Downhole blowout prevention pressure maintaining drilling device
The utility model provides an underground blowout-preventing pressure-maintaining drilling device, which relates to the technical field of drilling and comprises a base, a multi-stage hydraulic telescopic cylinder and a drilling mounting seat, the multi-stage hydraulic telescopic cylinder is mounted...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model provides an underground blowout-preventing pressure-maintaining drilling device, which relates to the technical field of drilling and comprises a base, a multi-stage hydraulic telescopic cylinder and a drilling mounting seat, the multi-stage hydraulic telescopic cylinder is mounted on the upper right portion of the base, an upper fixing sleeve is mounted at the lower end of the multi-stage hydraulic telescopic cylinder through a plurality of groups of fastening bolts, and a lower fixing sleeve is mounted at the lower end of the upper fixing sleeve through a plurality of groups of fastening bolts. A first motor is arranged in the upper fixing sleeve in a sleeved mode, a rotating shaft is installed at the lower end of the first motor, the lower end of the rotating shaft is fixed to a drill rod, an outer sleeve is arranged on the lower portion of the upper fixing sleeve and arranged on the outer side of the upper portion of the drill rod in a sleeving mode, the drill rod penetrates through the |
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