METHOD FOR PRODUCTIVE BED SIMULATION AND DEVICE FOR ITS REALIZATION Russian patent published in 2004 - IPC

FIELD: oil extracting industry.

SUBSTANCE: during stimulation of productive bed, periodical driving attack on stimulated range of bed is performed by means of working substance under excessive pressure. Before the flow of working substance vacuum is formed. Driving attack is concentrated in direction of stimulated range by symmetrical pressure exit in pairs towards stimulated range at height equal to range of stimulated bed perforation. Pressure leak into the well from stimulated range is limited and pressure in stimulated range is supported up to its equalization with pressure in well-adjacent area. Device has body in form of two connected cylinders, upper one having larger diameter and lower one having smaller diameter, with a safety valve, and a plunger with damped ends, which is placed in lower cylinder of body with capability for reciprocal movement and exiting into upper cylinder of body. Device is equipped with pressure concentrator, located lower than safety valve. Pressure concentrator is made in form of pipe with openings located evenly in pairs. In upper and lower portions the pipe is provided with large and small shelves, between which collars are placed for covering spaces between large shelves and well walls in case of pressure between the collars. Space between collars is made no less than stimulated bed range.

EFFECT: higher effectiveness of driving attack on a productive bed.

2 cl, 1 ex, 1 dwg