Patents by Inventor Helmut Lechen

Helmut Lechen 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).

  • Use of magneto-resistive sensors for borehole logging
    Patent number: 6647637
    Abstract: A downhole caliper instrument utilizing a linear or arcuate magneto resistive sensor to determine the position of one or more caliper arms which extend from a carrier tool to touch the surface of a borehole wall. A processor and firmware are included to calculate and plot the borehole radius. A plurality of magneto resistive sensors are provided to calculate the sine, cosine and tangent for accurate motion of each independent arm. The magneto resistive sensors sense the position a precise magnetic ruler linked to the caliper arm. The position of the caliper arm determines the radius of the borehole. Calculation of Radius/Diameter is preferably performed in the computer on surface. The downhole controller's firmware controls the multiplexer switching, A/D conversion and other functions.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: November 18, 2003
    Assignee: Baker Hughes Incorporated
    Inventor: Helmut Lechen
  • Use of magneto-resistive sensors for borehole logging
    Patent number: 6560889
    Abstract: A downhole caliper instrument utilizing a magneto resistive sensor to determine the position of a caliper arm which extends to touch the surface of the borehole wall.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: May 13, 2003
    Assignee: Baker Hughes Incorporated
    Inventor: Helmut Lechen
  • Use of magneto-resistive sensors for borehole logging
    Publication number: 20020162240
    Abstract: A downhole caliper instrument utilizing a linear or arcuate magneto resistive sensor to determine the position of one or more caliper arms which extend from a carrier tool to touch the surface of a borehole wall. A processor and firmware are included to calculate and plot the borehole radius. A plurality of magneto resistive sensors are provided to calculate the sine, cosine and tangent for accurate motion of each independent arm. The magneto resistive sensors sense the position a precise magnetic ruler linked to the caliper arm. The position of the caliper arm determines the radius of the borehole. Calculation of Radius/Diameter is preferably performed in the computer on surface. The downhole controller's firmware controls the multiplexer switching, A/D conversion and other functions.
    Type: Application
    Filed: October 29, 2001
    Publication date: November 7, 2002
    Applicant: Baker Hughes Incorporated
    Inventor: Helmut Lechen