STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

538 Drilling and Well Completions
Notes io users:
lnternol line -
External line -pipe
1. Nofieldweldlngls
to be done belwwn
the ooupling nrpple
and the gooseneck
2. WertoAPlSpec7
tor specficatii for
swivel &em connections,
syhvel subs. and
mlary hose.
Rotary drilling hose
Swivel stem
Swivel sub
#
API Standard Rotary
Connection LH
-+--- SPEC EA
SPEC 7
A PI Standard Rotary
Connection LH
Figure 4-13. Rotary swivel connections [9].
Sheaves for Hoisting Blocks
The sheave diameter shall be the overall diameter D as shown in Figure 414.
Sheave diameters shall, wherever practicable, be determined in accordance with
recommendations given in the section titled “Wire Rope.”
Grooves for drilling and casing line sheaves shall be made for the rope size
specified by the purchaser. The bottom of the groove shall have a radius R,
Table 47, subtending an arc of 150’. The sides of the groove shall be tangent
to the ends of the bottom arc. Total groove depth shall be a minimum of 1.33d
and a maximum of 1.75d (d is the nominal rope diameter shown in Figure 414).
In the same manner, grooves for sand-line sheaves shall be made for the rope
size specified by the purchaser. The bottom of the groove shall have a radius
R, Table 4-6, subtending an arc of 150O. The sides of the groove shall be tangent
to the ends of the bottom arc. Total groove depth shall be a minimum of 1.75d
and a maximum of Sd, and d is nominal rope diameter (see Figure 4-14, B).
Sheaves should be replaced or reworked when the groove radius decreases
below the values shown in Table 4-8. Use sheave gages as shown in Figure 415.
Figure 415 A shows a sheave with a minimum groove radius, and Figure 4-15
B shows a sheave with a tight groove.