T-Frac Zone Test Tool and System

Abstract

The present invention is to a tool for testing various zones in a well without having to remove the drill string containing the tool(s) from the well. Each of the individual fracture test tool has an internal passage that can be blocked by a ball bearing to close off the passage. Increased fluid pressure on the internal passage causes a valve body defining the passage to move to open windows in the tool. A collet reset tool is insertable through the passage to pull the valve body back into the run in position to close the windows without requiring the tools be raised to the surface to reset the fracture test tools.

1 . A method of testing fracture zones in a downhole well, comprising:
 providing a zone test tool having an outer housing defining a number of windows;   providing a valve body within said outer housing, said valve body having an internal passage to allow fluid flow through the valve body and said valve body being selectively slidable from a first position to a second position, wherein when said valve body is in a first position the valve body blocks fluid flow from inside the outer housing to an area outside the outer housing, and when said valve body is in said second position, said valve body allows fluid flow from inside the outer housing to an area outside the outer housing;   lowering said a plurality of zone test tools on a drill string in a well bore;   lowering at least one ball bearing within the drill string to a seat on the valve body of a first of said plurality of zone test tools to seal the internal passage of the first zone test tool;   raising the fluid pressure above said first zone test tool whereby fluid pressure acts upon said first zone test tool valve body to cause the valve body to slide from the first valve body position to the second valve body position to open a window of the first zone test tool; using a zone test tool reset tool to reset the zone test tool without substantially raising said zone test tool toward the surface.