Downhole scraper assembly
AssigneeSmith International, Inc.
InventorsBruce McGarian, Ian Gillies
Life of this patent
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Abstract
This invention relates to apparatus for scraping the inner surface of a wellbore. A scraper assembly (2) is provided comprising a scraper element (6) incorporating: a generally cylindrical member defined by a wall having a slot extending through the wall thickness; and at least one tooth member provided on the outer surface of the wall for scraping engagement with a wellbore. The present invention thereby provides a scraper assembly which is relatively convenient and inexpensive to manufacture and which may be considered as a disposable item of downhole equipment.
Claims10
A scraper assembly for use in a wellbore, the scraper assembly comprising a scraper element incorporating:
- a generally cylindrical member defined by a wall having a slot extending through the wall thickness;
- and
- at least one tooth member provided on the outer surface of the wall and extending circumferentially through an angle of at least 360° for scraping engagement with a wellbore, wherein the slot extends helically along the length of the cylindrical member so as to cut across the or each tooth member.
Dependencies are inferred from the claim text.