METHOD FOR DELIVERING A GEOPHYSICAL DEVICE INTO A HORIZONTAL WELL Russian patent published in 2007 - IPC E21B47/01 

FIELD: oil industry, possible use during operation of a well with horizontal or inclined shaft.

SUBSTANCE: in accordance to the invention, technological column is installed, consisting of upper part of tubes and lower part in form of cylindrical spring with internal diameter exceeding the external diameter of geophysical device. Upper part of technological column is connected to tubing pipe column by means of detachable connection. During lowering, geophysical device is positioned lower than technological column, abutting on the technological column. Then technological column is disconnected from tubing column and lowered into the well together with the geophysical device. During lifting, technological column is connected to tubing column. Then, firstly geophysical device is raised from the well via internal space of technological column and tubing column, and then tubing column is raised from the well together with technological column.

EFFECT: prevented bending stresses on cable from pipes while preserving capacity for pushing device through into horizontal or inclined well shaft and for freeing geophysical device and cable in a well from pipes.

2 dwg, 1 ex