SYSTEM FOR MONITORING THE MUTUAL ORIENTATION OF WELLBORES DURING CLUSTER DRILLING

摘要

FIELD: oil and gas industry. ;SUBSTANCE: invention relates to the field of the oil and gas industry, namely to the construction of wells during cluster drilling using telemetry systems to control the direction of drilling. In particular, a system for monitoring the mutual orientation of wellbores during cluster drilling is proposed, which contains a deep part in the form of a downhole electromagnetic telemetry system of a drilled well and at least one production string located in a previously drilled well, and surface equipment. In this case, the surface equipment includes a linear receiver of an electrical signal consisting of an adder, a filter, a linear amplifier, an analog-to-digital converter, a microcontroller and a travelling block position detector, which are connected in series. The inputs of the adder receive the signals from the antenna of the drilled well and from the second antenna the function of which is performed by the production well string. The microcontroller is connected via an interface to a personal computer. The controlled parameters during drilling are the exact depth of the bottom, calculated using the travelling block position detector, as well as the voltage of the received signal and information about the current of the emitted signal into the rock near the dipole region, received on the surface using a linear receiver between the wellhead of the drilled well, which performs the function of the first antenna, and a production string of a previously drilled well, which serves as the second comparison antenna.;EFFECT: invention increases the reliability of control of the orientation of the boreholes relative to each other and ensures a safe approach of the drilled well with the previously drilled one.;1 cl, 2 dwg