HYDRAULIC CONTROL OF DEPLOYMENT OF WELL TOOL Russian patent published in 2017 - IPC E21B21/10 E21B34/14 

FIELD: mining.

SUBSTANCE: drill string control mechanism is configured to activate the drill string tool through hydraulic movement of the switching element in the activated position, at the same time drilling fluid is used as the working medium. Movement of the switching element in the activated position is adjusted automatically, and therefore the activation of the tool depends on the threshold parameters of the drilling fluid in the well exceeded at least within the preset switching length. The switching regulator that controls movement of the switching element in the activated position, may be configured to adjust the speed of the switching element so that substantially constant swithing length is maintained regardless of pressure fluctuations in the parameters of the drilling fluid in the well above the threshold.

EFFECT: provision of hydraulic control deployment of the well tool.

24 cl, 6 dwg