公开(公告)号：US4610320A

公开(公告)日：1986-09-09

申请号：US651925

申请日：1984-09-19

申请人： Billy Beakley

发明人： Billy Beakley

IPC分类号： B23K35/32 ,  C23C24/10 ,  E21B10/46 ,  E21B17/10 ,  E21B10/00

CPC分类号： E21B17/1085 ,  B23K35/327 ,  C23C24/10 ,  E21B10/46 ,  Y10S428/937 ,  Y10T29/49982 ,  Y10T428/12139

摘要： A method is disclosed for applying hard tungsten carbide particles to the surface of metal stabilizers used in the drilling of oil, gas, geothermal and water wells. The process consists of applying a soft, elastic metal powder to the surface of the substrate. Large tungsten carbide particles, which have also been coated with the soft powder, are placed on top of the layer of soft powder. The particles are then covered with additional soft powder, which powder is then fused to form a homogeneous, large tungsten carbide particle containing mixture bonded to the substrate. A hard matrix is applied and fused over the large tungsten carbide particle containing mixture. The large tungsten carbide particles, which have a low coefficient of expansion, are thereby contained in a soft elastic metal matrix which acts as an expansion and cushion material, while the hard matrix presents a less resilient, more wear resistant surface. This arrangement is advantageous because the coefficient of expansion of the hard matrix material is much higher than the coefficient of expansion of the carbide particles. The soft elastic matrix thereby cushions the carbide particles and prevents them from being crushed as the hard matrix expands and contracts in response to changing temperatures and conditions.

摘要翻译： 公开了一种将硬质碳化钨颗粒施加到用于钻井油气，地热和水井的金属稳定剂表面的方法。 该方法包括将柔软的弹性金属粉末施加到基底的表面上。 也已经涂覆有软粉末的大碳化钨颗粒被放置在软粉层的顶部上。 然后用另外的软粉末覆盖颗粒，然后将该粉末熔融以形成含有混合物的均匀，大的碳化钨颗粒与基材结合。 将硬质基体施加并熔合在含有大碳化钨颗粒的混合物上。 因此，具有低膨胀系数的大碳化钨颗粒被包含在用作膨胀和缓冲材料的软弹性金属基体中，而硬质基体具有较小的弹性，更耐磨的表面。 这种布置是有利的，因为硬质基质材料的膨胀系数远高于碳化物颗粒的膨胀系数。 软弹性基体由此缓冲碳化物颗粒，并防止它们随着硬质基体膨胀而变形，并响应于不断变化的温度和条件而收缩。