Hydraulic jetting multi-nozzle radial drilling device
The utility model relates to the technical field of well drilling downhole tools, discloses a hydraulic jetting multi-nozzle radial drilling device and aims at solving the problems in the prior art that a radial drillhole is short in horizontal length and small in diameter due to the fact that tract...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model relates to the technical field of well drilling downhole tools, discloses a hydraulic jetting multi-nozzle radial drilling device and aims at solving the problems in the prior art that a radial drillhole is short in horizontal length and small in diameter due to the fact that tractive force of a front-end jet nozzle is limited. The hydraulic jetting multi-nozzle radial drilling device comprises a sleeve, and a steering device is arranged in the sleeve. The upper end of the steering device is connected with a first oil pipe through an x-over joint. A coiled tubing is arranged in the first oil pipe. A guiding channel is arranged in the steering device. A high-pressure jet hose which is communicated with the top and the sidewall of the steering device is arranged in the guiding channel. The starting end of the high-pressure jet hose is connected with the lower end of the coiled tubing. The tail end of the high-pressure jet hose is connected with the front-end jet nozzle. At least two middle noz |
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