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TIANHE OIL GROUP HUIFENG PETROLEUM EQUIPMENT CO., LTD.

All Products >> Manufaturer

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drilling collar
drilling collar
Specification: 10ˇ±long wear pad at 30ˇ±from pin shoulder
Detail: Spiral Grooving Spiral Grooving In order to avoid differential pressure sticking in the hole. Note 1-Loss of weight is approximatively 4%, co***red to slick drill collars. Note 2-Length of spiraled section allows...
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