By: Todd Wheatley

(tiktok transcript)

The CME75 has a main hoist and an auxiliary hoist -- most of the rigs have also been modified with a wireline or "sand line" -- it's 27ft from the mast crown to the ground so there's 25ft of effective hoist height -- the addition of the third "cable" provides 75ft of lift capacity without "running rod" - although you will still need to "break" the rod every 25ft -- the SLIP-RING, as shown in this video, allows you to nearly double the amount of rod you can "trip" in & out of the hole -- however, due to the added safety concerns, this method is only used by the most experienced drillers -- as you can see here the drill rod extends above mast putting pressure on the guide above -- the drillers are now going to lower the drill rod back into the hole, but without using the "braking" action needed for longer sections of rod


Geotechnical Drilling: SLIP-RING (tiktok video)


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