Reverse cementation of liner string for formation stimulation
AssigneeWeatherford Technology Holdings, LLC
InventorsDamian Leonard Ward, Jeffrey Lance Orita, Randal Brent Biedermann, Simon J. Harrall
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Abstract
A method of lining a wellbore having a tubular string cemented therein includes: running a liner string into the wellbore using a workstring having a liner deployment assembly (LDA) latched to the liner string; hanging the liner string from the tubular string and setting a seal of the liner string against the tubular string; opening a crossover valve of the liner string located below the set seal; and pumping cement slurry through the open crossover valve and down an annulus formed between the liner string and the wellbore.
Claims30
A method of lining a wellbore having a tubular string cemented therein, comprising:
- running a liner string into the wellbore using a workstring having a liner deployment assembly (LDA) latched to the liner string;
- opening a port of a reverse cementing valve (RCV) located at a lower portion of the liner string;
- closing a bore of the workstring;
- hanging the liner string from the tubular string and setting a seal of the liner string against the tubular string;
- opening a crossover valve of the liner string located below the set seal;
- and
- pumping cement slurry through the open crossover valve and down an annulus formed between the liner string and the wellbore, wherein the crossover valve is located at an upper portion of the liner string.
A liner string for use in a wellbore, comprising:
- a mandrel having a latch profile formed at an upper end thereof for engagement with a running tool;
- a seal disposed along the mandrel;
- a setting sleeve linked to the mandrel for engagement with a setting tool to set the seal;
- a crossover valve for connection to a lower end of the mandrel;
- and
- a reverse cementing valve (RCV) for connection to the crossover valve.
Dependencies are inferred from the claim text.