Drill pipe with replaceable tool joints

Abstract

A drill string including tool assembly. The tool assembly includes a tool joint adapter and a tool joint coupled to the tool joint adapter through a faceted pin. The faceted pin includes a faceted fitting having a fitting face. The drill string includes a locking pin that extends through the tool joint adapter and tool joint. The locking pin extends through a locking pin groove of the fitting face. The locking pin locks the tool joint adapter and tool joint together.

1 . A drill pipe assembly, comprising:
 a drill pipe body;   first and second tool joint adapters coupled to the drill pipe body;   a replaceable pin tool joint coupled to the first tool joint adapter; and   a replaceable box tool joint coupled to the second tool joint adapter;   wherein the first and second tool joint adapters are welded to the drill pipe body, and   wherein the replaceable pin end tool joint and the replaceable box end tool joint are detachably coupled to the drill pipe body.   
     
     
         2 . A tool assembly, comprising:
 a tool joint adapter;   a tool joint coupled to the tool joint adapter through a faceted pin, wherein the faceted pin includes a faceted fitting having a fitting face;   a dowel pin which extends through the tool joint adapter and tool joint, wherein the dowel pin extends through a dowel pin groove of the fitting face.   
     
     
         3 . The assembly of  claim 2 , wherein the tool joint and tool joint adapter are coupled together through a faceted socket engaged with the faceted pin. 
     
     
         4 . The assembly of  claim 2 , wherein the dowel pin extends through a dowel pin channel which faces the dowel pin groove. 
     
     
         5 . The assembly of  claim 2 , wherein the faceted pin includes a sealing pin which forms a seal between the tool joint and tool joint adapter. 
     
     
         6 . The assembly of  claim 2 , wherein a locking sleeve body and a second drill rod tool joint include inner and outer race regions, respectively, which face each other. 
     
     
         7 . The assembly of  claim 2 , further including a fastener which fastens the dowel pin in the dowel pin groove. 
     
     
         8 . The assembly of  claim 2 , wherein the faceted pin includes a plurality of fitting faces. 
     
     
         9 . The assembly of  claim 2 , wherein the faceted pin includes a curved fitting face. 
     
     
         10 . The assembly of  claim 2 , wherein the faceted pin is included with the tool joint adapter. 
     
     
         11 . The assembly of  claim 2 , wherein the faceted pin is included with the tool joint. 
     
     
         12 . The assembly of  claim 2 , wherein the tool joint is a pin tool joint. 
     
     
         13 . The assembly of  claim 12 , wherein the pin tool joint includes a threaded pin. 
     
     
         14 . The assembly of  claim 13 , wherein the faceted pin is included with the pin tool joint. 
     
     
         15 . The assembly of  claim 2 , wherein the tool joint is a box tool joint. 
     
     
         16 . The assembly of  claim 15 , wherein the box tool joint includes a threaded box. 
     
     
         17 . The assembly of  claim 15 , wherein the faceted pin is included with the box tool joint. 
     
     
         18 . The assembly of  claim 2 , wherein a locking sleeve body and a second drill pipe tool joint include inner and outer race regions, respectively, which face each other. 
     
     
         19 . The assembly of  claim 2 , further comprising:
 a fastener which fastens a locking pin in a locking pin groove.   
     
     
         20 . (canceled) 
     
     
         21 . (canceled) 
     
     
         22 . (canceled) 
     
     
         23 . The assembly of  claim 2 , wherein the faceted pin is included with the tool joint. 
     
     
         24 . The assembly of  claim 2 , wherein the tool joint is a pin tool joint. 
     
     
         25 . The assembly of  claim 24 , wherein the pin tool joint includes a threaded pin. 
     
     
         26 . The assembly of  claim 24 , wherein the faceted pin is included with the pin tool joint. 
     
     
         27 . The assembly of  claim 2 , wherein the tool joint is a box tool joint. 
     
     
         28 . The assembly of  claim 27 , wherein the box tool joint includes a threaded box. 
     
     
         29 . The assembly of  claim 27 , wherein the faceted pin is included with the box tool joint.