| 摘要 |
A submergible electric pump has a discharge head provided with a locking device for locking the discharge head to a well liner. The locking device comprises a plurality of lugs that are projected into a groove in the well liner when the pump is lowered through the liner to an operative position, at which the discharge head is sealed in the liner. The discharge head has inner and outer tubular members, the outer member seating on the liner and being held against rotation relative to the liner. The inner member continues to move downwardly after the outer member is seated, camming the locking lugs outwardly through windows in the outer member and into the liner groove. The lugs provide support for the weight of the pump installation and prevent rotation between the inner and outer members of the discharge head.
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