Deviated borehole drilling assembly
AssigneeSchlumberger Technology Corporation
InventorGrant E. E. George
Life of this patent
Estimating the term…
Abstract
A wellbore casing, including a casing section, for deployment in a subterranean wellbore. The casing section includes a pre-milled windowed opening. A liner is disposed within the casing section covering the window opening from the inside. In addition, a rigid material is disposed outside of the casing section covering the window opening. A filer is located intermediate the casing section and the liner. The liner, filler and rigid material prevent cement from affecting the window opening when the casing section is being cemented in the wellbore.
Claims24
A wellbore casing for deployment in a subterranean wellbore, comprising:
- a casing section including a pre-milled window opening;
- a liner disposed within the casing section covering the window opening;
- a filler located intermediate the casing section and the liner;
- and
- a rigid material disposed outside of the casing section covering the window opening;
- wherein the liner, filler, and rigid material prevent cement from affecting the window opening when the casing section is being cemented in the wellbore.
A wellbore casing for deployment in a subterranean wellbore,
- a casing section including a pre-milled window opening;
- a liner disposed within the casing section covering the window opening;
- a filler located intermediate the casing section and the liner;
- and
- a rigid material disposed outside of the casing section covering the window opening.
Dependencies are inferred from the claim text.