Cementing Oil and Gas Well Casings On A Contract Basis
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213 Support Activities for Mining
- Definitions for North American Industry Classication System categories: 213 Support Activities for Mining ... Water intake well drilling, oil and gas field on a contract basis ...
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21 Mining and Oil and Gas Extraction
- performing oil field services for operators, on a contract or fee basis (21311, Support ... Building oil and gas well foundations on site, on a. contract basis ...
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