摘要:
A method is for establishment of a new well path from a well. The method comprises disposing and anchoring a plug base in a casing in the well; lowering a perforation tool into the casing; forming holes in the casing along a longitudinal section; pumping a flushing fluid out through outlets in a flushing tool and into the casing and further out into an annulus; pumping a fluidized plugging material out through the flushing tool and into the casing and further out into the annulus; placing the fluidized plugging material along the longitudinal section so as to form a plug across a cross section of the well; wherein the outlets in the flushing tool are angled non-perpendicularly relative to a longitudinal axis of the flushing tool. The method also comprises removing a portion of the plug until a cross-sectional section of the plug remains in the annulus; disposing and anchoring a direction-guiding element in the casing within the longitudinal section; by means of the element, guiding a drilling tool against the inside of the casing; and forming an exit hole through the casing and the cross-sectional section of the plug, thereby allowing a new well path to be formed from the well.
摘要:
A method for isolation of a permeable zone (10, 11) in a subterranean well (1), wherein the well (1) is provided with a pipe body (211), wherein the method comprises the following steps: (A) lowering a perforation tool (33) into the pipe body (211); (B) forming holes (213) in the pipe body (211) along a longitudinal section (LI); (C) pumping a flushing fluid (36) out through outlets (351) in a flushing tool (35), into the pipe body (211) and further out into an annulus (5); (D) pumping a fluidized plugging material (37) out through the flushing tool (35), into the pipe body (211) and further out into the annulus (5); (E) placing the fluidized plugging material (37) along the longitudinal section (LI) so as to form a plug (25) across the cross section (Tl) of the well, whereby the plug (25) fills the pipe body (211) and the annulus (5); wherein at least one outlet (351) in the flushing tool (35) is angled non-perpendicularly relative to a longitudinal axis of the flushing tool (35), whereby a corresponding discharge jet also will be non-perpendicular to the longitudinal axis.
摘要:
Method and washing tool (24; 24') for combined cleaning of an annulus (10) in a well (2) across a longitudinal section (L 1 ) of the well (2), and subsequent plugging of the longitudinal section (L 1 ), wherein the method comprises the following steps: (A) conducting a perforation tool (18; 18') into a casing (8) to said longitudinal section (L 1 ); (B) forming holes (22) in the casing (8) along the longitudinal section (L 1 ); (C) by means of a washing tool (24; 24') conducted into the casing (8) on a tubular work string (16), pumping a washing fluid (26) through the tubular work string (16) and out into the casing (8) via the washing tool (24; 24'); (D) by means of a directional means associated with the washing tool (24; 24'), conducting the washing fluid (26) out into the annulus (10) via at least one hole (22) at a first location within the longitudinal section (L 1 ), after which the washing fluid (26) will flow via the annulus (10) and onward into the casing (8) via at least one hole (22) formed in at least one second location within the longitudinal section (L 1 ); (E) pumping a fluidized plugging material (50) out into the casing (8) at the longitudinal section (L 1 ); and (F) placing the plugging material (50) in the casing (8) and in the annulus (10) along the longitudinal section (L 1 ) so as to plug the casing (8) and the annulus (10).
摘要:
A method is for establishment of a new well path from a well. The method comprises disposing and anchoring a plug base in a casing in the well; lowering a perforation tool into the casing; forming holes in the casing along a longitudinal section; pumping a flushing fluid out through outlets in a flushing tool and into the casing and further out into an annulus; pumping a fluidized plugging material out through the flushing tool and into the casing and further out into the annulus; placing the fluidized plugging material along the longitudinal section so as to form a plug across a cross section of the well; wherein the outlets in the flushing tool are angled non-perpendicularly relative to a longitudinal axis of the flushing tool. The method also comprises removing a portion of the plug until a cross-sectional section of the plug remains in the annulus; disposing and anchoring a direction-guiding element in the casing within the longitudinal section; by means of the element, guiding a drilling tool against the inside of the casing; and forming an exit hole through the casing and the cross-sectional section of the plug, thereby allowing a new well path to be formed from the well.
摘要:
A method for zone isolation in a subterranean well (1) is described, the well (1) being provided with a pipe body (211) at least in a portion, characterized by the method including: (A) providing a plug (25) over a longitudinal section (L1) of the well (1), the plug (25) covering substantially the entire cross section (T1) of the well (1) at least in a portion of the longitudinal section (L1), so that the plug (1) fills the inside of a pipe body (211) and an annulus (5) between the outside of the pipe body (211) and a surrounding well body (7).