Drill string protection

专利名称：Drill string protection发明人：Frederick Powada申请号：US08/155256申请日：19931119公开号：US037342A公开日：19950801

摘要：A wear-resistant sheath for a cylindrical drill string component, includes acylindrical fiber-reinforced matrix snugly embracing the drill string component.Embedded in the sheath is a spaced array of hard substantially cylindrical pins, each ofwhich has a body having an opposed pair of ends. The pins are disposed substantiallyradially of the sheath, with one end of each pin disposed substantially at the outersurface of the sheath, the other end being preferably disposed in contact with thecomponent and embedded therein to lock the sheath to the component.

申请人：POWADA; FREDERICK

代理机构：Lowe, Price, LeBlanc & Becker

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