摘要
通过硬度试验的方法,得到在一定作用力下卡瓦牙齿咬入套管试件的咬痕宽度。对咬痕宽度进行研究发现:卡瓦牙齿实际咬入深度约为采用硬度公式计算值的1/3;牙齿上的受力呈线性递减,距施力点越近,牙齿受力越大。依据这一结论,修正了硬度公式并作为计算牙齿咬入力的经验公式。对常用合金钢硬度与屈服强度值统计发现,可以用屈服强度代替硬度值代入硬度公式,这样也可以获得与实际较为接近的计算值。
According to the method of rigidity experiment,the casing specimens’width of bite mark bitten by slips under certain forces was obtained.After the research of the width of bite mark,it was found that the actual height bitten by slips was one third of that calculated by rigidi-ty formula approximately and the forces in each teeth decreased linearly,the forces in the teeth decreased with the increasing of distance between the teeth and force application point.According to the conclusion,the rigidity formula was modified and the formula modified can be used as the empirical formula to calculate the biting forces of the teeth.According to the statistics about the value of rigidity and yield intensity of common alloy structural steel,it was found that when yield intensity was used in the rigidity formula instead of rigidity,the value which is close to that of real measurements can also be obtained.
出处
《石油矿场机械》
2014年第5期49-52,共4页
Oil Field Equipment
关键词
卡瓦
咬入性
硬度
合金结构钢
slips
biting characteristic
rigidity
alloy structural steel
作者简介
韩光耀（1984-），男，河南郑州人，工程师，硕士，主要从事油田井下工具研究，E-mail：hanguangyao_126@126．com。
