Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1989-03-30
1991-04-02
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
137155, 1661175, 166321, G05D 701
Patent
active
050040073
ABSTRACT:
An improved surface controlled chemical injection valve and method for injecting chemical fluid into the bore of a tubing string of a well are provided, the chemical injection valve having at least one piston movable in response to the pressure of the chemical fluid, an actuator connected to the piston, and a flow restrictor wherein the pressure of the chemical fluid supplied to the valve from the chemical fluid source acts on the piston to cause the actuator to open the valve and inject the chemical fluid into the tubing string bore. The flow restrictor is mounted downstream of the piston to create sufficient available pressure in the chemical fluid upstream of the flow restrictor to act on the piston and hold the valve in the open position.
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Jerry Rubli, "New Developments in Subsurface Safety Valve Technology", Petroleum Engineer International, May 1980, pp. 96-110.
Gordon John R.
Johnson Dale V.
Exxon Production Research Company
Hepperle Stephen M.
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