Coiled tubing abrasive particle jet plugging removal device

Abstract

The invention belongs to the field of oil drilling and production, and particularly relates to a device capable of realizing block removing and production increasing via a coiled tubing and abrasive grain jet. The device comprises an abrasive grain storing tank, a spiral conveying machine, an abrasive feeding tank, an upper discharging hole, a lower discharging hole, a mixing cavity, a cement vehicle, a coiled tubing vehicle, the coiled tubing, a speed controller, a rotating spraying nozzle, an abrasive spraying nozzle, a sand control tool and the like. Through a special hole-hole structure, negative pressure suction and gravity action, stable, uniform and controllable abrasive grain feeding is achieved. The abrasive grain and completion fluid are conveyed to the underground rotating spraying nozzle by the coiled tubing. The high-speed abrasive grain jet ejected by the abrasive spraying nozzle can rapidly impact and break the blockage in sand control tools such as a sand control pipe column, a sand control gravel layer and the like, and can impact and break and clear shot hole blockage. Cracks on the interior of the strata and rocks are produced, stratum permeability is improved, oil and gas can enter the well bore smoothly, and yield of the oil gas well is improved.

Description

technical field [0001] The invention relates to a coiled tubing abrasive particle jet block removal and production increase device, which belongs to the field of oil drilling. Background technique [0002] With the continuous exploitation of oil wells, the water content of crude oil gradually increases, and the pollution and clogging problems in the vicinity of wells continue to intensify, resulting in a sharp decline in oil well production. If there is sand production in the formation, when the amount of sand is large, the oil layer may be buried directly. If the sand control pipe string and the sand control gravel layer are not damaged, the clay particles and fine silty sand particles in the formation will also fill and cement the sand control pipe or gravel layer cracks. Using high-pressure rotating water jets or self-vibrating cavitation jets to impact and vibrate on blockages, clean sand control string cracks, blastholes and other near-wellbore blockages, which can eff...

AI Technical Summary

Problems solved by technology

However, due to the limited impact energy of high-pressure water jets, the jet action distance is short, and for blockages with high hardness, due to the limited energy of the water jet itself, it is difficult for pure high-pressure water jets or self-vibrating cavitation jets The blockage is impacted and broken, and the plugging effect is not ideal for hard downhole blockages

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