DTH (Down-The-Hole) laum rods tuaj nyob rau hauv ntau hom thiab kev faib tawm ntawm cov xov kom haum rau qhov sib txawv drilling xav tau thiab khoom siv. Nov yog qee hom DTH laum rods thiab kev faib tawm ntawm cov xov:
API Xov: API (American Petroleum Institute) threads yog cov qauv txheej txheem uas nquag siv hauv kev lag luam roj thiab roj. Cov xov no tuaj nyob rau hauv ntau qhov ntau thiab tsawg thiab teeb tsa, xws li API REG (tsis tu ncua) thiab API IF (sab hauv dej ntws).
BECO Xov: BECO threads yog ib hom threaded kev twb kev txuas siv nyob rau hauv DTH drilling khoom. Lawv paub txog lawv lub zog siab thiab kev ntseeg siab, ua rau lawv tsim nyog rau kev xav tau ntawm qhov drilling.
Becosan Xov: Becosan threads yog qhov txawv ntawm BECO threads thiab feem ntau siv hauv DTH drilling daim ntaub ntawv. Lawv muab kev txhim kho kev sib khi thiab tiv taus hnav thiab tsim kua muag piv rau cov qauv BECO threads.
Metzke Xov: Metzke threads yog ib hom threaded kev twb kev txuas siv nyob rau hauv DTH drilling khoom. Lawv paub txog lawv txoj kev ruaj khov thiab feem ntau siv hauv kev tsuas thiab tshawb nrhiav drilling.
Remet Xov: Remet threads yog ib qho kev sib txuas uas feem ntau siv hauv DTH drilling khoom. Lawv paub txog lawv qhov yooj yim ntawm kev sib dhos thiab disassembly, ua rau lawv haum rau kev ua haujlwm ceev thiab ua haujlwm zoo.
Num Xov: Numa threads yog ib hom kev sib txuas uas siv hauv DTH drilling khoom tsim los ntawm Numa. Lawv tau tsim los muab kev ua haujlwm siab thiab ua haujlwm ntev hauv kev nyuaj drilling.
Halco Xov: Halco threads yog ib hom kev sib txuas uas siv hauv DTH drilling khoom tsim los ntawm Halco. Lawv paub txog lawv txoj kev ntseeg siab thiab kev sib raug zoo nrog ntau yam drilling rigs thiab cov cuab yeej.
Sandvik Xov: Sandvik threads yog ib hom kev sib txuas uas siv hauv DTH drilling khoom tsim los ntawm Sandvik. Lawv tau tsim los muab kev ua tau zoo thiab kev ua haujlwm ntev hauv qhov hnyav drilling ib puag ncig.
