Patents Represented by Attorney, Agent or Law Firm H. Dennis Kelly
  • Elevator/spider with counterbalance
    Patent number: 4550942
    Abstract: An elevator/spider having a series of slips in a tapered bowl and a yoke for pivotally setting slips, a torsion spring is mounted on the body of the elevator/spider. A wire rope connects the torsional spring to the yoke, so that the weight of the slips is counterbalanced by the force of the torsional spring.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: November 5, 1985
    Assignee: Hughes Tool Company
    Inventor: Gunnar H. Berg
  • Air groove scraper
    Patent number: 4515228
    Abstract: An earth boring rock bit having a sealed bearing with air or gas as the circulating medium. An annular groove is formed in the vicinity of the seal and connected to the interior of the bit for cooling the seal and cleaning debris from the area of the seal. An air groove scraper is mounted on the shaft in the exit port of the annular groove to prevent the annular groove from becoming plugged by debris mixing with moisture in the hole.
    Type: Grant
    Filed: November 28, 1983
    Date of Patent: May 7, 1985
    Assignee: Hughes Tool Company - USA
    Inventors: George E. Dolezal, Joseph L. Kelly, Jr.
  • Clamping assembly
    Patent number: 4507843
    Abstract: A method and a clamping assembly for securing rock bit sections during welding. The assembly has a chuck jaw that is supported by metal rods, which give the assembly enough resiliency to conform to the shape of the rock bit and which keep the chuck jaw parallel to the base so that the point of engagement between the chuck jaw and the rock bit section remains constant.
    Type: Grant
    Filed: December 10, 1982
    Date of Patent: April 2, 1985
    Assignee: Hughes Tool Company
    Inventor: Gerald O. Atkinson
  • Method and apparatus for monitoring the corrosive effects of well fluids
    Patent number: 4501323
    Abstract: A method and an apparatus for monitoring corrosive effects of fluids downhole in an oil or gas well. A side pocket mandrel is installed in the well tubing string at a depth at which monitoring is desired. Coupons of a selected material are mounted in a carrier, which is placed in the side pocket of the mandrel. Ports and passages allow casing fluid or tubing fluid to communicate with various coupons. The carrier is then removed from the well and the coupons are inspected.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: February 26, 1985
    Assignee: Hughes Tool Company
    Inventors: F. Glenn Lively, Kenneth O. Robison