Pressure regulated chemical injection system
OwnerRobert N. Ayresinventor
Life of this patent
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Abstract
An apparatus and method for injecting chemicals into a hydrocarbon producing well is disclosed. The invention includes a vessel which holds the chemical and a pressurized gas which exerts a pressure on the chemical. A pressure regulator and a valve selectively control the injection of the chemical into the well as the pressurized gas urges the chemical out of the vessel. The pressurized gas drives the chemical through the regulator, valve, and into the well without venting the chemical or pressurized gas into the ambient environment.
Claims20
An apparatus for selectively injecting a chemical into a well, comprising:
- a pressure vessel for containing the chemical, wherein said pressure vessel is closed to atmospheric pressure;
- an outlet attached to said pressure vessel for permitting the chemical to exit said pressure vessel;
- a valve in fluid communication with said outlet for selectively controlling the flow of chemical from said pressure vessel;
- a pressure regulator in fluid communication with said chemical downstream of said outlet for controlling the pressure of the chemical;
- and
- a pressurized gas located in said pressure vessel, wherein the pressure exerted by said pressurized gas caused the chemical to flow from said pressure vessel to the well through said pressure regulator and said valve.
An apparatus for selectively injecting a chemical into a well, comprising:
- a pressure vessel for containing the chemical, wherein said pressure vessel is closed to atmospheric pressure;
- an outlet attached to said vessel for permitting the chemical to exit said pressure vessel;
- a first pressure regulator in fluid communication with said outlet for controlling the chemical pressure as the chemical exits the pressure vessel;
- a valve in fluid communication with said first pressure regulator for selectively controlling the flow of the chemical;
- a second pressure regulator in fluid communication with said valve and the well for controlling the chemical pressure as the chemical exits said valve;
- and
- a pressurized gas located in said pressure vessel, wherein the pressure exerted by said pressurized gas causes the chemical to exit said pressure vessel through said outlet and to flow through said first pressure regulator, said valve, said second pressure regulator, and to enter the well.
A method for injecting a chemical into a well, comprising the steps of:
- placing a pressurized gas into a pressure vessel which is closed to atmospheric pressure;
- injecting a quantity of chemical into the pressure vessel so that the pressurized gas exerts a pressure on the chemical;
- operating a valve in fluid communication with the chemical for selectively controlling the flow of fluid from said pressure vessel;
- and
- operating a pressure regulator in fluid communication with the chemical to control the presure of the chemical.
Dependencies are inferred from the claim text.