* It is proved to drilling in many strata such as clay, unconsolidated soil, sand soil, silt stratum, backfilled earth, the stratum of gravel, weathered rock and frozen ground, etc.

Structure and Features of Rotary Drilling Rig:
* Chassis: extensible chassis with strong flexibility to improve stability of rotary drilling rig.
* Power parts: Cummins series turbocharged engine, which with good reliability
* Electric control system: adopts the leveling system from Shanghai PalFin Co., Ltd.
* Hydraulic power system: rotary drilling rig adopts hydraulic transmission control system in an effort to control the power load timely.
* Tower: three section foldable backstay, the height can be adjusted during transportation.
* Kelly bar: Friction Kelly bar and interlocking Kelly bar can be chosen to mount on this engineering machinery.
* Drilling bit: this rotary drilling rig can be equipped with short auger bit, common drill bit or core bit.

Main Parameters of Rotary Drilling Rig:

Model	SD10	SD12	SD20	SD22	SD28L
Height of drilling tower (m)	16.4	20.1	20.1	21.5	22.87
Stroke of crowd cylinder (m)	4	4	5.7	5.7	5.7
Force added (kn)	100	160	200	220	250
Pulling force (kn)	150	160	200	220	250
Pulling force of single wire of main winch (kn)	140	140	200	220	250
Pulling force of single wire of auxiliary winch (kn)	50	50	75	75	75
Drill bit diameter(with sleeve) (mm)	1000	1000	1500	1500	2000
Drill bit diameter(with sleeve) (mm)	1200	1500	2000	2000	2500
Motor Model	KDK100	KDK120	KDK200	KDK250	KDK280
Rotating torque (kn.m)	100	120	200	250	286
Rotating speed (r/min)	10-35	8-30	8-30	5-25	6-30
Diesel engine power (kw)	125	125	194	194	263
Flow of hydraulic system (L/min)	2×230	2×230	2×260	2×260	2×380
Pressure of hydraulic system (bar)	300	300	330	330	330
Width of telescopic chassis	_	JT45	JT70	JT70	JT80
Track panel (mm)	800	800	800	800	800
Chassis length (mm)	4660	5090	5680	5680	5680
Chassis width (retracted) (mm)	3200	3200	3200	3200	3300
Chassis width(protracted) (mm)	3200	4300	4300	4300	4500
Weight (t)	40	45	65	66	75

Model	SD12W	SD20W	SD22W	SD28LW
Height of drilling tower (m)	20.1	20.1	21.5	22.87
Force added of winch (kn)	200	200	200	250
Pulling force of winch (kn)	200	200	200	250
Pulling force of single wire of main winch (kn)	140	200	220	250
Pulling force of single wire of auxiliary winch (kn)	50	75	75	75
Drill bit diameter(with sleeve) (mm)	1000	1500	1500	2000
Drill bit diameter(with sleeve) (mm)	1500	2000	2000	2500
Motor Model	KDK120	KDK200	KDK250	KDK280
Rotating torque (kn.m)	120	200	250	286
Rotating speed (r/min)	8-30	8-30	5-25	6-30
Diesel engine power (kw)	125	194	194	263
Flow of hydraulic system (L/min)	2×230	2×260	2×260	2×380
Pressure of hydraulic system (bar)	300	330	330	330
Width of telescopic chassis	JT45	JT70	JT70	JT80
Track panel (mm)	800	800	800	800
Chassis length (mm)	5090	5680	5680	5680
Chassis width (retracted) (mm)	3200	3200	3200	3300
Chassis width(protracted) (mm)	4300	4300	4300	4500
Weight (t)	46	65	66	75