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Perforating gun assembly and method for creating perforation cavities

一种射孔枪、组件的技术，应用在射孔枪组件领域，能够解决射孔孔道渗透性减小等问题

Inactive Publication Date: 2007-05-16
DELPHIAN TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, it has been found that even when perforating is underbalanced, the surface of the perforation tunnel is less permeable compared to the native rock

Method used

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  • Perforating gun assembly and method for creating perforation cavities
  • Perforating gun assembly and method for creating perforation cavities
  • Perforating gun assembly and method for creating perforation cavities

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Embodiment Construction

[0028] While the making and using of various embodiments of the invention are discussed in detail below, it should be understood that the invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed herein are merely exemplary specific ways to make and use the invention, and do not limit the scope of the invention.

[0029] Referring firstly to FIG. 1 , there is schematically shown a perforating gun assembly, indicated generally at 10 , suitable for use in a wellbore operating from an offshore oil and gas platform. The semi-submersible platform 12 is centered over a deposited hydrocarbon layer 14 located below the seabed 16 . A subsea pipeline 18 extends from a deck 20 of the platform 12 to a wellhead 22 including a blowout preventer 24 . The platform 12 has a jack 26 and a derrick 28 for raising and lowering the tubular string.

[0030] Wellbore 36 extends through various rock formation...

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Abstract

The invention provides a perforating gun assembly and a method for forming perforation cavities. The perforating gun assembly (60) for creating communication paths for fluid between a formation (64) and a cased wellbore (66) includes a housing (84), a detonator (86) positioned within the housing (84) and a detonating cord (90) operably associated with the detonator (86). The perforating gun assembly (60) also includes one or more substantially axially oriented collections (92, 94, 96, 98) of shaped charges. Each of the shaped charges in the collections (92, 94, 96, 98) is operably associated with the detonating cord (90). In addition, adjacent shaped charges in each collection (92, 94, 96, 98) of shaped charges are oriented to converge toward one another such that upon detonation, the shaped charges in each collection (92, 94, 96, 98) form jets that interact with one another to create perforation cavities in the formation (64).

Description

technical field [0001] The present invention relates generally to the formation of cased wellbores through subterranean hydrocarbon-bearing formations by perforating, and more particularly to a perforating gun assembly having collections of shaped charges that detonate The set of shaped charges emit jets that interact together to form the perforation cavity. Background technique [0002] Without limiting the scope of the invention, the background of the invention will be described with reference to perforating a subterranean formation with a perforating gun assembly by way of example. [0003] After drilling a portion of a subterranean wellbore through a rock formation, lengths of relatively large diameter metal tubing are typically secured together to form a string of casing positioned within the wellbore. The string of casing enhances the integrity of the wellbore and provides a path for producing fluids from the producing interval to the surface. Traditionally, the casi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/119
CPCE21B43/119
Inventor 邓肯·A·麦克尼文麦克尔·C·罗格斯詹姆斯·K·巴克
Owner DELPHIAN TECH
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