Apparatus for removal of milling debris
Patent 6276452 Issued on August 21, 2001. Estimated Expiration Date: 
November 5, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 5, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 434665 filed on 11/05/1999US Classes:166/298, Perforating, weakening or separating by mechanical means or abrasive fluid166/55.1, With disparate below ground feature166/55.6, Cutter rotates circumferentially of pipe166/99, WITH JUNK RETRIEVING MEANS166/107, Receptacles166/312, Liquid introduced from well top166/376, Destroying or dissolving well part175/312Sieve or strainerExaminersPrimary: Suchfield, George A.Attorney, Agent or FirmForeign Patent References
International ClassesE21B 029/00E21B 031/08 E21B 037/00 AbstractAn apparatus and method for drawing small milling debris into a combination milling and debris retrieval tool, during the performance of the milling operation. A milling tool has a fluid intake port near its lower end, where debris-laden fluid is drawn into the milling tool and subsequently into a separator section. The separator section has a debris deflection tube and a screen for separating the debris from the fluid. Fluid is drawn into the tool by either a set of eductor nozzles or a downhole motor and pump.Other References
Field of SearchWith disparate below ground featureCutter rotates circumferentially of pipe WITH JUNK RETRIEVING MEANS Having sediment trap or deflector In pump discharge flow path Receptacles Detachable wash pipe Lateral ports used in well WHIRLING OR LATERAL DISCHARGE OR PROJECTABLE NOZZLES Perforating, weakening or separating by mechanical means or abrasive fluid Cleaning or unloading well Liquid introduced from well top Destroying or dissolving well part WITH RECEPTACLE Sieve or strainer WITH WELL-TYPE SCREEN | |
