Section mill and method for abandoning a wellbore
US-2021095538-A1 · Apr 1, 2021 · US
Casing mill, method, and system
US11753891B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11753891-B2 |
| Application number | US-202117499471-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 12, 2021 |
| Priority date | Oct 12, 2021 |
| Publication date | Sep 12, 2023 |
| Grant date | Sep 12, 2023 |
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- Title
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- Abstract
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Abstract
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A casing mill including a first milling configuration having a first blade for milling a first casing section, and a second milling configuration having a second blade, the second blade being an ultra-high expansion blade for milling a second casing section. A wellbore system including a borehole in a subsurface formation, two nested casings disposed within the borehole, a string disposed within the casings, a casing mill disposed within or as a part of the string and including a first milling configuration having a first blade for milling a first casing section, and a second milling configuration having a second blade, the second blade being an ultra-high expansion blade for milling a second casing section, the second casing section being radially outwardly disposed of the first casing section, and a stroking tool disposed between the first milling configuration and the second milling configuration.
First claim
Opening claim text (preview).
What is claimed is: 1. A casing mill comprising: a first milling configuration having a first blade for milling a first casing section; and a second milling configuration having a second blade, wherein the first blade and the second blade are longitudinally spaced apart, the second blade being an ultra-high expansion blade for milling a second casing section, the second casing section being radially outwardly disposed of the first casing section, the casing mill being configured to cut the first and second casing with the first and second milling configuration, respectively, simultaneously. 2. The mill as claimed in claim 1 wherein a stroking tool is disposed between the first milling configuration and the second milling configuration. 3. The mill as claimed in claim 1 wherein the first blade is configured to mill radially outwardly through the first casing and then axially along the first casing. 4. The mill as claimed in claim 1 wherein the second blade is configured to mill radially outwardly through the second casing and then mill axially along the second casing. 5. The mill as claimed in claim 1 wherein the first and second blades are configured only to mill axially of the first and second casings, respectively. 6. A method for milling both of a first casing radially outwardly of a second casing and the second casing comprising: running a mill comprising: a first milling configuration having a first blade for milling a first casing section; and a second milling configuration having a second blade, wherein the first blade and the second blade are longitudinally spaced apart, the second blade being an ultra-high expansion blade for milling a second casing section, the second casing section being radially outwardly disposed of the first casing section; milling the first casing; and milling the second casing simultaneously with the first casing. 7. The method as claimed in claim 6 wherein the casing mill is positioned at a pre-opened window. 8. The method as claimed in claim 6 wherein the casing mill is positioned at a selected depth and opens a window. 9. The method as claimed in claim 6 wherein the first milling configuration opens a window in the first casing and the second milling configuration is delayed in operation until the second milling configuration is in register with the window milled by the first milling configuration prior to the simultaneous milling of the first and second casings. 10. A wellbore system comprising: a borehole in a subsurface formation; two nested casings disposed within the borehole; a string disposed within the casings; a casing mill disposed within or as a part of the string and including a first milling configuration having a first blade for milling a first casing section; and a second milling configuration having a second blade, wherein the first blade and the second blade are longitudinally spaced apart, the second blade being an ultra-high expansion blade for milling a second casing section, the second casing section being radially outwardly disposed of the first casing section, the casing mill being configured to cut the first and second casings with the first and second milling configurations, respectively, simultaneously.
Assignees
Inventors
Classifications
- E21B29/005Primary
with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window · CPC title
with expansible cutting tools · CPC title
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Frequently asked questions
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- What does patent US11753891B2 cover?
- A casing mill including a first milling configuration having a first blade for milling a first casing section, and a second milling configuration having a second blade, the second blade being an ultra-high expansion blade for milling a second casing section. A wellbore system including a borehole in a subsurface formation, two nested casings disposed within the borehole, a string disposed withi…
- Who is the assignee on this patent?
- Alexander David, Ponder Andrew, Dahlberg Knut Inge, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification E21B29/005. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Sep 12 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).