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Shut Off
Shut-In While Wireline Logging Operation
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;
- Shut the well in while wireline logging through open BOP without a lubricator.
- Shut the well in while wireline logging through open BOP with a lubricator installed in the BOP.
The first case: Shut the well in while wireline logging through open BOP without a lubricator installed.
First step: Stop logging operation.
Second step: Shut the well in by following these procedures;
- 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 of the annular preventor in order to have affective sealing ability if necessary.
- Open a hydraulic valve (HCR) against a fully closed choke manifold valve.
- Use a trip tank to confirm that flow is stopped and the well is totally shut-in.
- 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.
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;
- Energize pack off seals at the lubricator. You may need to increase closing pressure of the pack off seals in order to have affective sealing ability if necessary.
- Open the hydraulic valve (HCR) against the fully closed choke manifold valve.
- Use the trip tank to confirm that flow is totally stopped and the well is properly shut-in.
- Inform drilling supervisors.
About the Author
If you are interested in well control knowledge, please see from this Well Control blog. Rachain J. is working in drilling operations and he would like to share basic knowledge about drilling formulas and drilling operations. For more information about drilling formulas, please read on his blog Drilling Formulas and Calculations
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