Shut-in procedures while wireline logging operation are very critical for all drillling crew working on the rig. Learn about two vital cases of the shut-in procedures.
Two cases of shut the well in while logging with wire line are as follows;
1. Shut the well in while wireline logging through open BOP without a lubricator.
2. Shut the well in while wireline logging through open BOP with a lubricator installed in the BOP.
Let’s talk about the first case: Shut the well in while wireline logging through open BOP without a lubricator.
First step: Stop logging operation
Second step: Shut the well in by following these procedures;
1. Close annular preventor because we would like to use the annular preventor element to squeeze around the wireline. You may need to increase closing pressure in order to have affective sealing ability if necessary.
2. Open a HCR valve against a fully closed choke manifold valve.
3. Use a trip tank to confirm that flow is stopped and the well is totally shut-in.
4. Inform drilling supervisors
The well sometimes cannot be totally shut in via a closed annular preventor therefore you must consider cutting the wireline and letting it drop then using blind rams to shut the well in instead. If the annular preventor could not seal around the wireline effectively and the wireline cannot be cut and dropped through the Blow Out Preventor (BOP), you may consider using shear rams to cut the wire as the last option.
Let’s talk about the second case: Shut the well in while wireline logging through open BOP with a lubricator installed in the BOP.
First step: Stop logging operation
Second step: Shut the well in by following these procedures;
1. Energize pack off seals at the lubricator. You may need to increase closing pressure in order to have affective sealing ability if necessary.
2. Open a HCR valve against a fully closed choke manifold valve.
3. Use a trip tank to confirm that flow is totally stopped and the well is properly shut-in.
4. Inform drilling supervisors
Reference book: Well Control Books
