DIRECTIONAL DRILLING COMMUNICATION PROTOCOLS, APPARATUS AND METHODS Russian patent published in 2018 - IPC E21B47/12 E21B7/04 

FIELD: drilling of soil or rock.

SUBSTANCE: invention relates to the field of directional drilling and can be used for data transmission. In particular, there is provided an apparatus for obtaining and transmitting operating parameters of an inground tool for use in conjunction with a system for performing an inground operation in which a drill string extends from a drill rig to an inground tool such that extension and retraction of the drill string produces corresponding movements of the inground tool during the inground operation. Said apparatus comprises: a transmitter configured to be carried proximate to the inground tool for sensing a plurality of operational parameters relating to the inground tool, and for detecting whether the operating status of the inground tool is stationary or moving, as well as changes in operating status, and for transmitting data characterising one or more operating parameters with a higher resolution when the inground tool is stationary and with a lower resolution when the inground tool is moving; and a receiver for positioning at an aboveground location for receiving the data signal and for recovering the operational parameters.

EFFECT: higher transmission capacity.

33 cl, 6 dwg, 3 tbl