How is a core retrieved from a drilling rig?

At the surface, the core is retrieved from the core barrel and placed in transport boxes, which are transported to a laboratory for further study. If coring while drilling is impractical, small cores can be taken on wireline using a sidewall core gun or a sidewall rotary coring tool.

How does a coring drill work?

Once the geologist gives the order to begin coring, the driller pulls the drill bit out of the hole, and the drilling crew exchanges the drilling BHA for a coring bit and core barrel. The hollow coring bit grinds away the rock, leaving a cylindrical core of rock at its center.

What methods do you use for copper exploration?

We have a range of methods to suit any project or deposit type from exploration to resource definition, and through to processing. Historically, copper exploration with soil, rock and drill core samples has involved a simple aqua regia digestion and AAS, ICP-AES or ICP-MS analysis.

What is a rubber sleeve core barrel?

Using a rubber sleeve core barrel is a reliable way to recover core from unconsolidated, conglomeritic, and/or hard fractured formations. The rubber sleeve barrel is unique in that the top of the inner barrel does not move relative to the core during coring.

How long is a drill core?

Cores typically range in diameter from 4.45 to 13.34 cm [1.75 to 5.25 in.] and are usually cut in 9-m [30-ft] increments, corresponding to the length of the core barrel or its liner, which in turn, is consistent with the length of standard drillpipe.

How many cores can a rotary coring tool drill?

Cores from older-generation rotary coring tools are typically less than 2.54 cm [1 in.] in diameter; however, some large-volume rotary sidewall coring tools are capable of drilling up to 50 cores, each 6.4 cm [2.5 in.] long by 3.8 cm [1.5 in.] in diameter.