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4177624 |
An aquatic plant sampler which includes an aquatic craft characterized by a plurality of pontoons secured to a flat deck member and propelled and steered by a dual power system including an above water air propulsion system and an underw...
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3986555 |
A packaged core is obtained using a conventional core barrel system. A lining is provided in the core sample container of the core barrel. The core barrel is connected to a drill string extending into a borehole. As the drill string is r...
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3978932 |
Large-diameter, undisturbed soil core samples were obtained from a variety of soils. Handling and fracturing of the undisturbed soil cores were minimized by encasing the cores in heat-shrinkable plastic tubes during sampling operations.
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3952817 |
Basket type core retainer apparatus that includes a core receiving tube having an axially inner end, an annular drill bit or tubular extension connected to the inner end of the core receiving tube and a core retainer cooperatively mounte...
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3807234 |
A core catcher for a core sampler has a hollow, semi-ellipsoidal body adapted to be fitted into a sample tube and being open at one end to permit material to be sampled to pass into the tube through the body. The body is slit axially fro...
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3786877 |
Apparatus for taking soil samples that includes a drive head attachable to the drill rod of a drill rig having a drive hammer, a sample receiving barrel of longitudinally split barrel sections having a reduced diameter end portions exten...
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3690389 |
A method and an apparatus for taking an undisturbed soil sample are described, by means of which the soil sample, which, during the introduction of a sampling tube into the soil, is surrounded by a hose, is supported substantially over i...
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3578093 |
A method of drilling bore holes which enables a cylindrical solid core sample to be obtained from a formation. A coring bit together with a core barrel and concentrically arranged drill pipe provides central and annular passageways. The ...
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3468387 |
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3463255 |
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3447615 |
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3405772 |
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3352160 |
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3207240 |
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3187824 |
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3169588 |
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3059707 |
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3057415 |
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2859938 |
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2820610 |
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2791398 |
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2779195 |
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2751010 |
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2735652 |
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2709069 |
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2662395 |
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2654572 |
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2643858 |
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2613918 |
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2587231 |
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2555275 |
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2553032 |
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2537605 |
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2492158 |
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2285024 |
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2260678 |
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2256552 |
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2251679 |
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