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1. (WO2018106780) SYSTEM AND METHOD FOR REMOVING SAND FROM A WELLBORE

Pub. No.:    WO/2018/106780    International Application No.:    PCT/US2017/064865
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Thu Dec 07 00:59:59 CET 2017
IPC: E21B 43/38
Applicants: SAUDI ARABIAN OIL COMPANY
ARAMCO SERVICES COMPANY
Inventors: AYUB, Muhammad
HABIB, Nabeel, S.
Title: SYSTEM AND METHOD FOR REMOVING SAND FROM A WELLBORE
Abstract:
A system (10) and method of removing sand (39) from a wellbore (12) by mixing the sand (39) with a liquid to form a slurry (53), and forcing the slurry (53) through a discharge line (56) to surface. The sand (39) is separated from the production fluid within the wellbore (12) by centrifugal action created using a specially design screen or tangential perforations, and directed into a portion of the wellbore (12) that is sealed from the remainder of the wellbore (12). The liquid and sand (39) are mixed together in the sealed portion of the wellbore (12), and the pressure of the fluid is sufficient to force the slurry (53) uphole. Included in the sealed portion of the wellbore (12) is a perturbation element (52) for mixing the sand (39) and liquid.