| 摘要 |
<p>A method and system of drilling straight directional and multilateral wells (201) utilizing hydraulic frictional controlled drilling, by providing concentric casing strings (254, 258, 264, 270) to define a plurality of annuli (252, 257, 260, 268) therebetween; injecting fluid (256) down some of the annuli; returning the fluid (256) up at least one annulus (257) so that the return flow creates adequate hydraulic friction within the return annulus (257) to control the return fluid flow (256) within the well. The hydraulic friction should be minimized on the injection side to require less hydraulic horsepower and be maximized on the return side to create the desired subsurface friction to control the well.</p> |
