DRILLING TOOLS COMPONENTS ROTARY ANCHOR ATTACHMENT Russian patent published in 2017 - IPC E21B23/01 E21B7/06 E21B4/18 

FIELD: mining.

SUBSTANCE: group of inventions relates to drill strings components for drilling operations, and specifically to downhole tool assembly, rotary anchor device and drilling rig. Downhole tool assembly contains practically not rotating housing, made for virtually coaxial relative to rotating mounting on drill pipe; anchor element, made for resistant to rotation engagement with borehole wall, sensitive to radially directed contact with borehole wall; anchor joint, providing of anchor element with housing detachable connection in such manner, that anchor joint radial expansion change was synchronously connected to radial gap change between housing and anchor element. Anchor joint comprises plurality of functionally related mounting connections, installed on housing for rotation around corresponding attachment axes, which are practically parallel to each other, with fixed spatial mutual arrangement. To anchor joint drive mechanism is connected for anchor joint radial expansion initiation due to motive force application to anchor joint. Effect force angular orientation relative to housing is variable depending on anchor joint radial expansion change. Anchor joint contains one and more rigid connections of constant length and variable connection, which is dynamically variable both by length, and by angular orientation depending on anchor joint radial expansion change.

EFFECT: technical result consists in improvement of rotary anchor mechanism reliability, providing efficient transmission of torque between geologic horizon and housing with its longitudinal movement along well walls.

28 cl, 9 dwg