This series of videos demonstrates
cable tool drilling. It is not a technique that you can do yourself
without a rig but I included it so you could see how similar it is to the
Baptist Method. This technique is used by some commercial drillers.
It is a very old technique, slow but steady and only requires one person to
operate the rig.
A derrick is raised to support the
cable tool. The cable tool is a drilling "bit" that is repeatedly raised
and dropped in the hole to break up any formation encountered. Then the
cable tool is swapped out and a bailer is lowered into the hole. The
bailer has a valve so that the slurry created by the pounding of the cable tool,
can be bailed out of the hole. As the bailer goes down, the valve
opens and slurry goes into the bailer. The valve closes as the bailer is
raised. The bailer is removed from the hole and emptied. Then it is
put back in the hole until enough slurry is bailed. At that point, the
cable tool bit, is put back in the hole and the pound begins again.
CABLE TOOL DRILLING PRIMER
A BUCYRUS ERIE CABLE TOOL RIG
BORING A WELL
In Sierra Leone, wells are bored using an
inexpensive kit. The mud is removed from the well using a bucket that also
functions as a drill bit. The drilling of a new well is a big deal and the
whole village gets involved. This video was produced by FreshHope