Pulse jet type cuttings bed breaker

The invention relates to a pulse jet type cuttings bed breaker, and belongs to the technical field of downhole tools. The debris bed breaker is composed of an upper connector and a lower connector, the lower connector is arranged at the front end of the upper connector, a reciprocating pressurizatio...

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Bibliographische Detailangaben
Hauptverfasser: XIA CHENGYU, HOU ZUOFU, HUANG JIAN, HAN XUEYING, GUO LIANGLIN, LI JUNXIONG
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention relates to a pulse jet type cuttings bed breaker, and belongs to the technical field of downhole tools. The debris bed breaker is composed of an upper connector and a lower connector, the lower connector is arranged at the front end of the upper connector, a reciprocating pressurization mechanism is installed on the upper connector, and a pulse jet device is installed between the reciprocating pressurization mechanism and the lower connector through a middle connector. An eccentric block is arranged at the bottom of the middle of the pulse jet device, and cavitation jet nozzles are arranged on the pulse jet device on the two sides of the eccentric block respectively. The rock debris bed breaker can keep the pulse jet device not rotating, so that the cavitation jet nozzle can intermittently communicate with the jet hole moving to the bottom in the rotating process, pulse cavitation jet is conducted on rock debris, the rock debris at the bottom of an annulus is effectively cleaned, and mud drums c