GAS-LIFT VALVE AND METHOD OF USE

摘要

A gas-lift valve comprising an elongated vertically orientated tubular body with inlet ports positioned for communication with the inlet ports of a gas-lift valve mandrel, a valve seat and valve port at the upper end of the valve body, a movable gas charged dome positioned within the body below the valve seat, a valve ball assembly attached to the dome, and a collapsible bellows positioned to move the dome and manipulate the valve ball assembly downward onto and off of the valve seat in response to pressure from said inlet ports of the valve body and pressure on the seat and thereby allow injection gas to flow upward through the valve port to exit at the upper end of the valve body. A tubular latch is provided with a removable plug to provide for pressure testing and completion of the well with only one wireline trip.

主权项

1. A check valve assembly for controlling fluid flow in retrievable gas-lift valve apparatus, comprising:
a check valve housing, wherein the check valve housing has a vertically extending through-bore; a substantially spherical body slideably disposed within the vertically extending through-bore of the check valve housing; and a seat disposed in a lower portion of the vertically extending through-bore and permitting the fluid flow therethrough.