Apparatus and method for acquiring information while drilling

Wells – Processes – With indicating – testing – measuring or locating

Reexamination Certificate

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Details

C166S250070, C166S100000

Reexamination Certificate

active

07114562

ABSTRACT:
An apparatus and method useful for acquiring information from a subsurface formation penetrated by a wellbore contemplate the use of a tubular body adapted for connection within a drill string disposed in the wellbore. The tubular body is equipped with one or more protuberances (e.g., ribs) defining an expanded axial portion. A probe is carried by the tubular body at or near a first location within the expanded axial portion of the body where the cross-sectional area of the expanded axial portion is a minimum. The probe is movable between retracted and extended positions. In another aspect, the inventive apparatus may further include a cover releasably-secured about the probe for protecting the probe while drilling. In a further aspect, the inventive apparatus may include a shearable backup support carried by the tubular body azimuthally opposite the probe permitting release of the apparatus from the wellbore in the event of a failure. In yet another aspect, the probe is at least partially carried within a debris-clearing channel formed in a protruding portion of the tubular body to promote free movement of the probe within the wellbore.

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Lang, Karl, PVT Data in Time and Online, Apr. 2003, Hart's E&P.

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