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发明名称
抽油机无牙光杆卡
摘要
本实用新型提供了一种抽油机固定光杆的无牙光杆卡,它主要由两个主体、两个圆柱楔通过联接板及活节螺栓、圆柱销联为一体,圆柱楔的内圆弧面与光杆吻合保持干摩擦状态,圆柱楔的外圆弧面在主体斜圆柱孔中滑动并保持良好润滑,从而既满足抽油机固定光杆的要求,又不损伤光杆表面,有助于延长井口密封时间,减少停抽减产损失,保护环境不受污染。
申请公布号
CN2293639Y
申请公布日期
1998.10.07
申请号
CN97216418.9
申请日期
1997.05.05
申请人
傅永森
发明人
傅永森
分类号
E21B17/16
主分类号
E21B17/16
代理机构
代理人
主权项
1、抽油机无牙光杆卡含有两个主体、两个联接板、两个圆柱楔、两个活节螺栓、两个弹簧及相关的圆柱销,其特征在于:圆柱楔的内外圆弧面中心线夹角的正切值小于0.15,表面保持HRC50以上的高硬度,外圆弧面粗糙度数值不大于1.6,内圆弧面的粗糙度数值不小于12.5,两主体上有与圆柱楔相配的斜圆柱孔,斜圆柱孔中心线线段在两主体对称中心线的各自一侧,两弹簧分别支持两圆柱楔。
地址
300280天津市大港油田钻采工艺研究院
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