Well treatment fluid placement tool and methods

Details Well treatment fluid placement tool and methods Well treatment fluid placement tool and methods

1996-12-11

1998-09-08

Suchfield, George A.

Wells

Processes

Placing fluid into the formation

166142, 166185, 166202, 166222, 166386, E21B 2306, E21B 3408, E21B 4312

Patent

active

058031774

ABSTRACT:
The present invention provides a tool and methods of placing a treatment fluid in a subterranean formation penetrated by a well bore by way of selected perforations extending from casing cemented in the well bore into the formation. The fluid placement tool includes a fluid flow passageway extending therethrough, at least one resilient self expandable cup type packer attached thereto and a valve disposed in the fluid flow passageway which closes the passageway when a closing plug is dropped into the tool. The placement tool is capable of releasing the cup type packer whereby it provides a seal between the tool and the casing when a first predetermined fluid pressure is applied to the tool after a closing plug is dropped therein and opening the fluid flow passageway whereby the treatment fluid is discharged from the tool below the packer when the fluid pressure is increased to a second predetermined fluid pressure. Methods of using the tool are also provided.

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