METHOD FOR EXAMINING AT LEAST TWO LAYERS OF DEEP DRILLINGS PARTICULARLY TEST HOLES AND PLUG FOR CARRYING OUT THE METHOD

摘要

A closure plug is lowered by means of a wire rope into the well which is already provided with a liner pipe, cemented into position and filled. The plug is located at the desired depth by the potential energy of the filler liq. the prodn. pipe is then installed. The performation and examination of the layers are carried out through the prodn. pipe. The closure plug is to be equipped with a hydraulic seal mechanism. Also included is a design of closure plug, such that it can be operated by the static energy of drilling mud in the well, and is also suitable for sealing the well against liq. or gas indefinitely and regardless of pressure. The method involves initiating the seating of the closure plug be a pulling action and afterwards lifting out the seating tool. - The method enables the examination and prodn. from layers in nay order, regardless of their position.