METHOD FOR CLEANING FACE-ADJACENT ZONE OF BED OF FORCE WELL WITH WASHING OF TRANSFER WATER DUCT Russian patent published in 2007 - IPC E21B37/00 E21B43/20 

FIELD: oil extractive industry, namely, methods for cleaning face zone of oil bed, making it possible to perform additional cleaning of water ducts and tubing pipes in force wells during operation of low penetrability beds or beds with worsened operation characteristics due to pollution of well-adjacent zone.

SUBSTANCE: in accordance to method, groups of low pickup and high pickup force wells are selected as single hydrodynamic system. Valves of water ducts are manipulated and liquid is discharged from low pickup force wells into high pickup force wells. In accordance to invention before beginning of forcing into low pickup force wells, in low pickup force wells with pickup below acceptable determined is the value of face pressure at mouth, which is supposed to provide for self-discharge of water from this well onto surface. Water is forced into current well via transfer water duct, after which rotation is induced onto flow. Water forcing is stopped and pause is sustained for separation of water pollutions in internal volume of tubing pipes. Liquid is discharged from current well into vessel in volume, providing for removal of separated particles. Forcing and discharge of liquid with sustenance of pause is performed cyclically until total volume of forced water exceeds volume of transfer water duct of this low pickup force well, and after pollution from lower part of tubing pipes appears in discharge, during discharge into groups of high pickup force wells, discharge from low pickup force wells with pickup below acceptable is transferred to utilization vessel.

EFFECT: decreased pickup loss for low penetrability beds, removal of hard particles from high pressure transfer water ducts, increased time between cleaning of face zone of force wells and savings in material costs of maintenance of bed pressure.

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