DEVICE TO CONTROL WELL PARAMETERS DURING WELL OPERATION Russian patent published in 2006 - IPC E21B47/00 

FIELD: well survey, particularly to survey wells drilled in multizone reservoir during operation thereof and to control well parameters without disturbing of well operation in flow or gas-lift modes or with the use of mechanized sucker rod pump or centrifugal pump.

SUBSTANCE: device comprises winch with borehole cable, wellhead equipment, land-based measuring system and borehole instrument assembly. The instrument assembly is made as measuring module system connected one to another in series through tube sections. Upper tube section is attached to bottom part of well product rising pipe through intermediate perforated chamber. Number of modules is equal to n-1, where n is number of productive reservoir zones of the well. In the case of well with increased wellhead pressure operation the intermediate perforated chamber is rigidly connected with bottom part of flow string. During mechanized well operation intermediate perforated chamber is secured to lower end of flow string under pump intake.

EFFECT: possibility of simultaneous control of all well parameters, increased reliability, possibility to obtain information from inclined, horizontal and inverse wells.

3 cl, 2 dwg