Patents by Inventor Lance RACCA

Lance RACCA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Chemical injection valve with stem bypass flow
    Patent number: 11255157
    Abstract: A chemical injection valve can include a valve stem, flow between sections of a flow passage being prevented and permitted in respective closed and open positions of the valve stem, a resilient primary seal that prevents flow through an annular gap surrounding the valve stem in the closed position, and a bypass passage in communication with the annular gap and a flow passage section, and in communication with another flow passage section in the open position. A chemical injection system can include a chemical treatment pumped through a chemical injection valve and into an interior of a tubular string, and the chemical injection valve including a valve stem and a bypass passage extending between a flow passage section and an annulus surrounding the valve stem, the annulus being positioned longitudinally between a resilient primary seal and a metal secondary seal.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: February 22, 2022
    Assignee: Weatherford Technology Holdings, LLC
    Inventors: Zlatko X. Salihbegovic, Lance Racca, Donald M. King
  • CHEMICAL INJECTION VALVE WITH STEM BYPASS FLOW
    Publication number: 20180142532
    Abstract: A chemical injection valve can include a valve stem, flow between sections of a flow passage being prevented and permitted in respective closed and open positions of the valve stem, a resilient primary seal that prevents flow through an annular gap surrounding the valve stem in the closed position, and a bypass passage in communication with the annular gap and a flow passage section, and in communication with another flow passage section in the open position. A chemical injection system can include a chemical treatment pumped through a chemical injection valve and into an interior of a tubular string, and the chemical injection valve including a valve stem and a bypass passage extending between a flow passage section and an annulus surrounding the valve stem, the annulus being positioned longitudinally between a resilient primary seal and a metal secondary seal.
    Type: Application
    Filed: October 31, 2017
    Publication date: May 24, 2018
    Inventors: Zlatko X. SALIHBEGOVIC, Lance RACCA, Donald M. KING