How to remove the pull rod of a down-the-hole drill

How do you loosen a drill rod?

Loosening stage: after clamping the two drill rods, drive the unloading rod cylinder to rotate the upper and lower clamping cylinders relative to each other by a certain angle to loosen the threaded connection between the two drill rods.

How do you drill a hole in a roll pin?

1. drill (use cobalt drill @ smaller diameter than roll pin) hole through base material, at a 45 degree angle, into the roll pin. ensure that you have either created a 'crater' or a hole in the roll pin. start the hole from roll pin about 1/8" away, depth about 1/8" (distances for your roll pin size).

How do you remove a broken drill?

This is one of my preferred methods for removing broken drills. First off, add something like WD-40 or a light oil to the hole in question. Try to grab on to the tap as best you can with the needle nose pliers, and give it a gently wiggle back and forth. Keep in mind that you’ll probably chew up/bend/trash your pliers, so don’t expect them to last.

How do you pull a drillstring out of a hole?

If the wellbore is tight or has a lot of doglegs, it may be necessary to use a rotation joint to help pull the drillstring out of the hole. A rotation joint is a device that allows the drillstring to rotate even if it is bent. Always follow the proper safety procedures when pulling the drillstring from the hole.

How do you pull a drillstring from a well?

The procedure for pulling the drillstring from the hole is as follows: Prepare the wellsite. This includes ensuring that the well is properly shut in and that the rig floor is clean and safe. Circulate the well. This is done to clean the bottomhole assembly (BHA) and to remove any cuttings or debris from the wellbore.

What is rod connection & removal?

Rod connection and removal are crucial aspects of down-the-hole drill operations, directly impacting overall work efficiency and the service life of rock drilling tools.