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Saltwater and hard water bentonite mud

  • US 4,500,436 A
  • Filed: 09/20/1982
  • Issued: 02/19/1985
  • Est. Priority Date: 10/17/1980
  • Status: Expired due to Fees
First Claim
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1. A process for preparing a drilling mud comprising:

  • (a) measuring a quantity of water selected from the group consisting of saltwater and hard water sufficient to hydrate the mud;

    (b) adding a caustic agent to the water of step (a) in an amount sufficient to product a pH in the prepared mud between about 8 and about 12;

    (c) adding a filtration control agent to the mixture of step (b); and

    (d) adding bentonite to the mixture of step (c) in a quantity sufficient to achieve the desired viscosity.

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