barriers are within the drill room which is subterranean referring to fig1 the description of elements common to both fig1 and 12 and previously described with reference to fig1 is incorporated herein unlike the embodiment of fig1 secondary injector 111 is present in addition to primary injector 100 in the laity embodiment of fig1 also service window 98 is present service window 98 is a device for the containment and support of the primary injector 100 the purpose of the service window 98 is to isolate the primary injector device 100 from the return drill fluid stream and to pack off fluid pressure and drain fluids from the primary injector device 100 this allows access and servicing of the primary injector 100 in atmospheric condition without withdrawal of the drill string 34 cessation of drilling operations is required during servicing during drilling operations the service window 98 isolates the primary injector 100 from the drill fluid return stream by diverting the drill stream return through a valved flow cross 102 solids are retained or reintroduced to suspension prior to entry in the by pass by use of a venturi that increases fluid velocity referring to fig1 a and 13 b gooseneck 121 supports drill string 34 between coiled tubing unit 110 and primary injector 100 coiled tubing raceway 108 allows the remote introduction of coiled drill string 34 to a subterranean well head from a surface mounted coiled tubing unit 110 the raceway 108 provides directional stability for the coiled drill string 34 as snubbing compressive force is introduced to the drill string 34 to force the drill string 34 through the subterranean thrust block 36 and to provide drill bit.