Patents by Inventor Radovan Tepavac

Radovan Tepavac 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).

  • Multi-function sub for use with casing running string
    Patent number: 8240371
    Abstract: A multi-function sub is connected between a top drive of a drilling rig and a casing gripper. The sub has telescoping upper and lower members that rotate with each other. A sleeve is mounted to one of the members. That sleeve is prevented from rotation with the upper and lower members by an anti-rotation device. A piston is located on the other member and reciprocally carried within the sleeve. An external pump is connected to the sleeve for supplying pressurized fluid into the sleeve to act against the piston. This fluid provides compensation for thread makeup when a new joint of casing is being secured to a string of casing.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: August 14, 2012
    Assignee: Tesco Corporation
    Inventors: Radovan Tepavac, Milo Markovic
  • Multi-Function Sub for Use With Casing Running String
    Publication number: 20100314100
    Abstract: A multi-function sub is connected between a top drive of a drilling rig and a casing gripper. The sub has telescoping upper and lower members that rotate with each other. A sleeve is mounted to one of the members. That sleeve is prevented from rotation with the upper and lower members by an anti-rotation device. A piston is located on the other member and reciprocally carried within the sleeve. An external pump is connected to the sleeve for supplying pressurized fluid into the sleeve to act against the piston. This fluid provides compensation for thread makeup when a new joint of casing is being secured to a string of casing.
    Type: Application
    Filed: June 15, 2009
    Publication date: December 16, 2010
    Applicant: Tesco Corporation
    Inventors: Radovan Tepavac, Milo Markovic
  • Casing stabbing guide
    Patent number: 7832487
    Abstract: A stabbing guide connects to a casing collar during makeup. The stabbing guide has a housing with a lower portion with a cylindrical interior and an upper portion with a conical interior. Upper and lower shoulders are located in the cylindrical interior, defining an annular recess between the shoulders. Each of the shoulders has an inner diameter smaller than an outer diameter of the casing collar. The housing is formed in separate segments and secured around the casing collar by a clamp.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: November 16, 2010
    Assignee: Tesco Corporation
    Inventors: Kenneth C. Jensen, Radovan Tepavac, Milan Cerovsek
  • Casing Stabbing Guide
    Publication number: 20090242192
    Abstract: A stabbing guide connects to a casing collar during makeup. The stabbing guide has a housing with a lower portion with a cylindrical interior and an upper portion with a conical interior. Upper and lower shoulders are located in the cylindrical interior, defining an annular recess between the shoulders. Each of the shoulders has an inner diameter smaller than an outer diameter of the casing collar. The housing is formed in separate segments and secured around the casing collar by a clamp.
    Type: Application
    Filed: April 1, 2008
    Publication date: October 1, 2009
    Applicant: Tesco Corporation
    Inventors: Kenneth C. Jensen, Radovan Tepavac, Milan Cerovsek