دريک ،دکل کشتى ،برج چاه کنى ،با جرثقيل حمل کردن علوم نظامى : مته زمين کنى علوم دريايى : دريککلمات مرتبط(3)
جرثقیل، دکل کشتی، برج چاه کنی، با جرثقیل حمل کردن .
derrick
Từ điển WordNet
n.
a framework erected over an oil well to allow drill tubes to be raised and lowered
a simple crane having lifting tackle slung from a boom
Oil and Gas Field Glossary
Steel structure mounted over the bore hole to support the drill pipe and other equipment which is lowered and raised during drilling operations. This semi-permanent structure of square or rectangular cross-section having members that are latticed or trussed on all four sides must be assembled in the vertical or operation position as it includes no erection mechanism, this derrick may or may not be guyed.
