Эксцентричный износ - OC

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Этот вид износа случается, когда геометрический центр долота и геометрический центр скважины не совпадают.

Результатом этого является получение скважины увеличенного диаметра. Эксцентричный износ может быть распознан по наличию износа тела шарошек между зубками (зубьями), увеличенному износу калибрующей поверхности одной из шарошек и более низкой, чем обычно, механической скорости бурения, во многих случаях этот вид износа может быть устранен сменой типа долота для создания нового отпечатка забоя.

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изменение пород от хрупких к более пластичным;

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недостаточная стабилизация долота при бурении наклонной скважины;

несоответствующая типу долота и породе нагрузка на долото;

значительное превышение гидростатического давления над давлением горной породы.

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Эксцентричный износ - OC

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