| 摘要 |
A drilling apparatus for drilling a lateral bore to main bore (1), comprises a casing (4) in the main bore, having at least one window (35), at least one lateral tube (6), including a bit (15) or other soil penetrator, the lateral tube which engages with an aperture in the casing, the outer diameter of lateral tube flush with aperture, such that the lateral tube is forced through the casing aperture into the formation when a sufficient pressure differential between the inside of the casing and the outside of the casing and a plurality of packers (5) disposed at intervals along the outside of the casing, capable of sealing the annulus to the passage of fluids. |
