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1. (WO2018165067) IN-SITU REPLACEMENT OF FLUIDS IN A WELL TOOL

Pub. No.:    WO/2018/165067    International Application No.:    PCT/US2018/021009
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Wed Mar 07 00:59:59 CET 2018
IPC: E21B 43/12
Applicants: SAUDI ARABIAN OIL COMPANY
ARAMCO SERVICES COMPANY
Inventors: ROTH, Brian A.
XIAO, Jinjiang
LASTRA, Rafael Adolfo
Title: IN-SITU REPLACEMENT OF FLUIDS IN A WELL TOOL
Abstract:
An assembly (14) for circulating tool fluid of a downhole tool includes a tool fluid source line (84) extending into a subterranean well (10) from a wellhead spool assembly (44) to the downhole tool (14). A tool fluid return line (86) extends out of the subterranean well (10) from the downhole tool (14) to the wellhead spool assembly (44). A tool fluid reservoir (98) is located at a surface outside of the subterranean well. The tool fluid source line (84) is in one way fluid communication with the tool fluid reservoir (98) and the tool fluid is free of fluid communication with wellbore fluids.