Patents Examined by Bryan A Fuller
  • Patent number: 6978838
    Abstract: A method is given for completing an interval of an open-hole injection well penetrating a subterranean formation when the interface between the wellbore and the formation includes a zone invaded by a filter cake that includes bridging materials and other embedded solid materials. The method includes the steps of injecting a clean-up fluid and contacting it with the filtercake for a period of time sufficient to loosen some of the other solids embedded in the filter cake; removing the loosened solids by a high-rate displacement fluid containing suspending additives; and then injecting a dissolving fluid containing a diverter and an effective amount of a salt or acid capable of dissolving the bridging material.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: December 27, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Mehmet Parlar, Mark Brady, Liz Morris