Sunday, January 30, 2011

Drill Bits and Core Pieces

Understanding drilling technology and learning how it would handle the rocks of the Alpine Fault was a primary objective of phase 1 of our project. We definitely have been on a steep learning curve over the last few days.


We successfully grouted the lost casing shoe in place and cut through it, but we have now used quite a number of different steel casings. The outer casing (with lost shoe) has an internal diameter (ID) of 150 mm and reached 34 m. We then installed a

our PQ drill string from rattling about. We then inserted our drill string with core barrel and advanced the casing as we cored down. However, even after cutting away the lost shoe, it was very slow progress and very
PWT casing with ID 130 mm, to stop
poor core. By noon today we had still only reached a depth of 45 m and had little to show for it. We decided to abandon coring until we were closer to the fault.
First photo: Diamond coring bit and reamer.


Second photo : Poor core recovery with many fragments of collapsed borehole in the core barrel and a very short run of intact rock. Rates of drilling were less than 1 m per hour and this was one of the best cores collected.

In the meantime work continued on instruments to be put down the borehole, and people caught up on a bit of sleep. The rain was heavy at times and some were probably (secretly) a little glad that we did not have to work in a wet tent through the night.

Photo 3: Mike Hasting splices wires then shrink wraps a temperature sensor onto one of the sensor arrays. One array will measure thermal gradient within the well, while the other records temperature at a finer scale in the 10 m immediately above the fault.

We replaced the coring bit with a flat bit, in an attempt to more rapidly create an open hole. Unfortunately, this didn’t seem to work. It seemed that the borehole wall was causing us problems, providing fragments that were jamming against the drill rods. Very frustrating. Alan Speight, our head driller, then suggested that we try to increase the size of the annulus, so that cuttings had more space to escape. He came up with the
cunning plan of attaching the same size bit onto thinner drill rods, but welded some spacers to the rods, to keep them central and hence the hole straight. Finally, this seemed to be working. Between 10 pm and 11 pm we drilled 4 m.
Right. A cutting bit designed to create an open hole rather than collect core

Below. A cutting bit designed to create an open hole the same size (123 mm) as a PQ coring system, but the bit is attached to drill rods used with the smaller HQ coring system. Steel bars welded in place keep the rods central within the hole.

36 comments:

  1. Thank you for your very nice article, do not forget to read my articles also gambar lucu provide such kind words,kata kata cinta and kata kata mutiara , are deliberately presented to the loyal readers.

    ReplyDelete
  2. I had a drill rod completely snap a couple of months ago, and I still haven't gotten it fixed. I'm glad that you provided so much information on the different parts and core pieces. This will really help me out when repairing my drill. Thanks a lot for the information. http://afkos.com.au/our-story/

    ReplyDelete
  3. Nice blog! Share a nice information about Drill Bits and Core Pieces and helps to understand the drilling technology.

    Core Drills

    ReplyDelete
  4. I am so much excited after reading your blog. Your blog is very much innovative and much helpful for any industry as well as for person.

    ____________________
    Etiqa takaful

    ReplyDelete
  5. Hello I am so delighted I located your blog, I really located you by mistake, while I was watching on google for something else, Anyways I am here now and could just like to say thank for a tremendous post and a all round entertaining website. Please do keep up the great work. best truck tool box

    ReplyDelete
  6. Good read! Do you mind if I reference a picture for a new article on https://www.drillbitlab.com ? I'll link back to this page here.

    ReplyDelete
  7. Nice Blog Thank you for Sharing information about such products. For Exploration Products like Wire Line Core Barrels visit Focus Mining .

    ReplyDelete
  8. thank you for sharing such an informative blog about drill bits.....http://www.kgrindustries.co.in/

    ReplyDelete
  9. Commenting on a blog is an art. Good comments create relations. You’re doing great work. Keep it up. Drilling Button Bits Exporters

    ReplyDelete
  10. Thank you for Sharing information about such products Nice Blog. For any of the Exploration Products like Wire Line Core Barrels in Australia & South Africa visit Focus Mining .

    ReplyDelete
  11. The PorcelainPlus Speedbit(R) was specifically designed for drilling efficiently through hard surfaces. Its speed and durability distinguish itself from other standard carbide bits. With a specially formulated mix of metals and superior designed carbide tip, the PorcelainPlus Speedbit(R) makes installations quicker and easier, therefore, more profitable. For more info visit https://porcelaindrillbit.com

    ReplyDelete
  12. Tool Tech Industry offers Woodworking PB13, MB13, MH13, C23, drill bits in compitative prices. Check our machines, Used Machines & drill bits.

    ReplyDelete
  13. Can any one tell me that is there any on the web classes for Search engine marketing, because I wish for to learn more on the topic of Search engine marketing.

    ----------------------
    Best web development company in Kanpur India

    ReplyDelete
  14. Very Nice Blog..
    http://www.svedrillingtools.com/

    ReplyDelete
  15. Nice Post..
    http://www.svedrillingtools.com/

    ReplyDelete
  16. Interesting Blog..
    http://www.svedrillingtools.com/

    ReplyDelete
  17. Thanks for sharing this nice blog on drilling tools..
    http://www.svedrillingtools.com/

    ReplyDelete
  18. Nice Post...
    http://www.svedrillingtools.com/

    ReplyDelete
  19. Thanks for sharing..
    http://www.svedrillingtools.com/

    ReplyDelete
  20. Thanx for sharing this informative content with us...
    =========================
    Software development company in kanpur

    ReplyDelete
  21. Thanks for posting these blog .Informative blog

    ReplyDelete
  22. Nice Blog on Drill Bits...
    http://www.svedrillingtools.in

    ReplyDelete
  23. The PorcelainPlus Speedbit(R) was specifically designed for drilling efficiently through hard surfaces. Its speed and durability distinguish itself from other standard carbide bits. With a specially formulated mix of metals and superior designed carbide tip, the PorcelainPlus Speedbit(R) makes installations quicker and easier, therefore, more profitable. visit at porcelaindrillbit.com

    ReplyDelete
  24. Very Informative Blog, welcome to visit our newest website at www.gvdrill.com for more information about diamond core drilling tools including BQ NQ HQ PQ etc.

    ReplyDelete
  25. Your blog is very informative and such a great information. Thanks for sharing your ideas by this way.

    directional drilling company Adelaide

    https://www.undergroundinstallations.com.au/

    ReplyDelete
  26. Very informative. I am very passionate about woodworking and drilling bits have always been innevitable.

    https://yardoutdoorexpert.com/

    ReplyDelete
  27. Wow! I love this “Drill Bits and Core Pieces”,
    Nice Article,
    We are a Middle East focused innovative fixing systems creators offers Chemical anchors, Mechanical anchors to Anchor fastener, Foams & Sealants to Fire Stop, I think this Solid Carbide Drills concept will helpful in productivity and efficiency in our field.
    Keep it up writing on more articles.
    Thanks,
    fischer middle east.

    ReplyDelete
  28. Thank you for sharing the information. Have you checked out drill bits manufactured by Rockpecker? Do visit Rockpecker Limited

    ReplyDelete
  29. Based in Sydney, we are a family-owned business that has been established for over 20 years. We provide dedicated concrete and demolition services to a whole host of small local businesses as well as to major construction companies.

    Concrete Cutting Sydney
    Core Drilling Sydney
    Concrete Cutter Sydney
    Concrete Cutting Northern Beaches
    Concrete Cutting Campbelltown

    ReplyDelete
  30. Wow! That is an amazing piece of information. Rockpecker is also a great place to buy drilling products in Australia.
    For more details visit here: Australian Drill Bits For Rock

    ReplyDelete
  31. Among the various drill bits, carbide-tipped drill bits are popular for tile drilling. These are also the most common types for masonry and concrete. Despite their high price, they are durable and strong. Some of these drill bits can even double up as your normal hole. For best results, choose the bit that is designed to handle the toughest job. Once you have decided on the size and type of drilling bit, you can choose a different tool for different surface

    ReplyDelete
  32. Thanks For Sharing These Blog With Us...
    Nice Blog...

    ReplyDelete
  33. Superb! I'm so glad I came across your post here, I'm looking for drill bit and got your blog post, thanks for sharing.

    ReplyDelete