Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Patent
1993-11-10
1994-10-25
Dang, Hoang C.
Boring or penetrating the earth
Boring without earth removal
Combined with earth removal
7386464, 7386474, 166163, 166169, 175 59, E21B 4908
Patent
active
053580575
ABSTRACT:
An improved module and assembly for sampling liquids and gases within the ground is characterized by module housings containing sampling cavities having lateral openings to the exterior of the housings. Within each lateral opening a removable insert and piston assembly is provided. The piston is displaceable between open and closed positions within the insert in response to changes in pressure from pressure and vacuum sources. When in the closed position, the piston and insert are flush with the exterior of the housing to prevent contaminants from accumulating at the opening. When the module is inserted to a desired depth in the ground, the piston is displaced to the open position and samples from the soil at the desired depth enter the sampling cavity.
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Cooper Stafford S.
Leavell Daniel A.
Lee Landris T.
Malone Philip G.
Peters John F.
Dang Hoang C.
Marsh Luther A.
U.S. Army Corps of Engineers as represented by the Secretary of
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