Blockline and crown loads- Work
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Blockline Loadings, release 5, issued 24 April 2008. WORK version.
The current release of this worksheet exists in different versions. They are identical apart from the way they are formatted. The Work version hides intermediate calculations and allows the user to see the results just below the inputs. This is useful for quick “what-if” games, changing various inputs to see what works best. The Audit version displays all intermediate calculations. The PDA version removes all text and formats the input and output fields for optimum viewing on a mobile, small-screen device.
1″ 6×19 IPS IWRC1″ 6×19 EIPS IWRC1.125″ 6×19 IPS IWRC1.125″ 6×19 EIPS IWRC1.25″ 6×19 IPS IWRC1.25″ 6×19 EIPS IWRC1.375″ 6×19 IPS IWRC1.375″ 6×19 EIPS IWRC1.5″ 6×19 IPS IWRC1.5″ 6×19 EIPS IWRC1.625″ 6×19 IPS IWRC1.625″ 6×19 EIPS IWRC1.75″ 6×19 IPS IWRC1.75″ 6×19 EIPS IWRC1.875″ 6×19 IPS IWRC1.875″ 6×19 EIPS IWRC2″ 6×19 IPS IWRC2″ 6×19 EIPS IWRC
Either; select a blockline
OR, enter wire breaking strength
Number of lines strung. Nbl =
Safety factor required for the blockline. SFbl =
Select a block bearing type to determine API friction factor
What is the maximum crown load (eg derrick limit)? Fcllimit =
Travelling block weight. mtb =
Desired load carried under the travelling block. Fhlbb =
Click here when any values are modified to update the result.
1 – limits of the line and derrick; the limiting
Wire rope strength
Maximum hook load (including travelling block)
Maximum useable hook load (accounting for block)
2 – loads arising from the desired load under the travelling block, or
Fast line load
Dead line load
Safety factor on the fast line
Specified hook load as % of maximum
Institut Francais du Petrole. “Drilling Data Handbook” 6th Edition.
Release 1 of this worksheet was issued on 18 April 2008.