Title:
DUAL VALVES FOR REVERSE CEMENTING OPERATIONS
Document Type and Number:
WIPO Patent Application WO/2022/093196
Kind Code:
A8
Abstract:
A dual valve downhole tool for reverse cementing in a wellbore can include: a body configured to fit within a casing string; an inner sleeve located within the body; a first valve located within the body and configured to open and close a fluid flow path through the body, and wherein the first valve is configured to be in an open position during placement of the downhole tool in the wellbore; and a second valve located within the body and configured to open and close the fluid flow path through the body, wherein the second valve is configured to be in a closed position during placement of the downhole tool in the wellbore, and wherein shifting of the inner sleeve after placement of the downhole tool closes the first valve and opens the second valve. Reverse cementing can commence after the second sleeve has converted to the open position.
Inventors:
HELMS LONNIE (US)
Application Number:
PCT/US2020/057540
Publication Date:
March 09, 2023
Filing Date:
October 27, 2020
Export Citation:
Assignee:
HALLIBURTON ENERGY SERVICES INC (US)
International Classes:
E21B34/14; E21B23/04; E21B33/05; E21B33/16
Attorney, Agent or Firm:
HIGGINS, Sheri, L. (US)
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