Research and Application of the Casing Stuck Releasing Device in Loose Strata

Abstract:

Casing is commonly used for wall protection in quaternary loose strata drilling and pulled out after completing construction. But it is easily to be stuck by attachments from the outside, pulling out is difficult. A casing stuck releasing device was developed to loose the outside wedged attachments for casing unfreezing and pulling out. This device has been used in boreholes with desired effect.