Drilling fluid quantitative degassing device

Abstract

The invention relates to a drilling fluid quantitative degassing device which comprises a slurry pump, a degasser, an analyzer and a monitoring controller, wherein the slurry pump is arranged in a slurry tank and used for pumping drilling fluid from the slurry tank; the degasser is connected with the slurry pump through a drilling fluid connecting pipeline and used for carrying out gas-liquid separation on the drilling fluid pumped by using the slurry pump; the analyzer is connected with the degasser through a sample gas delivery pipeline and used for performing an online analysis on the sample gas separated from the drilling fluid by using the degasser; the monitoring controller is used for online monitoring the drilling fluid flow pumped by using the slurry pump, and controlling and regulating the pumping amount of the slurry pump in a real-time manner according to the monitoring result, so as to realize quantitative pumping and degassing of the drilling fluid. The drilling fluid quantitative degassing device provided by the invention is simple and reliable in structure, and can online monitor the drilling fluid sampling amount, control and regulate the pumping amount of the slurry pump in a real-time manner, so as to realize quantitative degassing; the device can also provide quantitative parameter information of the drilling fluid flow for comprehensive logging analysis, and improve the authenticity and reliability of quantitative gas logging while ensuring the gas logging quantitative sampling.

Description

technical field [0001] The invention relates to a drilling fluid degassing device, in particular to a degassing device capable of realizing quantitative degassing, and belongs to the geological logging engineering technology of oil drilling sites. Background technique [0002] In oil and gas exploration logging, on-line gas logging is the core of logging analysis, specifically, on-line detection of the gas separated from the drilling fluid returned during the drilling process, analysis of the hydrocarbon components and content, and evaluation of the drilling formation oil and gas content. Degassing and sampling of drilling fluid is the premise of on-line gas logging, which is directly related to the accuracy and reliability of gas logging. [0003] At present, the drilling fluid degassing device is usually placed in the mud tank during the logging process, and the gas in the drilling fluid is removed by stirring and degassing. This method is easily affected by the fluctuat...

AI Technical Summary

Problems solved by technology

Limited by the peristaltic pump, the sampling volume of the drilling fluid is small (usually less than 1 L / min), which is easily disturbed by external factors and seriously affects the accuracy of gas logging

And because this method is subject to the defect of small drilling fluid sampling volume, it is not comparable with the existing common degassing methods, which brings inconvenience to field application

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