Integrated oil extraction and purification can amount to manufacture, with drilling rig parts qualifying for statutory set-off.

Extraction of crude oil, together with separation and de-emulsification up to the stage of supply for further refining, was treated as manufacture because section 2(17) of the Bombay Sales Tax Act, 1959 defines manufacture broadly to include extracting, altering and processing. The court treated drilling, extraction, purification and forwarding for refining as one integrated business operation, not as separate disconnected steps. On that basis, goods used in the integrated manufacturing process were eligible for set-off under rule 41 of the Bombay Sales Tax Rules, 1959, including tax paid on parts of drilling rigs used in the oil-extraction operation.

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Issues: (i) Whether the extraction of crude oil from the earth, together with its separation and de-emulsification up to the stage of supply for further refining, constituted manufacture within the meaning of the Bombay Sales Tax Act, 1959. (ii) Whether set-off under rule 41 of the Bombay Sales Tax Rules, 1959 was admissible in respect of tax paid on parts of drilling rigs used in the oil-extraction operation.

Issue (i): Whether the extraction of crude oil from the earth, together with its separation and de-emulsification up to the stage of supply for further refining, constituted manufacture within the meaning of the Bombay Sales Tax Act, 1959.

Analysis: The definition of manufacture in section 2(17) is wide and includes producing, making, extracting, altering and processing. The activity of the assessee was not confined to the bare removal of oil from the well. The findings showed a continuous sequence beginning with drilling and extraction and ending with separation and purification of crude oil before it was sent for further refinement. Such linked operations could not be artificially split into disconnected compartments. Where mining, extraction and processing form one integrated business operation, the whole activity may amount to manufacture or processing.

Conclusion: The extraction and purification activity constituted manufacture, and the answer to this issue was in favour of the assessee.

Issue (ii): Whether set-off under rule 41 of the Bombay Sales Tax Rules, 1959 was admissible in respect of tax paid on parts of drilling rigs used in the oil-extraction operation.

Analysis: Once the overall operation was held to be manufacture, goods used in the various stages of that integrated operation were goods used in the manufacture of goods for sale. The fact that drilling rigs were treated as equipment rather than machinery did not prevent their parts from qualifying for set-off if they were used in the manufacturing operation and were not prohibited goods. The allowance of set-off therefore followed from the character of the use of the goods in the integrated manufacturing process.

Conclusion: Set-off was rightly allowed in respect of the parts of drilling rigs, and this issue was decided in favour of the assessee.

Final Conclusion: The reference failed, and the Tribunal's view that the assessee's oil-extraction and purification operations amounted to manufacture, with consequential entitlement to set-off, was upheld.

Ratio Decidendi: Where extraction, purification and related operations are interdependent parts of a single commercial process, they may be treated as an integrated manufacturing process, and goods used in that process qualify accordingly for statutory set-off.

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