DROP & RETRIEVE TOOL CARRIER

Abstract: a tool carrier has been designed to lower tools into the borehole that will be “heavier” than the displaced wellbore fluid on the drop configuration, but “lighter” than the wellbore fluid on the retrieve configuration. thus, conveyance down the hole by gravity is how the carrier conveys tools into the hole. the tool may thus be conveyed without wireline and during periods of shut-in. then at some event (i.e. pressure, temperature, time, depth, etc.), the carrier transforms to the retrieve configuration by ejecting enough mass that the carrier and any attached tools become “net lighter” than the displaced wellbore fluid, and so begin to float to surface. once the surface is reached the tool carrier and tool may be retrieved.

Inventor(s): Dustin K. WARD

CPC Classification: E21B47/01 (Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like)

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