meets field safety operation standards.

7.4 Transmission Abnormal Noise Fault in Karamay Oilfield

Location: Karamay Oilfield, Xinjiang; Equipment Model: K187 reducer matching unit; Operating Load: 76% rated load; Fault Data: Abnormal meshing noise of internal transmission structure; Repair Scheme: Replace aging bearing and positioning key parts; Post-repair Index: Abnormal noise completely eliminated, transmission smooth; Customer Feedback: Equipment operating failure rate greatly reduced.

8. Product FAQ

9. Technical Standard & Procurement Reference

All products are manufactured and inspected in strict accordance with GB/T national mechanical standards and petroleum machinery industry specifications, with complete field test data and professional technical verification. This series of supporting parts provides standardized, unified procurement specifications for daily maintenance, parts renewal and overall overhaul of JC70DB series drilling equipment. Meanwhile, it serves as a reliable technical reference for on-site operators to judge equipment faults, disassemble and assemble components, and optimize operating parameters. Verified by long-term stable operation of multiple oilfield projects, the product series has excellent environmental adaptability and structural durability. Users can select targeted matching accessories according to actual equipment models, operating loads and fault conditions to complete accurate equipment maintenance and ensure long-term stable operation of drilling machinery. Standardized accessory selection and replacement can effectively reduce equipment failure rate and improve overall field operation efficiency.