Apparatus and method for stimulating multiple production zones in a wellbore
Patent 6006838 Issued on December 28, 1999. Estimated Expiration Date: 
October 12, 2018. 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.
October 12, 2018. 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 References 2327051 2997108 3912173 Well system Perforation cleaning tool Fluidic oscillator Pressure operated valve Perforation cleaning tools Method and apparatus for erosive stimulation of open hole formations Surface switchable down-jet/side-jet apparatus Patent #: 5533571 InventorsAssigneeApplicationNo. 169910 filed on 10/12/1998US Classes:166/306, Fluid enters and leaves well at spaced zones166/318Operated by dropped elementExaminersPrimary: Neuder, William P.Assistant: Kreck, John Attorney, Agent or FirmInternational ClassE21B 043/25AbstractAn apparatus and method for selectively stimulating a plurality of producing zones of an openhole wellbore in oil and gas wells in one trip. The assembly includes a plurality of modules connected in a tailpipe wherein the modules can be selectively actuated to conduct a matrix acidizing job and near wellbore erosion job on producing zones of interest in the wellbore. Each module includes a sleeve shiftable between a closed position and a treating position where a plurality of jet passageways are exposed to the central passageway of the assembly. | |
