Home / News / Company News / Prevent Drill Bits to be Pack-off During Drilling

Prevent Drill Bits to be Pack-off During Drilling

Aug. 12, 26

Pack-off is a serious drilling problem when cuttings clog the borehole. This is typically caused by insufficient borehole cleaning and poor removal of rock cuttings.

Prevent Drill Bits to be Pack-off During Drilling

Common causes of pack-off include:

Insufficient flow rate of mud or air
Insufficient Mud Performance
Excessive rotation speed
No effective activity detected for an extended period
Poor borehole cleaning

Early Warning Signals

Borehole backfill during tripping in or out
Reduced cuttings return flow
Increased torque and drag
Sudden rise in pump pressure

How to prevent Pack-off

Optimize displacement and mud properties
Control mechanical drilling speed under complex operating conditions
Continuously monitor drilling parameters
Conduct periodic drilling operations
Maintain effective borehole cleaning

Pack-off almost never happens instantaneously; as long as you remain consciously alert, you can prevent it in advance.

If you have any questions related to drilling, please feel free to contact us at any time; JCDRILL provides 24/7 after-sales service.

Previous: JCDRILL’s Upgraded CSD200A Drilling Rig Completed and Shipment Bound for West Africa

Next: Experience the Power of Precision-Visit Our Factory & See Drilling Rigs in Action

HOT PRODUCTS

NEWS