Barrel type blowout preventer for liquid controlled sucker rod. In order to overcome the existing rubber core BOP consists of a metal skeleton and the rubber vulcanization on the pump rod size change of poor adaptability, when the large diameter coupling through, easy to glue core port tear, lead to blowout preventer can not reach the requirements of the anti deficiency spray, the shell of the utility model is the lower part of the annular groove of the blind equipped with the piston, the piston top is provided with a rubber core, rubber seat, gland, the gland and the upper end of the shell is fixedly connected with the rubber core is a conical rubber core, the lower cone rubber core is an annular lip, lip ring is a circular arc shape; the upper end of the plastic core rubber core seat sulfur rubber core seat is fixedly connected; the outer circumference of the central ring groove, fixed end, rubber seat end vulcanized rubber core and the upper end of the seat ring groove on the rubber core. The utility model has the advantages that the structure is reasonable, the rubber core has no inner skeleton, and the colloid wear is reduced.
【技术实现步骤摘要】
【技术保护点】
一种液控抽油杆筒形防喷器，包括壳体、胶芯、活塞、盘根、压盖，壳体下端部的环形盲槽内安装有活塞，活塞上方依次安装有胶芯、胶芯座、压盖，压盖与壳体上端固定连接，胶芯为锥形胶芯，其特征是：所述胶芯（19）锥形体的下端为环状唇边（18），环状唇边（18）外型为圆弧状；胶芯（19）上端与胶芯座（20）硫化固定连接。
【技术特征摘要】
【专利技术属性】
技术研发人员：罗永庆，张康卫，范勇，周新华，袁龙，陈达，
申请(专利权)人：大港油田集团有限责任公司，
类型：实用新型
国别省市：
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