STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

590 Drilling and Well Completions
Table 4-31
Minimum Groove Radii for Worn Sheaves [ll]
Wire Rope
Nominal Size
Radii
in. (mm) in. (mm)
% (6.5) .129 ( 3.28)
t% I 8) .160 ( 4.06)
K (9.5) .190 ( 4.88)
T? (11) .220 ( 5.59)
% (131 256 ( 6.50)
rh 114.51 .a8 ( 7.82)
% (16) ,320 ( 8.13)
% (19) ,380 ( 9.65)
74 (22) .440 (11.18)
1 461 ,513 (18.08)
1% (29) 511 (14.66)
1% (52) ,639 (16.23)
1% (35) ,699 (17.75)
1% (38) ,159 (19.28)
Wire Rope
Wire Rope
Nominal Size Radii Nominal Size Radii
in. (mm) in. (mm) in. (mm) in. mm)
1% (42) .833 (21.16) 3% (86) 1.730 (43.94)
1% (45) ,891 (22.78) 3% ( 90) 1.794 (65.57)
1% (48) .959 (24.36) 3% ( 96) 1.918 (48.72)
2 (52) 1.025 (26.04) 4 (103) 2.050 (52.07)
2% (54) 1.019 (27.41) 4% 11091 2.178 (55.32)
2% (5s) 1.153 (29.29) 4% (115) 2.298 (58.97)
2% (60) 1.199 (30.45) 4% (122) 2.434 (61.82)
2% (64) 1.219 (S2.49) 5 (128) 2.551 (64.95)
2% (67) 1.339 (84.01) 5% (135) 2.691 (68.85)
2% (71) 1.409 (95.79) 5% (141) 2.811 (71.55)
274 (74) 1.413 (87.41) sS/r (148) 2.941 (74.85)
3 (77) 1.538 (39.07) 6 (154) 3.015 (7'8.11)
3% (80) 1.598 (40.59)
3% (88) 1.658 (42.12)
1 2 1 2
Wire Rope
Wire Rope
Nominal Size Radii Nominal Size Radii
in. (mm) in. (mm) in. (mm) in. (mm)
!4 6.5) .I35 ( S.4S) 1% (42) .876 (22.25)
ib (8) .161 ( 4.24) 1% (45) 9.39 (23.85)
K (9.5) ,201 ( 5.11) 1% (48) 1.003 (25.48)
l% (11) ,234 ( 5.94) 2 (52) 1.086 (P7.56)
% (131 ,271 6.88) 2% (54) 1.131 (28.88)
fi (14.5) ,303 ( 7.70) 2% (58) 1.210 (90.79)
% (16) ,334 ( 8.48) 2% (60) 1.271 (sp.28)
:I/r (19) .401 (10.19) 2% (64) 1.338 (33.99)
'n (22) ,468 (11.89) 2% (67) 1.404 (S5.68)
1 (26) .543 (13.79) 2% (71) 1.481 (37.62)
1% (29) ,605 (15.37) Z?? (74) 1.544 (S9.22)
1% (82) ,669 (16.99) 3 (77) 1.607 (40.89)
1% (35) .I36 (18.69) 3% (80) 1.664 (42.27)
1% (9s) .803 (20.40) 3% (83) 1.131 (43.97)
1 2
Wire Rope
Nominal Size Radii
in. (mm) in. (mm)
3% ( 86) 1.807 (45.90)
3% ( 90) 1.869 (47.47)
3% ( 96) 1.991 (50.72)
4 (108) 2.139 (54.SS)
4% (109) 2.264 (57.61)
4% (115) 2.396 (60.86)
4% (122) 2.534 (64.36)
5 (188) 2.663 (67.64)
5% (135) 2.804 (71.22)
5% (141) 2.929 (7b.40)
5% (148) 3.014 (78.08)
6 (154) 3.198 (81.28)
from worn sheaves as compared to the cost involved in regrooving. When a new
rope is to be installed on used sheaves, it is particularly important that the sheave
grooves be checked as recommended. To ensure a minimum turning effort, all
sheaves should be kept properly lubricated.
Seizing. Before cutting, a wire rope should be securely seized on each side of
the cut by serving with soft wire ties. For socketing, at least two additional
seizings should be placed at a distance from the end equal to the basket length
of the socket. The total length of the seizing should be at least two rope
diameters, and securely wrapped with a seizing iron. This is very important, as
it prevents the rope untwisting and ensures equal tension in the strands when
the load is applied.
The recommended procedure for seizing a wire rope is as follows: