Patents Assigned to Top-Co Industries Ltd.
  • Method for locating a drill bit when drilling out cementing equipment from a wellbore
    Patent number: 6302205
    Abstract: A method for locating a drill bit when drilling out cementing equipment from a casing of a wellbore. A first step involves placing in the casing of the wellbore at the time of placing cementing equipment, at least one coloured marker member. A second step involves monitoring cuttings during drilling for traces of colour. Penetration of a drill bit into the cementing equipment is indicated by coloured cuttings from the at least one coloured marker member.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: October 16, 2001
    Assignee: Top-Co Industries Ltd.
    Inventor: Robert Lawrence Ryll
  • Cementing plug
    Patent number: 6237686
    Abstract: A cementing plug has a plurality of body segments which are secured together, preferably by adhesive, to form a plug body. Elastomer wipers are clamped between the body segments. This cementing plug may be readily made shorter or longer in length with an increased or decreased number of wipers. Elastomer covers only the wipers and not the plug body.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: May 29, 2001
    Assignee: Top-Co Industries Ltd.
    Inventors: Robert Lawrence Ryll, Colin George Reid