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Reliable cap break signal for downhole setting tools

IP.com Disclosure Number: IPCOM000248774D
Publication Date: 2017-Jan-09
Document File: 1 page(s) / 45K

Publishing Venue

The IP.com Prior Art Database

Abstract

A new cap break signal system is proposed for wireline deployed downhole setting tools. This system provides a cap break signal once the tool is set. This system could replace the existing unreliable cap break system that provides a cap break signal when the resistor inside the primary igniter breaks, without providing information on the setting of the tool.

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Reliable cap break signal for downhole setting tools

Abstract: A new cap break signal system is proposed for wireline deployed downhole setting tools. This system provides a cap break signal once the tool is set. This system could replace the existing unreliable cap break system that provides a cap break signal when the resistor inside the primary igniter breaks, without providing information on the setting of the tool.

Figure 1. Schematic of the proposed new cap break signal system for wireline deployed downhole setting tools

Description (Please refer to Figure 1): A controller circuit is connected to the main power supply line that feeds the primary igniter. The controller circuit is closed by a wire-connect (a male and a female connects) held together by loose (extendable) wire. When the wire-connect disconnects, a signal is sent by the controller circuit to the main power line. This signal is the “new cap break signal”.

One of male or female connect is physically (not electrically) bound to the part of the “piston” inside the tool that moves as the power charge burns to release gas and create pressure. The other male or female connect is physically (not electrically) bound to a fixed, immovable part of the tool. As the piston moves to set the tool, the wire-connect is disconnected to provide the “new cap break signal”.

Advantages of this invention:

1.       Ease of implementation: This system is a retrofit to the existing system. It does not require overhaul of the...