BOREHOLE DEVIATION ZENITH ANGLE AUTOMATIC CONTROL DEVICE Russian patent published in 2010 - IPC E21B47/22 G01C9/00 

FIELD: oil-and-industry.

SUBSTANCE: device contains a rotor with an individual drive, an dismount device, an input device and a hoist with a brake. Additionally the device includes a zenith angle control device, a depth sensor, the depth sensor receiver, a path control bock, a memory device (MD), designed path and geology parametres storage block, a computing block (CB), a proportion block, an integrating block, a summator, and an actuator. At that the zenith angle control device and the depth sensor connected to the path control block input, which output connected to the MD, and the MD output connected with one of the CB inputs. The designed path and geology parametres storage block output connected to the CBs second input, which output connected to the sensor input. A master output connected with one of a solvers inputs, to the second input of which connected the receiver output. At that the receivers output connected to inputs of the proportion and integrating blocks, which outputs connected with summator input, connected to the actuator, which output connected to the hoist brake.

EFFECT: accuracy improvement and the borehole zenith angle deviation adjustment time consumption decrease.