How are Bumper Sub and Fishing Jar Activated? What Exactly Happens Inside?
Bumper subs and fishing jars are activation services that help release stuck pipe in oil and gas wells. Bumper subs are used to provide an impact force to the stuck pipe, while fishing jars use a jarring action to create a sudden release of force.
Bumper Sub Activation:
- The bumper sub is installed below the drill string or other downhole tool.
- The tool is lowered into the well and positioned just above the stuck pipe.
- A hammer or other impact tool strikes the bumper sub, generating a shockwave that travels down the tool and into the stuck pipe.
- The shockwave creates a shockload on the stuck pipe, breaking it free.
Fishing Jar Activation:
- The fishing jar is installed below the drill string.
- The tool is lowered into the well and positioned just above the stuck pipe.
- The tool is connected to a wireline or other downhole tool that can apply an upward force.
- The fishing jar is activated by pulling up on the wireline, creating a jarring action that releases the pipe.
Related Questions and Answers:
- What is the main difference between a bumper sub and a fishing jar? Both provide impact force, but bumper subs use a direct impact, while fishing jars use a jarring action.
- When should a bumper sub be used instead of a fishing jar? When the stuck pipe is at a shallow depth or is not severely stuck.
- What can affect the effectiveness of bumper subs and fishing jars? The type of stuck pipe, depth, and well conditions.
- What safety precautions should be taken when using bumper subs and fishing jars? Ensure proper handling, wear protective gear, and follow industry best practices.
- Can bumper subs and fishing jars be used in other applications? Yes, they can be used in some mining and construction applications.
Hot Sale Products:
- Halliburton Fishing Jar
- Schlumberger Bumper Sub
- Baker Hughes Drill Pipe Jar
- NOV Downhole Bumper Sub
- Weatherford Fishing Tool
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