WELL JET DEVICE FOR LOGGING AND DEVELOPING HORIZONTAL WELLS WITH ABNORMALLY LOW FORMATION PRESSURE

摘要

A logging instrument, movably arranged sealing unit and jet pump mount on a flexible smooth pipe. Pump diffuser output connects to the annular space, the nozzle thereof connected to the pipe inner cavity. An in-channel return valve supplies pumped out medium. Circulation valves are arranged in the tubing string above the packer and carrier ring with an opening for mounting an element is disposed above said circulation valves. The element is in form of a body filled with elastic space plates set and thrust washers and thrust pressure element situated thereabove. Support socket with thrust flange made on lower end thereof and with movable thrust collar mounted thereon secures in a body lower part. A sealing ring is placed between the thrust collar and the lower part of a body. The invention increases operational reliability and productivity of the device during treatment of a productive formation and well testing.