«Onshore and offshore oil and gas well construction»

"Perfobur" technical system for secondary opening of a productive formation

UDC: 622.23.05
DOI: 10.33285/0130-3872-2022-2(350)-47-52

Authors:

¹ LLC "Perfobur", Moscow, Russia
² Ufa State Oil Technical University, Ufa, Russia

Keywords: well, productive formation, umbilical cable, sidetracking, screw downhole motor, inclinometer, orientating device

Annotation:

The article deals with the problems of secondary opening of a productive formation. Information on modern systems of cumulative, slotted hydro-sand-jet perforation and a number of others is presented, their disadvantages are assessed. The emphasis is placed on the technique and technology of a productive formation secondary opening of a well by drilling on aflexible drill string of multi-directional ultra-small channel of 58...71 mmdiameter, up to 15 m long and 5...12 m radius of curvature along the predicted and controlled trajectory. The assembly of "Perfobur" technical system is presented, which includes a ground-based umbilical cable as well as receiving-processing and borehole complexes. The downhole complex includes a drill bit, centralizers, small-sized sectional screw downhole motor, flexible non-magnetic drilling unit, orientating device, inclinometer, hydraulic loader – vibration damper, rigid pusher. The information transmission system consists of an inclinometer above the bit, which transmits information to the mother telesystem through a high-speed wireless electromagnetic channel and then through information fiber-optic channel passing through an umbilical cable to a ground receiving-processing complex. The technology has been successfully applied with the use of traditional tubing and units of various carrying capacities during the secondary opening of more than 70 wells using seven technological fleets.

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