DEWAXING SCRAPE AUTOMATIC DEVICE Russian patent published in 2011 - IPC E21B37/02 

FIELD: gas and oil production.

SUBSTANCE: device consists of electric engine-reducer, of drum for winding scrape wire, shaft of which is mounted on output shaft of electric engine-reducer, and of vertical pole rigidly attached to tube of lubricator with fastening unit. The electric engine-reducer is rigidly secured on an upper end of the vertical pole at a platform at negative angle to horizon from 10 to 20°. A removable device for control over tension of scrape wire and a device of precision control of position of the drum shaft relative to centre of a well are fixed lower on the vertical pole. The device of precision control is equipped with facilities for smooth precision change of value of turn of the vertical pole around its lengthwise axial line in the fastening unit and with devices for fixation of a set position. A free end of wire is tied to a scrape in the lubricator. An orifice for oil filling in the reducer is simultaneously a mark of a maximal allowed level of oil in the reducer.

EFFECT: increased reliability of operation due to reduced probability of emergencies; simplified usage.

5 cl, 6 dwg