Patent ID: 11879305
Assignee: CONOCOPHILLIPS COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 4:
5. A method of cementing an annulus exterior to a perforated region of casing in an oil or gas well to be abandoned, the method comprising:
a. delivering to the perforated region a cementing tool comprising: a generally cylindrical body with an interior void; at least one nozzle aperture formed in the body for passing cement from the interior void to an exterior of the body; the body, or portion of it that has said at least one nozzle aperture formed therein, having a selectively adjustable outer diameter;
b. increasing the outer diameter of the body or the adjustable portion thereof to a pre-set maximum diameter less than the diameter of the casing so as to reduce the size of an annular region between the tool and the casing; and
c. delivering cement from the cementing tool into the annular region between the tool and the casing and then through perforations in the casing and into the exterior annulus.