Anti-theft airtight quick sampling valve

Abstract

The invention relates to an anti-theft airtight quick sampling valve, which includes a micro ball valve, a sampling tube and a sampling control tube, and is characterized in that an inlet male thread of the micro ball valve is connected with a female thread of a sampling connector on a sampling pipeline; a female thread thereof is connected with the sampling control tube; an outlet of the micro ball valve is in threaded connection with a pressing cap with a backstop annular groove; an annular rubber seal gasket is arranged between the pressing cap and the outlet of the micro ball valve; the sampling tube passes through the pressing cap, the annular rubber seal gasket and a ball core hole, and is inserted into the sampling control tube. When the anti-theft airtight quick sampling valve is used for sampling, no blind sample region exists, airtight sampling without evacuation can be realized, qualified samples can be sampled, accuracy of sample test analysis data can be ensured, reliable parameters can be provided for development and analysis of oil gas fields, and requirements of formulation of a development scheme of oil gas fields can be met.

Description

technical field [0001] The invention relates to an oilfield crude oil sampling control mechanism, in particular to an anti-theft airtight quick sampling valve. Background technique [0002] The analysis of the physical properties of crude oil and natural gas and the analysis of production dynamics in the oil field are obtained by taking oil and gas samples from the oil and gas gathering pipelines for laboratory analysis to obtain reference data. Obtaining qualified samples is the key to technology. The current sampling valve structure and sampling method have the following disadvantages for obtaining qualified samples: one is to vent the sample, first let go of the dead sample in the sampling valve and the sampling joint, and then take the real online fresh sample, which not only wastes energy , pollute the environment, and also destroy the flow state of oil, gas and water. The samples taken out are all gas or all water or all oil, which cannot reflect the real situation onl...

AI Technical Summary

Problems solved by technology

The current sampling valve structure and sampling method have the following disadvantages for obtaining qualified samples: one is to vent the sample, first let go of the dead sample in the sampling valve and the sampling joint, and then take the real online fresh sample, which not only wastes energy , pollute the environment, and also destroy the flow state of oil, gas and water. The samples taken out are all gas or all water or all oil, which cannot reflect the real situation online

The second is the current structure of the sampling valve. There must be dead samples in the sampling valve and the sampling joint. If the sample is not released, it cannot be guaranteed that the sample is completely fresh. It is impossible to obtain a very qualified sample due to the existence of the above two shortcomings. Yes, the sampling valve structure and sampling method must be changed

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