VIBRATORY WELL DRILLING Russian patent published in 2005 - IPC

FIELD: drilling equipment, particularly for vibratory well drilling.

SUBSTANCE: device has body, rod with through channel, nipple and dowel. Device is provided with pistons. Each piston is installed in protective bushing secured to the body and has contraction tube, diffuser and nozzle forming jet pump. Suction pump port is connected with piston underside cavity. Through rod channel has seat for ball arrangement providing partial liquid overflowing under the ball. Rod has branch pipes to turn liquid flow through 180° and channels connecting rock fracture area with unloading area created by reverse liquid flow supplied from branch pipes.

EFFECT: increased dynamic load applied to boring bit and improved bottom hole cleaning.

2 dwg