Coal slag solidification of drilling fluid
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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Abstract
Drilling fluid is solidified by the incorporation therein of coal slag. In a preferred embodiment lime is also incorporated into said drilling fluid and/or said drilling fluid is a lime drilling fluid. Thus, there is provided a cementitious composition comprising drilling fluid, coal slag and, generally, lime.
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Citations
13 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification