DEVICE FOR LOWERING OF GEOPHYSICAL CABLE OF "RIGID" STRUCTURE TO WELL UNDER HIGH PRESSURE Russian patent published in 2020 - IPC E21B19/08 E21B33/72 

FIELD: geophysical and hydrodynamic investigations.

SUBSTANCE: invention relates to geophysical and hydrodynamic research and can be used in oil industry, mainly when investigating flowing wells with high well head pressure. Disclosed is a device for lowering a geophysical cable of a "rigid" structure to a well under high pressure, comprising a blowout preventer, a lubricating signal device, a receiving chamber of a lubricator, a well mouth sealer of a cable, intra-packing mechanism of cable pushing located between receiving chamber and chamber of cable sealer, and intra-lubricating top roller. At that, the top roller of the geophysical cable suspension system, placed in a separate housing and included in the internal cavity of the lubricator, is made in the form of small rollers located along the arc envelope inner envelope, bending diameter corresponding to the diameter of the upper roller required for the design of the "rigid" geophysical cable. Mechanism of its pushing is long-stroke and is located in descending branch of lubricator in separate housing. At that, hook and pushing element hooks mechanisms, as well as cable braking element, during pushing element idling stroke, are arranged in "sparing" cable in shell mode, namely by pressing the cable with elastic conical clamping elements located between rigid cone supports.

EFFECT: analysis of wells by geophysical instruments at high pressure at the wellhead, use of a "rigid" structure geophysical cable for suspension of devices and their pushing on inclined sections of the well shaft without deforming the cable.

10 cl, 6 dwg