DOWNHOLE MACHINING OF WELL COMPLETION EQUIPMENT

摘要

The present invention relates to a method for completing a subterranean wellbore comprises the steps of (a) providing a workpiece that comprises (1) a first section that comprises a first material, and (2) a second section that comprises a second material, the second section forming at least one surface of the workpiece; (b) placing the workpiece in the subterranean wellbore; and (c) machining the workpiece to remove at least part of the second material in the second section, whereby at least one surface of the workpiece is formed into a desired configuration. The invention provides also a downhole assembly suitable for such a downhole machining. This method allows, for example, a landing nipple to be installed in a wellbore, and customized locking recesses to be formed in the inner surface of the nipple at a later time.