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GB9800344D0
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Positioning assembly
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Positioning assembly
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Apparatus for and a method of drilling and lining a second borehole from a first borehole
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Apparatus and method for drilling and lining a second borehole from a first borehole
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CA2210852A1
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Multiple drain drilling and production apparatus
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Apparatus for sensing the resistivity of geological formations surrounding a borehole
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A well data telemetry system
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Multiple drain drilling and production apparatus
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A well data telemetry system
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