Webster’s Revised Unabridged Dictionary · 1913
Packer
Pack′er, n. A ring of packing or a special device to render gas-tight and water-tight the space between the tubing and bore of an oil well. [U. S.]
Webster’s Revised Unabridged Dictionary · 1913
Pack′er, n. A ring of packing or a special device to render gas-tight and water-tight the space between the tubing and bore of an oil well. [U. S.]