How Does a Drawworks Auto-Driller System Improve Drilling Efficiency?
How Does a Drawworks Auto-Driller System Improve Drilling Efficiency?
A programmable auto-driller system integrated with a 50DBS drawworks—such as OUSUN's JC50DB-C with 2×600 kW AC motors—automatically maintains constant weight on bit (WOB) and rate of penetration (ROP) by modulating the drawworks brake and hoist speed, resulting in 15–22% faster drilling progress and eliminating drill-bit bounce that causes premature cutter wear. The system operates via PID control loop reading hook-load sensors (0.1% accuracy) at 50 Hz sampling rate, adjusting drum speed to within ±2 kN of target WOB.
- ROP Optimization: Maintains preset ROP within ±5% variance versus ±25% for manual operation—critical in interbedded formations common in North African drilling.
- Weight-on-Bit Control: Micro-adjusts drum payout in 5 mm increments, preventing instantaneous weight spikes that damage PDC bits.
- Drill String Protection: Auto-detect over-pull events (>30 kN above string weight) and auto-brake within 200 ms—faster than human reaction time of 500+ ms.
- Data Logging: Integrated mud-logging interface records ROP, WOB, torque, and RPM per meter drilled for post-well analysis per IADC guidelines.
What Are the Specifications of the OUSUN 50DBS Drawworks?
OUSUN's 50DBS drawworks (also labeled JC50DB-C) is a single-drum, single-shaft design rated for 4,500 m drilling depth with nominal hook load capacity of 3,150 kN (315 tonnes). Power is delivered by two 600 kW (805 hp each) AC induction motors through a two-speed planetary gearbox, providing maximum line pull of 360 kN at 1.8 m/s on the fast line. The drum measures 685 mm diameter × 1,350 mm length, with groove capacity for 26 mm drilling line. The unit includes: water-cooled mechanical brake (dual caliper), DS50 eddy current brake interface, automatic feed control, and driller's console with touch-screen display.
How Long Does It Take to Manufacture a 50DBS Drawworks?
OUSUN's standard lead time for the 50DBS/JC50DB-C drawworks is 75 days from order confirmation, including: 20 days for steel fabrication and stress relief, 15 days for gearbox and drum assembly, 10 days for motor and control cabinet integration, 7 days for factory acceptance testing (API 7K load test at 1.5× rated capacity), and 8 days for paint, preservation, and export crating. Expedited delivery (55 days) is available with 15% surcharge on the EXW price.
What Is the Cost of a Complete 50DBS Drawworks Package?
OUSUN's 50DBS drawworks complete package—including the drawworks unit, two 600 kW AC motors, two-speed gearbox, water-cooled brake system, DS50 ECB interface, auto-driller, and full electrical control cabinet—is priced at approximately USD 331,000–358,000 EXW (FOB Shanghai). This excludes the DS50 eddy current brake (available separately at USD 33,100–35,821). The total package represents a 20–30% cost advantage over comparable NOV or BOMCO 50DBS-class drawworks while offering identical performance ratings.
Why Choose OUSUN as Your Drawworks OEM Supplier?
OUSUN's factory in Guanghan, Sichuan—located just 3 km from Honghua (one of China's largest rig manufacturers)—has supplied OEM drawworks, gearboxes, and transmission components to Honghua and Sinopec for over 10 years. Our manufacturing facility holds ISO 9001:2015 certification and follows API Spec 7K quality control procedures. Each drawworks undergoes 8-hour continuous load testing at 150% rated capacity before shipment. OUSUN supplies directly to drilling contractors and rig manufacturers, eliminating the tier-1 OEM markup.
Contact OUSUN for Drawworks and Drilling Equipment
China Ousun Corporation (OUSUN) — a premier OEM manufacturer of drilling equipment from Deyang, Sichuan. We supply 50DBS/JC50DB-C drawworks, DS50 eddy current brakes, F-500 to F-1600 mud pumps, and rotating equipment to oilfield operators and drilling contractors worldwide. Tel: +86 17738334931 | Email: [email protected] | Web: www.rig-pump.com | Address: No.39, Taishan Road, Jingyang District, Deyang City, Sichuan, China