Patents by Inventor Arnoldus Achterberg

Arnoldus Achterberg 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).

  • Process and equipment for determining the density of a loaded drilling fluid from a deep well, in particular an oil well
    Patent number: 4201082
    Abstract: Process and apparatus for determining the density of oil well drilling fluid, particularly, the gas content of the fluid. The density of the drilling fluid is determined under a known pressure. The drilling fluid is compressed and the density of the compressed fluid determined. An indication of the gas content derived from the difference between the measured densities.
    Type: Grant
    Filed: May 23, 1978
    Date of Patent: May 6, 1980
    Inventors: Wolfgang Dockhorn, Arnoldus Achterberg