首页>
外国专利>
WELLHEAD SEALING DEVICE OF SUCKER-ROD PUMPING MACHINE
WELLHEAD SEALING DEVICE OF SUCKER-ROD PUMPING MACHINE
展开▼
机译:抽油杆抽油机的井口密封装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
Provided is a wellhead sealing device of a sucker-rod pumping machine, including a flexible connection unit, and further including a blowout prevention unit, a closing unit, a declination rectification unit and a lubrication unit, wherein the flexible connection unit is arranged between a wellhead and a packing box, and includes a lower flexible sealing sleeve (37), a lower flexible sealing sleeve housing (12), a sealing steel ring (11) and an upper flexible sealing sleeve (10). Portions above the flexible connection unit follow integrally a polished rod (7) constantly to swing, such that a packing (9) is dynamically coaxial with the polished rod (7) and the problem of eccentric wear of the packing can be completely solved. Furthermore, the device can also solve the problems of static coaxiality and lubrication between the polished rod (7) and the packing (9), as well as the problem of blowout prevention when the polished rod (7) is broken off.
展开▼