Drilling apparatus that includes a skid mounting a mast assembly, an engine, and control assembly, the mast assembly including a derrick section, a drill head and drill head motor mounted on the derrick section for reciprocal movement relative thereto, and support members pivotally mounted on the skid for selectively supportingly retaining the derrick section in a vertical drilling position, an inclined angle hole drilling position and a horizontal transport position. One of the support members is attached to the derrick section for selectable slidable movement relative thereto and is connectable to the drill head carriage to facilitate moving the derrick section between different angular positions relative the horizontal.
A truck provided with drill units to drill the end wall of a tunnel under excavation, this truck being characterized by having a support for the drill units, which is pivoted about a transverse axis relative to the vehicle body to provide adjustment of the inclination of the support in relation to the inclination of the end wall to be drilled, to allow adjustment of the overall height of the truck for tunnels of different heights, and to provide a better load distribution to allow faster travel. This support is pivotally connected to provide automatic and constant aiming of the drill units in parallel rearwardly pointing relationship.
A drill mast support assembly having a drill mast pivotable between a drilling and a non-drilling position and including elongated rigid brace means for stabilizing the mast in the drilling position. The brace means are connected to the mast by support means which provide for a compact assembly when the mast in the non-drilling position and permit the brace means to be automatically positioned as the drill mast is moved to the drilling position. Lock means are further provided for preventing relative movement between the mast and the brace means when the mast is in the drilling position.
The invention relates to a mobile drilling rig providing a rotation head which is small enough to fit between the mast members of the rig. Arrangements are made to pivot back the rotation head to give access to the drill line of the rig. The mast members can be pivotted on a frame to place them into the drilling and travelling position respectively.
Two pivots are provided on a drill tower support. The drill tower is supported on and positively locked to the upper pivot in the horizontal position. The drill tower can be pivoted about the first pivot from the horizontal position to the vertical position and positively locked to the lower pivot. The drill tower is then disconnected from the first pivot and thereafter it can be pivoted about the second pivot for angle drilling.
4465144 - Drill rig mast structure - Owned by Warman International Limited (Artarmon,AU) [*] Notice:The portion of the term of this patent subsequent to July 19, 2000 has been disclaimed.
The invention relates to a mobile drilling rig providing a rotation head which is small enough to fit between the mast members of the rig. Arrangements are made to pivot back the rotation head to give access to the drill line of the rig. The mast members can be pivotted on a frame to place them into the drilling and travelling position respectively.
