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SYSTEM AND METHOD FOR HORIZONTAL DIRECTIONAL DRILLING AND PRODUCT PULLING THROUGH A PILOT BORE
SYSTEM AND METHOD FOR HORIZONTAL DIRECTIONAL DRILLING AND PRODUCT PULLING THROUGH A PILOT BORE
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机译:通过先导孔进行水平方向钻探和产品牵引的系统和方法
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摘要
Disclosed is a system and method employed in a horizontal directional drilling (“HDD”) process. An exemplary embodiment includes a drill bit with thirteen (13) or more splines for improved orientation of the drill bit relative to the orientation of a bent sub. Another exemplary embodiment includes a drill bit configured for receipt of a pulling device so that the drill bit may be used in a back reaming step to pull a product back through a pilot bore. Another exemplary embodiment includes a pulling device for mounting to a drill bit. The pulling device, in some embodiments, may include one or more pins for diverting and channeling air and/or fluid through the drill bit to lubricate a hammer assembly and/or the product being pulled as the drill string to which the drill bit is attached is retracted back through the pilot bore.
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