【Construction Case】 HDL-180D1 Top Drive Drilling Rig

Location (Province):Guangdong

Location (City):Guangzhou

Drilling rig model:HDL-180D1 top drive drilling rig

Drilling tool configuration: 194 casing + 89 drill pipe

Process type: Freeze hole piloting

Construction process:Lead hole

Freeze pipe

    Stratigraphic Situation  

0-0.4 m concrete hardened pavement;

0.4 - 16 m clay layer;

16-42 m sand and gravel layers;

42-50 m strongly weathered sandstone layers;

50-55 m weakly weathered sandstone layer.

Construction angle(°):90

Hole diameter(mm):194

Hole depth(m):55

Construction efficiency(min):330

Pure drilling time(min):180

Pure dismantling time(min):80

    Construction Technique  

1、Align the hole and adjust the vertical construction angle Support the legs to the ground (to ensure the drilling accuracy, check the verticality repeatedly 10 meters before drilling);

2、Cut the hole in the concrete pavement with an open hole drill bit first;

3、Install the casing and casing drill bit to drill into the rock layer! Drill slowly and evenly；

4、Install the drill pipe and composite piece bit, start the pump to clean the casing debris slag and drill to the required depth into the rock;

5、After clearing the hole, remove the drill pipe;

6、Put down the frozen pipe, first weld and seal the bottom of the first pipe, after the other pipes are put, seal the mouth of the pipe;

7、Remove and pull out the casing to complete a hole.