| 摘要 |
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 |
