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10:32 Sep 4, 2006 |
Russian to English translations [PRO] Tech/Engineering - Petroleum Eng/Sci | |||||||
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| Selected response from: Pristav (X) Local time: 15:53 | ||||||
Grading comment
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Summary of answers provided | ||||
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1 +2 | scratcher-centralizer |
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3 | pig-centralizer |
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Discussion entries: 2 | |
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scratcher-centralizer Explanation: http://www.everypatent.com/comp/pat5335723.html Combination scratcher-centralizer for wellbore casings United States Patent 5,335,723 Mouton August 9, 1994 Abstract A combination scratcher-centralizer for use in installing casing in wellbores comprising a single piece of coiled wire or rod having a first hub part for tightly engaging the casing, a radially expanded centralizer and scratcher portion forming a helical wrap of said wire and a second hub part slidable on the casing and formed by a helical wrap of said wire. The first hub part includes serrations and/or a plurality of retaining screws provided so that the first hub part may be secured to the casing in a predetermined position to allow the expanded centralizer coil or wrap portion to undergo some elastic axial excursion during its scratching and scraping operation upon installation in a wellbore. The constricted hub part may be held in a radially expanded position during installation by a retainer engageable with spaced apart portions of the wraps of the hub part. |
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4 hrs confidence:
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