VFD Drilling Rigs

With increasing demands for automation, efficiency, and safety in modern drilling operations, traditional mechanical drive systems are no longer sufficient. This VFD intelligent drilling rig system is built on advanced AC variable frequency control technology, integrating PLC systems, touchscreen HMI, and pneumatic, electrical, and hydraulic components into a unified design. It enables digital, intelligent, and high-precision control throughout the entire drilling process while reducing energy consumption and labor intensity, making it an ideal solution for oil & gas and engineering drilling applications.

Integrated Intelligent Control System

• Utilizes advanced AC variable frequency drive technology for full-process intelligent control
• Equipped with PLC system and touchscreen HMI for intuitive and efficient operation
• Integrates pneumatic, electrical, and hydraulic systems for coordinated performance
• Supports logic control, real-time monitoring, and remote management of drilling operations

High-Performance VFD Drive System

• Drawworks, rotary table, and mud pump are powered by high-power wide-frequency motors
• Enables full-range stepless speed regulation for various complex working conditions
• Fast response and stable output improve drilling efficiency and accuracy
• Features intelligent soft-start function to reduce mechanical impact and extend equipment lifespan

Stable and Reliable Drawworks Structure

• Single-shaft gear transmission design with simple structure and easy maintenance
• Supports single-speed or dual-speed smooth shifting operation
• High operational stability for long-duration continuous work
• Optional automatic drilling function for enhanced automation

Efficient Braking and Comprehensive Safety Protection

• Equipped with compound hydraulic disc brakes and dynamic braking system
• Provides multiple protection mechanisms: pneumatic, hydraulic, electrical, and motor fault protection
• Includes rotary torque limiting and pump pressure limiting functions
• Enhances overall operational safety and system reliability

Intelligent Operation and Data Management

• Independent driller’s cabin for centralized operation and control
• Supports data storage, printing, and remote transmission of drilling parameters
• Enables data visualization and full-process traceability
• Improves working conditions and reduces labor intensity

Flexible Expansion and System Upgradability

• Optional top drive drilling system for higher operational efficiency
• Supports cluster well drilling with integrated rail system configuration
• Equipped with ET200 or AS-i modules for MCC system monitoring and protection
• Intelligent crown/block positioning control system to prevent top and bottom collisions

This VFD-driven drilling rig combines high-efficiency electric drive technology with intelligent control systems to deliver stable, safe, and efficient drilling performance. It adapts well to both conventional and complex operating environments, while offering flexible expansio

Product types and specifications：

Drilling rig model			ZJ15/900DB		ZJ30/1700DB		ZJ40/2250DB	ZJ50/3150DB
Nominaldrilling depth,m		127mm(5′)drill pipe	700-1400		1500-2500		2000-3200	2800-4500
		114mm(4 1/2′)drill pipe	800-1500		1600-3000		2500-4000	3500-5000
Max. hook load, kN			900		1700		2250	3150
Line strung ofhoisting system			8		10		10	12
Drill line diameter，mm			26		29		32	35
Max. pull of fast line，kN			130		210		280	350
Draw-works	Model		JC-15DB		JC-30DB		JC-40DB	JC-50DB
	Power ratingkW (HP)		300(410)		600(815)		800(1090)	1100(1500)
	Speed		I or II, smooth change				I or IV, smooth change	I or II, smooth change
Brake mode			Hydraulic disc brake + Regenerating brake				Hydraulic disc brake + Regenerating brake（Pneumatic disc brake）
Crown block			TC90		TC170		TC225	TC315
Traveling block			YG135		YG170		YC225	YC315
Sheave OD of hoisting system, mm			660		1005		1120	1270
Hook			YG135		YG170		DG225 or DG250	DG315
Swivel	Model		SL-135		SL-170		SL-225	SL-450
	Stem dia.,mm		64		64		75	75
Rotarytable	Stem dia，mm(in)		444.5(17 1/2)		520(20 1/2)		698.5(27 1/2)	952.5(37 1/2)
	Speed		I or II, smooth change
	Drive mode		combined or independent drive					Independent drive
Mast	Type		K or telescoping		K or A		K
	Height, m		31 or 39		33 or 41		44	45
	Max. load, kN		900		1700		2250	3150
Substr-ucture	Type		Box or telescoping				Dual lift
	Floor height, m		3.8	4.5	5	6	7.5	9
	Clear height, m		2.6	3.3	3.8	4.8	6	7.6
Mudpump	Model×number		F-800×1		F-1300×1		F-1300×2	F-1600×2
	Drive mode		Electric drive or diesel engine drive					Electric drive
Electric control mode			AC-DC-AC