DEVICE FOR INSTRUMENT LOWERING IN WELL Russian patent published in 2007 - IPC E21B47/01 E21B19/00 

FIELD: oil production, particularly for deep well survey.

SUBSTANCE: device comprises post, fork, roller with pin and stop. Fork has cuts made in two fork sides in upper part thereof and extending at an angle to longitudinal fork axis. Cuts have lengths enough for linear roller pin movement along inclined cuts for optimal distance in the case of vertical fork position and for horizontal roller pin and roller displacement along said inclined cuts. Two threaded pairs including bolts and nuts are located in two fork sides under the inclined cuts so that the pairs extend along axial lines of the cuts to regulate roller axis position along inclined cut lengths. In optimal roller pin position with respect to inclined cuts roller pin is additionally retained with the use of two bushes and nuts connected to roller pin from outer fork side.

EFFECT: extended service life of scratch wire and gland seal, prevention of expensive instrument falling in well, provision of wire position adjustment in horizontal direction between the nearest positions thereof.

2 dwg