Changes

The most common barrier foil laminate is ProtecCore. This laminate consists of aluminum foil--the major moisture and oxygen barrier--between several layers of bonded plastic. The innermost layer, Barex, is inert and heat sealable. The outer two plastic layers, polyethylene and polyester, provide strength and rigidity.<ref name=Hunt_etal_1988 /> The properties of the various components of ProtecCore are given in [[:Image:Table rose time-value-of-money 1.jpg|Table 4]]. The steps to preserve a core using this method are as follows:

The most common barrier foil laminate is ProtecCore. This laminate consists of aluminum foil--the major moisture and oxygen barrier--between several layers of bonded plastic. The innermost layer, Barex, is inert and heat sealable. The outer two plastic layers, polyethylene and polyester, provide strength and rigidity.<ref name=Hunt_etal_1988 /> The properties of the various components of ProtecCore are given in [[:Image:Table rose time-value-of-money 1.jpg|Table 4]]. The steps to preserve a core using this method are as follows:

# Wrap the core in three or four layers of Barex film to prevent the core from puncturing the ProtecCore laminated material.

# Wrap the core in three or four layers of Barex film to prevent the core from puncturing the ProtecCore laminated material.

# Slip the prewrapped core into the ProtecCore laminate tube. One end of the package is sealed with a heat sealer. The air space within the package is minimized by flattening it out as much as possible before heat sealing the other end of the package. To reduce free space around the core even further, a small hole can be left in a corner and a vacuum pulled on the package.

# Slip the prewrapped core into the ProtecCore laminate tube. One end of the package is sealed with a heat sealer. The air space within the package is minimized by flattening it out as much as possible before heat sealing the other end of the package. To reduce free space around the core even further, a small hole can be left in a corner and a vacuum pulled on the package. This pulls the packaging down tight on the core and removes most of the air. The hole is then heat sealed.<ref name=Whitebay_1986>Whitebay, L. E., 1986, Improved coring and core-handling procedures for the unconsolidated sands of the Green Canyon area, Gulf of Mexico: [[spe:15385|SPE paper 15385]], 61st Annual Technical Conference and Exhibition, New Orleans, LA, Oct. 5-8.</ref>

 

This pulls the packaging down tight on the core and removes most of the air. The hole is then heat sealed.<ref name=Whitebay_1986>Whitebay, L. E., 1986, Improved coring and core-handling procedures for the unconsolidated sands of the Green Canyon area, Gulf of Mexico: [[spe:15385|SPE paper 15385]], 61st Annual Technical Conference and Exhibition, New Orleans, LA, Oct. 5-8.</ref>

# For protection during shipment, the individual pieces should be wrapped in pads or bubble wrap.

# For protection during shipment, the individual pieces should be wrapped in pads or bubble wrap.