Monobore wellbore and method for completing same
AssigneeHalliburton Energy Services, Inc.
InventorRay C. Smith
Life of this patent
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Abstract
A monobore wellbore (68) and method for completing the same are disclosed. The monobore wellbore (68) comprises a first casing (74) having an inner diameter (76) and a lap region (80). A second casing (90) is positioned within the wellbore (70) by passing through the first casing (74) such that an uphole end of the second casing (90) is positioned within the lap region (80) of the first casing (74). After downhole expansion, the second casing (90) has an inner diameter (114) that is substantially the same as the inner diameter (76) of the first casing. The uphole end of the second wellbore is coupled to the lap region (80) of the first casing (74) to create a mechanical connection and a hydraulic seal, thereby creating the monobore wellbore (68).
Claims50
A monobore wellbore comprising:
- a first casing positioned within the wellbore, the first casing having a first inner diameter and a lap region in a downhole end thereof;
- and
- a second casing positioned within the wellbore such that an uphole end of the second casing is positioned within the lap region of the first casing, the second casing having a second inner diameter that is substantially the same as the first inner diameter, the uphole end of the second casing being coupled to the lap region of the first casing when the first and second casings are positioned within the wellbore.
A monobore multilateral wellbore comprising:
- a first casing positioned within a main wellbore, the first casing having a first diameter, a lap region and a window;
- and
- a second casing positioned within a branch wellbore such that an uphole end of the second casing extends through the window into the lap region of the first casing, the second casing having a second inner diameter that is substantially the same as the first inner diameter, the uphole end of the second casing being coupled to the lap region of the first casing when the first and second casings are positioned within the multilateral wellbore.
A monobore wellbore of adjoining wellbores comprising:
- a first casing positioned within a first wellbore, the first casing having a first inner diameter and a lap region;
- and
- a second casing positioned within a second wellbore that adjoins the first wellbore such that a downhole end of the second casing is positioned within the lap region of the first casing, the second casing having a second inner diameter that is substantially the same as the first inner diameter, the downhole end of the second casing being coupled to the lap region of the first casing when the first casing is positioned within the first wellbore and the second casing is positioned within the second wellbore.
A method of forming a connection between adjoining wellbores comprising the steps of:
- installing a first casing within a first wellbore, the first casing having a first inner diameter and a lap region;
- installing a second casing within a second wellbore that adjoins the first wellbore such that a downhole end of the second casing is positioned within the lap region of the first casing, the second casing having a second inner diameter that is substantially the same as the first inner diameter;
- and
- coupling the downhole end of the second casing to the lap region of the first casing downhole.
Dependencies are inferred from the claim text.