【Construction case】HDL-168D top drive drilling rig

Formation situation

Location (province): Guangxi

Location (city): Baise

Drilling rig model: HDL-168D top drive multi-function rig

Drill tool configuration: 146 casing + 73 drill pipe

Process type: foundation pit inclined anchor

Construction technology: ordinary anchor cable

Stratum condition: 0-1 m water stop pile; 1-12 m clay layer; 12-20 m sand pebble layer; 20-24 m gravel layer; 24-28.5 m medium weathered rock layer

Construction Angle(°): 25

Hole diameter (mm): 150

Hole depth (m): 28.5

Construction efficiency (min): 160

Pure drilling time (min): 120

Pure removal removal drill time (min): 30

Construction technology

1、Align at the hole position, adjust the construction Angle, and support the legs to the ground;

2、First put the first casing into the ground;

3、Clamp the casing, the power head reverses and open the casing into the first drill pipe, start the water pump to clean the casing gravel; clamp the drill pipe, and the power head reverses to remove the drill pipe;

4、Put the drill pipe into the casing in advance, connect the double pipe with the power head, and start the pump impact rotary drilling;

5、After drilling to the design hole depth, remove the drill pipe;

6、Put the anchor cable into the casing for the first grouting in the pipe when the hole mouth casing is completely returned to the cement slurry grouting;

7、After the casing is removed and pulled, then conduct secondary grouting.

—— Anman Drilling Rig sales service: Wang Qilong