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Flexible Cable Head Housing

IP.com Disclosure Number: IPCOM000167313D
Publication Date: 2008-Feb-07
Document File: 4 page(s) / 46K

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention is a Housing for a Cable Head that utilizes a resilient housing to alleviate the shock during perforating operations that could influence the unintended failure of a tensile weak point.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 53% of the total text.

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Introduction

This invention addresses issues that are present in Cable Heads that are used for perforating. Such a Cable Head utilizes a weak point that fails in tension to enable the separation of the cable from the tool below at a preferred tension value and specific disconnection point. A solid weak point is subject to weakening due to shock fatigue so therefore a flexible weak point has been designed, made from cable. While there are some of these released for use in the field, it has been difficult to design and qualify flexible weak points of the lower strength values needed. And finally, it is difficult to offer as broad a range of tensile values such as are possible by employing solid weak points. An opportunity for an invention has been provided, and this is to design the flexibility into the housing of the Cable Head, the purpose of which is to alleviate the shock fatigue, and thereby enable using solid weak points again.

Summary of the Invention

The invention is a Housing for a Cable Head that utilizes a resilient housing to alleviate the shock during perforating operations that could influence the unintended failure of a tensile weak point.

Advantages: Shock fatigue of the weak point is alleviated. The weak point itself can be "solid" rather than flexible, simplifying manufacturing. The weak point strength is varied by choosing the undercut diameter of the part thereby allow for a greater range of values.

The elements of the design are: 1. The outer portion of the Housing that is in tension due to the weight of the tool below is equipped with a pair of helical slots formed in opposing directions and fastened so to prevent the conversion of the tension into torque; 2. The inner portion of the Housing that is in compression due to the weight of the tool below is crafted in a similar fashion.

Detailed Description of the Invention

The Invention will be described below in the manner in which the housing is constructed.

1. Construction Method of the Tension Member

The Tension Member of the Housing As...