CPC E21B 47/12 (2013.01) [E21B 44/00 (2013.01); E21B 47/04 (2013.01)] | 20 Claims |
1. A method comprising:
receiving block position data of a rig prior to addition of a length of pipe to a drillstring, wherein the drillstring is disposed at least in part in a borehole and supported by the rig;
receiving block position data of the rig after addition of the length of pipe to the drillstring; and
controlling position of the drillstring with respect to time using the rig and at least a portion of the block position data for landing a drill bit of the drillstring on a bottom of the borehole,
wherein controlling position of the drillstring with respect to time comprises controlling velocity of the drillstring in an in-hole direction based at least in part on a computed distance between the drill bit and the bottom of the borehole, wherein the computed distance is based at least in part on at least a portion of the block position data.
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