| 摘要 |
A method for erecting a drilling rig and an apparatus therefor having a mast (14), a base (20, 22), a floor support (24, 26), legs (28, 30, 32, 34) arranged between the base (20, 22) and the floor support (24, 26), a primary lifting ram (100, 110) in engagement with the mast (14), and a floor support lifting ram (120), is disclosed. The method involves raising the mast (14) with the primary lifting ram (100, 110), raising the floor support (24, 26) with the floor support (24, 26) lifting ram to an intermediate height, engaging the primary lifting ram with the floor support and raising the floor support from the intermediate height to full working height with the mast lifting ram (100, 110). |
