Patents by Inventor Abdel-Rahman Mahmoud

Abdel-Rahman Mahmoud 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).

  • Compliant dart-style reverse-flow check valve
    Patent number: 9273541
    Abstract: An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: March 1, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Abdel-Rahman Mahmoud, Kevin T Scarsdale
  • Compliant Dart-Style Reverse-Flow Check Valve
    Publication number: 20150047851
    Abstract: An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members.
    Type: Application
    Filed: October 23, 2014
    Publication date: February 19, 2015
    Inventors: Abdel-Rahman Mahmoud, Kevin T. Scarsdale
  • Compliant dart-style reverse-flow check valve
    Patent number: 8919446
    Abstract: An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: December 30, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Abdel-Rahman Mahmoud, Kevin T. Scarsdale
  • Compliant Dart-Style Reverse-Flow Check Valve
    Publication number: 20140034326
    Abstract: An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members.
    Type: Application
    Filed: July 29, 2013
    Publication date: February 6, 2014
    Applicant: Schlumberger Technology Corporation
    Inventors: Abdel-Rahman Mahmoud, Kevin T. Scarsdale
  • Compliant dart-style reverse-flow check valve
    Patent number: 8561703
    Abstract: An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: October 22, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Abdel-Rahman Mahmoud, Kevin T. Scarsdale
  • COMPLIANT DART-STYLE REVERSE-FLOW CHECK VALVE
    Publication number: 20100319924
    Abstract: An apparatus usable with a well includes a gas lift valve having a check valve arrangement located between an annulus and a passageway of a tubing. The check valve arrangement is adapted to selectively allow fluid flow from the check valve arrangement from an inlet side of the check valve arrangement to an outlet side of the check valve arrangement, and is biased to prevent a leakage flow through the check valve arrangement from the outlet side to the inlet side. The check valve arrangement is defined by a valve element movable into and out of engagement with a valve seat wherein one of the valve element and the valve seat has a first sealing structure engageable with a second sealing structure on the other of the valve element and the valve seat. At least one of the first and second sealing surfaces include at least one pair of sealing members.
    Type: Application
    Filed: June 11, 2010
    Publication date: December 23, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Abdel-Rahman Mahmoud, Kevin T. Scarsdale