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drill collar
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drill collar

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Description

Drill collar is mainly used to provide bit weight to drill hit so that drill pipe is in tension. Especially drill collar can keep drill bit centralizes and hole track by large rigidity.

oil pipe, drilling tool,

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TIANHE PETROLEUM MACHINERY CO.,

drill collar

Address: NO.43 West Diming Street,
Mudanjiang, Heilongjiang
China, 157011

Tel: 86-453-6532609-8311
Fax: 86-453-6531608

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