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Sidetracked
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
- A term applied when tools or downhole drilling equipment is not recovered from a borehole because of the drilling-by or bypassing techniques used.
- A term applied when a borehole has been deflected so as to bypass an obstruction.
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Obstruction, английский
- Any defect in the track or track formation, or obstacle on, above or adjacent to the track which will prevent the safe passage of trains.
- Препятствие
- When a defensive player, instead of going after the ball, uses his body to prevent an offensive player from playing it.
- 1. something which blocks a passage or a blood vessel 2. the blocking of a passage or blood vessel
- [1] a reef, shoal, wreck, or other object making it necessary to change course in avoidance. [2] something that impedes a radar beam. because of diffraction there is some illumination behind an obstruction, with lower frequency beams tending to illuminate more of the shadow region than beams of higher frequency or shorter wavelength.
- Any buried object that lies completely or partially within the cross section of the microtunnel and that impedes continued forward progress along the design path and within allowable tolerances.
- Any object or feature that lies completely or partially within the cross-section of a microtunnel or drill that prevents continued forward progress.
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Single jack, английский
- A lightweight hammer (usually 4 pounds or less). when used in hand-drilling holes in rock, the hammer is held in one hand and the drill is held in the other.
- A term sometimes incorrectly used to designate a sinker drill.
- A drill column having a single jackscrew in the bottom end. see drill column.
Side thrust, английский
- The lateral force against the borehole walls resulting from the buckling or sag in the drill rods at one or more points above the bit.
- The lateral force developed when the area covered by the bit is not uniformly hard.
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