Screw drill centralizer structure
The utility model discloses a screw drill centralizer structure which comprises a centralizer body and wiper blocks which are arranged on the centralizer body. The wiper blocks are right prism-shaped, and the wiper blocks are arranged on the centralizer body in the axial direction, the distances bet...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model discloses a screw drill centralizer structure which comprises a centralizer body and wiper blocks which are arranged on the centralizer body. The wiper blocks are right prism-shaped, and the wiper blocks are arranged on the centralizer body in the axial direction, the distances between every two adjacent wiper blocks are equal, and the wiper blocks and the centralizer body are combined into a whole structure. The screw drill centralizer structure is easy to move vertically but difficult to move horizontally after pressurization under the condition that downhole safety construction and oriented quality are not affected, the influences upon horizontal swing of the centralizer caused by reaction torque are reduced effectively, wherein the reaction torque is generated by contacting of a drill bit and a pit bottom, and therefore the speed of deep mine orientation is accelerated. |
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