Methods and apparatus for completion of well bores
AssigneeHalliburton Energy Services, Inc.
InventorsDonald Winslow, Alton Branch
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Abstract
Methods and devices for completion of well bores and more particularly, to reverse circulation cementing of casing strings in well bores are provided. One example of a method may comprise a method for providing fluidic access to an outer annulus of a casing string within a well bore. One example of a device may comprise a casing hanger, the casing hanger comprising a fluid port wherein the fluid port provides fluidic access to an outer annulus by allowing fluid to pass through the casing hanger; a landing sub attached to the casing hanger; and an isolation device attached to the landing sub wherein the isolation device is adapted to allow fluidic isolation of a portion of the landing sub from a portion of the outer annulus of the well bore.
Claims22
A method for providing fluidic access to an outer annulus of a casing string within a well bore comprising:
- providing an apparatus comprising a casing hanger, the casing hanger comprising a fluid port wherein the fluid port provides fluidic access to the outer annulus by allowing fluid to pass through the casing hanger, a landing sub attached to the casing hanger, an isolation device attached to the landing sub wherein the isolation device is adapted to allow fluidic isolation of a portion of the landing sub, and a mechanical slip disposed above the isolation device engaged with a subsurface section of the well bore, wherein the mechanical slip prevents floating of the casing string;
- landing the apparatus at the well bore wherein the isolation device provides fluidic isolation of a portion of the outer annulus;
- introducing a cement slurry into the outer annulus via the fluid port;
- and
- allowing the cement slurry to set up in the outer annulus.
An apparatus for providing fluidic access to an outer annulus of a casing string within a well bore comprising:
- a casing hanger, the casing hanger comprising a fluid port wherein the fluid port provides fluidic access to the outer annulus by allowing fluid to pass through the casing hanger;
- a landing sub attached to the casing hanger;
- an isolation device attached to the landing sub wherein the isolation device is adapted to allow fluidic isolation of a portion of the landing sub from a portion of the outer annulus;
- and
- a mechanical slip disposed above the isolation device which is adapted to engage a subsurface section of the well bore to prevent floating of the casing string.
A reverse circulation cementing system comprising:
- a casing string disposed within a well bore, the well bore having an outer annulus formed by the casing string being disposed within the well bore;
- a casing hanger disposed about a longitudinal portion of the casing string, the casing hanger comprising a fluid port wherein the fluid port provides fluidic access to the outer annulus by allowing fluid to pass through the casing hanger;
- a landing sub attached to the casing hanger;
- an isolation device attached to the landing sub wherein the isolation device is adapted to allow fluidic isolation of a portion of the landing sub from a portion of the outer annulus;
- and
- a mechanical slip disposed above the isolation device which is adapted to engage a subsurface section of the well bore, wherein the mechanical slip prevents floating of the casing string.
Dependencies are inferred from the claim text.