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OFFSHORE WELL RIG

  • US 3,802,137 A
  • Filed: 04/03/1972
  • Issued: 04/09/1974
  • Est. Priority Date: 04/03/1972
  • Status: Expired due to Term
First Claim
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1. A rig comprising a lower support structure, an upper base structure on said support structure, a mast, drawworks and power source on said base structure, a plurality of C-clamps holding said base structure to said support structure, and solid handrails connected to a drip pan substantially covering the bottom of said base, whereby spillage can be controlled.

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