HJ tungsten carbide insert bits used for oil and gas drilling
IADC | Recommended Parameter | Formation | |
WOB KN/mm (bit dia.) | RPM(r/min) | ||
114\115 | 0.3~0.75 | 180~50 | Very soft with low compressive strength and high drillability,such as clay,mudstone,chalk,etc. |
116\117 | 0.3~0.8 | 150~70 | Very soft with low compressive strength and high drillability,such as clay,mudstone,chalk,etc. |
124\125 | 0.3~0.85 | 180~60 | Soft with low compressive strength and high drillability,such as clay,mudstone,salt,loose stands,soft limestone,etc. |
126\127 | 0.3~0.9 | 150~60 | Soft with low compressive strength and high drillability,such as clay,mudstone,salt,loose stands,soft limestone,etc. |
134\135 | 0.35~0.95 | 150~50 | Soft to medium with low compressive strength or soft with harder streaks,such as shale,mudstone,soft limestone,sands,etc. |
136\137 | 0.35~1.0 | 120~60 | Soft to medium with low compressive strength or soft with harder streaks,such as shale,mudstone,soft limestone,sands,etc. |
214\215 | 0.4~0.95 | 150~60 | Medium hard with hard streaks and high compressive strength,such as medium soft shale,anhydrite,medium soft limestone,medium soft sandstone as well as thick and hard streaks,etc. |
216\217 | 0.4~1.0 | 100~60 | Medium hard with hard streaks and low compressive strength,such as medium soft shale,limestone and sandstone as well as thick and hard streaks,etc. |
244 | 0.35~0.95 | 150~40 | Medium hard with hard streaks and high compressive strength such as hard shale,sands,limestone,etc. |
246\247 | 0.4~1.0 | 80~50 | Medium hard with hard streaks and high compressive strength such as hard shale,sands,limestone,etc. |
324\325 | 0.4~1.0 | 120~50 | Hard with high strength and abrasiveness such as hard limestone,hard sands,dolomite,hard shale,etc. |
