Cuttings Change: Shape, Size, Amount, Type
Cuttings are rock fragments chipped, scraped or crushed away from a formation by the action of the bit. The size, shape and amount of cuttings depend largely on formation type, weight on the bit, bit dullness and the pressure differential (formation versus fluid hydrostatic pressures). The size of the cuttings usually decreases as the bit dulls during drilling if weight on bit, formation type and the pressure differential, remain constant. However, if the pressure differential changes (formation pressure increase),even a dull bit could cut more effectively, and the size, shape and amount of cuttings could increase.
Read more about this topic: Well Control
Famous quotes containing the words cuttings and/or type:
“Piles of scrapbooks, the cuttings turned by time to the colour of the freckles on an old lady’s hand. Her hand. My hand, as it is now. When you touch the old newsprint, it turns into brown dust, like the dust of bones.”
—Angela Carter (1940–1992)
“Time has an undertaking establishment on every block and drives his coffin nails faster than the steam riveters rivet or the stenographers type or the tickers tick out fours and eights and dollar signs and ciphers.”
—John Dos Passos (1896–1970)