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Coal slag solidification of drilling fluid

  • US 5,439,056 A
  • Filed: 06/28/1993
  • Issued: 08/08/1995
  • Est. Priority Date: 06/28/1993
  • Status: Expired due to Term
First Claim
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1. A method for solidifying a drilling fluid in a borehole, said drilling fluid being a lime mud or a non-lime mud which is converted to a lime mud by addition of lime, comprising:

  • admixing coal slag with said drilling fluid to produce a cementitious slurry;

    displacing said cementitious slurry into said borehole; and

    allowing said cementitious slurry to solidify in situ.

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