BOREHOLE SEPARATOR Russian patent published in 2015 - IPC E21B43/38 

FIELD: oil and gas industry.

SUBSTANCE: borehole separator contains a gas gathering chamber connected with well cavity, a gas pre-separation assembly with spiral winding in form of a screw outside, creating the flow channel connected by holes in the screw body with its axial channel, a flow divider, a fluid drainage branch, a partition, a connecting branch. The device has a parker connected with a stem, in its axial channel a seat is installed. The fluid drainage branch is equipped with support washer and is connected by top end with the flow divider equipped with supply channels hydraulically connected the screw axial channel with the sleeve cavity rigidly connected with the flow divider and installed creating the ring chamber with connecting branch hydraulically connected with the drain channels in the flow divider with the axial channel of the fluid drainage branch. The flow divider is installed inside the connecting branch and is equipped with stem having baffle plates, at its top end the partition and seating head with process groove are installed. The screw axial channel is permanently hydraulically connected by hole in the fluid drainage branch body with its axial channel.

EFFECT: increased efficiency of fluid separation from gas/fluid flow with its discharge to well under was/water boundary.

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