Insert assembly for downhole perforating apparatus

US9228421B2 · kind B2 · utility

Assignee

• Ten K Energy Services Ltd.

Inventors

• Michael Kent · Goleta, US
• David Donnelly · Edmonton, CA

Key dates

• Filing date: Jul 30, 2012
• Grant date: Jan 5, 2016
• Expiry date: Feb 10, 2034

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B43/26
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

An insert for perforating a subterranean formation sealingly engages a port in a production casing run into a wellbore intersecting the formation. The insert has a core where in a first mode it prevents fluid passage through the insert, and a second mode where the core disengages from the insert upon a treatment fluid reaching a threshold pressure in the casing, and ejects from the insert as a projectile to initiate and contribute to the fracture and stimulation of the formation by the pressurized treatment fluid exiting the port. The insert has a chamber which is filled with a gel that prevents wellbore cement from setting and is covered by a perforated debris shield that permits the equalization of pressure between the chamber and the annulus between the casing and wellbore.