| 摘要 |
A wellbore isolation device comprises: a first layer, wherein the first layer: (A) comprises a first material; and (B) defines a cavity containing a dissolution medium, wherein a chemical reaction of at least the dissolution medium causes at least a portion of the first material to dissolve. A method of removing the wellbore isolation device comprises: introducing the wellbore isolation device containing the dissolution medium into the wellbore; and allowing the chemical reaction to occur. A wellbore isolation device comprises: a first layer, wherein the first layer: (A) comprises a first material; and (B) defines a cavity containing a dissolution medium, wherein a chemical reaction of at least the dissolution medium causes at least a portion of the first material to dissolve. A method of removing the wellbore isolation device comprises: introducing the wellbore isolation device containing the dissolution medium into the wellbore; and allowing the chemical reaction to occur. A lowest rate on a multi-night lodging stay is achieved by obtaining lodging rate information for a first lodging location from a plurality of lodging rate sources. The information is correlated with each night of a window during which a consumer is available to travel. A block of nights within the window having the lowest lodging rate is identified. Then, a plurality of lodging reservations corresponding to the identified block are generated, wherein at least two of the lodging reservations correspond to different nights of the multi-night lodging stay and are placed through different lodging reservation systems. A block having the lowest total cost of travel can also be identified by considering the cost of other travel related expenses in conjunction with the lodging rate for the block. |
