The magnitude of this deflection depends mainly on the salinity contrast between the drilling mud and the formation water, and the clay content of the permeable bed.
2.
3, 561, 313 Apparatus for cutting sheet material using bed of granular material ( with David R . Pearl ) ( cloth cutter : knife-permeable bed)
3.
3, 719, 113 Penetrable bed used for cutting sheet material and method for treating same ( with David R . Pearl ) ( cloth cutter : knife-permeable bed)
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