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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Personal protective equipment (PPE) shall include: hardhat, safety glasses, gloves (work gloves may should be preferred worn because there may be sharp bits on the outer shoe and many pinch points, chemical gloves can be worn underneath), hearing protection.

Optional

PPE may include: apron or rain coat.

Arbor Press

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

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There are two sides to the toothed, square rod that moves through the press.  One has a longer end portion without teeth.  Does your bit not fit?   The end with the longer portion without teeth, must be on top.  This sometimes gets flipped when opening the press for servicing.  You should be able to retract the rod all the way into the press' gearbox.

See Figure 7 below.

Maintenance

Lube the press and chain vice.

Remove rust from tools.

Grind the hammer end of the tools when they begin to mushroom.

Figures

Figure 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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Try to remove the sleeve from inside of the sub by banging the corner of the sub on the table (notice the dents in the table).  A piece of thick wood can also be used to bang the sub. The sleeve should move down the sub and sometimes will come out.  If the sleeve will not come out then strap the sub in the vice and hammer it the rest of the way out.  Note that the flange on the sleeve is the top of core.

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If the press is unavailable the old XCB sleeve tool needs to be used to get the inner rings out of the sleeve.  Note that the sleeve must be turned around on the chain vice to get the lip of the flange to catch the vice and be stable. Wet the tool.

The core can now be pushed or pressed out of the inner rings.  Maintain orientation at all times, always push or press from the bottom.  Assemble the core catcher in the liner as described above.

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