Sea Exploration Drilling Rig 1、 Application ：HGD-300A sea engineering geological exploration drilling rig is a top drive power head type drilling machine with long feeding stroke. It adopts the advanced technique of regulating rotary speed with frequenc

2、Features:

1) Top drive power head of drill adopted frequency changer to adjust rotary speed steplessly. It features long feeding stroke,compact structure, rational arrangement and wide regulating speed range. With the result that drilling rig can meet the demand of drilling in a great variety of complicated formation

2) Safety and reliable falling-resistant apparatus of top drive power head can ensure equipment and personal safety.

3) Feed micro-adjusting mechanism of drilling rig can accomplish balanced drilling holes.

4) Mechanization of breaking out drill rods with hydraulic break out apparatus reduces labor strength and increase drilling efficiency.
5) Removing top drive power head rearward integrally ensures large floor space and convenient for frequently hoisting and lowering the drilling rod.
6) Equipped with the advanced bottom sampling device, it can meet sampling demand in complicated formation.

3. Main Technical Specifications:

1) Hole diameter 110 - 600 mm
2) Hole depth 350 -60 m
3) Rod diameter 50 mm - 127 mm
4) Rotary speed of top drive power head
Low speed range (forward and reverse) 7-233 r/min
High speed range (forward and reverse) 16-540 r/min
5) Feeding stroke of top drive power head 3500 mm
6) Electromotor power of top drive power head 30 kW
7) Lifting capacity (single wire rope) of main hoist 30 kN Lifting capacity (single wire rope) of auxiliary hoist 20 kN
8) Derrick height 12 m
Derrick load 180 kN
9) Mud pump BW-250 mud pump, BW-600 mud pump
10) Hydraulic break out apparatus
Center hole diameter 450 mm
Breaking out diameter of rod or casing 50, 127, 178 mm
Breaking out torque 2.2 kNm
11) Overall mounting dimension of main set
Length×Width×Height 2800×1500×5800 mm
12) Weight 6500 kg