Wells – Processes – Graveling or filter forming
Patent
1992-07-28
1994-02-22
Britts, Ramon S.
Wells
Processes
Graveling or filter forming
166296, 166227, E21B 4308
Patent
active
052879232
ABSTRACT:
Sand control screens temporarily plugged with paraffin wax are installed in deep open hole wells wherein the wax has a melting temperature slightly greater or less than the nominal formation temperature in the zone from which well fluids are to be produced. Drilling fluids and other solids-laden wellbore fluids are removed from the wellbore by flowing the well up through a section of tubing disposed distal of the screen, through the interior of the screen and through the tubing string to the surface until the wellbore is cleaned. The wax is then melted due to the temperature of the produced fluid, is dissolved by the produced fluid or a solvent pumped down through the tubing string or is heated by a heater inserted into the interior of the screen such as a wireline conveyed electric heater. The distal tubing section is plugged so that production fluids are forced to flow through the sand control screen in a conventional manner.
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Cornette H. Mitchell
Morrison Stephen E.
Atlantic Richfield Company
Britts Ramon S.
Martin Michael E.
Tsay Frank S.
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