DTH Drilling - Sediments Not Coming Out

I am using 127 mm DTH Drilling Bit with 4" hammer for water well drilling.

The pressure output is 9-10, for water well drilling the formation is s loose formation.

The problem are the sediments (small rocks) which are not coming out of the hole. Because of this, I fear that the bit will get locked inside the hole while drilling and will be impossible to bring out easily.  Please see the attached video.

Please help me out with this - what should I do?

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Taxonomy

• Well Drilling
• Drilling
• Drilling Machinery

5 Answers

1. May require high pressure hose in hole while drilling..."Jetting". Similar to Bridge Piling.

   1 Comment

   1. Thank you brother

2. Get sure DTH bit is penetrating formation, might be any steaky play layer encountered and DTH bit unable to penetrate steaky compact clay.

   OK good luck

   1 Comment

   1. Will surely Check , thank you brother

3. The Drilling diameter vs. drill-pipe size is probably too big  to get the cuttings lifted. Try to inject water (I hope you did already for cooling & lubricating your hammer and the bit while drilling) and add any kind of foam additives you can find on the market (even OMO or whatever kind of washing powder is allowed) and add it into the water, which you inject into the airline...make sure you get a slope somewhere, secure any kind of holes and pits by marking them and lift all tools from the ground, because you'll create a foam-tarpet and it can become dangerous for your colleagues. It is, of cause, an environmental impact if you are in sensitive areas like lake, river or food supply-farming. The other option is to get biodegradable products or just a stronger compressor with more air volume min. 300 lit/sec @ 12 bar.

   If you want to know more about, please let me know.

   Good luck.

   Ulf

    

   1 Comment

   1. Thank you brother , I also think that the size of the Drilling rod is bigger , I will try to use a smaller size Drilling Pipe

4. What drilling lubricants are you using, good drilling lub can help.

5. Increased aur volune/pressure will help improve hole cleaning or consider mist/foam drillingvif your rig package will allow

   1 Comment

   1. Yes brother will surely try to increase the pressure