METHOD FOR FORMATION DRILLING USING DRILLING PERFORATOR, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC E21B43/11 

FIELD: oil and gas industry.

SUBSTANCE: formation is drilled by means of a drilling perforator in the following way: lowering of the perforator using a cable with a cable end to the formation drilling interval in the well, subsequent drilling of channels in the well wall at each turn of the perforator; at that, the channels are drilled in the well wall from lower point to upper point of the drilling interval with the specified pitch of the perforator movement in vertical plane, and before each turn, the perforator is lifted to the surface; the perforator is turned by means of a turning gear to the specified angle, and its position is fixed relative to the cable end, then, the assembly is lowered to the well and the next channel is drilled, which is offset from the previous channel through the specified angle.

EFFECT: increasing the well drilling efficiency as a result of reticular perforation of the well wall throughout the drilling interval, simplification and cheapening of the devices performing that perforation.

2 cl, 7 dwg