Shanghai Garrison Oil Pipes Co.,Ltd. -

Shanghai Garrison Oil Pipes Co.,Ltd.

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drill collars
Specification: 3 1/8"-11"
Detail: Materials Drill collars are manufactured from AISI 4145H modified steel, and are supplied in the ¡°as rolled¡± surface finish condition. Alternative surface finishes are available. Trepanning and Heat Treatment Drill co...


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