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US 2006/0124359 A1Published application
Method of avoiding the need for a scraper run in drill out operations and a downhole drilling motor assembly
OwnerLarry Bunneyinventor
Life of this patent
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Abstract
A method of avoiding the need for a scraper run in drill out operations. The method involves the single step of incorporating a rotary scraper into the downhole drilling motor assembly in such a manner that the rotary scraper rotates with the drill bit and follows the drill bit to scrape debris from interior casing walls.
Claims5
A method, comprising the step of:
- incorporating a rotary scraper into a downhole drilling motor assembly in such a manner that the rotary scraper rotates with and follows the drill bit scraping debris from interior casing walls.
An assembly, comprising:
- a rotary scraper;
- a drill bit mounted to a first end of the rotary scraper;
- a drilling motor adapted to rotate both the rotary scraper and the drill bit, such that the rotary scraper follows the drill bit and scrapes debris from interior casing walls.
An apparatus, comprising:
- a tubular body having exterior surface and an interior surface, the interior surface defining a central mud flow bore;
- a plurality of scraper blades extending from the exterior surface of the body;
- and
- biasing springs underlying the scraper blades to bias each of the scraper blades radially outwardly from the body.
1 more element
Dependencies are inferred from the claim text.