Oil Drilling Lift Plugs
OCTL Lift Plugs are manufactured from AISI 4140/ 4145H modified alloy steel, fully heat treated, and feature API precision machined shoulders and threads. For reworking the pin threads, the Lift Plug has one inch of neck below the lifting plate. If specified, OCTL Lift Plugs will be center bored to reduce weight. The connection is phosphatized to prevent galling during initial make-up, and shipped with pressed steel thread protector installed.
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in section "Equipment for oil-field mining mouth"