| 摘要 |
<p>A method and apparatus for forcing an object, such as drainage devices, through the sidewall of a borehole and into the formation to increase oil and gas recovery from the formation. The object usually comprises a plurality of nesting discs perforated to provide a passageway for recovery fluid. The apparatus includes a guide channel that is usually an angled passageway or tube supported in a housing, with the nested discs are stacked therein. By means of a propulsion assembly, the discs are forced non-drillingly, or without rotation, through the guide tube, then through the side wall and out into the formation. The propulsion assembly may take several forms, such as percussive mechanism or stage explosions. The apparatus and method also may be used with interconnected links instead of discs to push a core sampler into the formation and then retrieve it. Alternatively, the apparatus takes the form of a pre-loaded casing section, that is, a casing section in which a plurality of drainage devices have been incorporated in the sidewall so that a bit pushed through the casing forces the drainage devices out into the formation.</p> |
