| 摘要 |
<p>The invention relates to an installation for producing perforations in a hydrocarbon carrier bed, penetrated by a hole drilled preferably for the recovery of shale gas. According to the invention, the installation comprises a gun (A) which consists of a tubular housing (1) preferably provided with four lateral openings (a), having their centres placed in a same transverse plane and equally spaced apart from one another, some centralizers (2) are fixed to the housing (1) at its extremities, some outwardly extendable telescopic subassemblies (B) being mounted in the openings (a), each of these subassemblies consisting of some lower, intermediate and upper cylinders (4, 5 and 6), respectively, located inside one another, the lower cylinder (4) having the largest inside diameter, to the upper cylinder (6) there being fixed an upper lid (7) provided with some calibrated orifices (c), into the upper cylinder (6), in front of the central orifice (c), there being placed a heat source (8) which emits a laser beam, the lower cylinder (4) being closed by a lower lid (9), to which, in front of another central orifice (e) cut therein, there is fixed a short pipe (10) connected to the pipe (11) for supplying with a pressurized fluid, connected to a coupling bush (12), the heat source (8) being connected by means of a secondary optical cable (25) and by means of a high power electro-optical switch (24) placed in the bush (12), with a main optical cable (19) placed, in its turn, in connection with the high power pulse laser (21) as a source of light beams.</p> |
