Patents by Inventor Billy Walton McArthur

Billy Walton McArthur 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).

  • Borehole pressure measurement apparatus having a high pressure float valve
    Patent number: 4018088
    Abstract: Borehole pressure is measured with an open-ended chamber positioned in the borehole and in fluid communication with a surface pressure source through a microtube. The chamber contains a ball float that seats in the upper end of the chamber to seal the microtube to entry of borehole fluids. The ball is made of a material having a density greater than that of the borehole fluids in order that the float can withstand high pressures. Partial support to compensate for the high density material of the float is provided by a spring attached between the chamber and the float ball.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: April 19, 1977
    Assignee: Sperry-Sun Well Surveying Company
    Inventor: Billy Walton McArthur