Borehole Drilling Method

cable tool drilling

alt label
cable percussion drilling more like this
notation 2.1 more like this
definition A percussion drilling method that uses a heavy drilling tool that is raised and lowered with enough force to pulverise the rock, with the debris removed by a bailer. Although this drilling method has largely been supplanted in recent years by other, faster drilling techniques, it is still the most practicable drilling method for large diameter, deep bedrock wells, and in widespread use for small rural water supply wells. The impact of the drill bit fractures the rock and in many shale rock situations increases the water flow into a well over rotary. Many large diameter water supply wells, especially deep wells completed in bedrock aquifers, were completed using this drilling method. more like this
source more like this
broader percussion drilling
narrower cable tool drilling
in scheme boreholedrillingmethod
is primary topic of cable tool drilling