Chemically enhanced drilling methods
AssigneeBJ Services Company
InventorsPhilip J. Rae, Gino F. Di Lullo Arias, Lance N. Portman
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Abstract
Methods and materials for chemically enhanced drilling of oil/gas wells are disclosed. The use of drilling fluids containing chemicals that dissolve formation constituents results in the creation of boreholes. Fluids containing acids such as hydrochloric acid, formic acid, acetic acid, or combinations thereof have been found to be especially useful in chemical drilling of formations containing basic minerals such as calcium carbonate. The use of acid has the further advantage of simultaneously stimulating the borehole.
Claims49
A method for drilling a borehole, the method comprising:
- pumping a fluid through a pipe located in a downhole formation;
- jetting the fluid through at least one nozzle connected to the end of the pipe;
- and
- dissolving the formation constituent near the nozzle to produce a borehole;
- wherein the fluid comprises a chemical that dissolves the formation constituent.
An apparatus for use in chemical drilling to dissolve boreholes, the apparatus comprising:
- a container for holding a fluid comprising a chemical that dissolves a downhole formation constituent;
- a fluid pump connected to the container;
- and
- a pipe placed in a downhole formation, the pipe having a first end connected to the fluid pump, and a second end connected to at least one nozzle.
Dependencies are inferred from the claim text.