Continuous sand blasting tool

Abstract

The invention relates to a continuous sand blasting tool which includes an internal oil pipe and an external oil pipe. The continuous sand blasting tool is characterized in that the upper end of the internal oil pipe is provided with a compensation type sand blasting sealing tool, the lower end of the external oil pipe is provided with a buffer sand blasting suspension tool, and the lower end of the internal oil pipe is provided with a sitting type strong jet flow sand blasting tool; the compensation type sand blasting sealing tool includes an upper joint I, a central tube, a piston and a sealing sleeve, a packing cup is arranged between the upper joint I and the sealing sleeve, and a piston slides freely on the central tube; the buffer sand blasting suspension tool includes an upper jointII and a lower joint, the upper joint II and the lower joint are connected by threads, and a spring component is arranged in an inner cavity formed by the upper joint II and the lower joint and in front of a plug; and the sitting type strong jet flow sand blasting tool includes an outer tube, a sealing sleeve and a pen tip, the lower end of the pen tip is sequentially in threaded connection to aconstant pressure ball seat, an inner spring seat I, an inner spring seat II and a sand blasting opening. The device can avoid sand blocking and pump blocking, speeds up the process of sand blasting,reduces use of sand blasting liquid and improves the sand blasting efficiency.

Description

technical field [0001] The invention relates to the field of oilfield operations, in particular to a continuous sand washing tool. Background technique [0002] In the production process of oil and water wells, due to the sand production in the oil layer and the engineering sand filling, the sand surface will be partially or completely filled with the oil layer. If the liquid flow in the well cannot bring all the sand production to the surface, the sand in the well will gradually precipitate and the sand column will increase. Blocking the oil outlet channel will increase the flow resistance, reduce or even stop the production of the oil well, and at the same time damage the downhole equipment and cause downhole sand stuck accidents. Therefore, the wellbore must be flushed clean and the production channel established. Hydraulic sand washing is to inject liquid into the well at high speed, rely on hydraulic action to disperse the sand at the bottom of the well, and use the car...

AI Technical Summary

Problems solved by technology

At present, the sand washing tools are relatively simple, and can only be connected to a single oil pipe continuously, and the pump needs to be stopped on the ground

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