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nipple

1. n. [Drilling, Production]

Any short piece of pipe, especially if threaded at both ends with male threads.

2. n. [Well Completions]

A completion component fabricated as a short section of heavy wall tubular with a machined internal surface that provides a seal area and a locking profile. Landing nipples are included in most completions at predetermined intervals to enable the installation of flow-control devices, such as plugs and chokes. Three basic types of landing nipple are commonly used: no-go nipples, selective-landing nipples and ported or safety-valve nipples.

See: no-go landing nippleselective nipple

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