提升短节 Lifting Sub

提升短节是石油、天然气和地质勘探钻井工程中提升钻具的专用工具。由高强度的合金结构钢经热处理后制成，其机械性能达到钻铤的机械性能要求，接头扣型符合api规范要求。按上部台肩形状分为斜台肩（18度）和直台肩（90度）两种结构，以适应吊卡的结构要求，供用户选用。

lifting sub

the lifting sub is a special tool for lifting drill tools in drilling engineering of petroleum, natural gas and geological exploration. it is made of high strength structural alloy steel and processed by heat treatment. its mechanical properties can meet the requirement of drill collar, and the connections are up to api standard. according to the shape of the up shoulder, it can be divided into two types of sloping shoulder (18 degree) and straight shoulder (90 degree), in response to the requirements of elevator’s structure and to customers use.