Patents Assigned to International Oil Tools, Inc.
  • Indexing tool for use in earth borehole drilling and testing
    Patent number: 4256179
    Abstract: An index mandrel body, which connects with a well string in a borehole, is received by a tubular body have a plurality of splines, which slidably engage teeth on an indexing sleeve rigidly affixed inside the mandrel said splines receiving seatable lands rigidly affixed inside the tubular body, said lands being so spaced as to be able to pass between the splines so that the body becomes fully rotatable, said invention being adaptable for use in compression or tension application to off shore drilling, as well as on land drilling.
    Type: Grant
    Filed: October 15, 1979
    Date of Patent: March 17, 1981
    Assignee: International Oil Tools, Inc.
    Inventor: Harold E. Shillander