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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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 are two different jigs is a jig that can be used to assist with the pushing . One for APC (Figure 6) either APC and one for XCB ((one for lower bit; Figure 76). Lubricate the moving parts of the arbor press with Lubriplate, or a mixture of Lubriplate and Marvel Mystery Oil.

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.

Figures

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