Core Breaker

Published: May 22, 2019 | Last updated: July 5, 2023

What Does Core Breaker Mean?

A core breaker is a piece of equipment in the drilling equipment apparatus used for breaking the core. Core samples are removed during overcoring operations to study the lithology of the soil and rock through which the borehole will pass. Overcoring is done in a pilot hole fitted with a strain gauge, beginning at the borehole diameter.

Radial displacement is recorded by the strain gauge and used for estimating stress for various geological conditions.


Trenchlesspedia Explains Core Breaker

The core is retrieved with a core shovel in a horizontal hole or by using a core puller in a vertical hole. The core breaker wedge is pushed into the borehole until the wedge fits in near the drill bit. The core breaks from the back of the hole by hammering. Core samples are very important for sampling and conducting soil investigation in order to select appropriate boring methods for laying pipelines.

Trenchless methods such as horizontal directional drilling (HDD), horizontal auger boring (HAB), microtunneling and pipe jacking use different types of drill bits and cutters to bore through soil or rock. Since the boring process is carried out underground and out of sight, it is very essential to understand the soil characteristics that exist in the bore path.


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