| 摘要 |
An apparatus and method for directional drilling utilizing a fluid hammer. The fluid hammer is coupled to a bent steering member which, in turn, is coupled to a drill string. The bent steering member includes means for rotating the fluid hammer independently of the bent steering member. The means for rotating may be a mud motor or a dual drive, pipe-in-pipe mechanism. The fluid hammer may be directed by rotating the drill string and bent steering member to point the fluid hammer in a desired direction. The bent steering member may include a sonde for monitoring its orientation. Fluid pressure capable of activating the fluid hammer is conveyed to the fluid hammer by means of the drill string.
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