转换接头( Cross-over Sub)

转换接头

使用aisi4145h铬钼钢制造，对微量元素的含量进行有效的控制，接头螺纹表面进行磷化或镀铜处理。根据外形与使用分为三种型式。

a型（同径式）：一只转换接头只有一个外径尺寸。

b型（异径式）：一只转换接头有两个外径尺寸。

c型（左旋式）：转换接头的连接螺纹为左旋形式。

用途：它在不同规格的钻具中起连接与转换作用。

特点：既有执行sy5200－93《钻柱转换接头》标准，又有执行apispec7标准的两种规格的转换接头。出厂产品均经过超声波无损检验和螺纹表面镀铜处理，可以根据用户需要生产各种规格和长度的转换接头。

it"s made from aisi4145h chrome-molybdenum steel. the content of microelement is effectively controlled. the surface of connector thread is phosphorized or copperized. there are three types according to its shapes and uses:

a (same diameter): one sub only has one od size

b (different diameters): one sub has two od sizes

c (left-handed): sub"s connected thread is left-handed

function: performing the function of connecting and switching in drills with different specifications

feature: two types of subs, in accordance with the standard of sy5200－93 ( sub of drill stem) or apispec7. the products for exfactory are tested by ultrasonic without damage and copperized on the surface of threads. we can produce all kinds of switchover joints with different specifications and lengths.weigao makes worldwide friends with honest, enduring, reciprocal business styles. please feel free to contact us at any time