METHOD FOR GEOPHYSICAL SURVEY OF HORIZONTAL WELLS WITH INCLINED WELLHEAD Russian patent published in 2024 - IPC E21B23/14 E21B47/00 B66D1/395 

FIELD: mining; measurement.

SUBSTANCE: invention relates to a method for geophysical survey of horizontal wells with inclined wellhead. Method involves delivery of geophysical instruments to the survey zone of the horizontal section of the borehole with an inclined wellhead using a geophysical cable. Geophysical cable is placed in the system of the roller suspension of the geophysical cable, which is located along the line of cable movement outside the zone of the wellhead. Geophysical cable is passed through rollers of a roller suspension system, a wellhead centraliser, cable dockers, housings with pushers equipped with end stops and connection elements, and a rotary assembly, a receiving chamber connected to the wellhead. Housings of pushers are connected to rotary-labyrinth flow switch of pumped liquid, equipped with expansion chambers to prevent hydraulic impacts and a bypass line with a pressure valve connected to the pump unit. Cable pushers move in opposite directions relative to each other, using energy of process fluid pumped through closed chambers of their housings.

EFFECT: higher efficiency and reliability of survey of inclined wells.

1 cl, 2 dwg