Jet pump and oil test technologies based on same

Abstract

The invention discloses a jet pump which comprises an upper connector provided with upper pressure transmitting holes and middle pressure transmitting holes, a first sleeve, a second sleeve, a third sleeve and a lower connector, wherein the first sleeve is arranged on the upper connector in a sleeving mode, and an upper hydraulic cylinder communicated with the upper pressure transmitting holes is arranged between the first sleeve and the upper connector; the second sleeve is fixedly arranged outside the first sleeve in a sleeving mode; the upper end of the third sleeve is fixedly arranged on the upper connector in a sleeving mode, a middle hydraulic cylinder communicated with the middle pressure transmitting holes is arranged between the upper end of the third sleeve and the lower end of the first sleeve, a lower hydraulic cylinder is arranged between the third sleeve and the second sleeve, the third sleeve is provided with lower pressure transmitting holes communicated with the lower hydraulic cylinder, provided with inner circulating holes and provided with suction holes in the axial direction, and the second sleeve is provided with outer circulating holes matched with the inner circulating holes; the lower connector is fixedly connected with the lower end of the third sleeve. By means of the jet pump, the oil test technologies such as perforation, test, pumping drainage, high-pressure pump injection and pump drainage combining five kinds of operation can be achieved under the condition that the sleeves are protected.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development oil testing, in particular to a jet pump and an oil testing process based on the jet pump. Background technique [0002] In the process of oil and gas exploration and development, it is necessary to perform oil testing (testing) operations on the oil and gas layers in the well. The underground oil and gas are collected by running testing tools into the well to measure data such as pressure, temperature, production and fluidity, so as to carry out economic and technical evaluation on the production layer in a timely and accurate manner. [0003] The procedures of conventional oil testing technology include: perforating, formation testing, jet pump drainage, reservoir stimulation, etc. [0004] During the reservoir reconstruction process, it is necessary to properly increase the pump injection pressure under the premise of protecting the casing well, so as to expand th...

AI Technical Summary

Problems solved by technology

And when the outer bypass hole 301 of the jet pump 3 is kept open, the tubing 1 and the casing 2 are connected to each other, and the well opening and closing operation cannot be performed by pressurizing the annular space.

Therefore, the existing hydraulic jet pumps generally cannot take into account the accurate fluidity of the pump discharge before the reservoir transformation, the medium and high pressure pump injection after the transformation, and the pump discharge after the transformation.

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