【Construction Case】HDL-300 top drive drilling rig

Engineering Difficulties

The stratum in Xinjiang is generally dominated by large pebble layer

High strength, leakage and permeability, difficult to form holes

Let's see how Anman Rig HDL-300 accomplishes this challenge!

Stratigraphic Situation

Location (Province): Xinjiang Uygur Autonomous Region

Location (City):Altay

Drilling Rig Model: HDL-300 Top Drive Drilling Rig

Drilling tool configuration: 146 casing + 89 drill pipe

Process type: Rotary spray lead hole

Construction process: Duplex rotary spraying

Stratigraphic conditions:

0-20 m block backfill (with gaps and little slag discharge);

20-24 m hollow (leaking, no slag return);

27-30 m (encountering larger blocks, large leakage, easy to suddenly jam the drill, drilling slower);

30-50 m (sandstone layer changes color from light to black);

50.5 m see rock;

50.5-54m black mica quartz schist

Due to the geomorphology, the hole depth is deep or shallow, the depth varies from 24m to 66m, the average depth of the hole is about 40m, usually the rotary pressure is 18-22MPA

Construction angle(°):90

Hole diameter(mm):150

Hole depth(m):54

Construction efficiency(min):180

Pure drilling time(min):105

Pure dismantling time(min):40

Construction Technique

1、The rig is loaded with drill pipe and casing, the rig first adjusts the vertical to the hole point for the first time, and corrects the verticality again for the second time.

2、 the mast topped the ground, after two outriggers out.

3、open the wind, first give into the impactor breakage then rotary - into the footage - impactor breakage - slag discharge - impactor no work no feed - open the top drive impact, so repeatedly to achieve uniform feed.

4、Adding casing and drill pipe, it is necessary to ensure that there are no particles in the drill pipe before assembling the drill pipe, which must be turned tightly and the casing fillet can be turned tightly selectively and naturally.

5、During drilling, attention should always be paid to whether the impactor is working normally, slag discharge, change in air pressure of the air compressor, change in rotary pressure, change in feed pressure and speed, and selection of impact pressure, which parameters directly determine the efficiency and the size of drilling tool loss.

6、Drill to the rock, clear the hole and remove the drill pipe.

7、Down PVC pipe, pull casing, pull the first casing slow turn selective vibration to avoid PVC pipe brought out.

8、Receive and dismantle the legs and mast, move the machine to the next hole position.

                                                                          --Anman drilling rig sales service: Sun Chong