Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Patent
1990-09-17
1993-02-16
Noland, Tom
Boring or penetrating the earth
Boring without earth removal
Combined with earth removal
175 23, 175 58, 175249, E21B 4902
Patent
active
051862638
ABSTRACT:
A device for obtaining soil samples beneath the surface of the ground. A sample tube is provided with a removable piston tip blocking the forward opening of the sample tube. Rearward movement of the piston tip is blocked by a removable piston stop. The sample tube is driven into the soil with the piston tip blocking its forward end. Tubular probe extension may be successively added to the rear of the device to allow driving of the sample tube to the desired depth. At the desired depth, the piston stop is removed to unblock the piston tip. The piston stop may be removed by a series of threadedly connected extension rods threadedly connected via a drivehead to the piston stop. The piston stop is threadedly connected to the sample tube with left-handed threads to ensure all other connections remain tight during removal. The sample tube is then driven forward, causing the soil sample to enter the tube and the tip to slide within the tube. The tube is then withdrawn from the soil to recover the sample.
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"Basic Procedures for Soil Sampling and Core Drilling", distributed by Acker Drill Co., Inc., pp. 16-17; published by Dec. 1990; by W. C. Acker III.
Christy Thomas M.
Kejr Melvin P.
Kejr Engineering, Inc.
Noland Tom
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