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Selectable Segmented Gun System

IP.com Disclosure Number: IPCOM000242355D
Publication Date: 2015-Jul-09
Document File: 2 page(s) / 14K

Publishing Venue

The IP.com Prior Art Database

Abstract

The current Plug and Perf (PNP) strings used in multi-stage hydraulic fracking operations include a stack of several short gun sections above the setting tool; each gun section include few shaped charges and it is fired at a pre-defined depth while pulling out of the hole after the plug has been set. After removing the PNP string the well is then subjected to extreme high pressures to fracture the zones just perforated, before the PNP string for the next stage is rigged up. This invention addressed the most notorious shortcomings of the existing PNP gun configuration by reducing the length of the perforating guns significantly while eliminating the need to manufacture new gun assemblies every time. This new method uses a re-usable circumferentially and/or longitudinally segmented gun assembly, where each segment can be independently selected/fired and re-dressed after removing a purposed-built cover plate. The attached sketch depicts a 4-section gun assembly where each section includes 3 circumferential segments containing 2 shape charges each. This gun assembly can be used to fire all 24 charges at a given depth, or to fire 2 charges at a time in 12 different target depths or any of the other possible combinations in between these two.

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BAL4-57182-US

Title:  Selectable Segmented Gun System

Abstract:  The current Plug and Perf (PNP) strings used in multi-stage hydraulic fracking operations include a stack of several short gun sections above the setting tool; each gun section include few shaped charges and it is fired at a pre-defined depth while pulling out of the hole after the plug has been set.  After removing the PNP string the well is then subjected to extreme high pressures to fracture the zones just perforated, before the PNP string for the next stage is rigged up.  This invention addressed the most notorious shortcomings of the existing PNP gun configuration by reducing the length of the perforating guns significantly while eliminating the need to manufacture new gun assemblies every time.  This new method uses a re-usable circumferentially and/or longitudinally segmented gun assembly, where each segment can be independently selected/fired and re-dressed after removing a purposed-built cover plate.  The attached sketch depicts a 4-section gun assembly where each section includes 3 circumferential segments containing 2 shape charges each.  This gun assembly can be used to fire all 24 charges at a given depth, or to fire 2 charges at a time in 12 different target depths or any of the other possible combinations in between these two. 

Description:  The current Plug and Perf (PNP) strings used in multi-stage hydraulic fracking operations include a stack of several short gun sections above the setting tool; each gun section include few shaped charges and it is fired at a pre-d...