专利名称：DEEP WELL DRILLING APPARATUS发明人：GOERNER D,US,BRANHAM D,US,BORG P,US申请号：US3796272D申请日：19720217公开号：US3796272A公开日：19740312
摘要：A base structure is provided with a gin pole structure, a mast pivotally mountedin front of and adjacent the gin pole structure, a pipe setback structure mounted in frontof and adjacent the mast on the base structure and independent of the mast, and aseparate vertical structure forming a guide to enable a drawworks to be moved verticallyfrom the base structure upwardly therethrough to a desired height above the basestructure.
申请人：PYRAMID DERRICK & EQUIPMENT CORP,US
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