This is a short section of casing or tubing used as a depth identifier to a collar locator log or used at the top of the well when spacing out a string prior to hanging the string.

This is a short section of casing or tubing used as a depth identifier to a collar locator log or used at the top of the well when spacing out a string prior to hanging the string.

• A. Pup joint
• B. Drill collar
• C. Joint of tubing
• D. Wellhead spool

Answer: (A)

Pup joints are short sections of casing or tubing kept in the string to provide precise depth references and spacing. They act as a depth identifier for collar locator logs and can be placed at the top of the well to fine-tune the length before hanging the string. The idea is to have small, standard increments of length that help locate collar depths downhole and ensure the string is spaced correctly. A drill collar is a heavy downhole weight tool, a joint of tubing is a full-length segment, and a wellhead spool is surface equipment, none of which serve as a depth marker or spacing piece.

Pup joints are short sections of casing or tubing kept in the string to provide precise depth references and spacing. They act as a depth identifier for collar locator logs and can be placed at the top of the well to fine-tune the length before hanging the string. The idea is to have small, standard increments of length that help locate collar depths downhole and ensure the string is spaced correctly. A drill collar is a heavy downhole weight tool, a joint of tubing is a full-length segment, and a wellhead spool is surface equipment, none of which serve as a depth marker or spacing piece.