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- W201992935 abstract "Gear-driven draw works have several advantages over conventional chain-driven draw works. Gear-driven draw works have a longer life and working availability (reliability) than chain-driven units, and these factors lead to lower operating costs because of fewer rig shut downs for repairs. The gear shift allows higher speeds and a better adaptation to the performance curve for greater operational efficiency. Additionally, more variable speed selection is possible with direct shifting from 1st to 4th speed. On failure of a gear shift, operation can be continued, with reduced performance, with the autodriller which is integrated directly into the gear shift. Additionally, the gear-driven unit makes less noise and vibration and has a compact construction for reduced weight. The oldest gear-driven draw works have been in use without any gear failure for 27 years, and other gear-driven draw works have worked for many years with no failure." @default.
- W201992935 created "2016-06-24" @default.
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- W201992935 date "1995-02-20" @default.
- W201992935 modified "2023-09-23" @default.
- W201992935 title "Gear-driven draw works have high reliability" @default.
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