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Low lift, elevatable high floor drilling mast and substructure arrangement therefor

  • US 4,221,088 A
  • Filed: 01/02/1979
  • Issued: 09/09/1980
  • Est. Priority Date: 01/02/1979
  • Status: Expired due to Term
First Claim
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1. A low lift, high floor drilling mast and substructure arrangement therefor comprising:

  • a. base means for resting on the earth'"'"'s surface;

    b. drilling mast support means pivotally connected to said base means;

    c. setback tower means pivotally connected to said drilling mast support means and to said base means;

    d. elevatable drawworks support means pivotally mounted on said base means;

    e. drilling mast means secured to said mast support means; and

    f. lifting frame means connected to said drilling mast support means whereby said drilling mast means, support means therefor and setback tower means may be simultaneously elevated from a reclined position to an upright position on said base means.

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