Kayan Gwaji da Kafafu

Pilot bits da shoes wani kayan narkar da ne mai mahimmanci ana amfani da su a cikin tsarin narkar da double rotary don ayyukan gina shingen gida da injiniyan geotechnical. Waɗannan kayan suna aiki tare don sauƙaƙa ci gaban casing ta hanyar kayan kasa da kankara mara daɗi, wanda ke ba masu aikin damar kafa tsarin shingen gida mai tsauri a cikin yanayin kasa mara daɗi. A cikin fasahar narkar da double rotary, pilot bit ya jagoranci aikin narkar da yayin da casing shoe ya jagoranci da kare pipe na outer casing, lallai don narkar da da kuma shigar casing. Hanya mai haɗin gwiwa ya rage lokacin narkar da kuma ya inganta ayyukan aiki idan aka kwatanta da hanyoyin narkar da single-pass na al'ada.