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английский) 2:
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To date, drilling practices are used and other submersible motors: electric drill, which is a special electric motor, which is supplied with a cable electric current; vibrobur whose motion is carried out by vibration; vintobur, which is a screw drive (screw pump "on the contrary").
Despite the great diversity of submersible motors, the bulk of drilling oil and gas wells is carried out rotary.
Schematically, the modern way of wiring (drilling) of the wellbore can be represented as follows (Fig. 2.1) . Porodorazrushajushchih device - the bit fitted with cutting blades or teeth, is rotated in a horizontal plane or a rotor by means of the pipe string (drill string), or deep motor (turbodrill, electric drills, screw motor), the cutting elements being introduced into the face under axial load exerted part kolon¬ny drilling, shearing the rock particles by the rotational movement and thus provides a recess and the bottom of the wellbore. Rinsing agent (air, water, aerated liquid, foam, drilling mud, oil, emulsion, etc.) is pumped drilling pressurized containers from the circulating system through the drill pipe a high davle¬niya, swivel the rotary barrel leading working tube (post kvadrat¬nuyu) rotatable rotor, drill bit and string to the bottom, picks fragments shattered rock bit and takes them through the annular passage between the drill string and the borehole wall to the surface. Once in the superficial circulation system, the washing agent is fed to the vibrating mesh screens, where a stand of drill cuttings and debris thrown into the blade, and screened or flushing agent supplied directly into the container and thence fed again into the borehole mud pump, or, if necessary, further purified by fine particles cuttings system hydrocyclones (sand separator for more coarse, desilter for fine cleaning) and from gas degasser, and then enters into the receptacle mud pumps.
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