Patents by Inventor Otkrytoe Aktsionernoe Obschestvo "Tatneft" IM. V

Otkrytoe Aktsionernoe Obschestvo "Tatneft" IM. V 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).

  • Publication number: 20130319653
    Abstract: A wedge deflecting device useful in drilling and workover operations on oil and gas wells. The device includes a cutting tool connected to the upper portion of the wedge by means of the shear element provided with an external circular groove, located below the wedge deflecting surface, and with a transverse slot in its upper part, the cutting tool having a longitudinal cylinder and a downwards spring-biased piston, inserted into the cylinder; above lower seal elements and below the spring the piston has a wedge nose which corresponds to a transverse slot of the shear element. Below the piston, the cylinder communicates with the drill string and the supply tube, and above-the-piston space communicates with the borehole interior. The cutting tool is provided with a radial inward spring-biased locking element, arranged to be able to fix the piston in its top position, where the piston is located above the shear element.
    Type: Application
    Filed: November 20, 2012
    Publication date: December 5, 2013
    Applicant: OTKRYTOE AKTSIONERNOE OBSCHESTVO "TATNEFT" IM. V.D.SHASHINA
    Inventor: Otkrytoe Aktsionernoe Obschestvo "Tatneft" IM. V