Cement heating tool for oil and gas well completion
AssigneeHomer L. Spencer
InventorThomas A. Larovere
Life of this patent
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Abstract
Apparatus and method for setting cement in the annulus of an oil or gas well during well completion or other similar well operations. An induction heating tool is lowered to a desired position within the well casing and power is supplied to the tool to heat the casing and the cement which has been injected in the annulus adjacent the heated well casing and the wellbore.
Claims4
A tool for increasing the temperature of cement surrounding well casing in an oil or gas well, said tool being an inductive type tool applying a predetermined temperature to said casing and said cement, said temperature of said casing being monitored and controlled during said temperature increasing operation of said tool.
A method of operating a well tool of the induction type during the cementing operations while drilling an oil or gas well, said method comprising lowering said well tool from the surface where said drilling is taking place to a predetermined depth from said surface within said well and adjacent cement surrounding said casing at said predetermined depth, said well tool heating said cement surrounding said casing for a predetermined time period to a predetermined temperature, said time period and said temperature being monitored from said surface.
Method of melting electrically conductive material surrounding the casing of an oil or gas well with an electromagnetic induction tool comprising providing said electrically conductive material around the circumference of said tool and inducing electromagnetic induction from said tool into said material, raising the temperature of said material to a value sufficient to melt said material.
Apparatus for melting electrically conductive material in the annulus of an oil or gas well comprising an electromagnetic induction tool, a power supply to supply power to said tool and material operable to surround the circumference of said tool, said material being an electrically conductive material forming a closed loop surrounding said circumference.
Dependencies are inferred from the claim text.