If a radioactive logging tool sticks in the hole, the following guidelines must be adhered to:

Do not continue work the tool because this may result in accidentally breaking the weak link.
The Drilling Supervisor shall provide the Operations Engineer and provide him with all relevant information regarding the position of fish, allowable tension of weak point and cable, etc. The Operations Engineer must inform Head of Operations who shall approve the Fishing Programme which is to be written by the Operations Engineer. The Drilling Supervisor shall ensure that the Logging Engineer informs his management.
Hold a pre-job safety meeting and emphasise to all personnel the requirement to keep clear of the rig floor during recovery.
Proceed with strip over operations.
Circulate bottoms up and have the logging contractor monitor the mud returns with a Gamma Ray tool placed in the return line. Ensure no personnel other than Logging Contractor's to be near mud pits or returns lines.
Ensure that with the tool engaged in the overshot, circulation remains possible using the circulating sub if necessary.
Unless authorised otherwise by the Head of Operations reverse stripping shall be carried out as a precaution against dropping the tool.

Recovery of Radioactive Sources

Until a radioactive source has been fished out of the hole and is back in its carrying shield, try to keep the maximum distance between the source and personnel.
Keep the number of personnel on the rig floor to an absolute minimum.
The Driller should pull the tool containing the source as far as possible above the rig floor (minimum 50 ft).
The rig crew should then cover the hole and leave the rig floor.
The Driller should leave the rig floor until the Logging Engineer indicates that they are ready to disengage the fish and put the source into the shield.
The shield should be placed near the spot where the source is to be released from the tool. Care should be taken to handle the source housing at points of minimum radiation, using the source handling tools.
If the source cannot be removed from the tool, a wrap around shield should be attached to the tool and then taken to the logging base

Abandonment of a Source in the Hole

Only the Head of Operations can authorise the abandonment of a tool down hole. If the hole is straight, a 1 000 ft cement plug shall be set on top of the tool prior to any other activity taking place. When well is handed over all details of radioactive source abandoned in hole has to be recorded in the handover sheet and metal plate marker installed on wellhead/Xmas tree.
Ensure governmental legislation is followed