Equipment for lifting and lowering operations

Abstract

The equipment of the lifting complex works in the mode of repeated short-term variable loads. The process of raising a column from a well, composed of separate sections (candles), consists of cyclones "n", which contain repeated operations in a strictly defined sequence: capture of the column by an elevator; lifting of the entire column to the length of the candle under the load on the hook, which is equal to the weight of the column wife in the solution and the resistance forces during its movement in the well; installation of the column on the rotor table; relief from the load that stretches the candle raised to the surface; loosening with keys, loosening the candle from the column with a raised candle and installing it inside the drilling rig in a special store or placing it on bridges near the drilling rig; descent of an unloaded hook and elevator for capturing a column suspended on a rotor; capturing and raising the column to the length of the next candle, etc. When descending the column, these operations are performed in the reverse sequence, but with different durations and loads.