Heavy drilling tools and refinery equipment
Downhole tools
A shock tool in the bottom-hole assembly absorbs axial vibration so less of it reaches the rest of the string.
Drilling vibrates the bit and the tools above it. A shock tool, sometimes called a shock sub, is a telescoping member that damps that axial movement. It is there to spare the bit, the motor and the connections from part of that load. It is not a drilling jar. A jar is run to deliver a blow when the string is stuck. If the enquiry is for a jar, say jar, and name hydraulic or mechanical, the outside diameter and the placement the drilling programme expects.
The order for a shock tool names the outside diameter, the connections and the hole section it will run in.
| Duty | Absorb axial shock in the bottom-hole assembly |
|---|---|
| Not this product | A drilling jar, which is quoted as a jar |
| Named on the order | Outside diameter, connections, hole section |
| Where it runs | Above the bit, as the programme specifies |
| Evidence | Datasheet when the maker supplies it |
A datasheet will be attached when measured results are on file.
Request a quoteWhat it is used for
The tool shortens and lengthens enough to take part of the axial shock out of the bottom-hole assembly. It is not a jar. If the string is stuck and you need a blow, ask for a jar and say whether it is hydraulic or mechanical.
The order
We quote the piece you name. A missing size or standard is a question, not a guess.
Body size for the assembly.
Both ends.
The hole it will run in.
Supply
The specification written on the order.
Mill or material certificates when the maker provides them.
Identity marks checked against the packing list.
A performance figure is published only when a datasheet is attached.
Use the quote button. Include the duty, the quantity and where it has to be delivered. We reply on business days.
Write to info@edatm.com or telephone +44 7570 624325. Replies go out on business days, Monday to Friday, 08:30–18:00.
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