Mandrel-less Launch Toe Initiation Sleeve (TIS)

摘要

The present invention is a valve tool utilized for hydraulically fracturing multiple zones in an oil and gas well without perforating the cement casing. An oil/gas well completion method involves the use of a valve that is installed as part of the casing string of the well. A mandrel-less casing provides for cement flow within the casing when the valve element is in a closed position and allows for axial flow of fracturing fluid through the cement casing to fracture the formation near the valve when the sleeve is open. The invention disclosed herein is an improved valve used in this process.

主权项

1. A well valve tool for providing a window to the environment around the valve tool, the tool comprising:
a top sub and a bottom sub, wherein said top sub is not connected directly to said bottom sub; an outer sleeve connected between said top sub and said bottom sub having at least one window port; sealing said window port with a burst disc; an inner sleeve connected between said top sub and said bottom sub within said outer sleeve to define an inner passage way selectively preventing fluid communication between an area within said top sub, bottom sub and inner sleeve with said outer sleeve at least one window port.