Swabbing Operations
This process must be done carefully, as it involves working with pressurized systems and heavy equipment. Improper handling or equipment failure can lead to serious hazards for workers on site.
Potential Hazards
- Loss of well control: Swabbing can reduce pressure in the wellbore, which may cause an unexpected release of fluids or gas if not properly managed.
- Fire, explosion, or respiratory hazard: Oil or gas leaking or venting from tanks, lines, or the lubricator can create a serious fire or breathing risk, especially in poorly ventilated areas.
- Struck-by hazard from pressurized line: If a hose or line under pressure fails or disconnects, it can whip around and strike workers nearby.
- High-pressure connection failure: Mismatched or excessively worn hammer unions can fail under pressure, causing sudden releases of energy and equipment parts.
- Struck by lubricator or pressurized fluids: When the lubricator is removed from the well, trapped pressure can release suddenly, pushing the lubricator or fluids toward workers.
- Strains and sprains: The lubricator and associated tools are heavy and awkward to handle, which can lead to musculoskeletal injuries if proper lifting techniques are not used.
- Pinch points: Fingers and hands can get pinched between the swab assembly and lubricator when changing out swab cups or mandrels.
We will take a closer look at the possible solutions involving hazards in swabbing operations in the next section.
Knowledge Check Choose the best answer for the question.
6-6. While swabbing, what is the hazard from mismatched or excessively worn hammer unions?
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