FIELD: oil and gas industry.
SUBSTANCE: invention group refers to carrying out operations in number of wells through one main bore with operations of simultaneous drilling and completion with one rig. The concept of the invention is as follows: the system for operation of number of wells with annular space, having possibility of connection by fluid through one main bore, contains at least one casing, at least one chamber forming annular space, which has possibility of connection by fluid with number of wells, and the first channel having possibility of connection with at least one casing and number of additional channels. Each of those channels has possibility of connection with a selected well out of number of wells. The system contains a tool for well selection of a required size for insertion through the first channel and having possibility of connection with at least one additional channel out of number of additional channels and containing upper opening with possibility of connection with the first channel, and at least one lower opening with possibility of return connection with number of additional channels. Each bottom opening is designed with possibility of selective connection with one out of number of channels. At that, the tool for bore selection prevents from connection with at least one of the additional channels.
EFFECT: invention provides for increasing the efficiency of well conditioning and operation.
33 cl, 97 dwg
