【Construction case】HDL-180D1 multi-function drilling rig

Stratum situation

Location (province): Zhejiang Province

Location (city): Quzhou

Drilling Rig type: HDL-180D1

Drill tool configuration: 146 casing + 89 drill pipe

Construction technology: casing + drill pipe double pipe drilling

Stratigraphic situation: 6 meters of loose gravel gravel pebble layer.6-10 meters is the sand and gravel layer of medium gravel and small gravel. No soil.

Construction Angle (°): 15

Pore size (mm): 156

Hole depth (m): 10

Construction efficiency (h): 0.8

Pure drilling time (h): 0.5

Pure disassembly removal tool time (h): 0.2

Supporting information

Equipment improvement information feedback:

In this formation, the original drill pipe bit out of the casing bit 10 cm, shortened to protruding three points.

Characteristic:

1、The front end of the tube formed a sweep hole in a slightly larger pebbles easy to introduce bias.

2、Prevent large particles from entering the cannula is not easy to eliminate and reduce the hole washing time.

Other information feedback:

5.5KW sewage pump, 15KW booster pump.146 sleeves with 146-156 drill pipe, 89 drill pipe, 89-115 drill pipe drill

Construction technology:

pebble formation double-pipe impact drilling.

Construction technology

1、The hole position of the drill (the mast is relatively vertical to the working face, and the upper hole point is opposite a line) to facilitate the production of the next waist beam.

2、The four legs of the fixed machine are slightly lifted, it is difficult to hit the ground do not track suspended (with lifting, tower, sliding to the suitable position). And keep the casing center rotary impact into place with the lower clip to continue to add the casing impact to the required depth of 10m.

3、Add 89 inner rod opening pump to impact slag, and repeat until 10m deep.

4、lide the upper cylinder until the lower clamp fails the sleeve buckle, remove the drill pipe with the upper and lower clamp.

5、Insert the grouting pipe into the bottom of the casing hole grouting —— and then under the reinforcement.

6、Pull out and remove the casing for each 4 meters of the socket until the casing is removed. This process characteristics: for about 10 meters, containing a small amount of soil, the main sand and gravel layer. If the conventional double pipe construction together, two people must assemble drilling tools, hole washing time is long, easy to bias hole.

—— Anman drilling rig sales service: Sun Chong