BOTTOMHOLE DRILLING EQUIPMENT WITH INDEPENDENT EJECTOR PUMP Russian patent published in 2006 - IPC E21B21/08 E21B7/20

Abstract RU 2288342 C2

FIELD: device and method for drilling oil deposits at decreased hydrostatic pressure on well borehole.

SUBSTANCE: bottomhole drilling equipment contains device with ejector pump, connected to casing string, drilling bit, connected to drilling column. During operation device with ejector pump remains stationary. Drilling column passes through device with ejector pump. Drilling bit is made with possible operation independently from ejector pump device. Ejector pump has elastic insert, which swells for redirection of flow of drill mud and extracted fluid from internal circular space into device with ejector pump. For swelling of insert fluid under high pressure is used.

EFFECT: increased extraction efficiency, decreased wear of equipment, lower costs.

7 cl, 11 dg

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RU 2 288 342 C2

Authors

Kh'Juz V. Dzhejms

Renfro Dzhimmi Dzhosh

Dates

2006-11-27—Published

2002-09-03—Filed