METHOD FOR OPENING PRODUCTIVE BED FROM WELL AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2005 - IPC

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes drilling perforation channels in wall of casing string and behind-pipe space, by drill. Drill is extended after each deepening for a length of its rod. Assembly for feeding drill is detached from received combined rod, left in drilled channel. Drill is provided with guiding elements, placed at distance from each other for keeping drilling direction. Firstly, wall of casing pipe is drilled by cutting portion of guiding element when it is in conductor of feeding assembly. With displacement into wall of casing string, another guiding element is inserted into conductor. With drilling of casing string, concurrent presence of guiding elements in feeding assembly conductor and in formed channel is provided for, said channel being used as conductor for drill after exit of guiding elements from feeding assembly conductor. Device has drilling perforator, containing electronic block, electric drive, fixing assembly, assembly for feeding drill with conductor, and case block with inbuilt cases containing drilling rods and drill. Drill is provided with guiding elements, having elliptic shape, placed at distance from each other along drill axis and turned relatively to each other for 90°.

EFFECT: higher reliability.

2 cl, 6 dwg