Wireless communication between tools

Abstract

The present invention relates to a downhole tool system for being submerged into a casing, comprising at least three tools having a tool axis. Furthermore, the present invention relates to a downhole tool system for being submerged into a casing, comprising at least three tools, and finally the invention relates to communication methods for communicating wirelessly between a first and a third tool separated by a second tool.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a downhole tool system for being submerged into a casing, comprising at least three tools having a tool axis. Furthermore, the present invention relates to a downhole tool system for being submerged into a casing, comprising at least three tools, and finally the invention relates to communication methods for communicating wirelessly between a first and a third tool separated by a second tool.BACKGROUND ART[0002]Communication between surface and a tool in a well via acoustic signals in the well fluid is known. However, well fluid is most often very inhomogeneous as it comprises mud, scales, both oil and water, and gas bubbles. Therefore, the communication sometimes fails.[0003]Sometimes, two operators work together to perform a well operation in the sense that a tool of one operator is arranged between the tools of another operator. However, when this is the case, communication between the tools of the other operator is hin...

AI Technical Summary

Benefits of technology

The present invention provides an improved tool string for communication between two tools separated by an intermediate tool. This is achieved by using ferrites rods or an antenna wound around ferrites rods to increaseinductance without significantly increasing the size of the antenna. The acoustic devices at each end of the intermediate tool are able to send acoustic signals propagating along the housing of the intermediate and second tool, which is often made of a solid material, increasing its transmitting ability compared to the transmitting ability in the surrounding well fluid which may be inhomogeneous and thereby be a poor transmitting media compared to a metal housing.

Problems solved by technology

However, well fluid is most often very inhomogeneous as it comprises mud, scales, both oil and water, and gas bubbles.

However, when this is the case, communication between the tools of the other operator is hindered as these tools are separated by the tool of the one operator, through which communication is not possible.

This is due to the fact that the one operator uses a different communication system than the other operator and that it is not possible to pull wires through the intermediate tool.

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