Blog Posts Tagged "Coring"

Guerrilla Drill-a: an ambush of drilling terms!

(photo of our tool pusher, Bubba, with an XCB and RCB drill bits- by Cedric Hamelin). After reading this blog test your knowledge of drill terms in the quiz at the bottom!

Sorting Data!

At the start of the week we moved from Site BON-2A and Hole 1439A to Site BON- 1A, and we’ve started to drill Hole 1440A, which is ongoing. When an IODP science team completes a drillsite, a Site Report is required (IODP participation involves writing many different reports – Daily Updates, Weekly Updates, Site Reports, and of course the Initial Reports from the cruise).

Our Coring Toolkit

A few days ago we broke the scientific ocean drilling record for the deepest APC core ever obtained (687.4 meters below the seafloor!). But what is APC? And how does it differ from other coring systems?

Drilling into the Depths of the Bengal Fan

Preparations are underway at our third and deepest site. Our target depth is 1500 meters below the seafloor, which is made even more challenging by the fact that the seafloor is 3600 meters below the ship!

Even Empty Cores Have Silver Linings

We've finished drilling at site U1459A, and it was certainly a challenge. It didn't have the chunky fragments like U1458 (the first drill site), instead the sediment switches unpredictably between rock-hard carbonate layers, and soft sediment, making consistent coring incredibly difficult. But we're learning from our struggles!

From site U1459C we have a core that shouldn't be

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Sometimes when we’re trying to get a core, we end up with  just an empty liner. We expect that to happen. What we don't expect is getting a core when we aren't even trying! This happened on Hole C, and left even our experienced geologists a bit baffled.

How we drill and core in hard sediments and rocks

When we want to drill into hard sediments and rocks, we have to change the drill bit. In the deeper part of Site U1480, we used an RCB (Rotary Core Barel) drill bit rather than the APC/XCB we used before for coring the younger, softer sediments.*

Behind the Science - APC, XCB, RCB : a world of acronyms

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One of the first things that I realized living on the JOIDES Resolution is that the people speak using a lot of acronyms.

Some of the most mysterious for me were the ones related to the drilling system.