Sonde housing and bit body arrangement for horizontal directional drilling

Abstract

A horizontal directional drilling sonde housing has a cavity for receiving a sonde. Signal channels extend from the cavity to an exterior of the housing. A polymer lines at least part of the cavity and fills the signal channels. The drilling tool has a bit body and a drilling body. The two bodies have respective lateral surfaces which engage each other to prevent the transverse movement of the drilling body relative to the bit body during operations. The drill bit has a forward extending drill tooth, which drill tooth is removable from a bore. A spacer is located in the bore between the bottom end of the bore and the tooth. The drilling bit has buttons located on the side in a spiral configuration about a longitudinal axis of the bit.

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         17 . A horizontal directional drilling tool, comprising:
 a) a bit body having front and rear end portions with a mud channel extending between the end portions, the bit body having a longitudinal axis;   b) the bit body has a first mounting surface and a first pin hole that extends from an exterior of the tool to transversely intersect the first pin hole;   c) a drilling body removably mounted onto the bit body, the drilling body having a second mounting surface that contacts the first mounting surface, the drilling body having a second pin hole that aligns with the first pin hole when the drilling body is mounted onto the bit body;   d) a coupling pin inserted into the first and second pin holes, the coupling pin having a hole therein that aligns with the transverse hole;   e) a transverse pin inserted into the transverse pin hole and into the first pin hole;   f) a retainer ring on the transverse pin, the retainer ring is received by a groove in one of the transverse hole or the coupling pin hole.   
     
     
         18 . The horizontal directional drilling tool of  claim 17 , wherein the drilling body is a rock bit. 
     
     
         19 . The horizontal directional drilling tool of  claim 17 , wherein the drilling body is a blade. 
     
     
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