One reason: the bottom of the bucket is closed
When the drill rig uses a frictional rod to drill into the water layer, it is necessary to pay attention to the depth of each bucket. If the footage of the bucket is too deep, then the bucket is filled with dirt, and if the mud continues to be drilled, there is no place to accommodate it. At the slag hole of the drill hopper, it accumulates in front of the bucket teeth. When the accumulated mud reaches a certain amount, the front teeth of the bucket teeth form a large piece of mud, which is equal to the height of the bucket teeth and forms an integral part! The cutting action has been lost. Under the effect of mud or water lubrication, the drilling rig cannot continue drilling. Therefore, when the bottom of the bucket is reversed and closed, the bottom of the bucket has no resistance, so the bottom of the bucket will be reversed with the drilling hopper. I can't turn it off.
Reason two, dregs fall out
After the reversal, the main roll is lifted. When the drill bucket is lifted in mud or water, due to the mud or water having a certain resistance, this resistance will exert a downward force on the residue in the drill bucket, due to the drill bucket. The drill pipe has a conical shape, and the too fast rotary drilling results in insufficient compaction of the dregs inside the drill pipe, and the main roll is lifted too quickly. As a result, the dregs inside the bucket fall out! Therefore, it is not always that the bottom of the bucket is not closed. Earth can fall out...
Three reasons: slippage
At this time, the fallen slag has lost the original integrity of the actual soil. Therefore, after the second boring, the tip of the slag is directly inserted into the slag, and the bottom surface of the screed is directly pressed on the slag, and the drilling rig is rotated. Therefore, the level of the fallen scum is completely compacted. When the slag cannot be compressed, the plane of the floor is supported by the slag, and the bucket tooth rotates repeatedly in the already drawn groove. At this point, three layers are formed. The first layer is a drill bucket that rotates repeatedly. The second layer is the fallen soil. The sandwich layer is the second layer. The third layer is uncut solid soil. Since the diameter of the drill hole matches the diameter of the hole, the drill There is no resistance to rotation of the rod → no reaction force → no friction → no pressure, the bottom and falling dregs are slippery under the lubrication of water or mud.
Reason four, prevent slipping
The skidding phenomenon can be overcome by first combining the depth of the single bucket footage on the display. Although the mud drilling resistance is small, as the internal dross of the drilling hopper increases, resistance will be generated to the slag intake, so the drilling resistance is increased, and the sound of the planetary reducer on the power head changes with the resistance, so the sound of the power head is heard. The amount of measurement can be judged. When the drilling resistance rises, the rotational speed of the power head also decreases. Therefore, the drill speed can also be used to judge the amount of advancement. If the geological changes are not large, the time and depth of each boring should be kept within a certain range, and the depth of single-bucket footage should be within 0.5 to 0.6 meters. When reversing and closing the bottom of the bucket, try to drill with a load. At this time, the bottom of the bucket has a certain resistance so as to prevent the bottom of the bucket from reversing with the drill drum.
Certification:ISO9001:2008
Drilling Rig Tools With Casing , Pipe Drilling Tools , Borehole Drilling Machine
Quick Detail:
1. Anchor drilling tools are used for assisting drilling rigs to accomplish the drilling. Our MD series anchor drilling tools include all kinds of drill rods, casing, eccentric drill tool, concentric drill tool.
2. Drilling tools are drill rod, drill bit, casing and hammer, etc. Drill rod is a metal tube used to transmit broken rock or flushing liquid. The drill bit is a specialized tool used to break the rock. Casing is a tube in the drill hole protecting the wall of the hole. These drilling accessories are manufactured with advanced technology.
3. Anchor drill rod is mainly suitable for DTH hammer, the eccentric drilling tool and casing are usually matched with DTH hammer.
Description:
1. Our company is a specialized anchor drilling tool manufacturer and supplier. Our company is equipped with advanced and scientific technology, production capacity and fast innovation capacity.
2. Our anchor drilling tools have modular combination design. The installation is very easy and convenient. They are easy to transport.
3. The drill rods have many specifications, such asφ73 and φ89. Among these drilling tools, the eccentric drilling tool and casing are usually matched with DTH hammer. The pneumatic DTH hammer features simple structure, good properties, reliable operation and convenient maintenance. It can match all kinds of anchor drill rods and casing.
4.Our certificates are ISO9001-2008 and science and technology researching and development institution of Wuxi City.
Drilling Tools,Drill Machine,Drill Press,Power Drill
JIANGSU XI TEC ENVIRONMENTAL&DRILLING EQUIPMENT COMPANY CO.LTD , https://www.xitecdrilling.com