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by doodlebugging
454 days ago
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He is probably on a rig drilling a deviated well to 30k+ total depth (TD) so that it is not a vertical well 30k+ feet deep or 30k' true vertical depth (TVD), it is instead a deviated well with a long vertical section before the kickoff point which deviates the drillbit to the target at some horizontal displacement from the vertical borehole with the total length of the drillstring being 30k+ feet when they reach TD (total depth). With horizontal drilling and use of steerable mud motors you aren't rotating the drill string constantly as you drill the deviated section and this allows one to push the bit through the formations until you reach the target. Drilling 6 miles vertically without using a media to conduct cuttings to the surface would be a major change in how things work. I don't think that glassing the inside of the borehole by fusing cuttings as you drill will create a durable borehole. We used to have problems with electronics desoldering at depth in our MWD tools. It gets hot and the pressures can be enormous. Former Scumbagger MWD engineer here. |
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You're completely right doodlebug, our MD is around 30,000 with a TVD of about 26,000' (ballparking here so i'm not violating any contracts).
I also appreciate your other comments here!