Lifting and hanging type oil drainage device
The utility model relates to a subsurface tool for oil well operation in oilfield, in particular to a lift type oil drain device, which comprises an upper joint, an oil drain tube, a central tube, an oil drain pin, and a lower joint that are connected in sequence, the upper joint and the oil drain t...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model relates to a subsurface tool for oil well operation in oilfield, in particular to a lift type oil drain device, which comprises an upper joint, an oil drain tube, a central tube, an oil drain pin, and a lower joint that are connected in sequence, the upper joint and the oil drain tube are connected together by an oil tube clasp, the upper part of the central tube is embedded inside the upper joint, the lower part of the central tube is connected with the lower joint, the oil drain pin is arranged at lower part of the oil drain tube, the root of the oil drain pin is arranged in the corresponding annular groove of the central tube, the oil drain tube and the central tube are positioned by the oil drain pin, two oil drain holes are symmetrically arranged below the oil drain tube; two long axial grooves are symmetrically arranged in inner cavity at lower part of the upper joint; two clawing sheets are symmetrically in the cavity at upper part of the central tube. The device is applied for oil we |
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