| 摘要 |
<p>A tool and method for treating an open hole just before expanding a screen (26) into position is described. The swage (16) is hydraulically driven and permits flow through it and out lateral ports (20) to impact the borehole wall. A cup seal assembly (22) below and a packer (14) up above insure that the fluid impacts the borehole wall with sufficient force to dislodge the mud cake. Another feature of the invention is that the surface treatment and screen expansion can be done in one trip. The pressurized fluid that drives the swage (16) also provides the fluid energy to prepare the borehole wall just before the screen (26) is expanded against it.</p> |
