| 摘要 |
A portable drilling rig 20 for drilling water wells or installing geothermal pipe systems in the ground 22. The portable drilling rig 20 is removably mounted on a truck bed 24. The single I beam mast 30 of the rig 20 pivots to a horizontal position 32 on th e truck bed 24 for transport and pivots to a vertical position 34 for drilling, or alternately, pivots to a slanted position 38 for drilling at an angle "A" into the ground 22. A swive l 78 that is normally parallel to the mast 30 is movable along the length of the mast 30. The swivel 78 can be pivoted to its non-parallel position 122 relative to the mast 30 i n order to attach or remove pipe segments 126 from a drive shaft 136 provided on the swivel 78 .
|
