Let Me Show You The Problems Often Encountered in The Construction Of Directional Drilling Rigs

Directional drilling rigs mainly stop drilling during construction. It is commonly used in construction. Do you know the problems often encountered in the construction of directional drilling? The following editor will share some materials for you, hoping to help you.

1. Hole body deflection: in case of the deflection of the hole body caused by the use of directional drilling machine, it is generally possible to hang the drill cone at the deflection and stop repeated hole cleaning to make the drilling decent; When the deflection is severe, it is necessary to backfill the cohesive soil to the deflection in time, and then stop the drilling operation after the accumulation is dense.

2. Reaming and shrinkage: in case of reaming and shrinkage, measures should be taken to prevent hole collapse and excessive swing of the drill cone. The former needs to pay attention to stop welding and repairing the drilling cone in time, while the latter needs to use slurry with low water loss rate to protect the wall. The occurrence of shrinkage requires a drill cone to stop repeated hole scanning up and down to expand its aperture.

3. Paste drilling and buried drilling: paste drilling and buried drilling are often presented in reverse drilling and percussive drilling in positive circulation (including submersible drilling rigs). At this moment, it is necessary to stop checking and accounting the consistency of mud, the inlet and outlet of drilling slag, the size of drill pipe inner diameter and slag removal equipment; If the drilling is severely stuck, it is necessary to stop drilling immediately, put forward the drilling cone and eliminate the drilling slag.

4. Sticking: it often occurs when the directional drilling rig is used to stop the impact drilling operation. The forced lifting operation cannot be stopped after the drill is stuck, and it can only be lifted gently.

5. Drilling and falling objects: when drilling and falling objects are dropped, it is appropriate to stop fishing with forks, hooks, rope sleeves and other things. If the falling objects have been buried by sediment, it is necessary to stop cleaning the mud and sand before stopping fishing.

Under any circumstances, directional drilling rig operators cannot enter the borehole without casing or other protective equipment to deal with the problem. When drilling the lower pile casing or other protective equipment, it is necessary to check that there is no harmful gas in the hole and prepare the equipment for gas prevention, drowning prevention and collapse prevention.