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US 7,628,205 B2Granted
Optimized machining process for cutting tubulars downhole
AssigneeBaker Hughes Incorporated
InventorsKarsten Fuhst, Sven Krueger
Life of this patent
Estimating the term…
Abstract
The tubular cutter disclosed herein is useful for severing downhole tubulars and comprises a drive system, a pivoting system, a cutting head, and a cutting member. Cutting is accomplished by rotatingly actuating the cutting head with an associated motor, and then radially extending the cutting blade away from the cutting head. In one embodiment, the cutting head includes a cutting member that pivotally extends from the cutting head upon rotation of the cutting head.
Claims14
A method of cutting a tubular comprising:
- inserting a cutting member within the tubular;
- disposing a lubricant between the cutting member and the tubular;
- and
- adding an isolation material adjacent the lubricant, wherein the isolation material is selected from the list consisting of a gel, a colloidal suspension, a polysaccharide gum, xanthan gum, and guar gum.
1 more element
A method of severing a tubular within a wellbore comprising:
- disposing a cutting tool having a cutting surface within the wellbore;
- injecting a lubricant between the cutting surface and the inner surface of the tubular;
- and
- injecting a retaining material adjacent the lubricant thereby selectively retaining the lubricant between the cutting surface and the inner surface.
1 more element
Dependencies are inferred from the claim text.