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Well Control Surface Equipment 181

Table 4.4 Jack-up rig mud pit capacity
Pit number Working volume (bbl) Max volume (bbl)

Active 1 450 460
Active 2 490 500
Active 3 440 450
Reserve 1 540 550
Reserve 2 510 520
Reserve 3 575 580
Reserve 4 250 260
Pill pit 80 90
Slug pit 80 90
Water pit 180 190
Degasser 1 40 50
Degasser 2 40 50
Desilter 1 40 50
Desilter 2 40 50
Centrifuge 40 50

R1 A3
A2

Slug
R2 A1
Slug

R4
55
Water
Pit 10
R3 Air
Reserve pit 1-
550 bbls
Reserve pit 2-
Active pit 1 - 460 bbls 520 bbls
Reserve pit 3-
Active pit 2 - 500 bbls 580 bbls
Reserve pit 4-
Active pit 3 - 450 bbls 260 bbls
Pill pit 90 bbls
Slug pit 90 bbls
Water pit 190 bbls

Figure 4.30 Mud pit layout on a jack-up rig—corresponding to Table 4.4.