Ingegneria meccanica: Industria petrolifera
| English |
| drill pipe |
  |
|
| Part of speech |
Noun phrase
|
| Grammatical label |
Countable
|
| Full form |
rotary drillpipe
|
| Definition |
A special upset-end pipe with thread and shoulder end connections, carefully designed to withstand the tensile, torsional and, burst of the rotary drilling. It connects the drill collars to the earth´s surface and transmits rotational power and drilling fluid to the bit at the bottom of the hole.
|
| Definition source |
Sh91
|
| Context |
As the drillpipe is used it gets worn by dragging against the formation. The box tool joints lose thickness and so do the pipe bodies. Decreased wall cross-sections automatically entail a loss of mechanical resistance. This is why API has classified used pipe into:
Class I new pipe, all dimensions match nominal values,
Premium 80% of the thickness remaining,
Class II 70% of the thickness remaining.
|
| Context source |
Sh91
|
| Subject field |
Petroleum Engineering
|
| Comprehensive concept |
drill stem
|
| Partitive concept |
tool joint
|
| it |
asta di perforazione
|
| Reliability code |
3
|
|
