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US 6,695,058 B1Granted
Method and apparatus for cleaning boreholes
AssigneeQuartech Engineering Limited
InventorClive French
Life of this patent
Estimating the term…
Abstract
A method of cleaning a casing-lined borehole comprises the steps of: circulating fluid in the borehole to entrain material in the circulating fluid; separating the entrained material from the fluid within the borehole; and then removing the separated material from the borehole.
Claims26
A method of cleaning a casing-lined borehole, the method comprising the steps of:
- running a tool into the borehole carrying a rotatable cutting member and rotating the cutting member to dislodge material from the wall of the borehole;
- rotating an impeller in the tool to circulate fluid in the borehole, to entrain the dislodged material in the fluid and to circulate the fluid through the tool;
- separating the entrained material from the fluid within the borehole;
- and
- removing the separated material from the borehole.
2 more elements
Apparatus for use in removing material from a borehole, the apparatus comprising:
- a rotatable cutting member which is rotated to dislodge material adhered to the wall of the borehole;
- a rotatable impeller for circulating fluid in the borehole, to entrain the dislodged material in the fluid and to circulate the fluid through the apparatus;
- and
- separating means for separating the entrained material from the fluid within the borehole.
1 more element
Dependencies are inferred from the claim text.