METHOD OF DOWNHOLE TOOLS DELIVERY TO BOTTOMS OF DRILLED WELLS WITH COMPLEX PROFILE, CARRYING OUT GEOPHYSICAL SURVEY AND COMPLEX FOR ITS IMPLEMENTATION Russian patent published in 2016 - IPC E21B23/14 E21B47/01 G01V5/00 

FIELD: oil industry.

SUBSTANCE: group of inventions relates to oil industry and can be used for delivery of downhole tools. Method of downhole tools' delivery to bottoms of drilled wells with complex profile and performance of geophysical survey is characterized by that logging instruments are connected to instrument bridge, in upper part of which lower drill pipe is screwed and by means of their growth instruments are lowered to specified depth. Wellhead and suspended rollers are installed, cable contact tip is placed inside top drilling pipe, which is mounted on single- or triple-strand geophysical cable, which is first passed through cable entry device gland. After that device is screwed in lock part of pipe and geophysical cable with cable contact tip under control of measurement systems of logging station is lowered to depth of location of instrument bridge for performing process operations at joining and fixation of electric contacts of devices of cable contact tip and contact unit. Depending on well conditions, joining and fixation for establishing connection with logging instruments are performed as under weight of contact tip, so by its pumping with flushing fluid. Geophysical cable is fixed in cable clamp, pull-off roller is mounted, and by performing synchronous lowering-lifting of cable and drill pipes with logging instruments in control of axial forces on them, geophysical survey is performed. Method is implemented by means of complex for downhole tools delivery to bottoms of drilled wells with complex profile and performance of geophysical surveys in form of assembly, including instrument bridge with sub, cable contact tip and input device of geophysical cable.

EFFECT: technical result consists in improvement of reliability of downhole tools delivery.

3 cl, 4 dwg