Downhole cleaning apparatus
AssigneePaul Bernard Lee
InventorsPaul Bernard Lee, Dayln Beazer
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Abstract
An apparatus for cleaning the area around a casing of a wellbore is described. The apparatus comprises a body configured to be located in a wellbore casing, the body defining an internal chamber for receipt of pressurised fluid. Pistons are mounted in the body and is arranged to move from an inwardly retracted condition to an outwardly deployed condition as a result of an increase in fluid pressure in the internal chamber. Pistons further comprise at least one first nozzle arranged to direct a jet of pressurised fluid from the apparatus.
Claims16
An apparatus for cleaning the area around a wellbore casing, the apparatus comprising:
- a body configured to be located in a casing disposed in a wellbore, the body defining an internal chamber for receipt of pressurised fluid;
- at least one piston mounted to the body and being moveable from an inwardly retracted condition to the outwardly deployed condition as a result of an increase in fluid pressure in the internal chamber, such that a predetermined pressure differential between the internal chamber and the outside of the apparatus moves said at least one piston to the outwardly deployed condition;
- and
- wherein said at least one piston further comprises an impact surface arranged to slidably engage the internal surface of a perforated casing in use and impart vibrations to said casing when the apparatus is rotated in the wellbore and the impact surface slides along said internal surface of said perforated casing.
An apparatus for cleaning the area around a wellbore casing, the apparatus comprising:
- a body configured to be located in a casing disposed in a wellbore, the body defining an internal chamber for receipt of pressurised fluid;
- at least one contact member mounted to the body and being moveable in and out of the body, wherein said at least one contact member is urged by spring means towards an outwardly deployed condition to engage the casing, said at least one contact member further comprising an impact surface arranged to slidably engage the internal surface of a perforated casing in use and impart vibrations to said casing when the apparatus is rotated in the wellbore and the impact surface slides along said internal surface of said perforated casing;
- and
- at least one nozzle arranged to direct a jet of pressurised fluid from the internal chamber out of the apparatus.
Dependencies are inferred from the claim text.