Using an incorrect or outdated load chart is a leading cause of catastrophic mast failure. SLB procedures emphasize that the chart must match the rig’s current configuration, including any modifications to the drawworks or crown block. Operators use these charts to plan a "drilling prognosis," ensuring that the anticipated weights of casing and drill pipe stay well within the rig's hook load capacity throughout the life of the well. Slb Load Chart !!install!!
: The chart typically specifies how many lines (sheaves) must be strung to achieve a certain lifting capacity; more lines increase the mechanical advantage but decrease the speed of the drawworks. 2. Strength Level Blast (SLB) vs. Static Loading slb load chart
Well-designed SLB load charts use simple tables or diagrams showing: Using an incorrect or outdated load chart is
Many SLB load charts are rated for or over the side differently. A common note: "Over the front: 75% of chart values." If you swing a load from the rear to the side without recalculating, you have exceeded the chart. Strength Level Blast (SLB) vs