METHOD AND DEVICE FOR LIMITING LONGITUDINAL FLUID FLOW AROUND PERMEABLE PIPES IN WELL Russian patent published in 2005 - IPC

FIELD: oil and gas wells, particularly to reduce longitudinal fluid flow through hole annuity.

SUBSTANCE: method involves installing at least one resilient sealing ring around permeable pipe before lowering thereof into the well; holding the ring into compressed state around the pipe with the use of band or/and binding member which is gradually solved in well medium; installing permeable pipe in supply well area; providing band or/and binding member solving to provide expansion of at least part of sealing ring in radial direction in hole annuity surrounding permeable pipe. Sealing device has a number of sealing rings spaced equal intervals and installed on permeable pipe inside the well. Each sealing ring has one end permanently connected with outer pipe wall and another resilient end formed as a flange.

EFFECT: increased efficiency.

6 cl, 4 dwg