Charge tube end plate

a technology of end plates and end plates, applied in the direction of explosive charges, fluid removal, borehole/well accessories, etc., can solve the problems of poorly fractured formation, damage to the tubing or casing, and often undetected misalignmen

Inactive Publication Date: 2007-04-19
NEVES JOHN ANTHONY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] It is an object of the present invention to obviate or mitiga...

Problems solved by technology

Due to the large size and weight of each component to be assembled (charge tube, perforating charges, and gun barrel), proper alignment of components during assembly is critical, however misalignment can often go undetected due to shearing of the aluminum alignment mechanism during accidental misassembly.
Misalignment of a charge tube within the gun barrel may cause gun failure, resulting in a poorly fractured formation which may or may not be detected, or damage to the tubing or casing.
Moreover, if the formation is poorly fractured, and reperforation is an option, it may be difficult, if not impossible, to retrieve the now misshapen gun components from their downhole location (in a worst case scenario).
Due to the minimal threading depth, the depth of the alignment slot is limited, whi...

Method used

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Embodiment Construction

[0024] Generally, the present invention provides a method and apparatus for assembling and loading perforating guns for downhole use. In particular, the present invention provides an end plate that can be produced at minimal cost, and that will prevent misalignment when used with one of a number of charge barrels of different design diameters for different applications.

[0025] With reference to FIG. 1, a perforating gun is shown during assembly. A plate member in the form of end plate 10 is attachable to the assembled charge tube 20, preferably by welding, which is slid into the perforating gun barrel 30. It is critical for proper operation that the charge tube 20 be properly substantially aligned in the perforating gun barrel 30 to line up the charges 21 with the weakened or scalloped portions 32 of the perforating gun barrel 30. The end plate 10, therefore, includes an alignment system in the form of alignment tab 11, and the perforating gun barrel 30 includes an alignment groove ...

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PUM

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Abstract

An end plate for securing and orienting a charge tube within a downhole-perforating gun. The end plate includes apertures for receiving locating tabs on the end of the charge tube to ensure the end plate is affixed to the charge tube in a specific orientation. The end plate includes an alignment tab that mates with a corresponding alignment groove in the perforating gun barrel for ensuring insertion of the charge tube into the perforating gun barrel in correct orientation to ensure the perforating charges exit through pre-designed scallops in the perforating gun barrel. A series of apertures may be present within the end plate to allow usage with one of a variety of sizes of charge tube. The end plate may include manipulation spaces along the circumference of the end plate to allow the end plate to be properly positioned or retrieved. The end plate may include an attachment system for attachment of an initiating device.

Description

FIELD OF THE INVENTION [0001] The present invention relates generally to well perforation tools. More particularly, the present invention relates to an end plate for securing a charge tube within the barrel of a perforating gun. More particularly, the present invention relates to an end plate for securing a charge tube within the barrel of a perforating gun having an attachment system for an initiating device. BACKGROUND OF THE INVENTION [0002] During the production life of an oil or gas well, it often becomes necessary to perforate the well casing and cement liner of the well in order to obtain access to further deposits within the formation. Several technologies have been developed for this purpose, including the use of downhole explosives, which are generally shaped charges placed and targeted to perforate the casing at a specific well depth and in a specific pattern. Generally, a “gun” containing a series of tailored shaped explosive charges, and a firing head are either run on ...

Claims

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Application Information

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IPC IPC(8): F42B1/00
CPCE21B43/119F42D1/22
Inventor NEVES, JOHN ANTHONY
Owner NEVES JOHN ANTHONY
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