STABILISER WITH CONTROLLED STRAIGHT BLADE Russian patent published in 2017 - IPC E21B17/10 E21B19/24 E21B7/08 

FIELD: mining.

SUBSTANCE: stabiliser, according to one of the embodiments, comprises a body with a longitudinal axis, the body comprising an elongated cavity formed in the outer surface of the body, an elongated blade of the stabiliser with a path formed along the inner surface of the blade, a sliding block, an elongated shaft and a guide assembly. When the sliding block contains the upper part, the lower part and through threaded hole, formed in a block along the axis of the hole. The oblong shaft comprises a first end, and a second end, and an outer surface, at least a portion of which a thread is formed between the first end and the second end, the threaded surface of the shaft being engaged with the through threaded hole of the sliding block. The guide assembly comprises a first track and a first follower that slidably mounts the lower portion of the sliding unit to the housing and a second track and a second tracking element that slidably mounts the upper portion of the sliding unit to the detachable blade.

EFFECT: ability to adapt to wells of various sizes, to regulate the position of each blade independently of the other blades.

20 cl, 12 dwg