PDC BIT FOR HORIZONTAL WELL DRILLING Russian patent published in 2014 - IPC E21B10/43 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to drilling bits used in construction of deep oil and gas wells, mainly for horizontal wells. PDC bit for horizontal well drilling has a body with a connecting thread, PDC rock cutting elements placed in sequence at one or more lead-in conical screw blades divided by conical spiral grooves with openings for attachments and passage of the flushing fluid. The bit peak is made as an elongated protrusion with the diameter base equal to d=(0.6÷0.7)D and height of h=(0.4÷0.6)D from the outer diameter B of the bit equipped with PDC-elements placed in planes close to the ones parallel to the axis of the bit, at two or more blades and flushing openings with attachments that forms at drilling a preliminary niche and conical screw blades from there cut the rock remaining at the well wall with an increased self-screwing effect.

EFFECT: improvement of drilling mechanical speed, stabilisation of cutting structure operation.

3 dwg