The specification problem pup joints solve
Pup joints are the short lengths that make up the difference between the standard-joint total and the design depth. The catalogue’s twelve pup joint entries are shared between the tubing pup joint and casing pup joint titles.
The catalogue publishes no standard length steps for pup joints: its twelve entries are organised by family — pup joint, tubing pup joint, casing pup joint — not by length. State the lengths your space-out calculation calls for in the enquiry, with the target adjustment range it states, and ask for the lengths to be confirmed against that range in the quotation. What matters for the buyer is the set logic: state the graded set of lengths your own tally arithmetic calls for, as a set, rather than a single joint cut to a guessed figure.
Measured length: name the convention your tally uses
| Convention | State it in the enquiry as |
|---|---|
| Overall length | The end-to-end figure your tally states — and whether it includes the coupling |
| Pin-to-shoulder | The figure on that basis, where your tally uses it |
| Effective length | The usable figure inside your tally, on the measurement basis you state |
| Set order | The string sequence your tally states for packing and marking |
The defence is boring: state the convention in the enquiry and ask for it to be restated in the quotation for the order. If your tally needs each joint marked with its measured length, state that marking in the enquiry so the quotation can confirm whether it can be accepted and in what scope; and if your tally works in a different convention, name that convention in the enquiry so the confirmed marking is stated in it.
The complete pup joint specification
State the pup joint's specification on its own line: outside diameter, weight or wall, grade, thread form and coupling configuration as your design names them for the joint — including construction, coupled or integral, where the design names one. Add the length set and the measured-length convention, and ask for the lengths in the set to be confirmed against the convention you state. Perforated patterns are the one addition that changes the product's nature: a drilled pup joint is an enquiry item confirmed against a drawing, and never specified by length alone. Ask for MOQ, packing and lead time to be confirmed in the written quotation; if a set must be packed and marked as a set, state it in the enquiry, and the quotation will confirm whether it can be accepted and in what scope.
What lengths can be ordered?
The catalogue publishes no standard length table for pup joints — its entries are organised by family. State the lengths or the graded set your space-out calculation calls for in the enquiry, and ask which of them can be supplied, to be confirmed in the quotation.
Should lengths include the coupling?
Whichever convention your tally uses — but it must be stated. Overall length including coupling is the first convention in the table above; state the convention your tally uses in the enquiry, and ask for the lengths to be confirmed on that basis in the quotation.
How many pup joints should a set contain?
The graded set of lengths your own tally arithmetic calls for, stated as a set in the enquiry. Send the target depth and tolerance with the enquiry, and ask which of the requested lengths can be supplied, to be confirmed in the quotation.
Request a Quotation
Send your size, grade, thread and quantity. MOQ, packing and lead time are confirmed in the quotation for your exact specification — no generic promise replaces a written quote.