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1. (WO2018085001) METHODS AND SYSTEMS FOR A PRESSURE CONTROLLED PISTON SLEEVE

Pub. No.:    WO/2018/085001    International Application No.:    PCT/US2017/055756
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Tue Oct 10 01:59:59 CEST 2017
IPC: E21B 34/10
E21B 34/06
E21B 43/12
Applicants: COMITT WELL SOLUTIONS US HOLDING INC.
Inventors: CLEVEN, Peter, Kris
Title: METHODS AND SYSTEMS FOR A PRESSURE CONTROLLED PISTON SLEEVE
Abstract:
Embodiments disclosed herein describe fracturing methods and systems for a tool with a new check valve. The check valve may include a piston sleeve that is configured to move towards the proximal end of the tool to seal restrictive ports in a center of the tool responsive to creating a force on the piston sleeve. In embodiments, the movement of the piston sleeve may be counter to the flow of fluid through an inner diameter of the tool, such that the tool may be resettable and repeatable based on fluid flow and / or pressure differentials and not based on drag force through an inner diameter of the tool.