Oil casing pipe gas seal detection technology principle and process Principle: The tightness of the oil casing buckle is closely related to the pressure and medium. The pressure and medium molecular size are different, and the permeability is different. The gas is more difficult to seal than the liquid. The principle of gas seal detection technology is to use the low molecular gas medium to test the gas seal performance of the oil casing buckle under the allowed high pressure conditions.
Process: Inserting a test tool with a double packer into the column, sealing it up and down at the threaded joint, then injecting high-pressure nitrogen and ammonia mixed gas into the middle sealed space, and detecting it outside the thread with a high-sensitivity helium detector. To determine if a leak has occurred.
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