Reduced debris milled multilateral window
AssigneeHalliburton Energy Services, Inc.
InventorsJody R. McGlothen, Joseph D. Parlin
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Abstract
A reduced debris milled multilateral window. In a described embodiment, a window joint is constructed in a manner which reduces debris created when a window is milled therethrough. The window joint includes a generally tubular body having a sidewall, a window portion of the sidewall being configured for forming a window therethrough, and a thickness of the sidewall being reduced in the window portion.
Claims37
A window joint, comprising:
- a generally tubular body having a sidewall, a window portion of the sidewall being configured for forming a window therethrough, and a thickness of the sidewall being reduced in the window portion.
A window joint system, comprising:
- a window joint interconnected in a casing string positioned in a first wellbore, the window joint including a sidewall having a window portion through which a window is formed to drill a second wellbore, the window portion having a reduced thickness of the sidewall prior to forming the window through the window portion.
A method of drilling a branch wellbore extending laterally from an intersection with a parent wellbore, the method comprising the steps of:
- interconnecting a window joint in a casing string, the window joint including a sidewall having a window portion with a reduced thickness of the sidewall;
- positioning the casing string in the parent wellbore;
- aligning the window joint with the window portion facing toward the desired branch wellbore;
- cutting through the window portion of the window joint, thereby forming a window through the sidewall;
- and
- drilling the branch wellbore through the window.
Dependencies are inferred from the claim text.