DOWNHOLE FLUID TREATMENT TOOL

摘要

A treatment device and method for use in delivering fluid treatment to a wellbore is described. The device includes a first treatment housing and a second treatment housing, mounted along a tubing string, each of the first and second housing defining a fluid pathway which is continuous with the tubing string and each of the first and second treatment housing defining a port for fluid communication between the tubing string and the wellbore. Fluid flow through the first housing may be selectively blocked by delivery of a deformable ball to the tubing string to seal against a ball seat disposed between the first and second housing. While the first pathway is blocked, fluid may be selectively delivered to the wellbore through the port on the second treatment housing. The ball may be removed from the ball seat by application of hydraulic pressure in excess of the deformation threshold of the ball, forcing the ball to deform and pass through the seat, re-opening the fluid flow through the first treatment housing and allowing for treatment through port defined in the first housing.