BSR (Bending Strength Ratio): On bottomhole assembly connections, the ratio of the box section modulus to the pin section modulus. BSR applies only to connections on drill collars and other stiff-bodied components that are run in the BHA. It does not apply to HWDP connections, except the one immediately above the drill collars, or to the connections of any components that are not normally run in the BHA.
BSR Z Z D D b R B R d 44 44 = = ' - - P b b l l .........................(A.8) Where: BSR = Bending Strength Ratio ZB = Box Section Modulus (in3 ) ZP = Pin Section Modulus (in3 ) D = Outside Diameter of Box (in) d = Inside Diameter of pin (in) b = Thread root diameter of box threads at end of pin (in) R = Thread root diameter of pin threads (in
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Mellado
Please explain BSR
BSR (Bending Strength Ratio): On bottomhole assembly connections, the ratio of the box section modulus to the pin section
modulus. BSR applies only to connections on drill collars and
other stiff-bodied components that are run in the BHA. It does
not apply to HWDP connections, except the one immediately
above the drill collars, or to the connections of any components
that are not normally run in the BHA.
How to calculate bsr on connection?
BSR Z
Z
D
D b
R B R d 44 44
= = ' - -
P
b b l l .........................(A.8)
Where:
BSR = Bending Strength Ratio
ZB = Box Section Modulus (in3
)
ZP = Pin Section Modulus (in3
)
D = Outside Diameter of Box (in)
d = Inside Diameter of pin (in)
b = Thread root diameter of box threads at
end of pin (in)
R = Thread root diameter of pin threads (in
Give your whatsaap no I will give the soft copy of BSR calculations
Bore ban