WELL JET DEVICE ON A FLEXIBLE SMOOTH PIPE FOR EXAMINING HORIZONTAL WELLS

摘要

The invention relates to pumping engineering, mainly to jet pumps used for testing and developing wells. The optimal structural design for the device including the use of a flow switch, which is introduced therein and is embodied in the form of a steady bush spring-loaded with respect to a body, makes it possible to increase the operational reliability and the performance of a well jet device during the treatment of a production formation of a horizontal well. The inventive bush is provided with a support flange which is arranged in the bore of the body in such a way that an annual channel is formed communicating with the annular space by means of a channel embodied in the jet pump body. The bush is provided with bypass holes and a mounting seat for a sealing unit which is run down through a flexible smooth pipe