INSTALLATION AND ATTACHMENT METHOD OF WEDGE-SHAPED DIVERTER IN HORIZONTAL WELLS, AND BOREHOLE HYDROMECHANICAL PUSHER FOR ITS IMPLEMENTATION Russian patent published in 2014 - IPC E21B7/08 

FIELD: oil and gas industry.

SUBSTANCE: cement bridge is installed in a well. A borehole hydromechanical pusher is fixed on the end of a drill string. An upper end of a wedge-shaped diverter is attached to the lower end of the pusher with shear screws. The diverter is lowered to the well till the cement bridge. An axial load on the drill string is created to unfasten the pusher casing and liquid is supplied for wedging up the pusher in a cased well bore and for cutting off the screws attaching the upper end of the wedge-shaped diverter to the lower end of the pusher. The pusher includes a hollow adapter the lower end of which is connected to a ram holder interacting with the ram. Inside the ram holder there is a longitudinal end-to-end channel. From the lower end onto the ram holder with possibility of longitudinal movement there led is a casing with a side opening for the ram. On the lower casing end there fixed is a sleeve with a limiting bushing, inside which there led is a hollow stock with a longitudinal channel inside it, which is shut off from below. The lower end of the hollow stock is connected with shear screws to the upper end of the wedge-shaped diverter. The lower end of the diverter is equipped with a fastening device.

EFFECT: fixation of a diverter in a well at impossibility of creating a load on a working face with the drill string weight, without using any additional equipment.

2 cl, 7 dwg