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1)
LS-1 :- For light to medium loads in shallow wells to medium
depth wells and non-corrosive or inhibited wells.
(API Grade-C)
2) LS-2 :- For medium to heavy load
in medium to deep wells and mild corrosive or inhibited wells.
(API Grade-K)
3) LS-3 :- For heavy loads in
non-corrosive or inhibited wells.
(API Grade-D)
4) LS-4 :- For heavy load at any
depth and in mild corrosive or inhibited wells.
(High Strength)
5) LS-5 :- For extra heavy loads at
any depth in corrosive conditions.\
(Ultra high Strength)
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