High -pressure oil -gas well hydraulic pressure oil pipe anchoring device
The utility model relates to a high -pressure oil -gas well hydraulic pressure oil pipe anchoring device, including the center tube, the outside of center tube is equipped with top connection, cylinder, spring holder, last cone, slips, lower cone and the lower clutch that connects gradually, be equi...
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Format: | Patent |
Sprache: | chi ; eng |
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