CIRCUMFERENTIAL AND LONGITUDINAL CUTTER COVERAGE IN CONTINUATION OF A FIRST BIT DIAMETER TO A SECOND EXPANDABLE REAMER DIAMETER.

摘要

The Smart Reamer® Tool, Apparatus or Method is used to underream an oil or natural gas well while interlinked calipers and calibration sensors simultaneously record data relating to the geometry of the drilling operation (well diameter, diameter of the underreamed zone) and drilling fluid properties (density). Further sensors provide data on the relative position of the cutting and stabilizing blocks. Other sensors measure vibration data. All the sensors are interlinked by means of microprocessors which compare and correlate said data to automatically verify and deliver a desired wellbore diameter without the need to unnecessarily stop drilling or trip out of the hole.

主权项

1. A bottom hole assembly for use in a wellbore comprising a fixed diameter bit wherein a plurality of cutters extend from a central location to the outer ends of the bit to form a first diameter; and an expandable reamer wherein a further plurality of cutters provide continuation from the first diameter and expand to a second pre-determined diameter by engaging the wellbore in at least 7 different circumferential points.