Downhole particle jet perforating device

Abstract

The invention relates to the field of oil drilling and completion, in particular to a downhole particle jet perforation device comprising a particle injection tank, a perforated short circuit, a retractable perforating nozzle, a fixed perforating nozzle, and a pilot drill bit. The high pressure mud and particles are mixed by the particle injection tank to reach the perforation short circuit, ejected from the retractable perforating nozzle and the fixed perforating nozzle at an adjustable angle to quickly penetrate the casing, the cement ring and the formation rock, and the pilot drill bit is mounted on the lower part of the perforation short circuit. The retractable perforating nozzle can achieve large depth perforation, and the perforation depth can be adjusted, the position, type and quantity of the retractable perforating nozzle and the fixed perforating nozzle can be selected according to the actual needs of the site. The downhole particle jet perforation device can effectively improve the efficiency of the downhole perforation operation, increase the perforation depth and the working area, enhance the fluid flow capacity of the stratum, and effectively improve the reservoir productivity.

Description

technical field [0001] The invention relates to a downhole particle jet perforating device, which belongs to the field of petroleum drilling and completion. Background technique [0002] After the drilling and cementing operations are completed, the wellbore and the reservoir are closed. Usually, the perforation method is used to connect the reservoir and the wellbore. The pores formed after the perforation operation can allow the oil and gas fluid in the reservoir to enter the low-pressure wellbore, and finally transported to the wellhead for extraction. In conventional perforating operations, after the perforating gun is lowered to the predetermined position, the radial perforating bullets pass through the casing and the cement sheath and enter the formation. Usually, the perforating bullets form a cone-shaped perforation tunnel, and the diameter of the tunnel becomes smaller as it goes into the formation. Small, due to the limited energy of the perforating bullet, the de...

AI Technical Summary

Problems solved by technology

At present, perforating gun is still the main method of perforating operation, and the development of new perforating technology has also overcome some shortcomings of conventional perforating gun operation, especially the development of artillery shell technology in the military field has also accelerated the development of perforating operation technology , but as the formation depth increases, the effect of perforating gun perforation is often not very good

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