Jet Borehole Cleaning Tool

Abstract

The invention relates to a jet-type wellbore cleaning tool. The rotary disk of the jet-type wellbore cleaning tool is arranged between the step of the shell joint and the upper end surface of the lower joint, and the upper valve block and the lower valve block are respectively fixed on the rotary disk and the In the annular cavity between the shell joints, the annular cavity between the two valve blocks is a liquid storage cavity, and the rotating disk corresponding to the liquid storage cavity is uniformly provided with rotating jet holes, and the upper valve block and the lower valve block are respectively arranged in pairs. The water hole and the rubber groove, each water inlet hole communicates with the liquid storage chamber, and each rubber groove communicates with the inner cavity of the shell through the rubber hole, the liquid inlet groove is set on the switch rod of the rubber switch, and an inlet is set between the switch head and the rubber groove. Water spring; two sliding blocks are arranged on the inner wall of the shell joint, each sliding block blocks a group of rubber holes below it when sliding down, and a starting spring is arranged between the lower end surface of the sliding block protrusion and the sliding groove. In the present invention, when the jet flow stops, the rotation also stops thereupon, and it is automatically closed, which will not interfere with the normal drilling process.

Description

Technical field: [0001] The invention relates to a wellbore cleaning device in the field of petroleum engineering, in particular to a jet-type wellbore cleaning tool. Background technique: [0002] Wells with complex structures such as horizontal wells and extended-reach wells can maximize the drainage area of ​​reservoirs and improve oil and gas recovery, and are widely used in the development of offshore oil and gas fields, the stable production increase of old oil fields, and the development of low-permeability oil and gas fields. However, in horizontal wells and extended-reach wells, the accumulation of cuttings to form the cuttings bed is common. The existence of the cuttings bed will reduce the annular gap, which may easily cause the possibility of poor pump and stuck pipe. In the area where the drilling tool deviates seriously from the center of the wellbore, due to the formation and existence of the cuttings bed, the torque of the drilling tool increases, making it d...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a jet-type wellbore cleaning tool, which is used to solve the problem of increased frictional resistance, increased drilling time, and increased drilling time due to the formation of cuttings beds during the drilling process. job cost problem

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