US 11,879,305 B2
Behind casing cementing tool
Lars Hovda, Tananger (NO); James C. Stevens, Houston, TX (US); Dan Mueller, Houston, TX (US); Amal Phadke, Houston, TX (US); and Praveen Gonuguntla, San Antonio, TX (US)
Assigned to CONOCOPHILLIPS COMPANY, Houston, TX (US)
Filed by CONOCOPHILLIPS COMPANY, Houston, TX (US)
Filed on Aug. 19, 2021, as Appl. No. 17/406,969.
Claims priority of provisional application 63/112,427, filed on Nov. 11, 2020.
Claims priority of provisional application 63/112,448, filed on Nov. 11, 2020.
Claims priority of provisional application 63/112,440, filed on Nov. 11, 2020.
Claims priority of provisional application 63/067,599, filed on Aug. 19, 2020.
Prior Publication US 2022/0056783 A1, Feb. 24, 2022
Int. Cl. E21B 33/14 (2006.01); E21B 41/00 (2006.01); E21B 37/00 (2006.01); E21B 33/13 (2006.01)
CPC E21B 33/14 (2013.01) [E21B 33/13 (2013.01); E21B 37/00 (2013.01); E21B 41/0078 (2013.01)] 10 Claims
OG exemplary drawing
 
1. 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 body in which at least one nozzle aperture is formed, the tool being delivered in a first configuration in which the body has a first outer diameter;
b. reconfiguring the tool such that the body has a second, larger, outer diameter, wherein the degree of expansion of the tool is limited such that the tool is designed to expand to a pre-set maximum diameter less than the diameter of the casing when pressurized so as to reduce the size of an annular region between the tool and the casing; and
c. delivering cement through the said at least one nozzle aperture into the annular region between the tool and the casing and then through perforations in the casing and into the exterior annulus.