This document appears to be a drilling mast and substructure visual inspection checklist. It contains sections to inspect the various components of the mast, including the upper mast section, lower mast section, tubing board, base mast section and more. It also includes sections to inspect the various substructure components, like the shoe, pedestal, beams, floor area, sub spreaders, rotary beam, deadline anchor mounting, and other substructure components. The inspection checklist provides fields to note the condition of each component listed.

1. 1

2. 1.MAST RIG
2.SUBSTRUCTURE
2

3. 1. MAST
DRILLING MAST VISUAL INSPECTION (API RP 4G ANNEX A)
Company / Client :
Rig No :
Date of Inspection :
Manufacture Rig :
Mast Manufacture :
Year of Manufacture :
Manufacture is Drawing available for use in inspection
Manufacture Rating :
Mast Serial Number :
Mast Type :
Mast Position
Mast Name Plate on structurE :
3

4. 1. MAST
DRILLING MAST VISUAL INSPECTION UPPER MAST SECTION
Operation Side Front Leg :
Operation Side Rear Leg :
Off side Front Leg :
Off side Rear Leg :
Joint Section :
Diagonal Bracing :
Back Bracing :
Rod Basket Mount :
Tubing Board Mount :
Upper Latch assembly (Lock) :
Cotter Keys in place :
Mast Ligthing Mount
4

5. 1. MAST
LOWER MAST SECTION
Operation Side Front Leg :
Operation Side Rear Leg :
Off side Front Leg :
Off side Rear Leg :
Joint Section :
Diagonal Bracing :
Back Bracing :
Lower Latch Assembly :
Cotter Keys in Place :
5

6. 1. MAST
LOWER MAST SECTION
Cotter Keys in Place :
Mast Hinge Point :
Stand Pipe Mount :
Block Hanging assembly
Leg Adjustment screw/Bolt :
Telescoping Cylinder
Stabilizer :
6

7. 1. MAST
TUBING BOARD (IN MONKEY BOARD)
Tubing Board Frame :
Frame Hinge Points :
Tail Gate Hinge Points :
Left Support Line Anchor :
Right Support Line Anchore :
Diving Board :
Hand Rail :
Fingers :
Safety Cable on Fingers :
Support Cable
7

8. 1. MAST
BASE MAST SECTION
Base Section Structur :
Diagonal Support :
Mast Locking Device :
Support Beam :
Pin Pivot Mast :
8

9. 1. MAST
BASE MAST SECTION
Base Section Structur :
Diagonal Support :
Mast Locking Device :
Support Beam :
Pin Pivot Mast :
9

10. 2. SUBSTRUCTURE
SUBSTRUCTURE VISUAL INSPECTION (API RP 4 G ANNEX D)
SHOE, PEDESTAL/ BEAM /PIPE
Pin Connection :
Pin Holes :
Connection system :
Pin , Bolts :
Safety Pin :
Support Beam :
Welds :
10

11. 2. SUBSTRUCTURE
SUBSTRUCTURE VISUAL INSPECTION (API RP 4 G ANNEX D)
FLOOR AREA
Floor Plates :
Handrail and Toe Board :
Handrail connection :
Setback material :
Floor Bracing :
Welds
11

12. 2. SUBSTRUCTURE
SUBSTRUCTURE VISUAL INSPECTION (API RP 4 G ANNEX D)
SUB SPREADER AND ROTARY BEAM
Rotary Beam :
Spreaders / Support floor :
Pin Connection :
Pin Holes :
Pins :
Pads Eyes :
Welds
12

13. 2. SUBSTRUCTURE
SUBSTRUCTURE VISUAL INSPECTION (API RP 4 G ANNEX D)
DEADLINE ANCHOR MOUNTING
Support :
Bolts and Nut :
Flooring :
Breakover assembly :
13

14. 2. SUBSTRUCTURE
SUBSTRUCTURE VISUAL INSPECTION (API RP 4 G ANNEX D)
SUBSTRUCTUR COMPONEN
Beam Straight :
Cross Brace :
Pin / Bolt / Hole :
Safety Pins :
Pull Back Posts :
Drawworks Tiedowns :
Welds :
BOP Anchore Pads eyes :
Pads eyes
14

15. 2. SUBSTRUCTURE
SUBSTRUCTURE VISUAL INSPECTION (API RP 4 G ANNEX D)
STARS / LANDING / FLOORING / HANDLAIR
Welds :
Pin / Bolt Holes :
Pin / Bolt :
Floor Plating :
Star Tread Spacing :
Handrails
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