A kind of sliding sleeve type sand blaster and using method

Abstract

The invention relates to the technical field of oil exploitation equipment, and discloses a sliding sleeve type sand blaster, which includes an upper connecting pipe, a lower connecting pipe and a sliding sleeve, and a freely sliding sliding ball seat is arranged inside the upper connecting pipe and the lower connecting pipe. The sliding sleeve sand blaster and its use method, because the sliding ball seats are put in step by step, the diameters above the sliding ball seats of the fracturing stages are exactly the same, the distribution of the flow section in the fracturing column is even, and no large pressure will be generated Reduce the pressure burden on the pump station and pipe string, and the water flow velocity is higher, the sand particle velocity distribution is more uniform, and the nozzle wear distribution is relatively uniform. At the same time, the sandblasting machine uses the same diameter of the ball, and the management and operation are relatively simple. Secondly, the two-way sealing of the ball can avoid oil and gas backflow from polluting the wellhead. Finally, because the sand blasters installed at each stage are exactly the same, the management and installation of the sand blasters are also simpler, and the models of the production process are relatively reduced.

Description

Technical field [0001] The present invention relates to the technical field of oil exploration equipment, particularly as a sleeve-type blasting device and methods of use. Background technique [0002] See figure 1 , As a sleeve-type sandblasting, when the sliding sleeve is opened by sand blasting using pitching hold lamination method, sand blasting Kongkai Qi, so that the jet reservoir and the high cracks. [0003] In order to make the pitching into the target layer, layer by layer from top to bottom between the reduced diameter and the pitch corresponding to the sealing ball seat, on the one hand, that the flow diameter of the inner tube layer by layer reduction, since the lowermost end of the flow diameter is too small, is not achieved displacement injection, and the injection pressure in order to ensure the lower end of the pump station require higher pumping pressures, and the pressure of the pressure pipe system is also greater, reducing its service life, further, in the ca...

AI Technical Summary

Problems solved by technology

[0005] Furthermore, since the pitch decreases sequentially from top to bottom, the ball seat corresponding to the sand blaster also needs to gradually become smaller. When installing the sand blaster to the fracturing column, special attention must also be paid to the sequence, which improves equipment management. and installation difficulty

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