发明名称 |
STUFFING BOX FOR PROGRESSING CAVITY PUMP DRIVE |
摘要 |
Progressive cavity (PC) pump drive heads require a stuffing box to seal crude oil from leaking onto the ground where the polish rod passes from the crude oil passage in the wellhead to the drive head. Using a pressurization system for the stuffing box, such that the pressure output exceeds the pressure at the wellhead, stuffing box seal life can be extended. Pressurization fluids are introduced between a primary rotary well fluid seal and a pressurization rotary seal. Any leakage of pressurization fluids from the pressurization rotary seal can be directed through a leak passage from the stuffing box or re-circulated through the leak passage to a source of pressurization fluid.
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申请公布号 |
CA2711206(C) |
申请公布日期 |
2012.09.11 |
申请号 |
CA20032711206 |
申请日期 |
2003.08.11 |
申请人 |
OIL LIFT TECHNOLOGY, INC. |
发明人 |
HULT, VERN |
分类号 |
E21B33/08;E21B43/12;F04C2/107;F04C13/00;F04C15/00 |
主分类号 |
E21B33/08 |
代理机构 |
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