Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...
Patent
1995-12-29
1998-03-10
Dang, Hoang C.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Tool position direction or inclination measuring or...
175 61, 175 62, E21B 704, E21B 4709
Patent
active
057250596
ABSTRACT:
A method and apparatus for steering boreholes for use in creating a subsurface barrier layer includes drilling a first reference borehole, retracting the drill stem while injecting a sealing material into the Earth around the borehole, and simultaneously pulling a guide wire into the borehole. The guide wire is connected to a source of current to produce a corresponding magnetic field in the Earth around the reference borehole while an adjacent borehole is drilled. The vector components of the apparent Earth's magnetic field are measured vectors are used to determine the distance and direction from the borehole being drilled to the reference borehole in order to steer the borehole being drilled. The process is repeated to provide multiple parallel subsurface boreholes with adjacent boreholes being spaced sufficiently close together to insure overlapping of the sealing material to produce a continuous barrier. The magnetic field used for guidance is also used for signalling the steering tool electronic probe for controlling its measurement program. The guide wire is also used for an antenna to receive telemetry signals for data being sent by the probe to the surface.
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"WieSieAltlasten eins auswachsenFlowmonta," by FlowTex Technologie Import von Kabelverlegemaschinen GmbH.
"Fondazioni Speciali".
Bayer H. J.
Gaenger J.
Kuckes Arthur F.
Dang Hoang C.
Vector Magnetics Inc.
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