| 摘要 |
A method for establishment of a new well path (5) from an existing well (1), wherein the existing well (1), at least in a portion where the new well path (5) is to be established, is delineated radially by a casing (21), and wherein the method comprises the following steps: (A) disposing and anchoring a plug base (23) in the well (1); (B) providing a plug (25) above the plug base (23) in the well (1) and along a longitudinal section (L1) thereof, wherein the plug (25), at least in a portion thereof, covers substantially the entire cross-section (T1) of the well (1); (C) removing a portion of the plug (25) in such a manner that at least a cross-sectional section (T3) of the plug (25) remains on the outside of the casing (21); (D) disposing and anchoring a direction-guiding element (27) in the well (1), and at least partially within the longitudinal section (L1); and (E) by means of the direction-guiding element (27), guiding a drilling tool (31) against the inside of the casing (21) in the existing well path (2) in order to form a hole through the casing (21), and through the remaining cross-sectional section (T3) of the plug (25) within the longitudinal section (L1), which opens up to formation of a new well path (5), wherein the method is characterized in that step (B) also comprises the following sub-steps: (B1) conducting a perforation tool (33) down into the casing (21) and to the longitudinal section (L1) where the plug (25) is to be set; (B2) forming holes (213) in the casing (21) and along the longitudinal section (L1) by means of the perforation tool (33); and (B5) pumping a fluidized plugging material down through the string (3) and out into the casing (21), thus also into the annulus (7) via the holes (213) in the casing (21). |
