The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2019
Filed:
Oct. 12, 2015
Halliburton Energy Services, Inc., Houston, TX (US);
Lorenzzo Breda Minassa, Tomball, TX (US);
HALLIBURTON ENERGY SERVICES, INC., Houston, TX (US);
Abstract
An auto-shut-in valve in a chemical injection valve is described for operation at a downhole location in a wellbore. The chemical injection valve includes a closure member that is maintained in an open position by fluid pressure in a chemical supply line such that diminishment of the fluid pressure in the chemical supply line automatically causes the closure member to move to a closed position. A first mating surface on the closure member is exposed to the fluid pressure in the chemical supply line when the closure member is in the open position, and defines a portion of an equivalent differential surface to which the fluid pressure is exposed to maintain the closure member in the open position. The first mating surface is isolated from the fluid pressure in the chemical supply line when the closure member is in the closed position.