RU2001125924A - SELECTIVE ZONAL INSULATION INSIDE THE ANTITUDINAL COLUMN-TAIL WITH ANALYZES - Google Patents

Claims (9)

1. A method of selective isolation provided within the borehole area, internally cured by a liner having slit-like openings and capable of expanding, this method comprising the following steps: full expansion of said liner-casing having slit-like openings and capable of expanding, inside the wellbore, before it enters into contact with substantially its entire surface with the walls of the wellbore adjacent to said liner casing; the placement of at least one additional liner casing, capable of expanding and essentially not having perforated holes in it, within the area of the originally installed, expandable liner casing to be insulated; and expanding said at least one additional liner casing capable of expanding until it enters while providing sealing in contact with an originally installed liner capable of expanding having slit openings at least near the ends the specified zone to be isolated, so that the desired zone of the wellbore is isolated from the rock formation. 2. The method according to claim 1, characterized in that the said seal is carried out on an ongoing basis. 3. The method according to claim 1 or 2, characterized in that the said at least one additional liner-casing, capable of expanding, is introduced into the well in a compressed state, and then released when it is located there in place, or it is introduced there in a longitudinally bent state, and then expanded when it is located there in place. 4. The method according to any one of claims 1 to 3, characterized in that the said at least one additional liner-casing, capable of expanding, is made of a material having the ability to remember its original shape, and first such casing the liner is given the required initial shape, after which it is accordingly deformed in order to ensure the possibility of introducing it into the wellbore before launching, and then the ability of this material to remember the initial howling, as a result of which the extension of this liner casing to its original initial shape and selective isolation with compaction of the desired zone of the wellbore occur. 5. The method according to any one of claims 1 to 4, characterized in that the said at least one casing liner capable of expanding is made of metal or plastic. 6. The method according to any one of claims 1 to 5, characterized in that the said at least one liner casing, capable of expanding, differs in its physical characteristics from the shaft liner previously installed in the well, due to which it is possible to appropriately take into account various characteristics of the flow flowing along the wellbore, for example, such as pressure and erosion. 7. The method according to any one of claims 1 to 6, characterized in that the said expansion is carried out using a mandrel, an explosion force, or under pressure of some fluid. 8. The method according to any one of claims 1 to 7, characterized in that it further comprises the following stage: the use of sealing materials in order to ensure better insulation between said casing string and said at least one casing string during insulation shank capable of expanding. 9. A system of selective zonal isolation, which can be used to provide selective isolation, either on a permanent or temporary basis, of individual intervals of the wellbore when equipping finished wells using casing shanks with slit-like openings for such practical purposes as termination the issuance of a particular fluid, or the provision of an exciting effect on the reservoir to increase oil recovery, and this system provides for the expansion of the existing casing an onna-shank having slit-like openings and capable of expanding essentially to such a size that corresponds to the inner diameter of the wellbore; the implementation of the descent of at least one liner casing, capable of expanding and not having perforated holes in it, into the zone to be insulated; and expanding said at least one liner casing so as to insert it while providing a seal to said liner casing having slit-like openings at least near the ends of said zone to be insulated.