STANDING INJECTION VALVE WITH HYDRAULICALLY DAMPENED VALVE CLOSURE

摘要

An injection valve assembly for use in a well, where pressurized gas or fluid from uphole in the well displaces a perforated valve head from a valve seat, allows for fluid flow of the pressurized gas or fluid into the valve head and further downhole in the well toward an electric submersible pump. A compression spring is coiled around a valve stem connected to the valve head, pushing the valve stem and valve head in an uphole direction opposite to the force from pressurized gas or fluid. The compression spring is in a chamber filled with hydraulic fluid, where the hydraulic fluid can pass through a dampening system assembly and a flow restrictor assembly, thereby regulating the speed at which the valve stem and valve head can move relative to the valve seat.

主权项

1. An injection valve assembly for use in a well, comprising:
a standing tube casing having an injection valve chamber and a compression spring chamber; a valve seat and a valve head located in the injection valve chamber, the valve seat being for mechanically coupling with the valve head, and the valve head being moveable perpendicular relative to the valve seat to reversibly decouple from the valve seat; an intermediary valve mandrel located in part within the compression spring chamber and mechanically coupled to the valve head, and housing a dampening system assembly and a flow restrictor assembly; a valve stem mechanically coupled to the intermediary valve mandrel, the valve stem being located in and extending through the compression spring chamber; and a compression spring coiled around the valve stem for applying a force to push the valve head to couple with the valve seat.