Core Catcher Procedure

Removing the core catcher material is generally done by a designated technician. Every core recovered has a core catcher at the bottom of the core barrel. The core catcher is removed on the rig floor and passed to the designated technician. The technician must extrude all core material from the core catcher and placed in a core liner (guidelines and rules listed below). That 'Section' of core is called the CC (core catcher).
Below are a series of steps to help guide you through the Core Catcher (CC) procedure.

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1. Affix the endcaps on the liner with acetone. It To avoid potential organic contamination of samples, it is important to ensure all sampling on the catwalk has been completed before doing so.
2. After you have finished processing the CC, measure the length of the final core catcher on the ruler. Give the total length of the core catcher and length of the PAL sample to the Curator or ALO. It is important that this is be an accurate measurement!

Example: For a CC that is 15 cm total length with a 5 cm PAL sample say, "Fifteen with five to PAL" or "Fifteen and five to PAL."

1. Clean the CC section before handing it off to the core lab. Clean the core catcher bench and tools. Be sure to keep the bench stocked with usable core liner. If running low cut new pieces and stock on shelf below CC bench.

Personal Protective Equipment

Required

Personal protective equipment (PPE) shall include: Hardhathardhat, safety glasses, gloves (work gloves may be preferred because there may be sharp bits on the outer shoe), hearing protection.

Optional

PPE may include: apron or rain coat.
Fig. 1: Extruding core catcher material at the core catcher bench. Notice the Paleontologist waiting with white bowl – give PAL sample to paleontologist.
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Fig. 2: Core Catcher Assembly 

Or whatever the length of the PAL sample is.Bottom

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Fig. 3: Core catcher material in Core Liner.

Arbor Press

If the Core Catcher material is difficult to manually push out from the core catcher, use the Arbor Press (see Figures 4 and 5). There are two different jigs that can be used to assist with the pushing. One for APC (Figure 6) and one for XCB (one for lower bit; figures 7). Lubricate the moving parts of the arbor press with Lubriplate, or a mixture of Lubriplate and Marvel Mystery Oil.

Figures

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Fig. 1: Extruding core catcher material at the core catcher bench; notice the Paleontologist waiting with white bowl – give PAL sample to paleontologist.

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Fig. 2: Core Catcher Assembly 

                  *Or whatever the length of the PAL sample is.

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Fig. 3: Core catcher material in Core Liner

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Fig. 4: Arbor Press.
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Fig. 5: Metal disc for pushing on core material.Image Removed 

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Fig. 6: APC Jig.
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Fig. 7: XCB bit jig.Image Removed