1200425218, 1200529274, DQ027 Series NC38/5-1/2FH/6-5/8FH Oilfield Drilling Rig Spare Parts

Product Overview

This full set of industrial-grade oilfield spare parts covers core models including 1200425218 NC38 protective connectors, 1200529274 6 5/8″ slip inserts, 1300027841 ball valves and complete DQ019/DQ020/DQ027 series customized drilling auxiliary components. These parts are precisely engineered for land-based drilling rigs, hydraulic pump station systems and FH standard drill string connection assemblies, catering to the core demands of oilfield field maintenance teams, drilling engineering contractors and equipment procurement departments. The product lineup solves common and stubborn on-site faults, including drill string connection loosening, hydraulic system pressure disorder, bearing jamming, torque structural deformation and pressure switch failure under long-term heavy-load cyclic operation. All components comply with API 7K and ISO 10424 international drilling equipment standards, with professional bench test data verifying that core bearing and hydraulic valve components maintain stable working accuracy up to 8300 continuous operating hours without performance attenuation. This document serves as a unified technical troubleshooting guide and standardized procurement reference for daily equipment maintenance, vulnerable part replacement and sudden on-site fault disposal.

Product Introduction

This product portfolio includes drill string protective connectors, slip insert components, torque elimination main beams, explosion-proof pressure switches, self-aligning thrust bearings, hydraulic pipeline fittings, damping rings and integrated guide cover assemblies. It fully covers all consumable and vulnerable parts of drill string connection systems, hydraulic control circuits, lifting box structures and motor pump linkage units. Key specifications involve NC38, 5 1/2FH and 6 5/8FH standard protective joints, adapting to mainstream international drill string matching standards. Every part adopts precision forging and CNC finishing, with bearing and moving components undergoing strict low-temperature toughness testing. All finished products pass dimensional calibration and hydraulic pressure testing to ensure high compatibility and operational stability with conventional drilling rig equipment.

Functional Description

Each component undertakes indispensable functional responsibilities in drilling equipment operation. Standard FH and NC series protective connectors strengthen drill string connection tightness and prevent thread wear and loosening during high-speed rotation. 6 5/8″ slip inserts and snap hook clamps provide stable clamping force for drill string positioning, avoiding operational displacement. The torque elimination main beam offsets torsional stress generated by drilling rotation and protects the main equipment frame from fatigue deformation. Ball valves and overflow valves regulate hydraulic circuit pressure and flow, stabilizing the output of hydraulic systems. Explosion-proof pressure switches and liquid level sensors monitor equipment operating status in real time to ensure safe operation in flammable and explosive field environments. Self-aligning thrust bearings reduce mechanical friction and improve the flexibility of rotating structures.

Structural Characteristics

All spare parts adopt field-optimized structural design targeting high-vibration, high-pressure and dusty oilfield working environments. Double pipe clamp structures achieve uniform pipeline fixing force, solving hydraulic pipeline shaking and abrasion issues caused by long-term vibration. Integrated guide cover assemblies adopt integral forming technology to reduce assembly gaps and improve structural sealing performance. Combined sealing washers and compression springs form multi-stage buffering and sealing protection, effectively resisting hydraulic impact. Self-aligning bearings with open raceway designs compensate for minor structural deviation during operation, lowering equipment jamming risks. Threaded adjusting rods support precise on-site calibration, greatly improving equipment debugging efficiency.

Applicable Working Conditions

This series of spare parts adapts to onshore oil and gas conventional drilling, directional drilling and workover operation scenarios, stably working under operating pressure up to 35MPa and ambient temperatures ranging from -40℃ to 55℃. Compatible with NC38 and multi-specification FH drill string systems and matched drilling rig hydraulic pump units, these parts can run continuously in high-dust, humid and variable-temperature harsh environments, fully meeting the requirements of long-cycle uninterrupted field construction.

Maintenance Guidelines and Practical Engineer Advice

Senior field maintenance engineers recommend conducting a full inspection of drill string connectors, hydraulic valve components and bearing assemblies every 200 hours of continuous equipment operation. Clean the internal passages of ball valves and overflow valves regularly to avoid particle blockage affecting pressure regulation accuracy. Check the elasticity of compression springs and the wear of slip inserts after heavy-load operation, replacing aging parts in a timely manner. Never use mismatched standard connectors and bearings, as tolerance deviation will cause structural vibration and transmission failure. Verified by on-site operation data, standardized cyclic maintenance can extend the average service life of core components by 7600 working hours.

We supply the following spare parts:

1200425218 NC38 Защитное соединение

1200425222 51/2FH Защитный соединитель

1200437861 Ушко

1200521811 Электродвигатель-насос

1200525405 Кольцо центровочное

1200528203 Шайба

1200529274 Сухарь 6 5/8″

1200529584 Стопорная скоба в сборе

1200567652 Основная балка для исключения крутящего момента

1200568180 Правый суппорт

1200592709 Основание

1200648131 Корпус подъемной коробки в сборе

1300004660 Трубный обжимной фитинг

1300006674 Болт

1300022688 Трубный обжимной фитинг

1300024548 Болт

1300027841 Шариковый клапан

1300030306 Взрывозащищенный выключатель давления

1300090183 Трубный обжимной фитинг

1300101773 Шайба

1300102705 Стопорная прокладка

1300105401 Кольцо амортизирующее

1300108754 Комбинированная шайба уплотнительная

1300108796 Втулка

1300108838 Шариковый подшипник с раскрывающимся желобом

1300111786 Переливной клапан

1300119821 Обжимная гайка

1300126390 Радиатор

1300127673 Шланг в сборе

1300127685 Шланг в сборе

1400024925 Взрывозащищенный выключатель давления

1400025331 Датчик уровня

1800002451 Нейлоновая веревка

DQ019.22.04 Прокладочное кольцо

DQ020.01.05 Сжатая пружина

DQ020.12.14 Гильзаподшипник

DQ027.01.15.00Ⅱ Стойка

DQ027.01.19.00Ⅱ Направляющая крышка в сборе

DQ027.01.20.00Ⅱ Направляющая крышка в сборе

DQ027.02.01 6 5/8 FH Защитный соединитель

DQ027.03.09.00 Скоба штропа 500

DQ027.08.02.06 Прокладка датчика уровня

DQ027.08.10.00 Двойная трубная скоба

DQ027.11.03 Зубчатка мотора

DQ027.11.04 Крышка подшипника

DQ027.12.21.00Ⅱ Стопор в сборе

DQ027.12.36Ⅱ Уплотняющий сальник

DQ027.23.03.12.00Ⅱ Регулирующий стержень с резьбой

HH-29444/YB Самоцентрирующий упорный подшипник

шестигранным сосредоточением”

On-Site Fault Maintenance Cases

Case 1: Liaohe Oilfield, ZJ40 Drilling Rig, 28MPa working load. Worn 1200529274 6 5/8″ slip insert caused unstable drill string clamping. After replacement with original matching inserts, drill string positioning error was eliminated, and the equipment maintained stable clamping during 1000 consecutive drilling hours. The field team reported no string slipping or deviation.

Case 2: Daqing Oilfield, NC38 Drill String System, 25MPa conventional load. Aging 1200425218 protective connector led to thread loosening risk. After component replacement, the connection tightness reached factory standards, effectively avoiding thread wear and structural loosening during high-speed rotation.

Case 3: Tarim Oilfield, Hydraulic Pump Station Equipment, 32MPa high load. Blocked 1300027841 ball valve caused unbalanced hydraulic flow. After cleaning and replacement, hydraulic circuit flow stability recovered completely, ensuring synchronous operation of all hydraulic actuators.

Case 4: Shengli Oilfield, Well Monitoring System, 26MPa working pressure. Failed explosion-proof pressure switch caused inaccurate pressure data feedback. After installing new matching switches, equipment pressure monitoring sensitivity returned to standard, supporting safe and stable field operation.

Frequently Asked Questions

Procurement Reference and Product Value Explanation

This series of 1200425218, 1200529274 and DQ027 series oilfield spare parts strictly comply with API 7K and ISO 10424 international industry standards, with complete dimensional inspection reports and performance test data to support engineering application verification. All products are professionally produced and supplied for oilfield drilling and hydraulic supporting equipment, effectively solving common on-site technical problems such as drill string connection failure, hydraulic pressure instability, structural torque deformation and sensor monitoring deviation. With exclusive long-cycle field operation verification data and practical engineer maintenance experience, these products provide reliable technical fault-solving schemes and standardized procurement benchmarks for global oilfield engineering projects. The full-spec product coverage meets the matching demands of mainstream drilling equipment. Professional procurement and maintenance teams can select accurate models according to actual equipment parameters and field working conditions to stabilize equipment operation and reduce overall maintenance costs.